From b5d4481502a86c9e1df6579661a0bd6cfe357a91 Mon Sep 17 00:00:00 2001
From: Relism <itzdrekkopvp@gmail.com>
Date: Sun, 29 Mar 2026 23:16:41 +0200
Subject: [PATCH] preparing for another refactoring...

---
 .idea/encodings.xml                           |    4 +
 .idea/workspace.xml                           |   87 +-
 README.md                                     |    2 +-
 .../relism/ext/jackson/JacksonExtension.java  |   89 +-
 .../relism/ext/jackson/JacksonHandler.java    |   77 -
 .../java/dev/relism/ext/jackson/Json.java     |  126 ++
 .../flash-ext-limiter/docs/README.md          |   65 +
 .../flash-ext-limiter/docs/annotation.md      |  132 ++
 .../flash-ext-limiter/docs/guard.md           |  144 ++
 .../flash-ext-limiter/docs/http-headers.md    |  122 ++
 .../flash-ext-limiter/docs/key-resolvers.md   |  143 ++
 .../flash-ext-limiter/docs/strategies.md      |  178 +++
 flash-extensions/flash-ext-limiter/pom.xml    |   30 +
 .../java/dev/relism/ext/limiter/Bucket.java   |   22 +
 .../dev/relism/ext/limiter/BucketStore.java   |   28 +
 .../java/dev/relism/ext/limiter/Guard.java    |   69 +
 .../dev/relism/ext/limiter/KeyResolver.java   |   20 +
 .../java/dev/relism/ext/limiter/Limit.java    |   45 +
 .../dev/relism/ext/limiter/LimitConfig.java   |   11 +
 .../dev/relism/ext/limiter/LimitStrategy.java |   45 +
 .../dev/relism/ext/limiter/LimiterConfig.java |   82 ++
 .../relism/ext/limiter/LimiterExtension.java  |  130 ++
 .../relism/ext/limiter/RateLimitStrategy.java |   34 +
 .../limiter/strategy/FixedWindowStrategy.java |   54 +
 .../limiter/strategy/TokenBucketStrategy.java |   69 +
 .../dev/relism/ext/oidc/OidcExtension.java    |    6 +-
 .../dev/relism/ext/oidc/OidcMiddleware.java   |    2 +-
 flash-extensions/flash-ext-openapi/README.md  |    2 +-
 .../relism/ext/openapi/OpenApiExtension.java  |    4 +-
 .../openapi/OpenApiSecurityContributor.java   |    2 +-
 .../ext/openapi/OpenApiSecurityRegistry.java  |    2 +-
 .../routeviewer-ui/pnpm-lock.yaml             | 1233 +++++++++++++++++
 .../routeviewer-ui/src/layout.js              |    2 +-
 .../routeviewer-ui/src/nodes/HandlerNode.jsx  |   53 +-
 .../ext/routeviewer/RouteViewerExtension.java |    6 +-
 .../ext/routeviewer/model/RouteRecord.java    |   26 +-
 .../src/main/resources/routeviewer/app.js     |   28 +-
 flash-extensions/flash-ext-view/pom.xml       |   44 +
 .../java/dev/relism/ext/view/Renderer.java    |   98 ++
 .../java/dev/relism/ext/view/Template.java    |   62 +
 .../dev/relism/ext/view/ThymeleafEngine.java  |  146 ++
 .../main/java/dev/relism/ext/view/View.java   |   75 +
 .../java/dev/relism/ext/view/ViewEngine.java  |   45 +
 .../dev/relism/ext/view/ViewEngineType.java   |   80 ++
 .../dev/relism/ext/view/ViewExtension.java    |  166 +++
 flash-extensions/pom.xml                      |    2 +
 .../src/main/java/dev/relism/HttpServer.java  |   91 +-
 .../main/java/dev/relism/RequestParser.java   |   16 +-
 .../main/java/dev/relism/ServerHandle.java    |   14 +-
 .../DuplicateNamespaceException.java          |    7 -
 .../exceptions/InitializationException.java   |   18 +
 .../relism/extension/AnnotationProcessor.java |    2 +-
 .../java/dev/relism/extension/FlashApp.java   |  327 ++---
 ...xtensionContext.java => FlashContext.java} |   84 +-
 .../dev/relism/extension/FlashExtension.java  |    8 +-
 .../dev/relism/extension/FlashRegistrar.java  |   40 +-
 .../java/dev/relism/extension/FlashScope.java |  199 +--
 .../dev/relism/extension/PackageScanner.java  |   83 +-
 .../dev/relism/extension/RouteDefinition.java |   32 +
 .../dev/relism/extension/RouteListener.java   |    2 +-
 .../main/java/dev/relism/models/Request.java  |   51 +-
 .../dev/relism/models/RequestHandler.java     |  123 +-
 .../dev/relism/routing/AbstractRouter.java    |  154 +-
 .../java/dev/relism/routing/GlobalRouter.java |   75 -
 .../fastpathrouter/FastPathRouterImpl.java    |    8 +-
 .../relism/routing/AbstractRouterTest.java    |   56 +-
 .../dev/relism/routing/GlobalRouterTest.java  |   97 --
 .../FastPathRouterImplTest.java               |   16 +-
 pom.xml                                       |   10 +
 69 files changed, 4329 insertions(+), 1076 deletions(-)
 delete mode 100644 flash-extensions/flash-ext-jackson/src/main/java/dev/relism/ext/jackson/JacksonHandler.java
 create mode 100644 flash-extensions/flash-ext-jackson/src/main/java/dev/relism/ext/jackson/Json.java
 create mode 100644 flash-extensions/flash-ext-limiter/docs/README.md
 create mode 100644 flash-extensions/flash-ext-limiter/docs/annotation.md
 create mode 100644 flash-extensions/flash-ext-limiter/docs/guard.md
 create mode 100644 flash-extensions/flash-ext-limiter/docs/http-headers.md
 create mode 100644 flash-extensions/flash-ext-limiter/docs/key-resolvers.md
 create mode 100644 flash-extensions/flash-ext-limiter/docs/strategies.md
 create mode 100644 flash-extensions/flash-ext-limiter/pom.xml
 create mode 100644 flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/Bucket.java
 create mode 100644 flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/BucketStore.java
 create mode 100644 flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/Guard.java
 create mode 100644 flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/KeyResolver.java
 create mode 100644 flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/Limit.java
 create mode 100644 flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/LimitConfig.java
 create mode 100644 flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/LimitStrategy.java
 create mode 100644 flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/LimiterConfig.java
 create mode 100644 flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/LimiterExtension.java
 create mode 100644 flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/RateLimitStrategy.java
 create mode 100644 flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/strategy/FixedWindowStrategy.java
 create mode 100644 flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/strategy/TokenBucketStrategy.java
 create mode 100644 flash-extensions/flash-ext-routeviewer/routeviewer-ui/pnpm-lock.yaml
 create mode 100644 flash-extensions/flash-ext-view/pom.xml
 create mode 100644 flash-extensions/flash-ext-view/src/main/java/dev/relism/ext/view/Renderer.java
 create mode 100644 flash-extensions/flash-ext-view/src/main/java/dev/relism/ext/view/Template.java
 create mode 100644 flash-extensions/flash-ext-view/src/main/java/dev/relism/ext/view/ThymeleafEngine.java
 create mode 100644 flash-extensions/flash-ext-view/src/main/java/dev/relism/ext/view/View.java
 create mode 100644 flash-extensions/flash-ext-view/src/main/java/dev/relism/ext/view/ViewEngine.java
 create mode 100644 flash-extensions/flash-ext-view/src/main/java/dev/relism/ext/view/ViewEngineType.java
 create mode 100644 flash-extensions/flash-ext-view/src/main/java/dev/relism/ext/view/ViewExtension.java
 delete mode 100644 flash/src/main/java/dev/relism/exceptions/DuplicateNamespaceException.java
 create mode 100644 flash/src/main/java/dev/relism/exceptions/InitializationException.java
 rename flash/src/main/java/dev/relism/extension/{ExtensionContext.java => FlashContext.java} (54%)
 create mode 100644 flash/src/main/java/dev/relism/extension/RouteDefinition.java
 delete mode 100644 flash/src/main/java/dev/relism/routing/GlobalRouter.java
 delete mode 100644 flash/src/test/java/dev/relism/routing/GlobalRouterTest.java

diff --git a/.idea/encodings.xml b/.idea/encodings.xml
index b1479bf..976757e 100644
--- a/.idea/encodings.xml
+++ b/.idea/encodings.xml
@@ -7,12 +7,16 @@
     <file url="file://$PROJECT_DIR$/flash-extensions/flash-ext-api/src/main/resources" charset="UTF-8" />
     <file url="file://$PROJECT_DIR$/flash-extensions/flash-ext-jackson/src/main/java" charset="UTF-8" />
     <file url="file://$PROJECT_DIR$/flash-extensions/flash-ext-jackson/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/flash-extensions/flash-ext-limiter/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/flash-extensions/flash-ext-limiter/src/main/resources" charset="UTF-8" />
     <file url="file://$PROJECT_DIR$/flash-extensions/flash-ext-oidc/src/main/java" charset="UTF-8" />
     <file url="file://$PROJECT_DIR$/flash-extensions/flash-ext-oidc/src/main/resources" charset="UTF-8" />
     <file url="file://$PROJECT_DIR$/flash-extensions/flash-ext-openapi/src/main/java" charset="UTF-8" />
     <file url="file://$PROJECT_DIR$/flash-extensions/flash-ext-openapi/src/main/resources" charset="UTF-8" />
     <file url="file://$PROJECT_DIR$/flash-extensions/flash-ext-routeviewer/src/main/java" charset="UTF-8" />
     <file url="file://$PROJECT_DIR$/flash-extensions/flash-ext-routeviewer/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/flash-extensions/flash-ext-view/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/flash-extensions/flash-ext-view/src/main/resources" charset="UTF-8" />
     <file url="file://$PROJECT_DIR$/flash-extensions/src/main/java" charset="UTF-8" />
     <file url="file://$PROJECT_DIR$/flash-extensions/src/main/resources" charset="UTF-8" />
     <file url="file://$PROJECT_DIR$/flash/src/main/java" charset="UTF-8" />
diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index f53c935..29eb7ad 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -4,31 +4,75 @@
     <option name="autoReloadType" value="SELECTIVE" />
   </component>
   <component name="ChangeListManager">
-    <list default="true" id="fc757130-fe3e-4ea9-8d69-c26ffb8545a4" name="Changes" comment="pre-major refactoring + ext api.">
-      <change beforePath="$PROJECT_DIR$/.gitignore" beforeDir="false" afterPath="$PROJECT_DIR$/.gitignore" afterDir="false" />
+    <list default="true" id="fc757130-fe3e-4ea9-8d69-c26ffb8545a4" name="Changes" comment="preparing for a conceptual refactoring...">
+      <change afterPath="$PROJECT_DIR$/flash-extensions/flash-ext-jackson/src/main/java/dev/relism/ext/jackson/Json.java" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/flash-extensions/flash-ext-limiter/docs/README.md" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/flash-extensions/flash-ext-limiter/docs/annotation.md" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/flash-extensions/flash-ext-limiter/docs/guard.md" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/flash-extensions/flash-ext-limiter/docs/http-headers.md" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/flash-extensions/flash-ext-limiter/docs/key-resolvers.md" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/flash-extensions/flash-ext-limiter/docs/strategies.md" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/flash-extensions/flash-ext-limiter/pom.xml" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/Bucket.java" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/BucketStore.java" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/Guard.java" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/KeyResolver.java" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/Limit.java" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/LimitConfig.java" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/LimitStrategy.java" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/LimiterConfig.java" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/LimiterExtension.java" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/RateLimitStrategy.java" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/strategy/FixedWindowStrategy.java" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/strategy/TokenBucketStrategy.java" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/flash-extensions/flash-ext-routeviewer/routeviewer-ui/pnpm-lock.yaml" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/flash-extensions/flash-ext-view/pom.xml" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/flash-extensions/flash-ext-view/src/main/java/dev/relism/ext/view/Renderer.java" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/flash-extensions/flash-ext-view/src/main/java/dev/relism/ext/view/Template.java" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/flash-extensions/flash-ext-view/src/main/java/dev/relism/ext/view/ThymeleafEngine.java" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/flash-extensions/flash-ext-view/src/main/java/dev/relism/ext/view/View.java" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/flash-extensions/flash-ext-view/src/main/java/dev/relism/ext/view/ViewEngine.java" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/flash-extensions/flash-ext-view/src/main/java/dev/relism/ext/view/ViewEngineType.java" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/flash-extensions/flash-ext-view/src/main/java/dev/relism/ext/view/ViewExtension.java" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/flash/src/main/java/dev/relism/exceptions/InitializationException.java" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/flash/src/main/java/dev/relism/extension/FlashContext.java" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/flash/src/main/java/dev/relism/extension/RouteDefinition.java" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/.idea/encodings.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/encodings.xml" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/README.md" beforeDir="false" afterPath="$PROJECT_DIR$/README.md" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/flash-extensions/flash-ext-jackson/README.md" beforeDir="false" afterPath="$PROJECT_DIR$/flash-extensions/flash-ext-jackson/README.md" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/flash-extensions/flash-ext-jackson/src/main/java/dev/relism/ext/jackson/JacksonExtension.java" beforeDir="false" afterPath="$PROJECT_DIR$/flash-extensions/flash-ext-jackson/src/main/java/dev/relism/ext/jackson/JacksonExtension.java" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/flash-extensions/flash-ext-oidc/README.md" beforeDir="false" afterPath="$PROJECT_DIR$/flash-extensions/flash-ext-oidc/README.md" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/flash-extensions/flash-ext-oidc/src/main/java/dev/relism/ext/oidc/Authenticated.java" beforeDir="false" afterPath="$PROJECT_DIR$/flash-extensions/flash-ext-oidc/src/main/java/dev/relism/ext/oidc/Authenticated.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/flash-extensions/flash-ext-jackson/src/main/java/dev/relism/ext/jackson/JacksonHandler.java" beforeDir="false" />
       <change beforePath="$PROJECT_DIR$/flash-extensions/flash-ext-oidc/src/main/java/dev/relism/ext/oidc/OidcExtension.java" beforeDir="false" afterPath="$PROJECT_DIR$/flash-extensions/flash-ext-oidc/src/main/java/dev/relism/ext/oidc/OidcExtension.java" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/flash-extensions/flash-ext-oidc/src/main/java/dev/relism/ext/oidc/OidcMiddleware.java" beforeDir="false" afterPath="$PROJECT_DIR$/flash-extensions/flash-ext-oidc/src/main/java/dev/relism/ext/oidc/OidcMiddleware.java" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/flash-extensions/flash-ext-openapi/README.md" beforeDir="false" afterPath="$PROJECT_DIR$/flash-extensions/flash-ext-openapi/README.md" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/flash-extensions/flash-ext-openapi/src/main/java/dev/relism/ext/openapi/OpenApiExtension.java" beforeDir="false" afterPath="$PROJECT_DIR$/flash-extensions/flash-ext-openapi/src/main/java/dev/relism/ext/openapi/OpenApiExtension.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/flash-extensions/flash-ext-openapi/src/main/java/dev/relism/ext/openapi/OpenApiSecurityContributor.java" beforeDir="false" afterPath="$PROJECT_DIR$/flash-extensions/flash-ext-openapi/src/main/java/dev/relism/ext/openapi/OpenApiSecurityContributor.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/flash-extensions/flash-ext-openapi/src/main/java/dev/relism/ext/openapi/OpenApiSecurityRegistry.java" beforeDir="false" afterPath="$PROJECT_DIR$/flash-extensions/flash-ext-openapi/src/main/java/dev/relism/ext/openapi/OpenApiSecurityRegistry.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/flash-extensions/flash-ext-routeviewer/routeviewer-ui/src/layout.js" beforeDir="false" afterPath="$PROJECT_DIR$/flash-extensions/flash-ext-routeviewer/routeviewer-ui/src/layout.js" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/flash-extensions/flash-ext-routeviewer/routeviewer-ui/src/nodes/HandlerNode.jsx" beforeDir="false" afterPath="$PROJECT_DIR$/flash-extensions/flash-ext-routeviewer/routeviewer-ui/src/nodes/HandlerNode.jsx" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/flash-extensions/flash-ext-routeviewer/src/main/java/dev/relism/ext/routeviewer/RouteViewerExtension.java" beforeDir="false" afterPath="$PROJECT_DIR$/flash-extensions/flash-ext-routeviewer/src/main/java/dev/relism/ext/routeviewer/RouteViewerExtension.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/flash-extensions/flash-ext-routeviewer/src/main/java/dev/relism/ext/routeviewer/model/RouteRecord.java" beforeDir="false" afterPath="$PROJECT_DIR$/flash-extensions/flash-ext-routeviewer/src/main/java/dev/relism/ext/routeviewer/model/RouteRecord.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/flash-extensions/flash-ext-routeviewer/src/main/resources/routeviewer/app.js" beforeDir="false" afterPath="$PROJECT_DIR$/flash-extensions/flash-ext-routeviewer/src/main/resources/routeviewer/app.js" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/flash-extensions/pom.xml" beforeDir="false" afterPath="$PROJECT_DIR$/flash-extensions/pom.xml" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/flash/src/main/java/dev/relism/HttpServer.java" beforeDir="false" afterPath="$PROJECT_DIR$/flash/src/main/java/dev/relism/HttpServer.java" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/flash/src/main/java/dev/relism/HttpServerConfiguration.java" beforeDir="false" />
-      <change beforePath="$PROJECT_DIR$/flash/src/main/java/dev/relism/extension/ExtensionContext.java" beforeDir="false" afterPath="$PROJECT_DIR$/flash/src/main/java/dev/relism/extension/ExtensionContext.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/flash/src/main/java/dev/relism/RequestParser.java" beforeDir="false" afterPath="$PROJECT_DIR$/flash/src/main/java/dev/relism/RequestParser.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/flash/src/main/java/dev/relism/ServerHandle.java" beforeDir="false" afterPath="$PROJECT_DIR$/flash/src/main/java/dev/relism/ServerHandle.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/flash/src/main/java/dev/relism/exceptions/DuplicateNamespaceException.java" beforeDir="false" />
+      <change beforePath="$PROJECT_DIR$/flash/src/main/java/dev/relism/extension/AnnotationProcessor.java" beforeDir="false" afterPath="$PROJECT_DIR$/flash/src/main/java/dev/relism/extension/AnnotationProcessor.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/flash/src/main/java/dev/relism/extension/ExtensionContext.java" beforeDir="false" />
       <change beforePath="$PROJECT_DIR$/flash/src/main/java/dev/relism/extension/FlashApp.java" beforeDir="false" afterPath="$PROJECT_DIR$/flash/src/main/java/dev/relism/extension/FlashApp.java" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/flash/src/main/java/dev/relism/extension/FlashExtension.java" beforeDir="false" afterPath="$PROJECT_DIR$/flash/src/main/java/dev/relism/extension/FlashExtension.java" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/flash/src/main/java/dev/relism/models/Response.java" beforeDir="false" afterPath="$PROJECT_DIR$/flash/src/main/java/dev/relism/models/Response.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/flash/src/main/java/dev/relism/extension/FlashRegistrar.java" beforeDir="false" afterPath="$PROJECT_DIR$/flash/src/main/java/dev/relism/extension/FlashRegistrar.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/flash/src/main/java/dev/relism/extension/FlashScope.java" beforeDir="false" afterPath="$PROJECT_DIR$/flash/src/main/java/dev/relism/extension/FlashScope.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/flash/src/main/java/dev/relism/extension/PackageScanner.java" beforeDir="false" afterPath="$PROJECT_DIR$/flash/src/main/java/dev/relism/extension/PackageScanner.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/flash/src/main/java/dev/relism/extension/RouteListener.java" beforeDir="false" afterPath="$PROJECT_DIR$/flash/src/main/java/dev/relism/extension/RouteListener.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/flash/src/main/java/dev/relism/models/Request.java" beforeDir="false" afterPath="$PROJECT_DIR$/flash/src/main/java/dev/relism/models/Request.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/flash/src/main/java/dev/relism/models/RequestHandler.java" beforeDir="false" afterPath="$PROJECT_DIR$/flash/src/main/java/dev/relism/models/RequestHandler.java" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/flash/src/main/java/dev/relism/routing/AbstractRouter.java" beforeDir="false" afterPath="$PROJECT_DIR$/flash/src/main/java/dev/relism/routing/AbstractRouter.java" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/flash/src/test/java/dev/relism/HttpServerConcurrencyTest.java" beforeDir="false" afterPath="$PROJECT_DIR$/flash/src/test/java/dev/relism/HttpServerConcurrencyTest.java" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/flash/src/test/java/dev/relism/HttpServerTest.java" beforeDir="false" afterPath="$PROJECT_DIR$/flash/src/test/java/dev/relism/HttpServerTest.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/flash/src/main/java/dev/relism/routing/GlobalRouter.java" beforeDir="false" />
+      <change beforePath="$PROJECT_DIR$/flash/src/main/java/dev/relism/routing/routers/fastpathrouter/FastPathRouterImpl.java" beforeDir="false" afterPath="$PROJECT_DIR$/flash/src/main/java/dev/relism/routing/routers/fastpathrouter/FastPathRouterImpl.java" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/flash/src/test/java/dev/relism/routing/AbstractRouterTest.java" beforeDir="false" afterPath="$PROJECT_DIR$/flash/src/test/java/dev/relism/routing/AbstractRouterTest.java" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/flash/src/test/java/dev/relism/routing/GlobalRouterTest.java" beforeDir="false" afterPath="$PROJECT_DIR$/flash/src/test/java/dev/relism/routing/GlobalRouterTest.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/flash/src/test/java/dev/relism/routing/GlobalRouterTest.java" beforeDir="false" />
       <change beforePath="$PROJECT_DIR$/flash/src/test/java/dev/relism/routing/routers/fastpathrouter/FastPathRouterImplTest.java" beforeDir="false" afterPath="$PROJECT_DIR$/flash/src/test/java/dev/relism/routing/routers/fastpathrouter/FastPathRouterImplTest.java" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/pom.xml" beforeDir="false" afterPath="$PROJECT_DIR$/pom.xml" afterDir="false" />
     </list>
@@ -44,7 +88,7 @@
     </persistenceIdMap>
   </component>
   <component name="EmbeddingIndexingInfo">
-    <option name="cachedIndexableFilesCount" value="203" />
+    <option name="cachedIndexableFilesCount" value="226" />
     <option name="fileBasedEmbeddingIndicesEnabled" value="true" />
   </component>
   <component name="FileTemplateManagerImpl">
@@ -99,6 +143,8 @@
     &quot;Maven.flash-bench [install].executor&quot;: &quot;Run&quot;,
     &quot;Maven.flash-bench [package].executor&quot;: &quot;Run&quot;,
     &quot;Maven.flash-bench [validate].executor&quot;: &quot;Run&quot;,
+    &quot;Maven.flash-ext-limiter [install].executor&quot;: &quot;Run&quot;,
+    &quot;Maven.flash-ext-limiter [package].executor&quot;: &quot;Run&quot;,
     &quot;Maven.flash-parent [install].executor&quot;: &quot;Run&quot;,
     &quot;Maven.flash-parent [package].executor&quot;: &quot;Run&quot;,
     &quot;ModuleVcsDetector.initialDetectionPerformed&quot;: &quot;true&quot;,
@@ -271,6 +317,10 @@
       <workItem from="1774628513273" duration="86000" />
       <workItem from="1774638461244" duration="5718000" />
       <workItem from="1774691772785" duration="3801000" />
+      <workItem from="1774703412987" duration="25271000" />
+      <workItem from="1774777423667" duration="2127000" />
+      <workItem from="1774790933314" duration="10099000" />
+      <workItem from="1774814271256" duration="2412000" />
     </task>
     <task id="LOCAL-00001" summary="Initial">
       <option name="closed" value="true" />
@@ -336,7 +386,15 @@
       <option name="project" value="LOCAL" />
       <updated>1774530802482</updated>
     </task>
-    <option name="localTasksCounter" value="9" />
+    <task id="LOCAL-00009" summary="preparing for a conceptual refactoring...">
+      <option name="closed" value="true" />
+      <created>1774703474044</created>
+      <option name="number" value="00009" />
+      <option name="presentableId" value="LOCAL-00009" />
+      <option name="project" value="LOCAL" />
+      <updated>1774703474044</updated>
+    </task>
+    <option name="localTasksCounter" value="10" />
     <servers />
   </component>
   <component name="TypeScriptGeneratedFilesManager">
@@ -374,7 +432,8 @@
     <MESSAGE value="multipart parsing, request body access, and chunked input stream support" />
     <MESSAGE value="enhanced router middleware support; added pre-fused middleware handling and improved handler registration" />
     <MESSAGE value="pre-major refactoring + ext api." />
-    <option name="LAST_COMMIT_MESSAGE" value="pre-major refactoring + ext api." />
+    <MESSAGE value="preparing for a conceptual refactoring..." />
+    <option name="LAST_COMMIT_MESSAGE" value="preparing for a conceptual refactoring..." />
   </component>
   <component name="XSLT-Support.FileAssociations.UIState">
     <expand />
diff --git a/README.md b/README.md
index d35515a..b2a87be 100644
--- a/README.md
+++ b/README.md
@@ -124,7 +124,7 @@ app.mount("/api", scope -> {
 ## Extensions
 
 Extensions are installed before route registration. Each extension receives the `FlashRegistrar`
-and `ExtensionContext` — it can register routes, expose services, and register annotation processors.
+and `FlashContext` — it can register routes, expose services, and register annotation processors.
 
 ```java
 FlashApp.create(8080)
diff --git a/flash-extensions/flash-ext-jackson/src/main/java/dev/relism/ext/jackson/JacksonExtension.java b/flash-extensions/flash-ext-jackson/src/main/java/dev/relism/ext/jackson/JacksonExtension.java
index 908777b..5292846 100644
--- a/flash-extensions/flash-ext-jackson/src/main/java/dev/relism/ext/jackson/JacksonExtension.java
+++ b/flash-extensions/flash-ext-jackson/src/main/java/dev/relism/ext/jackson/JacksonExtension.java
@@ -2,71 +2,76 @@ package dev.relism.ext.jackson;
 
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.json.JsonMapper;
-import dev.relism.exceptions.HttpException;
-import dev.relism.extension.ExtensionContext;
+import dev.relism.extension.FlashContext;
 import dev.relism.extension.FlashExtension;
 import dev.relism.extension.FlashRegistrar;
-import dev.relism.http.ContentType;
 
 /**
- * Registers Jackson into the extension layer.
+ * Registers JSON support into the Flash extension layer.
  *
- * <p>What this installs:
- * <ul>
- *   <li>Exposes the {@link ObjectMapper} in {@link ExtensionContext} — consumed by
- *       {@code flash-ext-openapi} and any extension that needs JSON serialization.</li>
- *   <li>Sets a global exception handler that maps {@link HttpException} to a JSON
- *       error body and catches all other exceptions as 500.</li>
- *   <li>Injects the mapper into {@link JacksonHandler} so all subclasses gain
- *       {@code bodyAs} and {@code json} without constructor boilerplate.</li>
- * </ul>
+ * <p>Exposes a {@link Json} utility instance in the {@link FlashContext} under
+ * {@code Json.class}. Any handler or extension in the same scope can retrieve
+ * it via {@code require(Json.class)} inside {@code onInit()}.
  *
+ * <p>The raw {@link ObjectMapper} is also registered under {@code ObjectMapper.class}
+ * for extensions that need direct mapper access (e.g. OpenAPI schema generation).
+ *
+ * <h3>Usage — composition (preferred)</h3>
  * <pre>{@code
- * FlashApp.of(new HttpServer(config))
- *     .install(new JacksonExtension());
+ * // No mandatory base class. Works from any RequestHandler.
+ * public class MyHandler extends RequestHandler {
+ *     private Json json;
  *
- * // Custom mapper:
+ *     @Override protected void onInit() {
+ *         json = require(Json.class);
+ *     }
+ *
+ *     public Object handle(Request req, Response res) throws Exception {
+ *         MyDto dto = json.body(req, MyDto.class);
+ *         return json.write(res, 201, dto);
+ *     }
+ * }
+ * }</pre>
+ *
+ * <h3>Usage — convenience base class</h3>
+ * <pre>{@code
+ * // JacksonHandler remains available as a thin opt-in wrapper.
+ * public class MyHandler extends JacksonHandler {
+ *     public Object handle(Request req, Response res) throws Exception {
+ *         return json(res, service.findAll());
+ *     }
+ * }
+ * }</pre>
+ *
+ * <h3>Custom mapper</h3>
+ * <pre>{@code
  * ObjectMapper mapper = JsonMapper.builder()
- *     .addModule(new JavaTimeModule())
- *     .build();
- * .install(new JacksonExtension(mapper));
+ *         .addModule(new JavaTimeModule())
+ *         .disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS)
+ *         .build();
+ *
+ * FlashApp.create(8080)
+ *         .install(new JacksonExtension(mapper));
  * }</pre>
  */
 public class JacksonExtension implements FlashExtension {
 
     private final ObjectMapper mapper;
 
+    /** Installs with a default {@link JsonMapper} (no extra modules). */
     public JacksonExtension() {
         this(JsonMapper.builder().build());
     }
 
+    /** Installs with a fully configured custom {@link ObjectMapper}. */
     public JacksonExtension(ObjectMapper mapper) {
         this.mapper = mapper;
     }
 
     @Override
-    public void install(FlashRegistrar app, ExtensionContext ctx) {
-        ctx.provide(ObjectMapper.class, mapper);
-        JacksonHandler.mapper = mapper;
-
-        app.onException((ex, req, res) -> {
-            if (ex instanceof HttpException e) {
-                res.setStatusCode(e.status());
-                res.setContentType(ContentType.JSON);
-                return "{\"error\":\"" + escapeJson(e.getMessage()) + "\"}";
-            }
-            res.setStatusCode(500);
-            res.setContentType(ContentType.JSON);
-            return "{\"error\":\"Internal Server Error\"}";
-        });
-    }
-
-    private static String escapeJson(String s) {
-        if (s == null) return "";
-        return s.replace("\\", "\\\\")
-                .replace("\"", "\\\"")
-                .replace("\n", "\\n")
-                .replace("\r", "\\r")
-                .replace("\t", "\\t");
+    public void install(FlashRegistrar app, FlashContext ctx) {
+        Json json = new Json(mapper);
+        ctx.provide(Json.class,         json);
+        ctx.provide(ObjectMapper.class, mapper);   // backward compat for extensions (OpenAPI, etc.)
     }
 }
diff --git a/flash-extensions/flash-ext-jackson/src/main/java/dev/relism/ext/jackson/JacksonHandler.java b/flash-extensions/flash-ext-jackson/src/main/java/dev/relism/ext/jackson/JacksonHandler.java
deleted file mode 100644
index 31c693d..0000000
--- a/flash-extensions/flash-ext-jackson/src/main/java/dev/relism/ext/jackson/JacksonHandler.java
+++ /dev/null
@@ -1,77 +0,0 @@
-package dev.relism.ext.jackson;
-
-import com.fasterxml.jackson.core.JsonProcessingException;
-import com.fasterxml.jackson.databind.ObjectMapper;
-import dev.relism.exceptions.HttpException;
-import dev.relism.http.ContentType;
-import dev.relism.models.Request;
-import dev.relism.models.RequestHandler;
-import dev.relism.models.Response;
-
-/**
- * Base class for handlers that need JSON I/O via Jackson.
- *
- * <p>The {@link ObjectMapper} is injected by {@link JacksonExtension#install} once at
- * startup — all subclasses share the same instance. If no {@code JacksonExtension} is
- * installed the field remains {@code null} and the first call to {@link #bodyAs} or
- * {@link #json} will throw an {@link IllegalStateException}.
- *
- * <pre>{@code
- * @Route(method = HttpMethod.POST, path = "/api/blogs")
- * public class CreateBlog extends JacksonHandler {
- *     public Object handle(Request req, Response res) throws Exception {
- *         CreateBlogRequest body = bodyAs(req, CreateBlogRequest.class);
- *         Blog created = service.create(body);
- *         res.setStatusCode(201);
- *         return json(res, created);
- *     }
- * }
- * }</pre>
- */
-public abstract class JacksonHandler extends RequestHandler {
-
-    /**
-     * Shared mapper set by {@link JacksonExtension}. Package-visible so the extension
-     * can assign it; {@code volatile} ensures visibility across virtual threads.
-     */
-    static volatile ObjectMapper mapper;
-
-    /**
-     * Deserializes the request body bytes into {@code type}.
-     * Wraps Jackson parse errors as {@link HttpException} 400.
-     */
-    protected <T> T bodyAs(Request req, Class<T> type) throws Exception {
-        requireMapper();
-        try {
-            return mapper.readValue(req.body().bytes(), type);
-        } catch (JsonProcessingException e) {
-            throw HttpException.badRequest("Invalid request body: " + e.getOriginalMessage());
-        }
-    }
-
-    /**
-     * Serializes {@code obj} to JSON, sets {@code Content-Type: application/json},
-     * and returns the JSON string as the response body.
-     */
-    protected String json(Response res, Object obj) throws Exception {
-        requireMapper();
-        res.setContentType(ContentType.JSON);
-        return mapper.writeValueAsString(obj);
-    }
-
-    /**
-     * Like {@link #json} but serializes only fields visible under the given
-     * {@code view} class (see Jackson {@code @JsonView}).
-     */
-    protected String jsonView(Response res, Object obj, Class<?> view) throws Exception {
-        requireMapper();
-        res.setContentType(ContentType.JSON);
-        return mapper.writerWithView(view).writeValueAsString(obj);
-    }
-
-    private static void requireMapper() {
-        if (mapper == null)
-            throw new IllegalStateException(
-                    "JacksonExtension not installed: call FlashApp.install(new JacksonExtension()) first");
-    }
-}
diff --git a/flash-extensions/flash-ext-jackson/src/main/java/dev/relism/ext/jackson/Json.java b/flash-extensions/flash-ext-jackson/src/main/java/dev/relism/ext/jackson/Json.java
new file mode 100644
index 0000000..a8760f6
--- /dev/null
+++ b/flash-extensions/flash-ext-jackson/src/main/java/dev/relism/ext/jackson/Json.java
@@ -0,0 +1,126 @@
+package dev.relism.ext.jackson;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import dev.relism.exceptions.HttpException;
+import dev.relism.http.ContentType;
+import dev.relism.models.Request;
+import dev.relism.models.Response;
+
+/**
+ * Thread-safe JSON toolbox. Single point of access for all JSON I/O operations
+ * within a Flash application.
+ *
+ * <p>Retrieve once at boot time via {@code require(Json.class)} inside
+ * {@code onInit()}, cache in a private field, and call on the hot path
+ * with zero lookup or allocation overhead:
+ *
+ * <pre>{@code
+ * @Route(method = HttpMethod.POST, path = "/api/items")
+ * public class CreateItemHandler extends RequestHandler {
+ *
+ *     private Json json;
+ *
+ *     @Override
+ *     protected void onInit() {
+ *         json = require(Json.class);
+ *     }
+ *
+ *     public Object handle(Request req, Response res) throws Exception {
+ *         CreateItemRequest body = json.body(req, CreateItemRequest.class);
+ *         return json.write(res, itemService.create(body));
+ *     }
+ * }
+ * }</pre>
+ *
+ * <p>The underlying {@link ObjectMapper} is shared across all handlers in the same
+ * scope (one instance per app / per child scope). Jackson's {@code ObjectMapper}
+ * is fully thread-safe after configuration — no synchronization is needed.
+ *
+ * <p>Install via {@link JacksonExtension} before calling {@code scan()} or
+ * {@code register()}.
+ */
+public final class Json {
+
+    private final ObjectMapper mapper;
+
+    /** Package-private — constructed exclusively by {@link JacksonExtension}. */
+    Json(ObjectMapper mapper) {
+        this.mapper = mapper;
+    }
+
+    // ── Input ─────────────────────────────────────────────────────────────────
+
+    /**
+     * Deserializes the full request body into an instance of {@code type}.
+     *
+     * <p>Reads {@code req.body().bytes()} in one shot. For streaming bodies
+     * use {@link #bodyFrom(Request, Class)} instead.
+     *
+     * @throws HttpException 400 if the body cannot be parsed as {@code type}
+     */
+    public <T> T body(Request req, Class<T> type) throws Exception {
+        try {
+            return mapper.readValue(req.body().bytes(), type);
+        } catch (JsonProcessingException e) {
+            throw HttpException.badRequest("Invalid request body: " + e.getOriginalMessage());
+        }
+    }
+
+    /**
+     * Deserializes the request body via the raw {@link java.io.InputStream},
+     * avoiding the intermediate {@code byte[]} allocation. Prefer this for
+     * large bodies or when allocation budget is tight.
+     *
+     * @throws HttpException 400 on parse failure
+     */
+    public <T> T bodyFrom(Request req, Class<T> type) throws Exception {
+        try {
+            return mapper.readValue(req.body().stream(), type);
+        } catch (JsonProcessingException e) {
+            throw HttpException.badRequest("Invalid request body: " + e.getOriginalMessage());
+        }
+    }
+
+    // ── Output ────────────────────────────────────────────────────────────────
+
+    /**
+     * Serializes {@code obj} to a JSON string and sets
+     * {@code Content-Type: application/json} on the response.
+     *
+     * <p>The returned string is used as the response body by the Flash runtime.
+     */
+    public String write(Response res, Object obj) throws Exception {
+        res.setContentType(ContentType.JSON);
+        return mapper.writeValueAsString(obj);
+    }
+
+    /**
+     * Like {@link #write(Response, Object)} but also sets an explicit HTTP status code.
+     */
+    public String write(Response res, int status, Object obj) throws Exception {
+        res.status(status);
+        res.setContentType(ContentType.JSON);
+        return mapper.writeValueAsString(obj);
+    }
+
+    /**
+     * Like {@link #write} but applies a Jackson {@code @JsonView} filter,
+     * restricting serialization to fields visible under {@code view}.
+     */
+    public String writeView(Response res, Object obj, Class<?> view) throws Exception {
+        res.setContentType(ContentType.JSON);
+        return mapper.writerWithView(view).writeValueAsString(obj);
+    }
+
+    // ── Escape hatch ──────────────────────────────────────────────────────────
+
+    /**
+     * Returns the underlying {@link ObjectMapper} for advanced operations
+     * (custom serialization, schema generation, etc.) not covered by the
+     * methods above.
+     */
+    public ObjectMapper mapper() {
+        return mapper;
+    }
+}
diff --git a/flash-extensions/flash-ext-limiter/docs/README.md b/flash-extensions/flash-ext-limiter/docs/README.md
new file mode 100644
index 0000000..098b0d8
--- /dev/null
+++ b/flash-extensions/flash-ext-limiter/docs/README.md
@@ -0,0 +1,65 @@
+# flash-ext-limiter
+
+Rate limiting for the Flash HTTP server. Zero-allocation hot-path, lock-free counters,
+pluggable key resolvers, and two built-in algorithms.
+
+## What it provides
+
+| Component | Description |
+|---|---|
+| `@Limit` | Annotation for class-based handlers — processed once at boot |
+| `Guard` | Programmatic middleware factory for lambda routes |
+| `LimiterConfig` | Resolver registry — map string names to key-extraction lambdas |
+| `FIXED_WINDOW` | Clock-aligned counter reset; minimal memory |
+| `TOKEN_BUCKET` | Continuous refill; absorbs bursts smoothly |
+
+## Dependency
+
+```xml
+<dependency>
+    <groupId>dev.relism</groupId>
+    <artifactId>flash-ext-limiter</artifactId>
+    <version>1.0-SNAPSHOT</version>
+</dependency>
+```
+
+## Quick start
+
+```java
+// Default install — only the built-in "ip" resolver available
+FlashApp.create(8080)
+    .install(new LimiterExtension())
+    .scan("com.example.handlers");
+```
+
+```java
+// With custom resolvers
+LimiterConfig conf = new LimiterConfig()
+    .registerResolver("auth_user", req ->
+        ClaimsHolder.exists() ? ClaimsHolder.user().sub() : "anonymous");
+
+FlashApp.create(8080)
+    .install(new LimiterExtension(conf))
+    .scan("com.example.handlers");
+```
+
+## Installation order
+
+Install `LimiterExtension` **before** authentication extensions. Rate-limit checks
+then short-circuit over-limit requests before expensive token validation runs.
+
+```java
+app.install(new LimiterExtension(conf))   // ← first
+   .install(new OidcExtension(oidcConf))  // ← second
+   .scan("com.example");
+```
+
+## Docs
+
+| File | Contents |
+|---|---|
+| [key-resolvers.md](key-resolvers.md) | Resolver registration, built-in defaults, custom logic |
+| [annotation.md](annotation.md) | `@Limit` reference — all fields and examples |
+| [guard.md](guard.md) | `Guard` for lambda routes — all overloads |
+| [strategies.md](strategies.md) | `FIXED_WINDOW` vs `TOKEN_BUCKET` — algorithm reference |
+| [http-headers.md](http-headers.md) | HTTP compliance — headers and 429 response |
diff --git a/flash-extensions/flash-ext-limiter/docs/annotation.md b/flash-extensions/flash-ext-limiter/docs/annotation.md
new file mode 100644
index 0000000..8523a7a
--- /dev/null
+++ b/flash-extensions/flash-ext-limiter/docs/annotation.md
@@ -0,0 +1,132 @@
+# @Limit annotation
+
+Applies a rate limit to a **class-based** `RequestHandler`. The annotation is read once
+per handler class at boot by the `LimiterExtension` annotation processor — zero overhead
+at request time.
+
+## Declaration
+
+```java
+@Target(ElementType.TYPE)
+@Retention(RetentionPolicy.RUNTIME)
+public @interface Limit {
+    String      key()        default "ip";
+    int         requests();
+    long        window();
+    TimeUnit    windowUnit() default TimeUnit.SECONDS;
+    LimitStrategy strategy() default LimitStrategy.FIXED_WINDOW;
+}
+```
+
+## Fields
+
+| Field | Type | Default | Description |
+|---|---|---|---|
+| `key` | `String` | `"ip"` | Name of the key resolver registered in `LimiterConfig` |
+| `requests` | `int` | — | Maximum requests allowed per window (required) |
+| `window` | `long` | — | Window duration in `windowUnit` units (required) |
+| `windowUnit` | `TimeUnit` | `SECONDS` | Time unit for `window` |
+| `strategy` | `LimitStrategy` | `FIXED_WINDOW` | Rate-limit algorithm |
+
+## Basic usage
+
+### 100 requests per second per IP (default)
+
+```java
+@Route(method = HttpMethod.GET, path = "/api/search")
+@Limit(requests = 100, window = 1)
+public class SearchHandler extends RequestHandler {
+    public Object handle(Request req, Response res) {
+        return searchService.query(req.query("q"));
+    }
+}
+```
+
+### 20 requests per minute per authenticated user
+
+```java
+@Route(method = HttpMethod.POST, path = "/api/report")
+@Limit(key = "auth_user", requests = 20, window = 1, windowUnit = TimeUnit.MINUTES)
+@Authenticated
+public class ReportHandler extends RequestHandler {
+    public Object handle(Request req, Response res) { ... }
+}
+```
+
+Order of annotation processors: register `LimiterExtension` before `OidcExtension`
+so the rate-limit middleware wraps the outer layer of the chain and fires before auth.
+
+### Token bucket — absorb bursts
+
+```java
+@Route(method = HttpMethod.POST, path = "/api/upload")
+@Limit(
+    key        = "api_key",
+    requests   = 50,
+    window     = 1,
+    windowUnit = TimeUnit.MINUTES,
+    strategy   = LimitStrategy.TOKEN_BUCKET
+)
+public class UploadHandler extends RequestHandler { ... }
+```
+
+### Large window — 1000 requests per hour
+
+```java
+@Route(method = HttpMethod.GET, path = "/api/export")
+@Limit(requests = 1000, window = 1, windowUnit = TimeUnit.HOURS)
+public class ExportHandler extends RequestHandler { ... }
+```
+
+### Strict per-second limit on a public endpoint
+
+```java
+@Route(method = HttpMethod.GET, path = "/api/prices")
+@Limit(requests = 10, window = 1, windowUnit = TimeUnit.SECONDS)
+public class PriceHandler extends RequestHandler { ... }
+```
+
+## Combining @Limit with other annotations
+
+`@Limit` composes naturally with `@Authenticated`, `@RolesAllowed`, and `@ApiOperation`.
+Each annotation is processed by its own processor; Flash collects all middleware and
+composes them in processor registration order.
+
+```java
+@Route(method = HttpMethod.DELETE, path = "/admin/users/{id}")
+@Limit(key = "auth_user", requests = 5, window = 1, windowUnit = TimeUnit.MINUTES)
+@RolesAllowed("admin")
+@ApiOperation(summary = "Delete a user", tags = "admin")
+public class DeleteUserHandler extends RequestHandler { ... }
+```
+
+Execution chain (outermost → handler):
+`LimiterMiddleware → OidcRolesMiddleware → DeleteUserHandler`
+
+## Fail-fast at boot
+
+If `key` names a resolver not registered in `LimiterConfig`, the server refuses to start:
+
+```
+dev.relism.exceptions.InitializationException:
+  Rate-limit resolver "auth_user" is not registered.
+  Call LimiterConfig.registerResolver("auth_user", req -> ...) before install.
+```
+
+There is no silent fallback — a misconfigured rate limit is treated as a hard error.
+
+## What happens on violation
+
+```
+HTTP/1.1 429 Too Many Requests
+X-RateLimit-Limit:     100
+X-RateLimit-Remaining: 0
+X-RateLimit-Reset:     1711750860
+Retry-After:           1
+Content-Type:          text/plain
+
+Too Many Requests
+```
+
+The handler body is never invoked. See [http-headers.md](http-headers.md) for the full
+header reference.
diff --git a/flash-extensions/flash-ext-limiter/docs/guard.md b/flash-extensions/flash-ext-limiter/docs/guard.md
new file mode 100644
index 0000000..62edb8f
--- /dev/null
+++ b/flash-extensions/flash-ext-limiter/docs/guard.md
@@ -0,0 +1,144 @@
+# Guard — programmatic rate limiting for lambda routes
+
+`Guard` is the rate-limit API for lambda (inline) route registrations. It produces
+a `Middleware` that is composed once at route-wiring time — the resolver lambda is
+captured directly into the closure, with no map lookup on the request hot-path.
+
+## Obtaining Guard
+
+`Guard` is provided in the `FlashContext` after `LimiterExtension` is installed:
+
+```java
+Guard guard = app.ctx().require(Guard.class);
+```
+
+Or inside another extension:
+
+```java
+public void install(FlashRegistrar app, FlashContext ctx) {
+    Guard guard = ctx.require(Guard.class);
+    // ...
+}
+```
+
+## API
+
+```java
+// Fixed window (default strategy)
+Middleware limit(String resolverKey, int requests, long window, TimeUnit unit)
+
+// Explicit strategy
+Middleware limit(String resolverKey, int requests, long window, TimeUnit unit, LimitStrategy strategy)
+```
+
+Both overloads:
+- Resolve the named key lambda **once** at call time (fail-fast if unknown).
+- Return a stateless `Middleware` whose closure captures the lambda and `LimitConfig` directly.
+- Share the `BucketStore` with all other rules registered through this `LimiterExtension` instance.
+
+## Examples
+
+### Simple per-IP limit on a lambda route
+
+```java
+Guard guard = app.ctx().require(Guard.class);
+
+app.get("/api/search", (req, res) -> searchService.query(req.query("q")))
+   .with(guard.limit("ip", 100, 1, TimeUnit.SECONDS));
+```
+
+### Per authenticated user — token bucket
+
+```java
+app.post("/api/export", (req, res) -> exportService.run(req))
+   .with(guard.limit("auth_user", 10, 1, TimeUnit.MINUTES, LimitStrategy.TOKEN_BUCKET));
+```
+
+### Chaining with other middleware
+
+`Guard.limit(...)` returns a plain `Middleware`, so it composes with `Middleware.of()`
+and `.andThen()` exactly like any other middleware:
+
+```java
+Middleware secured = Middleware.of(
+    guard.limit("ip", 200, 1, TimeUnit.SECONDS),   // ← outermost: runs first
+    oidc.protect()
+);
+
+app.get("/dashboard", handler).with(secured);
+```
+
+Or with `.andThen()` for two middlewares:
+
+```java
+app.get("/dashboard", handler)
+   .with(guard.limit("ip", 200, 1, TimeUnit.SECONDS).andThen(oidc.protect()));
+```
+
+### Different limits on the same path by method
+
+```java
+// Read: 500/s; Write: 20/s
+app.get("/api/items",  readHandler) .with(guard.limit("ip", 500, 1, TimeUnit.SECONDS));
+app.post("/api/items", writeHandler).with(guard.limit("ip",  20, 1, TimeUnit.SECONDS));
+```
+
+Each `.with(guard.limit(...))` call creates an independent bucket store key namespace —
+GET and POST requests to `/api/items` share the same IP bucket only if you share the same
+`Middleware` instance. Using two `guard.limit(...)` calls creates **two independent buckets**.
+
+### Reusing a middleware instance across routes
+
+To share a single bucket pool across multiple routes (treating them as one combined limit):
+
+```java
+Middleware sharedIpLimit = guard.limit("ip", 1000, 1, TimeUnit.MINUTES);
+
+app.get("/api/items",      handler1).with(sharedIpLimit);
+app.get("/api/items/{id}", handler2).with(sharedIpLimit);
+app.post("/api/items",     handler3).with(sharedIpLimit);
+```
+
+All three routes now draw from the same per-IP bucket — 1000 combined requests per minute.
+
+### Inside an extension
+
+```java
+public class MyApiExtension implements FlashExtension {
+    public void install(FlashRegistrar app, FlashContext ctx) {
+        Guard guard = ctx.require(Guard.class);  // LimiterExtension must be installed first
+
+        Middleware ipLimit = guard.limit("ip", 60, 1, TimeUnit.SECONDS);
+
+        app.get("/api/status",  statusHandler) .with(ipLimit);
+        app.get("/api/metrics", metricsHandler).with(ipLimit);
+    }
+}
+```
+
+### Large window
+
+```java
+app.get("/api/export", exportHandler)
+   .with(guard.limit("api_key", 50, 24, TimeUnit.HOURS));
+```
+
+## Fail-fast
+
+If the resolver name is not registered, `guard.limit(...)` throws immediately
+(at wiring time, not at request time):
+
+```
+InitializationException: Rate-limit resolver "auth_user" is not registered.
+```
+
+## Comparison: Guard vs @Limit
+
+| | `@Limit` | `Guard.limit(...)` |
+|---|---|---|
+| Route style | Class-based `RequestHandler` | Lambda `(req, res) -> ...` |
+| Configuration | Annotation fields | Method arguments |
+| Where resolved | `AnnotationProcessor` at `scan()` | `guard.limit(...)` call at wiring |
+| Hot-path overhead | Zero | Zero |
+| Fail-fast | Yes | Yes |
+| Composable with `Middleware.of()` | Via annotation processor order | Yes, directly |
diff --git a/flash-extensions/flash-ext-limiter/docs/http-headers.md b/flash-extensions/flash-ext-limiter/docs/http-headers.md
new file mode 100644
index 0000000..1d91443
--- /dev/null
+++ b/flash-extensions/flash-ext-limiter/docs/http-headers.md
@@ -0,0 +1,122 @@
+# HTTP headers and 429 response
+
+The extension injects standard rate-limit headers on **every** request — both allowed
+and rejected. Clients can use these headers to implement back-off logic without waiting
+for a 429.
+
+## Response headers
+
+| Header | Type | Description |
+|---|---|---|
+| `X-RateLimit-Limit` | integer | Maximum requests allowed in the current window |
+| `X-RateLimit-Remaining` | integer | Requests remaining in the current window (≥ 0) |
+| `X-RateLimit-Reset` | Unix timestamp (s) | When the quota resets or the next token arrives |
+| `Retry-After` | seconds | **Only on 429** — how long to wait before retrying (≥ 1) |
+
+### Example — allowed request
+
+```
+HTTP/1.1 200 OK
+X-RateLimit-Limit:     100
+X-RateLimit-Remaining: 73
+X-RateLimit-Reset:     1711750860
+Content-Type: application/json
+```
+
+### Example — rejected request (429)
+
+```
+HTTP/1.1 429 Too Many Requests
+X-RateLimit-Limit:     100
+X-RateLimit-Remaining: 0
+X-RateLimit-Reset:     1711750860
+Retry-After:           1
+Content-Type: text/plain
+
+Too Many Requests
+```
+
+## Header semantics by strategy
+
+### FIXED_WINDOW
+
+| Header | Value |
+|---|---|
+| `X-RateLimit-Reset` | Unix timestamp of the **next window start** (aligned to clock) |
+| `Retry-After` | Seconds until `X-RateLimit-Reset` (minimum 1) |
+
+At a 1-second window boundary `Retry-After` will typically be `1`.
+
+### TOKEN_BUCKET
+
+| Header | Value |
+|---|---|
+| `X-RateLimit-Remaining` | Current token count (may increase between requests due to refill) |
+| `X-RateLimit-Reset` | Estimated Unix timestamp when the **next token arrives** |
+| `Retry-After` | Milliseconds-precise estimate converted to seconds (minimum 1) |
+
+Because the token bucket refills continuously, `X-RateLimit-Reset` is a near-future
+timestamp rather than an aligned window boundary.
+
+## Retry-After precision
+
+`Retry-After` is computed as:
+
+```
+retryAfter = max(1, X-RateLimit-Reset - currentTimeSeconds)
+```
+
+The minimum value is always `1` second — RFC 7231 discourages `Retry-After: 0` as it
+encourages instant retry loops.
+
+## Client-side back-off example (Java)
+
+```java
+HttpResponse<String> res = client.send(request, BodyHandlers.ofString());
+
+if (res.statusCode() == 429) {
+    String retryAfter = res.headers().firstValue("Retry-After").orElse("1");
+    long waitMs = Long.parseLong(retryAfter) * 1000L;
+    Thread.sleep(waitMs);
+    // retry...
+}
+```
+
+## Client-side back-off example (JavaScript fetch)
+
+```js
+const res = await fetch('/api/search?q=flash');
+
+if (res.status === 429) {
+    const retryAfter = parseInt(res.headers.get('Retry-After') ?? '1', 10);
+    await new Promise(r => setTimeout(r, retryAfter * 1000));
+    // retry...
+}
+```
+
+## Monitoring / alerting
+
+`X-RateLimit-Remaining` can be scraped by a metrics agent to track approaching limits
+before they hit 429:
+
+- `remaining / limit < 0.1` → warning (less than 10% quota left)
+- `status == 429` → rate-limit violation counter increment
+
+If `flash-ext-limiter` is used together with a future metrics extension, the 429 rate
+per resolver key is a natural signal for abuse detection or auto-scaling.
+
+## Header injection timing
+
+Headers are injected **before** calling `next.handle(req, res)` on allowed requests,
+and **instead of** calling it on rejected requests. This means:
+
+- Handlers cannot accidentally overwrite `X-RateLimit-*` headers (they are set first,
+  but handlers that call `res.header(...)` with the same name will add a second value —
+  avoid this by not setting these headers manually).
+- On 429, the handler body is never executed — no side effects occur.
+
+## Integration with Swagger UI (flash-ext-openapi)
+
+Rate-limit headers are not currently injected into the OpenAPI spec. If you want to
+document them, add them manually via `@ApiOperation` on the handler class using the
+response headers section of the OpenAPI spec.
diff --git a/flash-extensions/flash-ext-limiter/docs/key-resolvers.md b/flash-extensions/flash-ext-limiter/docs/key-resolvers.md
new file mode 100644
index 0000000..1b39d34
--- /dev/null
+++ b/flash-extensions/flash-ext-limiter/docs/key-resolvers.md
@@ -0,0 +1,143 @@
+# Key Resolvers
+
+A **key resolver** is a lambda `Request → String` that extracts the partition key used
+to identify who a rate limit applies to. Each unique key value gets its own independent
+bucket — so `"ip"` limits per client address, `"auth_user"` limits per logged-in user, etc.
+
+## Built-in resolver: `"ip"`
+
+Always present. Cannot be removed; can be overridden with `registerResolver("ip", ...)`.
+
+Resolution order:
+1. `X-Forwarded-For` header — first address in the comma-separated list (client behind proxy)
+2. `X-Real-IP` header — single forwarded IP (nginx `proxy_set_header X-Real-IP`)
+3. `req.remoteAddress().getAddress().getHostAddress()` — direct socket address, zero allocation
+   (the `InetSocketAddress` already exists from `ServerSocket.accept()`; only `getHostAddress()`
+   allocates a String, and only when the first two headers are absent)
+4. `"unknown"` — only if `remoteAddress()` is null (test-constructed requests)
+
+```java
+// Override the built-in "ip" resolver to trust only the last hop in X-Forwarded-For
+conf.registerResolver("ip", req -> {
+    String xff = req.header("X-Forwarded-For");
+    if (xff != null) {
+        String[] parts = xff.split(",");
+        return parts[parts.length - 1].strip();   // last = most recent proxy
+    }
+    return req.header("X-Real-IP") != null ? req.header("X-Real-IP").strip() : "unknown";
+});
+```
+
+
+## Registering custom resolvers
+
+```java
+LimiterConfig conf = new LimiterConfig();
+```
+
+### By authenticated user (OIDC / ClaimsHolder)
+
+```java
+conf.registerResolver("auth_user", req ->
+    ClaimsHolder.exists() ? ClaimsHolder.user().sub() : "anonymous");
+```
+
+Requests from unauthenticated users share the `"anonymous"` bucket. If you want
+unauthenticated requests to be unlimited, pair this resolver with `@Limit` only on
+handlers that are already protected by `@Authenticated`.
+
+### By API key header
+
+```java
+conf.registerResolver("api_key", req -> {
+    String key = req.header("X-Api-Key");
+    return key != null ? key : "none";
+});
+```
+
+### By tenant (multi-tenant SaaS)
+
+```java
+conf.registerResolver("tenant", req -> {
+    // Extract from subdomain: acme.api.example.com → "acme"
+    String host = req.header("Host");
+    if (host == null) return "unknown";
+    int dot = host.indexOf('.');
+    return dot > 0 ? host.substring(0, dot) : host;
+});
+```
+
+### By IP + path (per-endpoint per-IP)
+
+Combines two dimensions into a single key string:
+
+```java
+conf.registerResolver("ip_path", req -> {
+    String ip   = req.header("X-Forwarded-For");
+    if (ip == null) ip = "unknown";
+    int comma = ip.indexOf(',');
+    if (comma > 0) ip = ip.substring(0, comma).strip();
+    return ip + "|" + req.path();
+});
+```
+
+### Composite: role-based bucket size
+
+One resolver, two different `@Limit` thresholds on two handler classes. The resolver
+returns the same key for the same user regardless of endpoint; the limit is set per handler.
+
+```java
+conf.registerResolver("auth_user", req ->
+    ClaimsHolder.exists() ? ClaimsHolder.user().sub() : "anon");
+```
+
+```java
+@Limit(key = "auth_user", requests = 1000, window = 1)   // privileged endpoint
+public class AdminReportHandler extends RequestHandler { ... }
+
+@Limit(key = "auth_user", requests = 20,   window = 1)   // public endpoint
+public class PublicSearchHandler extends RequestHandler { ... }
+```
+
+The two handlers maintain **independent buckets** for the same user — each `@Limit`
+annotation gets its own `BucketStore`.
+
+## Resolver contract
+
+```java
+@FunctionalInterface
+public interface KeyResolver {
+    String resolve(Request req);  // must never return null; return "unknown" as fallback
+}
+```
+
+- Must not return `null` — a null key will throw `NullPointerException` inside `ConcurrentHashMap`.
+- Must be **thread-safe** — called concurrently from virtual threads.
+- Should be **fast** — it runs on every request for every rate-limited route.
+- No state should be mutated — treat `Request` as read-only.
+
+## Fail-fast validation
+
+If a `@Limit` annotation or `guard.limit(...)` call references a resolver name that was never
+registered, the server **refuses to start** with `InitializationException`:
+
+```
+InitializationException: Rate-limit resolver "auth_user" is not registered.
+Call LimiterConfig.registerResolver("auth_user", req -> ...) before install.
+```
+
+This check happens at boot time (annotation processor / Guard wiring), not at request time.
+
+## Registration API
+
+```java
+LimiterConfig conf = new LimiterConfig()
+    .registerResolver("auth_user", req -> ...)
+    .registerResolver("tenant",    req -> ...)
+    .registerResolver("api_key",   req -> ...);
+
+app.install(new LimiterExtension(conf));
+```
+
+`registerResolver` returns `this` for fluent chaining. Calling it with an existing name
+**replaces** the previous resolver — this is how you override the built-in `"ip"` resolver.
diff --git a/flash-extensions/flash-ext-limiter/docs/strategies.md b/flash-extensions/flash-ext-limiter/docs/strategies.md
new file mode 100644
index 0000000..6420e7a
--- /dev/null
+++ b/flash-extensions/flash-ext-limiter/docs/strategies.md
@@ -0,0 +1,178 @@
+# Rate-limit strategies
+
+Two algorithms are built in. Both are lock-free (CAS-only), operate on pre-allocated
+`Bucket` state, and write results into a caller-supplied `long[2]` — zero per-request allocation.
+
+## FIXED_WINDOW
+
+```java
+@Limit(strategy = LimitStrategy.FIXED_WINDOW, ...)   // default, can be omitted
+guard.limit("ip", 100, 1, TimeUnit.SECONDS)           // default
+```
+
+### How it works
+
+The request counter resets to zero at each clock-aligned window boundary.
+
+```
+ window 1         window 2         window 3
+|────────────────|────────────────|────────────────|
+ cnt: 0 1 2 … N  cnt: 0 1 2 … N  cnt: 0 1 2 … N
+```
+
+With `requests = 100, window = 1s`:
+- Requests 1–100 in a given second → allowed
+- Request 101+ in that second → 429, allowed again at second +1
+
+### Implementation
+
+All state is packed into a single `AtomicLong` (`Bucket.slot0`):
+
+```
+high 32 bits = reduced epoch  = (currentTimeMs / windowMs) & 0xFFFFFFFF
+low  32 bits = request count in the current window
+```
+
+One CAS operation per request. At a window boundary the same CAS atomically resets the
+counter to 1. No locks, no additional fields.
+
+### Burst behaviour
+
+Because the window is fixed to the clock, a burst can occur at the boundary:
+up to `N` requests at the end of window 1 followed immediately by `N` requests at the
+start of window 2 → `2N` requests in a short interval.
+
+```
+   window 1  │  window 2
+ ────────────┼────────────
+  99 100 101 │ 1  2  3  4
+             ↑ reset: 101 → 429, then 1 is allowed
+```
+
+If burst tolerance is unacceptable, use `TOKEN_BUCKET`.
+
+### When to use
+
+- Simple API rate limiting where occasional boundary bursts are acceptable.
+- Scenarios where a hard "N requests per clock second/minute" guarantee matters.
+- When you want minimal per-bucket memory (one `AtomicLong`, `Bucket.slot1` unused).
+
+---
+
+## TOKEN_BUCKET
+
+```java
+@Limit(strategy = LimitStrategy.TOKEN_BUCKET, ...)
+guard.limit("ip", 100, 1, TimeUnit.SECONDS, LimitStrategy.TOKEN_BUCKET)
+```
+
+### How it works
+
+The bucket holds up to `requests` tokens and refills at a continuous rate of
+`requests / window` tokens per millisecond. Each request consumes one token.
+A client that was idle accumulates tokens and can fire a burst, but sustained
+excess traffic drains the bucket and triggers 429s.
+
+```
+tokens
+  N ─┐           ┌──── refill slope ────┐
+     │           │                      │
+  0  └───────────┘ ←─ burst consumed ──→│
+      burst here    429s during drain   recovery
+```
+
+### Refill rate
+
+`refillPerMs = (requests × 1000) / windowMs`  (integer, minimum 1)
+
+For `requests = 100, window = 1s`:
+- Refill rate: 100 tokens/s = 1 token/10 ms
+- Max capacity: 100 tokens
+- A client idle for 500 ms accumulates 50 tokens and can fire 50 requests instantly.
+
+### Implementation
+
+- `Bucket.slot0` — current tokens × 1000 (fixed-point, avoids floating-point math)
+- `Bucket.slot1` — last-refill timestamp in ms (0 = uninitialised → bucket starts full)
+
+One CAS loop on `slot0` per request; `slot1` updated best-effort after CAS success.
+The bounded inaccuracy from the non-atomic dual update is at most a few nanoseconds —
+negligible and self-correcting for rate limiting.
+
+### Bucket starts full
+
+On the very first request, `slot1 == 0`. The strategy treats this as "one full window
+elapsed" → `currentTokens = max`. The bucket starts at capacity; no warm-up needed.
+
+### When to use
+
+- APIs where clients legitimately batch requests (analytics, bulk imports).
+- Endpoints where smooth throughput matters more than hard per-second guarantees.
+- Any scenario where `FIXED_WINDOW` boundary bursts would be problematic.
+
+---
+
+## Comparison
+
+| | `FIXED_WINDOW` | `TOKEN_BUCKET` |
+|---|---|---|
+| Algorithm | Aligned counter reset | Continuous token refill |
+| Burst handling | Allows 2× limit at boundaries | Absorbs bursts up to bucket capacity |
+| Memory per bucket | 1 × `AtomicLong` used | 2 × `AtomicLong` used |
+| Clock alignment | Yes (predictable resets) | No (smooth) |
+| Typical use case | Simple request quotas | APIs with legitimate burst patterns |
+| CAS operations per request | 1 (usually) | 1 (usually) |
+
+Both strategies use the same `Bucket` type. Both are lock-free and allocation-free after
+the bucket is first created.
+
+---
+
+## Adding a custom strategy
+
+Implement `RateLimitStrategy` and wrap it in a `LimitStrategy` enum constant:
+
+```java
+// 1. Implement the strategy
+public final class SlidingWindowStrategy implements RateLimitStrategy {
+    @Override
+    public boolean check(Bucket bucket, LimitConfig cfg, long[] out) {
+        // ... lock-free implementation using bucket.slot0 / slot1
+        return allowed;
+    }
+}
+
+// 2. Add to the enum
+public enum LimitStrategy {
+    FIXED_WINDOW { ... },
+    TOKEN_BUCKET { ... },
+    SLIDING_WINDOW {
+        @Override
+        public RateLimitStrategy create() { return new SlidingWindowStrategy(); }
+    };
+    public abstract RateLimitStrategy create();
+}
+```
+
+The new strategy is immediately available to `@Limit(strategy = LimitStrategy.SLIDING_WINDOW)`
+and `guard.limit("ip", 100, 1, SECONDS, LimitStrategy.SLIDING_WINDOW)`.
+
+### Strategy contract
+
+```java
+public interface RateLimitStrategy {
+    /**
+     * @param bucket  pre-allocated per-key state (never null)
+     * @param cfg     immutable rule config (limit, windowMs)
+     * @param out     out[0] = remaining, out[1] = reset epoch-seconds
+     * @return true = allowed, false = rejected (429)
+     */
+    boolean check(Bucket bucket, LimitConfig cfg, long[] out);
+}
+```
+
+Requirements for custom implementations:
+- **Lock-free** — use `AtomicLong.compareAndSet`; no `synchronized` or `ReentrantLock`.
+- **Stateless** — all mutable state must live in `Bucket.slot0` / `Bucket.slot1`.
+- **No allocation** — `out[]` is the only output channel; do not create objects on the hot path.
+- **Thread-safe** — called concurrently from many virtual threads.
diff --git a/flash-extensions/flash-ext-limiter/pom.xml b/flash-extensions/flash-ext-limiter/pom.xml
new file mode 100644
index 0000000..534cc87
--- /dev/null
+++ b/flash-extensions/flash-ext-limiter/pom.xml
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>dev.relism</groupId>
+        <artifactId>flash-extensions</artifactId>
+        <version>1.0-SNAPSHOT</version>
+    </parent>
+
+    <artifactId>flash-ext-limiter</artifactId>
+
+    <dependencies>
+        <dependency>
+            <groupId>dev.relism</groupId>
+            <artifactId>flash</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter</artifactId>
+        </dependency>
+    </dependencies>
+
+</project>
diff --git a/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/Bucket.java b/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/Bucket.java
new file mode 100644
index 0000000..89cfbce
--- /dev/null
+++ b/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/Bucket.java
@@ -0,0 +1,22 @@
+package dev.relism.ext.limiter;
+
+import java.util.concurrent.atomic.AtomicLong;
+
+/**
+ * Pre-allocated per-key rate limit state. Holds two {@link AtomicLong} slots whose
+ * semantics are strategy-specific:
+ *
+ * <ul>
+ *   <li><b>FIXED_WINDOW</b>: {@code slot0} = packed {@code (epoch << 32 | count)},
+ *       {@code slot1} unused.</li>
+ *   <li><b>TOKEN_BUCKET</b>: {@code slot0} = tokens × 1000 (scaled),
+ *       {@code slot1} = last-refill timestamp (ms since epoch).</li>
+ * </ul>
+ *
+ * <p>Buckets are created once per unique key (via {@link BucketStore}) and reused
+ * for the lifetime of the server — zero allocation on the warm path.
+ */
+public final class Bucket {
+    public final AtomicLong slot0 = new AtomicLong(0L);
+    public final AtomicLong slot1 = new AtomicLong(0L);
+}
diff --git a/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/BucketStore.java b/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/BucketStore.java
new file mode 100644
index 0000000..ad43b12
--- /dev/null
+++ b/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/BucketStore.java
@@ -0,0 +1,28 @@
+package dev.relism.ext.limiter;
+
+import java.util.concurrent.ConcurrentHashMap;
+
+/**
+ * Thread-safe store of pre-allocated {@link Bucket} instances keyed by partition key.
+ *
+ * <p>On the warm path (key already seen), {@link #get} performs a single
+ * {@link ConcurrentHashMap} lookup — no allocation. On the cold path (new key),
+ * {@code computeIfAbsent} allocates exactly one {@link Bucket} and inserts it.
+ *
+ * <p>Buckets accumulate indefinitely; for workloads with unbounded unique keys
+ * (e.g. one-shot crawlers), consider periodic store replacement or a bounded
+ * LRU map implementation.
+ */
+public final class BucketStore {
+
+    private final ConcurrentHashMap<String, Bucket> map = new ConcurrentHashMap<>();
+
+    /**
+     * Returns the bucket for {@code key}, creating one if absent.
+     * Two threads racing on the same new key are guaranteed to receive the same bucket instance.
+     */
+    public Bucket get(String key) {
+        Bucket b = map.get(key);
+        return b != null ? b : map.computeIfAbsent(key, k -> new Bucket());
+    }
+}
diff --git a/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/Guard.java b/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/Guard.java
new file mode 100644
index 0000000..a43348a
--- /dev/null
+++ b/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/Guard.java
@@ -0,0 +1,69 @@
+package dev.relism.ext.limiter;
+
+import dev.relism.routing.Middleware;
+
+import java.util.concurrent.TimeUnit;
+
+/**
+ * Manual rate-limit guard for lambda routes.
+ *
+ * <p>Available via {@link dev.relism.extension.FlashContext}:
+ * <pre>{@code
+ * Guard guard = ctx.require(Guard.class);
+ * }</pre>
+ *
+ * <p>{@link #limit} creates a {@link Middleware} that is composed once at route registration
+ * time — the resolver lambda is captured directly from the registry (no runtime map lookup):
+ * <pre>{@code
+ * // 50 req/s per IP — fixed window (default)
+ * app.get("/api/search", handler)
+ *    .with(guard.limit("ip", 50, 1, TimeUnit.SECONDS));
+ *
+ * // 10 req/min per authenticated user — token bucket
+ * app.post("/api/export", handler)
+ *    .with(guard.limit("auth_user", 10, 1, TimeUnit.MINUTES, LimitStrategy.TOKEN_BUCKET));
+ * }</pre>
+ *
+ * <p>The resolver name is looked up once here (at {@code .with(guard.limit(...))} call time,
+ * i.e. during app wiring, not on each request). If the name is not registered,
+ * {@link dev.relism.exceptions.InitializationException} is thrown immediately.
+ */
+public final class Guard {
+
+    private final LimiterConfig config;
+    private final BucketStore   store;
+
+    Guard(LimiterConfig config, BucketStore store) {
+        this.config = config;
+        this.store  = store;
+    }
+
+    /**
+     * Returns a {@link Middleware} that enforces the given rate limit using
+     * {@link LimitStrategy#FIXED_WINDOW}.
+     *
+     * @param resolverKey name registered via {@link LimiterConfig#registerResolver}
+     * @param requests    maximum requests allowed per window
+     * @param window      window duration in {@code unit}
+     * @param unit        time unit for {@code window}
+     */
+    public Middleware limit(String resolverKey, int requests, long window, TimeUnit unit) {
+        return limit(resolverKey, requests, window, unit, LimitStrategy.FIXED_WINDOW);
+    }
+
+    /**
+     * Returns a {@link Middleware} that enforces the given rate limit with the specified strategy.
+     *
+     * @param resolverKey name registered via {@link LimiterConfig#registerResolver}
+     * @param requests    maximum requests allowed per window
+     * @param window      window duration in {@code unit}
+     * @param unit        time unit for {@code window}
+     * @param strategy    rate-limit algorithm
+     */
+    public Middleware limit(String resolverKey, int requests, long window, TimeUnit unit, LimitStrategy strategy) {
+        // Fail-fast: resolve the lambda at wiring time, not at request time.
+        KeyResolver resolver = config.requireResolver(resolverKey);
+        LimitConfig cfg      = new LimitConfig(requests, unit.toMillis(window), strategy.create());
+        return LimiterExtension.buildMiddleware(resolver, cfg, store);
+    }
+}
diff --git a/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/KeyResolver.java b/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/KeyResolver.java
new file mode 100644
index 0000000..ef4bb06
--- /dev/null
+++ b/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/KeyResolver.java
@@ -0,0 +1,20 @@
+package dev.relism.ext.limiter;
+
+import dev.relism.models.Request;
+
+/**
+ * Extracts a partition key from an incoming request.
+ *
+ * <p>The resolved key identifies who the rate limit applies to — an IP address,
+ * an authenticated user ID, an API key, etc. Implementations are captured once
+ * at route registration time and called directly (no registry lookup) on every request.
+ *
+ * <pre>{@code
+ * conf.registerResolver("ip",       req -> req.header("X-Forwarded-For"));
+ * conf.registerResolver("auth_user", req -> ClaimsHolder.user().sub());
+ * }</pre>
+ */
+@FunctionalInterface
+public interface KeyResolver {
+    String resolve(Request req);
+}
diff --git a/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/Limit.java b/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/Limit.java
new file mode 100644
index 0000000..ea4b484
--- /dev/null
+++ b/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/Limit.java
@@ -0,0 +1,45 @@
+package dev.relism.ext.limiter;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * Applies a rate limit to a class-based {@link dev.relism.models.RequestHandler}.
+ *
+ * <p>The annotation is processed at boot time by the {@link LimiterExtension} annotation
+ * processor. If {@link #key()} names a resolver that was never registered,
+ * startup fails immediately with {@link dev.relism.exceptions.InitializationException}.
+ *
+ * <pre>{@code
+ * // 100 req/s per client IP — fixed window
+ * @Limit(requests = 100, window = 1)
+ * public class SearchHandler extends RequestHandler { ... }
+ *
+ * // 20 req/min per authenticated user — token bucket
+ * @Limit(key = "auth_user", requests = 20, window = 1, windowUnit = TimeUnit.MINUTES,
+ *        strategy = LimitStrategy.TOKEN_BUCKET)
+ * public class ExpensiveHandler extends RequestHandler { ... }
+ * }</pre>
+ */
+@Target(ElementType.TYPE)
+@Retention(RetentionPolicy.RUNTIME)
+public @interface Limit {
+
+    /** Name of the resolver registered via {@link LimiterConfig#registerResolver}. Default: {@code "ip"}. */
+    String key() default "ip";
+
+    /** Maximum number of requests allowed per {@link #window()}. */
+    int requests();
+
+    /** Window duration in {@link #windowUnit()} units. */
+    long window();
+
+    /** Unit for {@link #window()}. Default: {@link TimeUnit#SECONDS}. */
+    TimeUnit windowUnit() default TimeUnit.SECONDS;
+
+    /** Rate-limit algorithm. Default: {@link LimitStrategy#FIXED_WINDOW}. */
+    LimitStrategy strategy() default LimitStrategy.FIXED_WINDOW;
+}
diff --git a/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/LimitConfig.java b/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/LimitConfig.java
new file mode 100644
index 0000000..2e63f19
--- /dev/null
+++ b/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/LimitConfig.java
@@ -0,0 +1,11 @@
+package dev.relism.ext.limiter;
+
+/**
+ * Immutable configuration snapshot for a single rate-limit rule.
+ * Created once at boot time and captured directly in the middleware closure.
+ *
+ * @param limit      Maximum allowed requests per window.
+ * @param windowMs   Window duration in milliseconds.
+ * @param strategy   Strategy instance bound to this rule (one per rule, not shared).
+ */
+public record LimitConfig(int limit, long windowMs, RateLimitStrategy strategy) {}
diff --git a/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/LimitStrategy.java b/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/LimitStrategy.java
new file mode 100644
index 0000000..668f69b
--- /dev/null
+++ b/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/LimitStrategy.java
@@ -0,0 +1,45 @@
+package dev.relism.ext.limiter;
+
+import dev.relism.ext.limiter.strategy.FixedWindowStrategy;
+import dev.relism.ext.limiter.strategy.TokenBucketStrategy;
+
+/**
+ * Enumeration of built-in rate-limit algorithms. Each constant is a factory
+ * for its corresponding {@link RateLimitStrategy} implementation.
+ *
+ * <p>New algorithms can be added here without touching the rest of the extension.
+ * The enum value is referenced by {@link Limit#strategy()} so user code refers
+ * to the algorithm by name ({@code LimitStrategy.FIXED_WINDOW}) rather than
+ * instantiating strategy objects directly.
+ *
+ * <pre>{@code
+ * @Limit(key = "ip", requests = 100, window = 1, strategy = LimitStrategy.TOKEN_BUCKET)
+ * public class SearchHandler extends RequestHandler { ... }
+ * }</pre>
+ */
+public enum LimitStrategy {
+
+    /**
+     * Fixed-window counter: resets to zero at each clock-aligned window boundary.
+     * Simple, minimal memory, but allows up to 2× the limit in bursts that straddle
+     * two windows.
+     */
+    FIXED_WINDOW {
+        @Override
+        public RateLimitStrategy create() { return new FixedWindowStrategy(); }
+    },
+
+    /**
+     * Token-bucket: tokens refill continuously. Smooth burst absorption — a client
+     * that was idle accumulates tokens and can fire a short burst, but sustained
+     * excess traffic is rejected. Preferred for API endpoints where occasional bursts
+     * are legitimate.
+     */
+    TOKEN_BUCKET {
+        @Override
+        public RateLimitStrategy create() { return new TokenBucketStrategy(); }
+    };
+
+    /** Creates a fresh, stateless {@link RateLimitStrategy} instance for this algorithm. */
+    public abstract RateLimitStrategy create();
+}
diff --git a/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/LimiterConfig.java b/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/LimiterConfig.java
new file mode 100644
index 0000000..c2cb1c5
--- /dev/null
+++ b/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/LimiterConfig.java
@@ -0,0 +1,82 @@
+package dev.relism.ext.limiter;
+
+import dev.relism.exceptions.InitializationException;
+
+import java.net.InetSocketAddress;
+import java.util.LinkedHashMap;
+import java.util.Map;
+
+/**
+ * Extension configuration: holds the named {@link KeyResolver} registry.
+ *
+ * <p>Resolvers are registered during the <em>config phase</em> (before {@code install}).
+ * After {@link LimiterExtension#install} is called, the registry is consulted once per
+ * route/handler at boot to capture the resolver lambda directly into the middleware closure.
+ * There is no map lookup on the request hot-path.
+ *
+ * <p>The built-in {@code "ip"} resolver is always present and extracts the client IP from
+ * {@code X-Forwarded-For} (first address) or {@code X-Real-IP}. Override it with
+ * {@code registerResolver("ip", ...)} if needed.
+ *
+ * <pre>{@code
+ * LimiterConfig conf = new LimiterConfig()
+ *     .registerResolver("auth_user", req -> {
+ *         // custom logic — e.g. extract sub from ClaimsHolder
+ *         return ClaimsHolder.exists() ? ClaimsHolder.user().sub() : "anonymous";
+ *     });
+ *
+ * app.install(new LimiterExtension(conf));
+ * }</pre>
+ */
+public final class LimiterConfig {
+
+    private final Map<String, KeyResolver> resolvers = new LinkedHashMap<>();
+
+    public LimiterConfig() {
+        // Built-in mandatory "ip" resolver.
+        // Resolution order (standard reverse-proxy chain):
+        //   1. X-Forwarded-For — first address (client behind one or more proxies)
+        //   2. X-Real-IP       — single forwarded IP (nginx proxy_set_header X-Real-IP)
+        //   3. Socket address  — direct connection, no proxy headers (zero alloc: the
+        //                        InetSocketAddress already exists from accept(); only
+        //                        getHostAddress() allocates a String, and only when reached)
+        resolvers.put("ip", req -> {
+            String xff = req.header("X-Forwarded-For");
+            if (xff != null) {
+                int comma = xff.indexOf(',');
+                return comma > 0 ? xff.substring(0, comma).strip() : xff.strip();
+            }
+            String xri = req.header("X-Real-IP");
+            if (xri != null) return xri.strip();
+            InetSocketAddress addr = req.remoteAddress();
+            return addr != null ? addr.getAddress().getHostAddress() : "unknown";
+        });
+    }
+
+    /**
+     * Registers (or replaces) a named key resolver. Returns {@code this} for fluent chaining.
+     *
+     * @param name     identifier referenced by {@link Limit#key()} and {@link Guard#limit}
+     * @param resolver lambda that extracts the partition key from a request
+     */
+    public LimiterConfig registerResolver(String name, KeyResolver resolver) {
+        if (name == null || name.isBlank()) throw new IllegalArgumentException("Resolver name must not be blank");
+        if (resolver == null)               throw new IllegalArgumentException("Resolver must not be null");
+        resolvers.put(name, resolver);
+        return this;
+    }
+
+    /**
+     * Returns the resolver for {@code name}.
+     *
+     * @throws InitializationException if no resolver with that name has been registered —
+     *         checked at boot time so misconfigurations surface immediately.
+     */
+    KeyResolver requireResolver(String name) {
+        KeyResolver r = resolvers.get(name);
+        if (r == null) throw new InitializationException(
+                "Rate-limit resolver \"" + name + "\" is not registered. " +
+                "Call LimiterConfig.registerResolver(\"" + name + "\", req -> ...) before install.");
+        return r;
+    }
+}
diff --git a/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/LimiterExtension.java b/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/LimiterExtension.java
new file mode 100644
index 0000000..c025886
--- /dev/null
+++ b/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/LimiterExtension.java
@@ -0,0 +1,130 @@
+package dev.relism.ext.limiter;
+
+import dev.relism.extension.FlashContext;
+import dev.relism.extension.FlashExtension;
+import dev.relism.extension.FlashRegistrar;
+import dev.relism.http.HttpStatus;
+import dev.relism.routing.Middleware;
+
+import java.util.List;
+
+/**
+ * Rate-limiting extension for Flash.
+ *
+ * <p>On {@link #install}:
+ * <ol>
+ *   <li>Creates a single {@link BucketStore} shared by all rules in this extension instance.</li>
+ *   <li>Provides a {@link Guard} in the {@link FlashContext} for manual use on lambda routes.</li>
+ *   <li>Registers an {@link dev.relism.extension.AnnotationProcessor} for {@link Limit}:
+ *       reads the annotation once per handler class at boot, resolves the key lambda
+ *       from the registry <em>fail-fast</em>, then returns a pre-compiled middleware
+ *       that captures the lambda and config directly — zero map lookups at request time.</li>
+ * </ol>
+ *
+ * <h3>Annotation-based (class handlers)</h3>
+ * <pre>{@code
+ * @Limit(requests = 100, window = 1)                          // 100 req/s per IP
+ * public class SearchHandler extends RequestHandler { ... }
+ *
+ * @Limit(key = "auth_user", requests = 20, window = 1,
+ *        windowUnit = TimeUnit.MINUTES,
+ *        strategy   = LimitStrategy.TOKEN_BUCKET)
+ * public class ReportHandler extends RequestHandler { ... }
+ * }</pre>
+ *
+ * <h3>Lambda routes (via Guard)</h3>
+ * <pre>{@code
+ * LimiterConfig conf = new LimiterConfig()
+ *     .registerResolver("auth_user", req -> ClaimsHolder.user().sub());
+ *
+ * app.install(new LimiterExtension(conf));
+ *
+ * Guard guard = app.ctx().require(Guard.class);
+ * app.get("/api/search", handler).with(guard.limit("ip", 50, 1, TimeUnit.SECONDS));
+ * }</pre>
+ *
+ * <h3>Installation order matters</h3>
+ * Install {@code LimiterExtension} <em>before</em> authentication extensions so that
+ * rate-limit checks short-circuit before expensive token validation on over-limit requests.
+ */
+public final class LimiterExtension implements FlashExtension {
+
+    private final LimiterConfig config;
+
+    /** Installs with default config (only the built-in {@code "ip"} resolver). */
+    public LimiterExtension() {
+        this(new LimiterConfig());
+    }
+
+    /** Installs with a custom {@link LimiterConfig} (custom resolvers, etc.). */
+    public LimiterExtension(LimiterConfig config) {
+        this.config = config;
+    }
+
+    @Override
+    public void install(FlashRegistrar app, FlashContext ctx) {
+        BucketStore store = new BucketStore();
+        Guard       guard = new Guard(config, store);
+
+        ctx.provide(Guard.class,        guard);
+        ctx.provide(LimiterConfig.class, config);
+
+        // Annotation processor: runs once per class-based handler at boot.
+        ctx.addAnnotationProcessor(handlerClass -> {
+            Limit ann = handlerClass.getAnnotation(Limit.class);
+            if (ann == null) return List.of();
+
+            // Fail-fast: if the key is unknown the server refuses to start.
+            KeyResolver resolver = config.requireResolver(ann.key());
+            LimitConfig cfg      = new LimitConfig(
+                    ann.requests(),
+                    ann.windowUnit().toMillis(ann.window()),
+                    ann.strategy().create()
+            );
+
+            return List.of(buildMiddleware(resolver, cfg, store));
+        });
+    }
+
+    // ── Package-private helper — shared with Guard ────────────────────────────
+
+    /**
+     * Builds the rate-limit {@link Middleware} from an already-resolved resolver lambda.
+     *
+     * <p>Hot-path design:
+     * <ul>
+     *   <li>{@code resolver} is captured directly in the closure — no registry lookup per request.</li>
+     *   <li>{@code resultBuf} is a per-{@link Middleware}-instance ThreadLocal {@code long[2]}.
+     *       Allocated once per thread, reused forever — zero per-request allocation.</li>
+     *   <li>Header values ({@code String.valueOf(...)}) are the only unavoidable allocations;
+     *       they are tiny and bounded.</li>
+     * </ul>
+     */
+    static Middleware buildMiddleware(KeyResolver resolver, LimitConfig cfg, BucketStore store) {
+        // One result buffer per thread, per middleware instance.
+        // ThreadLocal is captured in the closure at boot time — not re-created per request.
+        ThreadLocal<long[]> resultBuf = ThreadLocal.withInitial(() -> new long[2]);
+
+        return next -> (req, res) -> {
+            String key    = resolver.resolve(req);
+            Bucket bucket = store.get(key);
+            long[] out    = resultBuf.get();
+
+            boolean allowed = cfg.strategy().check(bucket, cfg, out);
+
+            // Always inject rate-limit headers — useful even on allowed requests.
+            res.header("X-RateLimit-Limit",     String.valueOf(cfg.limit()));
+            res.header("X-RateLimit-Remaining", String.valueOf(out[0]));
+            res.header("X-RateLimit-Reset",     String.valueOf(out[1]));
+
+            if (!allowed) {
+                long retryAfter = Math.max(1L, out[1] - System.currentTimeMillis() / 1000L);
+                res.status(HttpStatus.TOO_MANY_REQUESTS)
+                   .header("Retry-After", String.valueOf(retryAfter));
+                return "Too Many Requests";
+            }
+
+            return next.handle(req, res);
+        };
+    }
+}
diff --git a/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/RateLimitStrategy.java b/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/RateLimitStrategy.java
new file mode 100644
index 0000000..3434f49
--- /dev/null
+++ b/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/RateLimitStrategy.java
@@ -0,0 +1,34 @@
+package dev.relism.ext.limiter;
+
+/**
+ * Contract for a rate-limit algorithm. Implementations must be:
+ * <ul>
+ *   <li><b>Lock-free</b> — rely only on {@link java.util.concurrent.atomic.AtomicLong} CAS operations.</li>
+ *   <li><b>Stateless</b> — all mutable state lives in the {@link Bucket}; the strategy itself
+ *       holds no instance fields so the same object can be shared across threads and rules.</li>
+ * </ul>
+ *
+ * <p>Called on every request — must not allocate on the hot path.
+ *
+ * @see dev.relism.ext.limiter.strategy.FixedWindowStrategy
+ * @see dev.relism.ext.limiter.strategy.TokenBucketStrategy
+ */
+public interface RateLimitStrategy {
+
+    /**
+     * Checks whether this request is within the limit and updates the bucket atomically.
+     *
+     * <p>On return, {@code out} contains:
+     * <ul>
+     *   <li>{@code out[0]} — remaining allowed requests in the current window (≥ 0).</li>
+     *   <li>{@code out[1]} — Unix epoch seconds at which the quota resets (for {@code X-RateLimit-Reset}
+     *       and {@code Retry-After} headers).</li>
+     * </ul>
+     *
+     * @param bucket  per-key state carrier (pre-allocated, never null)
+     * @param cfg     immutable rule configuration
+     * @param out     caller-supplied two-element array; values are overwritten on every call
+     * @return {@code true} if the request is within the limit and should proceed
+     */
+    boolean check(Bucket bucket, LimitConfig cfg, long[] out);
+}
diff --git a/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/strategy/FixedWindowStrategy.java b/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/strategy/FixedWindowStrategy.java
new file mode 100644
index 0000000..179aa85
--- /dev/null
+++ b/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/strategy/FixedWindowStrategy.java
@@ -0,0 +1,54 @@
+package dev.relism.ext.limiter.strategy;
+
+import dev.relism.ext.limiter.Bucket;
+import dev.relism.ext.limiter.LimitConfig;
+import dev.relism.ext.limiter.RateLimitStrategy;
+
+/**
+ * Fixed-window rate limit: allows up to {@link LimitConfig#limit()} requests per window of
+ * {@link LimitConfig#windowMs()} milliseconds. The window is aligned to clock time
+ * (e.g. 10:00:00 – 10:00:59 for a 60-second window), not sliding.
+ *
+ * <h3>Implementation</h3>
+ * The entire state fits in a single {@link java.util.concurrent.atomic.AtomicLong}
+ * ({@link Bucket#slot0}), packed as:
+ * <pre>
+ *   high 32 bits = reduced epoch  (currentTimeMs / windowMs) & 0xFFFFFFFFL
+ *   low  32 bits = request count in the current window
+ * </pre>
+ * Each request performs a single CAS loop — no locks, no allocations.
+ * At a window boundary the CAS atomically resets the counter to 1.
+ *
+ * <p>The reduced epoch wraps every {@code 2^32 × windowMs} milliseconds
+ * (~13,000 years for a 100 ms window) — collision-free in practice.
+ */
+public final class FixedWindowStrategy implements RateLimitStrategy {
+
+    @Override
+    public boolean check(Bucket bucket, LimitConfig cfg, long[] out) {
+        long now       = System.currentTimeMillis();
+        long absEpoch  = now / cfg.windowMs();
+        int  epoch     = (int)(absEpoch & 0xFFFFFFFFL);  // reduced epoch, collision-safe
+
+        while (true) {
+            long packed      = bucket.slot0.get();
+            int  storedEpoch = (int)(packed >>> 32);
+            int  count       = (int)(packed & 0xFFFFFFFFL);
+
+            // Same window: increment; new window: reset to 1.
+            // Cap at limit+1 to guard against int overflow on extreme traffic.
+            int newCount = (storedEpoch == epoch)
+                    ? Math.min(count + 1, cfg.limit() + 1)
+                    : 1;
+
+            long newPacked = ((long) epoch << 32) | (newCount & 0xFFFFFFFFL);
+
+            if (bucket.slot0.compareAndSet(packed, newPacked)) {
+                out[0] = Math.max(0L, cfg.limit() - newCount);
+                out[1] = (absEpoch + 1) * cfg.windowMs() / 1000L;
+                return newCount <= cfg.limit();
+            }
+            // CAS lost — contention; re-read and retry.
+        }
+    }
+}
diff --git a/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/strategy/TokenBucketStrategy.java b/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/strategy/TokenBucketStrategy.java
new file mode 100644
index 0000000..f77545a
--- /dev/null
+++ b/flash-extensions/flash-ext-limiter/src/main/java/dev/relism/ext/limiter/strategy/TokenBucketStrategy.java
@@ -0,0 +1,69 @@
+package dev.relism.ext.limiter.strategy;
+
+import dev.relism.ext.limiter.Bucket;
+import dev.relism.ext.limiter.LimitConfig;
+import dev.relism.ext.limiter.RateLimitStrategy;
+
+/**
+ * Token-bucket rate limit: tokens refill continuously at a rate of
+ * {@code limit / windowMs} tokens per millisecond, up to a maximum of {@code limit} tokens.
+ * Each request consumes one token. Burst traffic is absorbed until the bucket empties.
+ *
+ * <h3>Implementation</h3>
+ * <ul>
+ *   <li>{@link Bucket#slot0} — current token count scaled by {@value #SCALE}
+ *       (allows sub-token precision without floating-point). Starts at 0; treated as
+ *       {@code maxScaled} when {@link Bucket#slot1} is 0 (first call → bucket starts full).</li>
+ *   <li>{@link Bucket#slot1} — last-refill timestamp in ms. 0 = not yet initialised.</li>
+ * </ul>
+ *
+ * <p>Each request CAS-loops on {@code slot0}; {@code slot1} is updated best-effort after a
+ * successful CAS. The resulting inaccuracy is bounded by the nanoseconds between the CAS
+ * and the {@code set} — negligible and self-correcting for rate limiting purposes.
+ */
+public final class TokenBucketStrategy implements RateLimitStrategy {
+
+    /** Fixed-point scale factor. Stored tokens = actual tokens × SCALE. */
+    static final long SCALE = 1_000L;
+
+    @Override
+    public boolean check(Bucket bucket, LimitConfig cfg, long[] out) {
+        long now       = System.currentTimeMillis();
+        long maxScaled = (long) cfg.limit() * SCALE;
+        // Refill rate: limit tokens per windowMs → (limit * SCALE) / windowMs scaled-tokens per ms.
+        // Minimum 1 to ensure progress even for very large windows.
+        long rfPerMs   = Math.max(1L, maxScaled / cfg.windowMs());
+
+        while (true) {
+            long lastMs    = bucket.slot1.get();
+            long rawTokens = bucket.slot0.get();
+
+            // When slot1 == 0 the bucket has never been used: treat as one full window elapsed
+            // so the bucket starts completely full.
+            long elapsed       = (lastMs == 0L) ? cfg.windowMs() : Math.max(0L, now - lastMs);
+            long currentTokens = Math.min(maxScaled, rawTokens + elapsed * rfPerMs);
+
+            if (currentTokens < SCALE) {
+                // Not enough for one token — compute when the next token arrives.
+                long needed   = SCALE - currentTokens;
+                long msToNext = (needed + rfPerMs - 1) / rfPerMs; // ceiling division
+                out[0] = 0L;
+                out[1] = (now + msToNext) / 1000L;
+                // Best-effort: advance the refill baseline so the next call gets a fresh elapsed.
+                bucket.slot0.compareAndSet(rawTokens, currentTokens);
+                bucket.slot1.compareAndSet(lastMs, now);
+                return false;
+            }
+
+            long newTokens = currentTokens - SCALE;
+            if (bucket.slot0.compareAndSet(rawTokens, newTokens)) {
+                // Consumed successfully. Update refill baseline best-effort.
+                bucket.slot1.set(now);
+                out[0] = newTokens / SCALE;
+                out[1] = now / 1000L;
+                return true;
+            }
+            // CAS lost — another thread consumed a token concurrently; re-read and retry.
+        }
+    }
+}
diff --git a/flash-extensions/flash-ext-oidc/src/main/java/dev/relism/ext/oidc/OidcExtension.java b/flash-extensions/flash-ext-oidc/src/main/java/dev/relism/ext/oidc/OidcExtension.java
index 45c7648..9ac0a66 100644
--- a/flash-extensions/flash-ext-oidc/src/main/java/dev/relism/ext/oidc/OidcExtension.java
+++ b/flash-extensions/flash-ext-oidc/src/main/java/dev/relism/ext/oidc/OidcExtension.java
@@ -1,6 +1,6 @@
 package dev.relism.ext.oidc;
 
-import dev.relism.extension.ExtensionContext;
+import dev.relism.extension.FlashContext;
 import dev.relism.extension.FlashExtension;
 import dev.relism.extension.FlashRegistrar;
 
@@ -59,7 +59,7 @@ public class OidcExtension implements FlashExtension {
     }
 
     @Override
-    public void install(FlashRegistrar app, ExtensionContext ctx) {
+    public void install(FlashRegistrar app, FlashContext ctx) {
 
         // 1. Build the shared HttpClient (optionally with TLS verification disabled)
         HttpClient http = buildHttpClient(config);
@@ -294,7 +294,7 @@ public class OidcExtension implements FlashExtension {
      * If not present, the {@link NoClassDefFoundError} is caught at the call site.
      */
     private static final class OpenApiIntegration {
-        static void register(dev.relism.extension.ExtensionContext ctx,
+        static void register(dev.relism.extension.FlashContext ctx,
                              OidcConfig config, OidcProviderMetadata meta) {
             ctx.find(dev.relism.ext.openapi.OpenApiSecurityRegistry.class)
                .ifPresent(registry -> registry.add(new dev.relism.ext.openapi.OpenApiSecurityContributor() {
diff --git a/flash-extensions/flash-ext-oidc/src/main/java/dev/relism/ext/oidc/OidcMiddleware.java b/flash-extensions/flash-ext-oidc/src/main/java/dev/relism/ext/oidc/OidcMiddleware.java
index abcb4ab..58952ae 100644
--- a/flash-extensions/flash-ext-oidc/src/main/java/dev/relism/ext/oidc/OidcMiddleware.java
+++ b/flash-extensions/flash-ext-oidc/src/main/java/dev/relism/ext/oidc/OidcMiddleware.java
@@ -13,7 +13,7 @@ import java.util.Map;
 import java.util.Optional;
 
 /**
- * Request-level OIDC middleware. Exposed in the {@link dev.relism.extension.ExtensionContext}
+ * Request-level OIDC middleware. Exposed in the {@link dev.relism.extension.FlashContext}
  * for manual use on lambda routes; injected automatically for handlers annotated with
  * {@link Authenticated} or {@link RolesAllowed}.
  *
diff --git a/flash-extensions/flash-ext-openapi/README.md b/flash-extensions/flash-ext-openapi/README.md
index 54e903c..5994374 100644
--- a/flash-extensions/flash-ext-openapi/README.md
+++ b/flash-extensions/flash-ext-openapi/README.md
@@ -121,7 +121,7 @@ builder picks it up automatically — no coupling between extensions.
 
 ### How it works
 
-1. `OpenApiExtension` creates an `OpenApiSecurityRegistry` and exposes it in the `ExtensionContext`.
+1. `OpenApiExtension` creates an `OpenApiSecurityRegistry` and exposes it in the `FlashContext`.
 2. `flash-ext-oidc` calls `ctx.find(OpenApiSecurityRegistry.class)` and registers its contributor.
 3. At spec build time, `OpenApiBuilder` iterates contributors and injects `security` entries on each
    operation whose handler class carries `@Authenticated` or `@RolesAllowed`.
diff --git a/flash-extensions/flash-ext-openapi/src/main/java/dev/relism/ext/openapi/OpenApiExtension.java b/flash-extensions/flash-ext-openapi/src/main/java/dev/relism/ext/openapi/OpenApiExtension.java
index 81fabf1..62bbaaf 100644
--- a/flash-extensions/flash-ext-openapi/src/main/java/dev/relism/ext/openapi/OpenApiExtension.java
+++ b/flash-extensions/flash-ext-openapi/src/main/java/dev/relism/ext/openapi/OpenApiExtension.java
@@ -2,7 +2,7 @@ package dev.relism.ext.openapi;
 
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.dataformat.yaml.YAMLMapper;
-import dev.relism.extension.ExtensionContext;
+import dev.relism.extension.FlashContext;
 import dev.relism.extension.FlashExtension;
 import dev.relism.extension.FlashRegistrar;
 import dev.relism.http.ContentType;
@@ -61,7 +61,7 @@ public class OpenApiExtension implements FlashExtension {
     }
 
     @Override
-    public void install(FlashRegistrar app, ExtensionContext ctx) {
+    public void install(FlashRegistrar app, FlashContext ctx) {
         ObjectMapper jsonMapper = ctx.require(ObjectMapper.class);
         YAMLMapper   yamlMapper = new YAMLMapper();
 
diff --git a/flash-extensions/flash-ext-openapi/src/main/java/dev/relism/ext/openapi/OpenApiSecurityContributor.java b/flash-extensions/flash-ext-openapi/src/main/java/dev/relism/ext/openapi/OpenApiSecurityContributor.java
index e74c82a..6e7fe38 100644
--- a/flash-extensions/flash-ext-openapi/src/main/java/dev/relism/ext/openapi/OpenApiSecurityContributor.java
+++ b/flash-extensions/flash-ext-openapi/src/main/java/dev/relism/ext/openapi/OpenApiSecurityContributor.java
@@ -8,7 +8,7 @@ import java.util.Map;
  *
  * <p>Extensions that enforce authentication (e.g. {@code flash-ext-oidc}) implement
  * this interface and register an instance into {@link OpenApiSecurityRegistry} via the
- * {@link dev.relism.extension.ExtensionContext}. {@link OpenApiExtension} picks it up
+ * {@link dev.relism.extension.FlashContext}. {@link OpenApiExtension} picks it up
  * at spec-generation time — no coupling between the two extensions at install time.
  *
  * <p>Multi-tenant: multiple contributors may coexist. For handlers secured by
diff --git a/flash-extensions/flash-ext-openapi/src/main/java/dev/relism/ext/openapi/OpenApiSecurityRegistry.java b/flash-extensions/flash-ext-openapi/src/main/java/dev/relism/ext/openapi/OpenApiSecurityRegistry.java
index 777ede7..0ed8f0e 100644
--- a/flash-extensions/flash-ext-openapi/src/main/java/dev/relism/ext/openapi/OpenApiSecurityRegistry.java
+++ b/flash-extensions/flash-ext-openapi/src/main/java/dev/relism/ext/openapi/OpenApiSecurityRegistry.java
@@ -7,7 +7,7 @@ import java.util.concurrent.CopyOnWriteArrayList;
 /**
  * Mutable registry of {@link OpenApiSecurityContributor}s.
  *
- * <p>Created and provided to the {@link dev.relism.extension.ExtensionContext} by
+ * <p>Created and provided to the {@link dev.relism.extension.FlashContext} by
  * {@link OpenApiExtension} at install time. Other extensions (e.g. {@code flash-ext-oidc})
  * retrieve it via {@code ctx.find(OpenApiSecurityRegistry.class)} and register their
  * contributor — the OpenAPI extension then picks it up lazily at spec-generation time.
diff --git a/flash-extensions/flash-ext-routeviewer/routeviewer-ui/pnpm-lock.yaml b/flash-extensions/flash-ext-routeviewer/routeviewer-ui/pnpm-lock.yaml
new file mode 100644
index 0000000..2554816
--- /dev/null
+++ b/flash-extensions/flash-ext-routeviewer/routeviewer-ui/pnpm-lock.yaml
@@ -0,0 +1,1233 @@
+lockfileVersion: '9.0'
+
+settings:
+  autoInstallPeers: true
+  excludeLinksFromLockfile: false
+
+importers:
+
+  .:
+    dependencies:
+      '@dagrejs/dagre':
+        specifier: ^1.1.4
+        version: 1.1.8
+      '@xyflow/react':
+        specifier: ^12.3.6
+        version: 12.10.1(react-dom@18.3.1(react@18.3.1))(react@18.3.1)
+      html-to-image:
+        specifier: ^1.11.11
+        version: 1.11.13
+      react:
+        specifier: ^18.3.1
+        version: 18.3.1
+      react-dom:
+        specifier: ^18.3.1
+        version: 18.3.1(react@18.3.1)
+    devDependencies:
+      '@vitejs/plugin-react':
+        specifier: ^4.3.1
+        version: 4.7.0(vite@5.4.21)
+      vite:
+        specifier: ^5.4.11
+        version: 5.4.21
+
+packages:
+
+  '@babel/code-frame@7.29.0':
+    resolution: {integrity: sha512-9NhCeYjq9+3uxgdtp20LSiJXJvN0FeCtNGpJxuMFZ1Kv3cWUNb6DOhJwUvcVCzKGR66cw4njwM6hrJLqgOwbcw==}
+    engines: {node: '>=6.9.0'}
+
+  '@babel/compat-data@7.29.0':
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+    engines: {node: '>=6.9.0'}
+
+  '@babel/core@7.29.0':
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+    engines: {node: '>=6.9.0'}
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+  '@babel/generator@7.29.1':
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+    engines: {node: '>=6.9.0'}
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+    engines: {node: '>=6.9.0'}
+
+  '@babel/helper-globals@7.28.0':
+    resolution: {integrity: sha512-+W6cISkXFa1jXsDEdYA8HeevQT/FULhxzR99pxphltZcVaugps53THCeiWA8SguxxpSp3gKPiuYfSWopkLQ4hw==}
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+      d3-interpolate: 3.0.1
+      d3-selection: 3.0.0
+      d3-zoom: 3.0.0
+
+  baseline-browser-mapping@2.10.11: {}
+
+  browserslist@4.28.1:
+    dependencies:
+      baseline-browser-mapping: 2.10.11
+      caniuse-lite: 1.0.30001781
+      electron-to-chromium: 1.5.326
+      node-releases: 2.0.36
+      update-browserslist-db: 1.2.3(browserslist@4.28.1)
+
+  caniuse-lite@1.0.30001781: {}
+
+  classcat@5.0.5: {}
+
+  convert-source-map@2.0.0: {}
+
+  d3-color@3.1.0: {}
+
+  d3-dispatch@3.0.1: {}
+
+  d3-drag@3.0.0:
+    dependencies:
+      d3-dispatch: 3.0.1
+      d3-selection: 3.0.0
+
+  d3-ease@3.0.1: {}
+
+  d3-interpolate@3.0.1:
+    dependencies:
+      d3-color: 3.1.0
+
+  d3-selection@3.0.0: {}
+
+  d3-timer@3.0.1: {}
+
+  d3-transition@3.0.1(d3-selection@3.0.0):
+    dependencies:
+      d3-color: 3.1.0
+      d3-dispatch: 3.0.1
+      d3-ease: 3.0.1
+      d3-interpolate: 3.0.1
+      d3-selection: 3.0.0
+      d3-timer: 3.0.1
+
+  d3-zoom@3.0.0:
+    dependencies:
+      d3-dispatch: 3.0.1
+      d3-drag: 3.0.0
+      d3-interpolate: 3.0.1
+      d3-selection: 3.0.0
+      d3-transition: 3.0.1(d3-selection@3.0.0)
+
+  debug@4.4.3:
+    dependencies:
+      ms: 2.1.3
+
+  electron-to-chromium@1.5.326: {}
+
+  esbuild@0.21.5:
+    optionalDependencies:
+      '@esbuild/aix-ppc64': 0.21.5
+      '@esbuild/android-arm': 0.21.5
+      '@esbuild/android-arm64': 0.21.5
+      '@esbuild/android-x64': 0.21.5
+      '@esbuild/darwin-arm64': 0.21.5
+      '@esbuild/darwin-x64': 0.21.5
+      '@esbuild/freebsd-arm64': 0.21.5
+      '@esbuild/freebsd-x64': 0.21.5
+      '@esbuild/linux-arm': 0.21.5
+      '@esbuild/linux-arm64': 0.21.5
+      '@esbuild/linux-ia32': 0.21.5
+      '@esbuild/linux-loong64': 0.21.5
+      '@esbuild/linux-mips64el': 0.21.5
+      '@esbuild/linux-ppc64': 0.21.5
+      '@esbuild/linux-riscv64': 0.21.5
+      '@esbuild/linux-s390x': 0.21.5
+      '@esbuild/linux-x64': 0.21.5
+      '@esbuild/netbsd-x64': 0.21.5
+      '@esbuild/openbsd-x64': 0.21.5
+      '@esbuild/sunos-x64': 0.21.5
+      '@esbuild/win32-arm64': 0.21.5
+      '@esbuild/win32-ia32': 0.21.5
+      '@esbuild/win32-x64': 0.21.5
+
+  escalade@3.2.0: {}
+
+  fsevents@2.3.3:
+    optional: true
+
+  gensync@1.0.0-beta.2: {}
+
+  html-to-image@1.11.13: {}
+
+  js-tokens@4.0.0: {}
+
+  jsesc@3.1.0: {}
+
+  json5@2.2.3: {}
+
+  loose-envify@1.4.0:
+    dependencies:
+      js-tokens: 4.0.0
+
+  lru-cache@5.1.1:
+    dependencies:
+      yallist: 3.1.1
+
+  ms@2.1.3: {}
+
+  nanoid@3.3.11: {}
+
+  node-releases@2.0.36: {}
+
+  picocolors@1.1.1: {}
+
+  postcss@8.5.8:
+    dependencies:
+      nanoid: 3.3.11
+      picocolors: 1.1.1
+      source-map-js: 1.2.1
+
+  react-dom@18.3.1(react@18.3.1):
+    dependencies:
+      loose-envify: 1.4.0
+      react: 18.3.1
+      scheduler: 0.23.2
+
+  react-refresh@0.17.0: {}
+
+  react@18.3.1:
+    dependencies:
+      loose-envify: 1.4.0
+
+  rollup@4.60.0:
+    dependencies:
+      '@types/estree': 1.0.8
+    optionalDependencies:
+      '@rollup/rollup-android-arm-eabi': 4.60.0
+      '@rollup/rollup-android-arm64': 4.60.0
+      '@rollup/rollup-darwin-arm64': 4.60.0
+      '@rollup/rollup-darwin-x64': 4.60.0
+      '@rollup/rollup-freebsd-arm64': 4.60.0
+      '@rollup/rollup-freebsd-x64': 4.60.0
+      '@rollup/rollup-linux-arm-gnueabihf': 4.60.0
+      '@rollup/rollup-linux-arm-musleabihf': 4.60.0
+      '@rollup/rollup-linux-arm64-gnu': 4.60.0
+      '@rollup/rollup-linux-arm64-musl': 4.60.0
+      '@rollup/rollup-linux-loong64-gnu': 4.60.0
+      '@rollup/rollup-linux-loong64-musl': 4.60.0
+      '@rollup/rollup-linux-ppc64-gnu': 4.60.0
+      '@rollup/rollup-linux-ppc64-musl': 4.60.0
+      '@rollup/rollup-linux-riscv64-gnu': 4.60.0
+      '@rollup/rollup-linux-riscv64-musl': 4.60.0
+      '@rollup/rollup-linux-s390x-gnu': 4.60.0
+      '@rollup/rollup-linux-x64-gnu': 4.60.0
+      '@rollup/rollup-linux-x64-musl': 4.60.0
+      '@rollup/rollup-openbsd-x64': 4.60.0
+      '@rollup/rollup-openharmony-arm64': 4.60.0
+      '@rollup/rollup-win32-arm64-msvc': 4.60.0
+      '@rollup/rollup-win32-ia32-msvc': 4.60.0
+      '@rollup/rollup-win32-x64-gnu': 4.60.0
+      '@rollup/rollup-win32-x64-msvc': 4.60.0
+      fsevents: 2.3.3
+
+  scheduler@0.23.2:
+    dependencies:
+      loose-envify: 1.4.0
+
+  semver@6.3.1: {}
+
+  source-map-js@1.2.1: {}
+
+  update-browserslist-db@1.2.3(browserslist@4.28.1):
+    dependencies:
+      browserslist: 4.28.1
+      escalade: 3.2.0
+      picocolors: 1.1.1
+
+  use-sync-external-store@1.6.0(react@18.3.1):
+    dependencies:
+      react: 18.3.1
+
+  vite@5.4.21:
+    dependencies:
+      esbuild: 0.21.5
+      postcss: 8.5.8
+      rollup: 4.60.0
+    optionalDependencies:
+      fsevents: 2.3.3
+
+  yallist@3.1.1: {}
+
+  zustand@4.5.7(react@18.3.1):
+    dependencies:
+      use-sync-external-store: 1.6.0(react@18.3.1)
+    optionalDependencies:
+      react: 18.3.1
diff --git a/flash-extensions/flash-ext-routeviewer/routeviewer-ui/src/layout.js b/flash-extensions/flash-ext-routeviewer/routeviewer-ui/src/layout.js
index aa946ea..a68b323 100644
--- a/flash-extensions/flash-ext-routeviewer/routeviewer-ui/src/layout.js
+++ b/flash-extensions/flash-ext-routeviewer/routeviewer-ui/src/layout.js
@@ -16,7 +16,7 @@ const ROOT_GAP    = 48   // vertical gap between independent subtrees (different
 const MARGIN_X    = 60
 const MARGIN_Y    = 60
 
-const ABSTRACT_W  = 160
+const ABSTRACT_W  = 220
 const ABSTRACT_H  = 50
 const CONCRETE_W  = 260
 const LAMBDA_W    = 230
diff --git a/flash-extensions/flash-ext-routeviewer/routeviewer-ui/src/nodes/HandlerNode.jsx b/flash-extensions/flash-ext-routeviewer/routeviewer-ui/src/nodes/HandlerNode.jsx
index 338c720..9402359 100644
--- a/flash-extensions/flash-ext-routeviewer/routeviewer-ui/src/nodes/HandlerNode.jsx
+++ b/flash-extensions/flash-ext-routeviewer/routeviewer-ui/src/nodes/HandlerNode.jsx
@@ -1,5 +1,11 @@
 import { Handle, Position } from '@xyflow/react'
 
+// Invisible handles — React Flow needs them as edge anchor points,
+// but they must not appear as interactive dots in the read-only graph.
+const HANDLE_STYLE = { opacity: 0, width: 6, height: 6, pointerEvents: 'none', border: 'none', background: 'transparent' }
+const TARGET_HANDLE = <Handle type="target" position={Position.Left}  style={HANDLE_STYLE} />
+const SOURCE_HANDLE = <Handle type="source" position={Position.Right} style={HANDLE_STYLE} />
+
 const METHOD_COLORS = {
   GET:     { bg: '#0d4429', color: '#4ade80' },
   POST:    { bg: '#172554', color: '#60a5fa' },
@@ -10,15 +16,17 @@ const METHOD_COLORS = {
   HEAD:    { bg: '#1c1917', color: '#a8a29e' },
 }
 
-// Handles for LR layout: parent flows in from the LEFT, children exit to the RIGHT
-const TARGET_HANDLE = <Handle type="target" position={Position.Left}
-  style={{ left: 0, top: '50%', transform: 'translateY(-50%)' }} />
-const SOURCE_HANDLE = <Handle type="source" position={Position.Right}
-  style={{ right: 0, top: '50%', transform: 'translateY(-50%)' }} />
+// Shared truncation style — applied to any single-line text that can overflow.
+const TRUNCATE = {
+  overflow:     'hidden',
+  textOverflow: 'ellipsis',
+  whiteSpace:   'nowrap',
+}
 
 /**
  * Unified handler node — three modes: ABSTRACT, CONCRETE, LAMBDA.
- * Handles are Left (in) / Right (out) for Left-to-Right DAG layout.
+ * No connection handles: the graph is a read-only visualisation.
+ * Text is clamped to the node width and truncated with an ellipsis.
  */
 export default function HandlerNode({ data, selected }) {
 
@@ -30,16 +38,17 @@ export default function HandlerNode({ data, selected }) {
         border: selected ? '2px solid #60a5fa' : '1px solid #ef4444',
         borderRadius: 8,
         padding: '8px 14px',
-        width: 160,
-        fontFamily: 'system-ui, sans-serif',
+        width: 220,
+        overflow: 'hidden',
         boxSizing: 'border-box',
+        fontFamily: 'system-ui, sans-serif',
       }}>
         {TARGET_HANDLE}
         {SOURCE_HANDLE}
         <div style={{ fontSize: 9, color: '#ef4444', fontWeight: 700, letterSpacing: 0.5, marginBottom: 3 }}>
           ABSTRACT
         </div>
-        <div style={{ fontSize: 12, fontWeight: 600, color: '#e2e8f0', fontFamily: 'monospace' }}>
+        <div style={{ fontSize: 12, fontWeight: 600, color: '#e2e8f0', fontFamily: 'monospace', ...TRUNCATE }}>
           {data.name}
         </div>
       </div>
@@ -48,9 +57,9 @@ export default function HandlerNode({ data, selected }) {
 
   // ── LAMBDA ────────────────────────────────────────────────────────────
   if (data.isLambda) {
-    const method = data.method || 'GET'
-    const path   = data.path   || '/'
-    const m      = METHOD_COLORS[method] || METHOD_COLORS.OPTIONS
+    const method   = data.method || 'GET'
+    const path     = data.path   || '/'
+    const m        = METHOD_COLORS[method] || METHOD_COLORS.OPTIONS
     const pathHtml = path.replace(/\{([^}]+)\}/g, '<span style="color:#a78bfa">{$1}</span>')
 
     return (
@@ -60,15 +69,16 @@ export default function HandlerNode({ data, selected }) {
         borderRadius: 8,
         padding: '10px 12px',
         width: 230,
-        fontFamily: 'system-ui, sans-serif',
+        overflow: 'hidden',
         boxSizing: 'border-box',
+        fontFamily: 'system-ui, sans-serif',
       }}>
         {TARGET_HANDLE}
         {SOURCE_HANDLE}
         <div style={{ fontSize: 9, color: '#60a5fa', fontWeight: 700, letterSpacing: 0.5, marginBottom: 7 }}>
           LAMBDA
         </div>
-        <div style={{ display: 'flex', alignItems: 'center', gap: 6 }}>
+        <div style={{ display: 'flex', alignItems: 'center', gap: 6, overflow: 'hidden' }}>
           <span style={{
             background: m.bg, color: m.color,
             fontSize: 9, fontWeight: 700, padding: '2px 5px',
@@ -77,7 +87,7 @@ export default function HandlerNode({ data, selected }) {
             {method}
           </span>
           <span
-            style={{ fontSize: 10, fontFamily: 'monospace', color: '#8892a4' }}
+            style={{ fontSize: 10, fontFamily: 'monospace', color: '#8892a4', ...TRUNCATE }}
             dangerouslySetInnerHTML={{ __html: pathHtml }}
           />
         </div>
@@ -88,6 +98,7 @@ export default function HandlerNode({ data, selected }) {
                 background: '#1f1a0e', color: '#f6ad55',
                 fontSize: 8, fontWeight: 600, padding: '1px 4px',
                 borderRadius: 2, fontFamily: 'monospace',
+                ...TRUNCATE, maxWidth: '100%',
               }}>{mw}</span>
             ))}
           </div>
@@ -104,18 +115,18 @@ export default function HandlerNode({ data, selected }) {
       borderRadius: 8,
       padding: '10px 12px',
       width: 260,
-      fontFamily: 'system-ui, sans-serif',
+      overflow: 'hidden',
       boxSizing: 'border-box',
+      fontFamily: 'system-ui, sans-serif',
     }}>
       {TARGET_HANDLE}
       {SOURCE_HANDLE}
-
       {/* Header */}
       <div style={{ marginBottom: 8 }}>
         <div style={{ fontSize: 9, color: '#60a5fa', fontWeight: 700, letterSpacing: 0.5, marginBottom: 2 }}>
           HANDLER
         </div>
-        <div style={{ fontSize: 12, fontWeight: 700, color: '#e2e8f0', fontFamily: 'monospace' }}>
+        <div style={{ fontSize: 12, fontWeight: 700, color: '#e2e8f0', fontFamily: 'monospace', ...TRUNCATE }}>
           {data.name}
         </div>
       </div>
@@ -125,7 +136,7 @@ export default function HandlerNode({ data, selected }) {
       {/* Routes */}
       <div style={{ marginBottom: data.middleware?.length > 0 ? 8 : 0 }}>
         {data.routes?.map((route, i) => {
-          const m = METHOD_COLORS[route.method] || METHOD_COLORS.OPTIONS
+          const m        = METHOD_COLORS[route.method] || METHOD_COLORS.OPTIONS
           const pathHtml = (route.path || '/').replace(
             /\{([^}]+)\}/g,
             '<span style="color:#a78bfa">{$1}</span>'
@@ -134,6 +145,7 @@ export default function HandlerNode({ data, selected }) {
             <div key={i} style={{
               display: 'flex', alignItems: 'center', gap: 6,
               marginBottom: i < data.routes.length - 1 ? 5 : 0,
+              overflow: 'hidden',
             }}>
               <span style={{
                 background: m.bg, color: m.color,
@@ -143,7 +155,7 @@ export default function HandlerNode({ data, selected }) {
                 {route.method}
               </span>
               <span
-                style={{ fontSize: 10, fontFamily: 'monospace', color: '#8892a4' }}
+                style={{ fontSize: 10, fontFamily: 'monospace', color: '#8892a4', ...TRUNCATE }}
                 dangerouslySetInnerHTML={{ __html: pathHtml }}
               />
             </div>
@@ -159,6 +171,7 @@ export default function HandlerNode({ data, selected }) {
               background: '#1f1a0e', color: '#f6ad55',
               fontSize: 8, fontWeight: 600, padding: '1px 4px',
               borderRadius: 2, fontFamily: 'monospace',
+              ...TRUNCATE, maxWidth: '100%',
             }}>{mw}</span>
           ))}
         </div>
diff --git a/flash-extensions/flash-ext-routeviewer/src/main/java/dev/relism/ext/routeviewer/RouteViewerExtension.java b/flash-extensions/flash-ext-routeviewer/src/main/java/dev/relism/ext/routeviewer/RouteViewerExtension.java
index 8675c4b..60ad14a 100644
--- a/flash-extensions/flash-ext-routeviewer/src/main/java/dev/relism/ext/routeviewer/RouteViewerExtension.java
+++ b/flash-extensions/flash-ext-routeviewer/src/main/java/dev/relism/ext/routeviewer/RouteViewerExtension.java
@@ -1,7 +1,7 @@
 package dev.relism.ext.routeviewer;
 
 import dev.relism.ext.routeviewer.model.RouteGraph;
-import dev.relism.extension.ExtensionContext;
+import dev.relism.extension.FlashContext;
 import dev.relism.extension.FlashExtension;
 import dev.relism.extension.FlashRegistrar;
 import dev.relism.http.ContentType;
@@ -36,7 +36,7 @@ import dev.relism.http.ContentType;
  * }</pre>
  *
  * <p>All route metadata is collected once at boot time via
- * {@link ExtensionContext#addRouteListener}. Zero overhead on the request hot-path.
+ * {@link FlashContext#addRouteListener}. Zero overhead on the request hot-path.
  */
 public class RouteViewerExtension implements FlashExtension {
 
@@ -55,7 +55,7 @@ public class RouteViewerExtension implements FlashExtension {
     public RouteViewerExtension(String path) { this.path = path; }
 
     @Override
-    public void install(FlashRegistrar app, ExtensionContext ctx) {
+    public void install(FlashRegistrar app, FlashContext ctx) {
         RouteViewerHandler     shell = new RouteViewerHandler();
         RouteViewerDataHandler data  = new RouteViewerDataHandler(graph);
 
diff --git a/flash-extensions/flash-ext-routeviewer/src/main/java/dev/relism/ext/routeviewer/model/RouteRecord.java b/flash-extensions/flash-ext-routeviewer/src/main/java/dev/relism/ext/routeviewer/model/RouteRecord.java
index 34b6691..f0cdaf0 100644
--- a/flash-extensions/flash-ext-routeviewer/src/main/java/dev/relism/ext/routeviewer/model/RouteRecord.java
+++ b/flash-extensions/flash-ext-routeviewer/src/main/java/dev/relism/ext/routeviewer/model/RouteRecord.java
@@ -47,6 +47,11 @@ public record RouteRecord(
     /**
      * Walks the superclass chain, stopping before {@code RequestHandler}.
      * {@code RequestHandler} is the universal root — showing it adds no information.
+     *
+     * <p>Names are produced by {@link #displayName(Class)} so that static inner classes
+     * appear as {@code OuterClass.InnerClass} (e.g. {@code PostHandlers.List}) rather
+     * than the ambiguous simple name ({@code List}). This guarantees globally unique
+     * display labels in the React Flow graph regardless of inner-class naming collisions.
      */
     private static List<String> buildAbstractionChain(Class<?> cls) {
         if (cls == null) return List.of();
@@ -54,12 +59,31 @@ public record RouteRecord(
         Class<?> c = cls;
         while (c != null && !c.equals(Object.class)) {
             if (ROOT_HANDLER.equals(c.getSimpleName())) break;
-            chain.add(c.getSimpleName());
+            chain.add(displayName(c));
             c = c.getSuperclass();
         }
         return List.copyOf(chain);
     }
 
+    /**
+     * Returns a human-readable, globally unique display name for a handler class.
+     *
+     * <ul>
+     *   <li>Top-level class {@code HtmlHandler} → {@code "HtmlHandler"}</li>
+     *   <li>Static inner class {@code PostHandlers$List} → {@code "PostHandlers.List"}</li>
+     *   <li>Deeply nested {@code A$B$C} → {@code "A.B.C"}</li>
+     * </ul>
+     *
+     * Strategy: take {@code c.getName()} (binary name with {@code $} separators),
+     * strip the package prefix, then replace {@code $} with {@code .}.
+     */
+    private static String displayName(Class<?> c) {
+        String binary = c.getName();                          // e.g. dev.relism.bench.handler.api.PostHandlers$List
+        int lastDot = binary.lastIndexOf('.');
+        String local = lastDot >= 0 ? binary.substring(lastDot + 1) : binary;  // PostHandlers$List
+        return local.replace('$', '.');                       // PostHandlers.List
+    }
+
     private static List<String> buildPointcuts(Class<?> cls) {
         if (cls == null) return List.of();
         List<String> pointcuts = new ArrayList<>();
diff --git a/flash-extensions/flash-ext-routeviewer/src/main/resources/routeviewer/app.js b/flash-extensions/flash-ext-routeviewer/src/main/resources/routeviewer/app.js
index 5910655..312f0a7 100644
--- a/flash-extensions/flash-ext-routeviewer/src/main/resources/routeviewer/app.js
+++ b/flash-extensions/flash-ext-routeviewer/src/main/resources/routeviewer/app.js
@@ -1,4 +1,4 @@
-(function(){const t=document.createElement("link").relList;if(t&&t.supports&&t.supports("modulepreload"))return;for(const o of document.querySelectorAll('link[rel="modulepreload"]'))r(o);new MutationObserver(o=>{for(const i of o)if(i.type==="childList")for(const s of i.addedNodes)s.tagName==="LINK"&&s.rel==="modulepreload"&&r(s)}).observe(document,{childList:!0,subtree:!0});function n(o){const i={};return o.integrity&&(i.integrity=o.integrity),o.referrerPolicy&&(i.referrerPolicy=o.referrerPolicy),o.crossOrigin==="use-credentials"?i.credentials="include":o.crossOrigin==="anonymous"?i.credentials="omit":i.credentials="same-origin",i}function r(o){if(o.ep)return;o.ep=!0;const i=n(o);fetch(o.href,i)}})();function Dd(e){return e&&e.__esModule&&Object.prototype.hasOwnProperty.call(e,"default")?e.default:e}var Fd={exports:{}},_s={},Od={exports:{}},te={};/**
+(function(){const t=document.createElement("link").relList;if(t&&t.supports&&t.supports("modulepreload"))return;for(const o of document.querySelectorAll('link[rel="modulepreload"]'))r(o);new MutationObserver(o=>{for(const i of o)if(i.type==="childList")for(const s of i.addedNodes)s.tagName==="LINK"&&s.rel==="modulepreload"&&r(s)}).observe(document,{childList:!0,subtree:!0});function n(o){const i={};return o.integrity&&(i.integrity=o.integrity),o.referrerPolicy&&(i.referrerPolicy=o.referrerPolicy),o.crossOrigin==="use-credentials"?i.credentials="include":o.crossOrigin==="anonymous"?i.credentials="omit":i.credentials="same-origin",i}function r(o){if(o.ep)return;o.ep=!0;const i=n(o);fetch(o.href,i)}})();function Od(e){return e&&e.__esModule&&Object.prototype.hasOwnProperty.call(e,"default")?e.default:e}var Fd={exports:{}},ks={},jd={exports:{}},te={};/**
  * @license React
  * react.production.min.js
  *
@@ -6,7 +6,7 @@
  *
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
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n=t.child;n!==null;){if(n.tag===5||n.tag===6)e.appendChild(n.stateNode);else if(n.tag!==4&&n.child!==null){n.child.return=n,n=n.child;continue}if(n===t)break;for(;n.sibling===null;){if(n.return===null||n.return===t)return;n=n.return}n.sibling.return=n.return,n=n.sibling}};Nu=function(){};zp=function(e,t,n,r){var o=e.memoizedProps;if(o!==r){e=t.stateNode,xn(Et.current);var i=null;switch(n){case"input":o=Ql(e,o),r=Ql(e,r),i=[];break;case"select":o=me({},o,{value:void 0}),r=me({},r,{value:void 0}),i=[];break;case"textarea":o=Zl(e,o),r=Zl(e,r),i=[];break;default:typeof o.onClick!="function"&&typeof r.onClick=="function"&&(e.onclick=Gi)}Jl(n,r);var s;n=null;for(a in o)if(!r.hasOwnProperty(a)&&o.hasOwnProperty(a)&&o[a]!=null)if(a==="style"){var l=o[a];for(s in l)l.hasOwnProperty(s)&&(n||(n={}),n[s]="")}else 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i=t.memoizedProps;switch(r[xt]=t,r[wo]=i,e=(t.mode&1)!==0,n){case"dialog":ae("cancel",r),ae("close",r);break;case"iframe":case"object":case"embed":ae("load",r);break;case"video":case"audio":for(o=0;o<Qr.length;o++)ae(Qr[o],r);break;case"source":ae("error",r);break;case"img":case"image":case"link":ae("error",r),ae("load",r);break;case"details":ae("toggle",r);break;case"input":_c(r,i),ae("invalid",r);break;case"select":r._wrapperState={wasMultiple:!!i.multiple},ae("invalid",r);break;case"textarea":Cc(r,i),ae("invalid",r)}Jl(n,i),o=null;for(var s in i)if(i.hasOwnProperty(s)){var l=i[s];s==="children"?typeof l=="string"?r.textContent!==l&&(i.suppressHydrationWarning!==!0&&ii(r.textContent,l,e),o=["children",l]):typeof 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r.is=="string"?e=s.createElement(n,{is:r.is}):(e=s.createElement(n),n==="select"&&(s=e,r.multiple?s.multiple=!0:r.size&&(s.size=r.size))):e=s.createElementNS(e,n),e[xt]=t,e[wo]=r,Ip(e,t,!1,!1),t.stateNode=e;e:{switch(s=eu(n,r),n){case"dialog":ae("cancel",e),ae("close",e),o=r;break;case"iframe":case"object":case"embed":ae("load",e),o=r;break;case"video":case"audio":for(o=0;o<Qr.length;o++)ae(Qr[o],e);o=r;break;case"source":ae("error",e),o=r;break;case"img":case"image":case"link":ae("error",e),ae("load",e),o=r;break;case"details":ae("toggle",e),o=r;break;case"input":_c(e,r),o=Ql(e,r),ae("invalid",e);break;case"option":o=r;break;case"select":e._wrapperState={wasMultiple:!!r.multiple},o=me({},r,{value:void 0}),ae("invalid",e);break;case"textarea":Cc(e,r),o=Zl(e,r),ae("invalid",e);break;default:o=r}Jl(n,o),l=o;for(i in l)if(l.hasOwnProperty(i)){var u=l[i];i==="style"?ah(e,u):i==="dangerouslySetInnerHTML"?(u=u?u.__html:void 0,u!=null&&lh(e,u)):i==="children"?typeof 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  * use-sync-external-store-shim.production.js
  *
@@ -45,7 +45,7 @@ Error generating stack: `+i.message+`
  *
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
- */var Cr=$;function l_(e,t){return e===t&&(e!==0||1/e===1/t)||e!==e&&t!==t}var u_=typeof Object.is=="function"?Object.is:l_,a_=Cr.useState,c_=Cr.useEffect,f_=Cr.useLayoutEffect,d_=Cr.useDebugValue;function h_(e,t){var n=t(),r=a_({inst:{value:n,getSnapshot:t}}),o=r[0].inst,i=r[1];return f_(function(){o.value=n,o.getSnapshot=t,Dl(o)&&i({inst:o})},[e,n,t]),c_(function(){return Dl(o)&&i({inst:o}),e(function(){Dl(o)&&i({inst:o})})},[e]),d_(n),n}function Dl(e){var t=e.getSnapshot;e=e.value;try{var n=t();return!u_(e,n)}catch{return!0}}function p_(e,t){return t()}var g_=typeof window>"u"||typeof window.document>"u"||typeof window.document.createElement>"u"?p_:h_;im.useSyncExternalStore=Cr.useSyncExternalStore!==void 0?Cr.useSyncExternalStore:g_;om.exports=im;var m_=om.exports;/**
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  * use-sync-external-store-shim/with-selector.production.js
  *
@@ -53,11 +53,11 @@ Error generating stack: `+i.message+`
  *
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diff --git a/flash-extensions/flash-ext-view/pom.xml b/flash-extensions/flash-ext-view/pom.xml
new file mode 100644
index 0000000..dda326c
--- /dev/null
+++ b/flash-extensions/flash-ext-view/pom.xml
@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>dev.relism</groupId>
+        <artifactId>flash-extensions</artifactId>
+        <version>1.0-SNAPSHOT</version>
+    </parent>
+
+    <artifactId>flash-ext-view</artifactId>
+
+    <dependencies>
+        <dependency>
+            <groupId>dev.relism</groupId>
+            <artifactId>flash</artifactId>
+        </dependency>
+
+        <!--
+            Optional engine bridges — not transitive.
+            Users must add whichever engine they select via ViewEngineType
+            to their own pom.xml. If absent at runtime, ViewExtension throws
+            a descriptive IllegalStateException at boot time.
+        -->
+        <dependency>
+            <groupId>org.thymeleaf</groupId>
+            <artifactId>thymeleaf</artifactId>
+            <version>3.1.2.RELEASE</version>
+            <optional>true</optional>
+        </dependency>
+
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter</artifactId>
+        </dependency>
+    </dependencies>
+
+</project>
diff --git a/flash-extensions/flash-ext-view/src/main/java/dev/relism/ext/view/Renderer.java b/flash-extensions/flash-ext-view/src/main/java/dev/relism/ext/view/Renderer.java
new file mode 100644
index 0000000..764d9e1
--- /dev/null
+++ b/flash-extensions/flash-ext-view/src/main/java/dev/relism/ext/view/Renderer.java
@@ -0,0 +1,98 @@
+package dev.relism.ext.view;
+
+import dev.relism.http.ContentType;
+import dev.relism.models.Response;
+
+/**
+ * Imperative view renderer — the programmatic counterpart to {@link View @View}.
+ *
+ * <p>Retrieve once at boot time in {@link dev.relism.models.RequestHandler#onInit onInit()},
+ * cache in a private field, and call on the hot-path with zero lookup overhead:
+ *
+ * <pre>{@code
+ * @Route(method = HttpMethod.GET, path = "/dashboard")
+ * public class DashboardHandler extends RequestHandler {
+ *     private Renderer renderer;
+ *     private DashboardService svc;
+ *
+ *     @Override protected void onInit() {
+ *         renderer = require(Renderer.class);
+ *         svc      = require(DashboardService.class);
+ *     }
+ *
+ *     @Override public Object handle(Request req, Response res) throws Exception {
+ *         return renderer.view(res, "dashboard", Map.of("data", svc.stats()));
+ *     }
+ * }
+ * }</pre>
+ *
+ * <p>For lambda handlers, capture {@code Renderer} from the context at registration
+ * time — it is available immediately after {@code ViewExtension} is installed:
+ *
+ * <pre>{@code
+ * app.install(new ViewExtension(engine));
+ * Renderer renderer = app.ctx().require(Renderer.class);
+ * app.get("/about", (req, res) -> renderer.view(res, "about"));
+ * }</pre>
+ *
+ * <p>The underlying {@link ViewEngine} is thread-safe after construction — no
+ * synchronization is needed on the hot-path.
+ */
+public final class Renderer {
+
+    private final ViewEngine engine;
+
+    /** Package-private — constructed exclusively by {@link ViewExtension}. */
+    Renderer(ViewEngine engine) {
+        this.engine = engine;
+    }
+
+    // ── Rendering ────────────────────────────────────────────────────────────
+
+    /**
+     * Renders {@code template} with {@code model}, sets the {@code Content-Type}
+     * header to {@code type}, and returns the rendered string as the handler body.
+     */
+    public String view(Response res, String template, Object model, ContentType type) throws Exception {
+        res.setContentType(type);
+        return engine.render(template, model);
+    }
+
+    /**
+     * Renders {@code template} with {@code model} and sets
+     * {@code Content-Type: text/html}.
+     */
+    public String view(Response res, String template, Object model) throws Exception {
+        return view(res, template, model, ContentType.TEXT_HTML);
+    }
+
+    /** Renders {@code template} with a {@code null} model. */
+    public String view(Response res, String template) throws Exception {
+        return view(res, template, null);
+    }
+
+    // ── Template signal ───────────────────────────────────────────────────────
+
+    /**
+     * Creates a deferred {@link Template} signal that will be intercepted by the
+     * {@link View @View} middleware. Use this from handlers that carry {@code @View}
+     * but need to dynamically override the template name or supply a different model.
+     *
+     * <p>Does <em>not</em> render immediately — rendering happens in the middleware.
+     */
+    public Template template(String name, Object model) {
+        return Template.of(name, model);
+    }
+
+    /** Creates a {@link Template} signal with a {@code null} model. */
+    public Template template(String name) {
+        return Template.of(name);
+    }
+
+    // ── Escape hatch ─────────────────────────────────────────────────────────
+
+    /** Direct access to the underlying {@link ViewEngine} for advanced use cases. */
+    public ViewEngine engine() {
+        return engine;
+    }
+}
diff --git a/flash-extensions/flash-ext-view/src/main/java/dev/relism/ext/view/Template.java b/flash-extensions/flash-ext-view/src/main/java/dev/relism/ext/view/Template.java
new file mode 100644
index 0000000..69ac04e
--- /dev/null
+++ b/flash-extensions/flash-ext-view/src/main/java/dev/relism/ext/view/Template.java
@@ -0,0 +1,62 @@
+package dev.relism.ext.view;
+
+/**
+ * Explicit render signal returned from a handler to override the template name
+ * and/or model chosen by {@link View @View}.
+ *
+ * <p>{@code Template} is a lightweight value object — it carries the template
+ * name and an optional model, but performs no rendering itself. The
+ * {@link ViewExtension}-injected middleware detects it at the call site and
+ * delegates to the {@link ViewEngine}.
+ *
+ * <p>Use {@code Template} when:
+ * <ul>
+ *   <li>The handler is annotated with {@code @View} but needs to redirect to a
+ *       different template dynamically (e.g. on validation failure).</li>
+ *   <li>A lambda handler or a handler <em>without</em> {@code @View} wants to
+ *       trigger rendering without registering the annotation — pair with a
+ *       {@link Renderer} captured at construction time.</li>
+ * </ul>
+ *
+ * <pre>{@code
+ * // Inside a @View-annotated handler — overrides the default template on error
+ * public Object handle(Request req, Response res) {
+ *     if (!valid) return Template.of("form-error", Map.of("errors", errors));
+ *     return service.findAll();   // falls back to @View template
+ * }
+ *
+ * // Lambda handler — pair with Renderer captured from ctx at boot time
+ * Renderer renderer = ctx.require(Renderer.class);
+ * app.get("/page", (req, res) -> renderer.view(res, "page", model));
+ * }</pre>
+ */
+public final class Template {
+
+    private final String name;
+    private final Object model;
+
+    private Template(String name, Object model) {
+        this.name  = name;
+        this.model = model;
+    }
+
+    /** Creates a {@code Template} signal with the given name and model. */
+    public static Template of(String name, Object model) {
+        return new Template(name, model);
+    }
+
+    /** Creates a {@code Template} signal with a {@code null} model. */
+    public static Template of(String name) {
+        return new Template(name, null);
+    }
+
+    /** The template name/path to render. */
+    public String name() {
+        return name;
+    }
+
+    /** The model to bind; may be {@code null}. */
+    public Object model() {
+        return model;
+    }
+}
diff --git a/flash-extensions/flash-ext-view/src/main/java/dev/relism/ext/view/ThymeleafEngine.java b/flash-extensions/flash-ext-view/src/main/java/dev/relism/ext/view/ThymeleafEngine.java
new file mode 100644
index 0000000..7a6967a
--- /dev/null
+++ b/flash-extensions/flash-ext-view/src/main/java/dev/relism/ext/view/ThymeleafEngine.java
@@ -0,0 +1,146 @@
+package dev.relism.ext.view;
+
+import org.thymeleaf.IEngineConfiguration;
+import org.thymeleaf.TemplateEngine;
+import org.thymeleaf.context.Context;
+import org.thymeleaf.context.IExpressionContext;
+import org.thymeleaf.linkbuilder.ILinkBuilder;
+import org.thymeleaf.templatemode.TemplateMode;
+import org.thymeleaf.templateresolver.ClassLoaderTemplateResolver;
+
+import java.net.URLEncoder;
+import java.nio.charset.StandardCharsets;
+import java.util.Map;
+
+/**
+ * {@link ViewEngine} bridge for Thymeleaf 3.x.
+ *
+ * <p>Package-private — instantiated exclusively by {@link ViewEngineType#THYMELEAF}.
+ *
+ * <h3>Default configuration</h3>
+ * <ul>
+ *   <li>Prefix  : {@code /templates/}  (classpath-relative)</li>
+ *   <li>Suffix  : {@code .html}</li>
+ *   <li>Mode    : {@link TemplateMode#HTML}</li>
+ *   <li>Encoding: UTF-8</li>
+ *   <li>Cache   : enabled in production, disabled in dev mode
+ *                 ({@code flash.env=dev} or {@code FLASH_ENV=dev})</li>
+ * </ul>
+ *
+ * <h3>Link building</h3>
+ * Thymeleaf's built-in {@code StandardLinkBuilder} requires an
+ * {@code IWebContext} (servlet context) to resolve context-relative paths
+ * ({@code @{/foo}}). Flash runs standalone, so this engine registers a custom
+ * {@link FlashLinkBuilder} that resolves {@code @{...}} expressions without a
+ * servlet context — path variables and query parameters are supported as usual.
+ *
+ * <h3>Model conventions</h3>
+ * <ul>
+ *   <li>{@link Map} model → each entry is a named Thymeleaf variable.</li>
+ *   <li>Any other non-null value → registered under the key {@code "it"}.</li>
+ *   <li>{@code null} model → empty context.</li>
+ * </ul>
+ */
+final class ThymeleafEngine implements ViewEngine {
+
+    private static final String PREFIX   = "/templates/";
+    private static final String SUFFIX   = ".html";
+    private static final String FRAGMENT = " :: content";
+
+    private final TemplateEngine engine;
+
+    ThymeleafEngine(boolean cacheEnabled) {
+        ClassLoaderTemplateResolver resolver = new ClassLoaderTemplateResolver();
+        resolver.setPrefix(PREFIX);
+        resolver.setSuffix(SUFFIX);
+        resolver.setTemplateMode(TemplateMode.HTML);
+        resolver.setCharacterEncoding("UTF-8");
+        resolver.setCacheable(cacheEnabled);
+
+        this.engine = new TemplateEngine();
+        this.engine.setTemplateResolver(resolver);
+        // Replace the default StandardLinkBuilder (which requires IWebContext)
+        // with our standalone-compatible link builder.
+        this.engine.addLinkBuilder(FlashLinkBuilder.INSTANCE);
+    }
+
+    @Override
+    public String render(String template, Object model, boolean fragment) {
+        Context ctx = new Context();
+        populateContext(ctx, model);
+        return engine.process(fragment ? template + FRAGMENT : template, ctx);
+    }
+
+    private static void populateContext(Context ctx, Object model) {
+        if (model instanceof Map<?, ?> map) {
+            map.forEach((k, v) -> ctx.setVariable(String.valueOf(k), v));
+        } else if (model != null) {
+            ctx.setVariable("it", model);
+        }
+    }
+
+    // ── Link builder ──────────────────────────────────────────────────────────
+
+    /**
+     * Standalone-compatible link builder for Thymeleaf's {@code @{...}} expressions.
+     *
+     * <p>Thymeleaf's built-in {@code StandardLinkBuilder} requires an
+     * {@code IWebContext} (i.e. a servlet container) to resolve context-relative
+     * paths starting with {@code /}. This builder replicates that behaviour without
+     * the servlet dependency:
+     * <ul>
+     *   <li>Path variables — {@code @{/posts/{id}(id=${post.id})}} → {@code /posts/abc}</li>
+     *   <li>Query params  — {@code @{/search(q=${term})}}        → {@code /search?q=hello}</li>
+     *   <li>Mixed         — {@code @{/posts/{id}(id=x,p=2)}}     → {@code /posts/x?p=2}</li>
+     * </ul>
+     * Registered at order {@link Integer#MIN_VALUE} so it takes precedence over
+     * {@code StandardLinkBuilder} ({@code Integer.MAX_VALUE}).
+     */
+    private static final class FlashLinkBuilder implements ILinkBuilder {
+
+        static final FlashLinkBuilder INSTANCE = new FlashLinkBuilder();
+
+        @Override public String  getName()  { return "flash"; }
+        @Override public Integer getOrder() { return Integer.MIN_VALUE; }
+
+        @Override
+        public String buildLink(IExpressionContext ctx,
+                                String base,
+                                Map<String, Object> params) {
+            if (base == null) return "";
+            String url = expandPathVars(base, params);
+            return appendQueryString(url, base, params);
+        }
+
+        /** Substitutes {@code {key}} placeholders in the path with their encoded values. */
+        private static String expandPathVars(String base, Map<String, Object> params) {
+            if (params == null || params.isEmpty() || !base.contains("{")) return base;
+            String result = base;
+            for (var e : params.entrySet()) {
+                String placeholder = '{' + e.getKey() + '}';
+                if (result.contains(placeholder) && e.getValue() != null) {
+                    result = result.replace(placeholder, encode(String.valueOf(e.getValue())));
+                }
+            }
+            return result;
+        }
+
+        /** Appends parameters that were NOT consumed as path variables as {@code ?k=v&…} pairs. */
+        private static String appendQueryString(String url, String base, Map<String, Object> params) {
+            if (params == null || params.isEmpty()) return url;
+            StringBuilder qs = new StringBuilder();
+            for (var e : params.entrySet()) {
+                if (base.contains('{' + e.getKey() + '}') || e.getValue() == null) continue;
+                qs.append(qs.isEmpty() ? '?' : '&')
+                  .append(encode(e.getKey()))
+                  .append('=')
+                  .append(encode(String.valueOf(e.getValue())));
+            }
+            return qs.isEmpty() ? url : url + qs;
+        }
+
+        private static String encode(String s) {
+            return URLEncoder.encode(s, StandardCharsets.UTF_8).replace("+", "%20");
+        }
+    }
+}
diff --git a/flash-extensions/flash-ext-view/src/main/java/dev/relism/ext/view/View.java b/flash-extensions/flash-ext-view/src/main/java/dev/relism/ext/view/View.java
new file mode 100644
index 0000000..31e4dae
--- /dev/null
+++ b/flash-extensions/flash-ext-view/src/main/java/dev/relism/ext/view/View.java
@@ -0,0 +1,75 @@
+package dev.relism.ext.view;
+
+import dev.relism.http.ContentType;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * Declarative view binding for class-based handlers.
+ *
+ * <p>When {@code ViewExtension} is installed, handlers annotated with {@code @View}
+ * receive an injected middleware that intercepts the handler's return value and
+ * passes it to the {@link ViewEngine} for rendering. The rendered string replaces
+ * the handler's return value as the response body, and {@link #contentType()} is
+ * written to the {@code Content-Type} header.
+ *
+ * <h3>Return-value semantics</h3>
+ * <ul>
+ *   <li>Return a {@link Template} — overrides both the template name <em>and</em>
+ *       the model dynamically (e.g. redirect to a different template on error).</li>
+ *   <li>Return any other non-null value — used as the model; the template name
+ *       comes from {@link #value()}.</li>
+ *   <li>Return {@code null} — renders {@link #value()} with a {@code null} model.</li>
+ * </ul>
+ *
+ * <pre>{@code
+ * @Route(method = HttpMethod.GET, path = "/")
+ * @View("home")
+ * public class HomeHandler extends RequestHandler {
+ *     private PostService posts;
+ *     @Override protected void onInit() { posts = require(PostService.class); }
+ *
+ *     @Override public Object handle(Request req, Response res) {
+ *         return Map.of("posts", posts.findAll());   // model → home template
+ *     }
+ * }
+ *
+ * // Dynamic template override via Template signal
+ * @View("list")
+ * public class ConditionalHandler extends RequestHandler {
+ *     public Object handle(Request req, Response res) {
+ *         if (something) return Template.of("error", Map.of("msg", "oops"));
+ *         return data;   // uses "list" template
+ *     }
+ * }
+ * }</pre>
+ *
+ * <p>The annotation is inspected via superclass traversal, so a base handler class
+ * can declare the view template and all concrete subclasses inherit it.
+ */
+@Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.TYPE)
+public @interface View {
+
+    /**
+     * Template name or path passed to the {@link ViewEngine}.
+     * The exact format is engine-specific (e.g. {@code "home"}, {@code "views/home.html"}).
+     */
+    String value();
+
+    /**
+     * {@code Content-Type} written to the response.
+     * Defaults to {@link ContentType#TEXT_HTML}.
+     */
+    ContentType contentType() default ContentType.TEXT_HTML;
+
+    /**
+     * If {@code true}, instructs the {@link ViewEngine} to render only a named
+     * fragment inside the template rather than the full page.
+     * Useful for HTMX / partial-update patterns.
+     */
+    boolean fragment() default false;
+}
diff --git a/flash-extensions/flash-ext-view/src/main/java/dev/relism/ext/view/ViewEngine.java b/flash-extensions/flash-ext-view/src/main/java/dev/relism/ext/view/ViewEngine.java
new file mode 100644
index 0000000..5287713
--- /dev/null
+++ b/flash-extensions/flash-ext-view/src/main/java/dev/relism/ext/view/ViewEngine.java
@@ -0,0 +1,45 @@
+package dev.relism.ext.view;
+
+/**
+ * Contract for template engine integrations.
+ *
+ * <p>Implement this interface to plug any template engine (Thymeleaf, Jinjava,
+ * Mustache, FreeMarker, …) into the Flash view layer. A single instance is
+ * shared across all handlers, so implementations must be thread-safe.
+ *
+ * <pre>{@code
+ * // Thymeleaf example
+ * ViewEngine thymeleaf = (template, model, fragment) -> {
+ *     Context ctx = new Context();
+ *     if (model instanceof Map<?,?> m) m.forEach((k, v) -> ctx.setVariable(k.toString(), v));
+ *     else if (model != null) ctx.setVariable("model", model);
+ *     return engine.process(fragment ? template + " :: fragment" : template, ctx);
+ * };
+ *
+ * app.install(new ViewExtension(thymeleaf));
+ * }</pre>
+ */
+@FunctionalInterface
+public interface ViewEngine {
+
+    /**
+     * Renders {@code template} with the supplied {@code model}.
+     *
+     * @param template the template name or path — engine-specific convention
+     *                 (e.g. {@code "views/home"}, {@code "home.html"})
+     * @param model    the model object passed to the template; may be {@code null}
+     * @param fragment if {@code true}, only a named fragment inside the template
+     *                 should be rendered (Thymeleaf: {@code template :: fragment},
+     *                 Mustache: partial name, etc.)
+     * @return the rendered output string
+     * @throws Exception any rendering error — propagated as a 500 by the Flash runtime
+     */
+    String render(String template, Object model, boolean fragment) throws Exception;
+
+    /**
+     * Convenience overload — renders the full template ({@code fragment = false}).
+     */
+    default String render(String template, Object model) throws Exception {
+        return render(template, model, false);
+    }
+}
diff --git a/flash-extensions/flash-ext-view/src/main/java/dev/relism/ext/view/ViewEngineType.java b/flash-extensions/flash-ext-view/src/main/java/dev/relism/ext/view/ViewEngineType.java
new file mode 100644
index 0000000..b1bd71a
--- /dev/null
+++ b/flash-extensions/flash-ext-view/src/main/java/dev/relism/ext/view/ViewEngineType.java
@@ -0,0 +1,80 @@
+package dev.relism.ext.view;
+
+/**
+ * Managed template engine types supported out-of-the-box by {@link ViewExtension}.
+ *
+ * <p>Pass one of these constants to {@link ViewExtension#ViewExtension(ViewEngineType)}
+ * for zero-boilerplate setup. The extension auto-configures the selected engine with
+ * sensible defaults and validates that the required library is on the runtime classpath,
+ * throwing a descriptive {@link IllegalStateException} at boot time if it is not.
+ *
+ * <pre>{@code
+ * // Zero-boilerplate — Thymeleaf auto-configured with defaults
+ * app.install(new ViewExtension(ViewEngineType.THYMELEAF));
+ * }</pre>
+ *
+ * <h3>Dev mode</h3>
+ * Template caching is <b>disabled</b> when either:
+ * <ul>
+ *   <li>the JVM property {@code flash.env} equals {@code dev} (case-insensitive), or</li>
+ *   <li>the environment variable {@code FLASH_ENV} equals {@code dev}.</li>
+ * </ul>
+ * In all other cases caching is enabled (production default).
+ *
+ * <h3>Adding your own engine</h3>
+ * For unsupported engines, implement {@link ViewEngine} directly and use
+ * {@link ViewExtension#ViewExtension(ViewEngine)} instead.
+ */
+public enum ViewEngineType {
+
+    /**
+     * Thymeleaf 3.x — natural HTML templates with server-side rendering.
+     *
+     * <p>Required dependency (add to your {@code pom.xml}):
+     * <pre>{@code
+     * <dependency>
+     *     <groupId>org.thymeleaf</groupId>
+     *     <artifactId>thymeleaf</artifactId>
+     *     <version>3.1.2.RELEASE</version>
+     * </dependency>
+     * }</pre>
+     *
+     * Default resolver: classpath, prefix {@code /templates/}, suffix {@code .html},
+     * mode {@code HTML}, encoding UTF-8.
+     */
+    THYMELEAF;
+
+    // ── Factory ───────────────────────────────────────────────────────────────
+
+    /**
+     * Instantiates and configures the {@link ViewEngine} for this type.
+     * Called once at {@link ViewExtension#install} time — never on the hot-path.
+     *
+     * @param cacheEnabled whether the engine should cache compiled templates
+     * @throws IllegalStateException if the required library is not on the classpath
+     */
+    ViewEngine createEngine(boolean cacheEnabled) {
+        return switch (this) {
+            case THYMELEAF -> createThymeleaf(cacheEnabled);
+        };
+    }
+
+    // ── Engine factories ──────────────────────────────────────────────────────
+
+    private static ViewEngine createThymeleaf(boolean cacheEnabled) {
+        try {
+            return new ThymeleafEngine(cacheEnabled);
+        } catch (NoClassDefFoundError e) {
+            throw new IllegalStateException("""
+                    Thymeleaf is not on the classpath. \
+                    Add the following dependency to your pom.xml:
+
+                        <dependency>
+                            <groupId>org.thymeleaf</groupId>
+                            <artifactId>thymeleaf</artifactId>
+                            <version>3.1.2.RELEASE</version>
+                        </dependency>
+                    """, e);
+        }
+    }
+}
diff --git a/flash-extensions/flash-ext-view/src/main/java/dev/relism/ext/view/ViewExtension.java b/flash-extensions/flash-ext-view/src/main/java/dev/relism/ext/view/ViewExtension.java
new file mode 100644
index 0000000..458a462
--- /dev/null
+++ b/flash-extensions/flash-ext-view/src/main/java/dev/relism/ext/view/ViewExtension.java
@@ -0,0 +1,166 @@
+package dev.relism.ext.view;
+
+import dev.relism.extension.FlashContext;
+import dev.relism.extension.FlashExtension;
+import dev.relism.extension.FlashRegistrar;
+import dev.relism.http.ContentType;
+import dev.relism.routing.Middleware;
+
+import java.util.List;
+import java.util.Objects;
+
+/**
+ * Installs the view layer into a Flash application.
+ *
+ * <h3>Managed mode (recommended)</h3>
+ * Pass a {@link ViewEngineType} — the extension auto-configures the engine,
+ * detects dev mode for cache settings, and validates classpath dependencies at boot:
+ * <pre>{@code
+ * app.install(new ViewExtension(ViewEngineType.THYMELEAF));
+ * }</pre>
+ *
+ * <h3>Manual mode (BYOE)</h3>
+ * Supply your own {@link ViewEngine} implementation for full control:
+ * <pre>{@code
+ * ViewEngine myEngine = (template, model, fragment) -> { ... };
+ * app.install(new ViewExtension(myEngine));
+ * }</pre>
+ *
+ * <h3>What gets installed</h3>
+ * <ol>
+ *   <li>{@link ViewEngine} and {@link Renderer} are bound in the {@link FlashContext} —
+ *       any handler can retrieve them via {@code require(Renderer.class)}.</li>
+ *   <li>An {@link dev.relism.extension.AnnotationProcessor} is registered: class-based
+ *       handlers carrying {@link View @View} receive an injected rendering middleware
+ *       that intercepts the handler return value, resolves the template + model, and
+ *       delegates to the engine. No boilerplate required in the handler itself.</li>
+ * </ol>
+ *
+ * <h3>Handler patterns</h3>
+ * <pre>{@code
+ * // Declarative — annotation drives template selection
+ * @Route(method = HttpMethod.GET, path = "/")
+ * @View("home")
+ * public class HomeHandler extends RequestHandler {
+ *     public Object handle(Request req, Response res) {
+ *         return Map.of("posts", service.findAll());  // model → home.html
+ *     }
+ * }
+ *
+ * // Dynamic override via Template signal
+ * @View("list")
+ * public class ListHandler extends RequestHandler {
+ *     public Object handle(Request req, Response res) {
+ *         if (error) return Template.of("error", Map.of("msg", "oops"));
+ *         return data;                                // falls back to list.html
+ *     }
+ * }
+ *
+ * // Imperative — explicit render call (lambda-friendly)
+ * Renderer renderer = app.ctx().require(Renderer.class);
+ * app.get("/about", (req, res) -> renderer.view(res, "about"));
+ * }</pre>
+ *
+ * <h3>Dev mode / cache</h3>
+ * In managed mode, template caching is disabled when the JVM property
+ * {@code flash.env=dev} or the environment variable {@code FLASH_ENV=dev} is set.
+ *
+ * <h3>Cross-extension integration</h3>
+ * <pre>{@code
+ * ctx.optional(ViewEngine.class).ifPresent(engine -> { ... });
+ * }</pre>
+ */
+public final class ViewExtension implements FlashExtension {
+
+    private final ViewEngine engine;
+
+    // ── Constructors ──────────────────────────────────────────────────────────
+
+    /**
+     * Managed mode — auto-configures the engine selected by {@code type}.
+     *
+     * <p>Template caching is enabled unless {@code flash.env=dev} (JVM property)
+     * or {@code FLASH_ENV=dev} (environment variable) is set.
+     *
+     * @param type the engine to use; must have its library on the runtime classpath
+     * @throws IllegalStateException at boot time if the library is missing
+     */
+    public ViewExtension(ViewEngineType type) {
+        this(type.createEngine(!isDevMode()));
+    }
+
+    /**
+     * Manual mode — use a pre-constructed {@link ViewEngine} implementation.
+     * Suitable for custom engines or engines that need non-default configuration.
+     *
+     * @param engine the engine implementation; must be thread-safe
+     */
+    public ViewExtension(ViewEngine engine) {
+        this.engine = Objects.requireNonNull(engine, "ViewEngine must not be null");
+    }
+
+    // ── FlashExtension ────────────────────────────────────────────────────────
+
+    @Override
+    public void install(FlashRegistrar app, FlashContext ctx) {
+        Renderer renderer = new Renderer(engine);
+        ctx.provide(ViewEngine.class, engine);
+        ctx.provide(Renderer.class,   renderer);
+
+        ctx.addAnnotationProcessor(handlerClass -> {
+            View view = findView(handlerClass);
+            if (view == null) return List.of();
+
+            String      defaultTemplate = view.value();
+            ContentType contentType     = view.contentType();
+            boolean     fragment        = view.fragment();
+
+            // Injected once per handler at boot — zero overhead on the hot-path.
+            // Intercepts the return value: Template signal overrides name+model;
+            // any other value becomes the model for the annotation's template.
+            Middleware renderingMiddleware = next -> (req, res) -> {
+                Object result = next.handle(req, res);
+                String tpl;
+                Object model;
+                if (result instanceof Template t) {
+                    tpl   = t.name();
+                    model = t.model();
+                } else {
+                    tpl   = defaultTemplate;
+                    model = result;
+                }
+                res.setContentType(contentType);
+                return engine.render(tpl, model, fragment);
+            };
+
+            return List.of(renderingMiddleware);
+        });
+    }
+
+    // ── Helpers ───────────────────────────────────────────────────────────────
+
+    /**
+     * Walks the superclass chain to find {@link View @View}.
+     * Supports inheritance: a base handler can declare the view template and
+     * concrete subclasses inherit it without re-annotating.
+     */
+    private static View findView(Class<?> cls) {
+        while (cls != null && !cls.equals(Object.class)) {
+            View v = cls.getAnnotation(View.class);
+            if (v != null) return v;
+            cls = cls.getSuperclass();
+        }
+        return null;
+    }
+
+    /**
+     * Returns {@code true} when running in dev mode.
+     * Checks JVM property {@code flash.env} first, then env var {@code FLASH_ENV}.
+     */
+    private static boolean isDevMode() {
+        String prop = System.getProperty("flash.env");
+        if (prop != null) return "dev".equalsIgnoreCase(prop);
+        String env  = System.getenv("FLASH_ENV");
+        return "dev".equalsIgnoreCase(env);
+    }
+}
diff --git a/flash-extensions/pom.xml b/flash-extensions/pom.xml
index c6d1f05..018fb52 100644
--- a/flash-extensions/pom.xml
+++ b/flash-extensions/pom.xml
@@ -18,6 +18,8 @@
         <module>flash-ext-openapi</module>
         <module>flash-ext-oidc</module>
         <module>flash-ext-routeviewer</module>
+        <module>flash-ext-view</module>
+        <module>flash-ext-limiter</module>
     </modules>
 
     <dependencyManagement>
diff --git a/flash/src/main/java/dev/relism/HttpServer.java b/flash/src/main/java/dev/relism/HttpServer.java
index 2e67475..30709b8 100644
--- a/flash/src/main/java/dev/relism/HttpServer.java
+++ b/flash/src/main/java/dev/relism/HttpServer.java
@@ -5,11 +5,12 @@ import dev.relism.http.ContentType;
 import dev.relism.http.HttpStatus;
 import dev.relism.models.*;
 import dev.relism.extension.FlashConfiguration;
-import dev.relism.routing.GlobalRouter;
+import dev.relism.routing.AbstractRouter;
 
 import lombok.extern.slf4j.Slf4j;
 
 import java.io.*;
+import java.net.InetSocketAddress;
 import java.net.ServerSocket;
 import java.net.Socket;
 import java.nio.charset.StandardCharsets;
@@ -21,32 +22,32 @@ import java.util.concurrent.Executors;
 import java.util.concurrent.TimeUnit;
 
 /**
- * Pure I/O transport layer. Owns the {@link ServerSocket}, the virtual-thread executor,
- * and the keep-alive accept loop. All routing is delegated to the {@link GlobalRouter}
- * supplied at construction time.
+ * Pure I/O transport layer. Owns the {@link ServerSocket}, the virtual-thread
+ * executor, and the keep-alive accept loop. Routing is delegated to a single
+ * {@link AbstractRouter}.
  *
- * <p>This class is package-private — use {@link dev.relism.extension.FlashApp} as the
- * single entry point for creating and configuring a Flash server.
+ * <p>Package-private : use {@link dev.relism.extension.FlashApp} as the single
+ * entry point.
  */
 @Slf4j
 class HttpServer implements ServerHandle {
 
     private final FlashConfiguration configuration;
-    private final ServerSocket            serverSocket;
-    private final GlobalRouter            globalRouter;
-    private final ExecutorService executorService = Executors.newVirtualThreadPerTaskExecutor();
-    private final Set<Socket> activeSockets = ConcurrentHashMap.newKeySet();
+    private final ServerSocket       serverSocket;
+    private final AbstractRouter     router;
+    private final ExecutorService    executorService = Executors.newVirtualThreadPerTaskExecutor();
+    private final Set<Socket>        activeSockets   = ConcurrentHashMap.newKeySet();
     private volatile boolean stopped = false;
     private final CompletableFuture<Void> readyFuture = new CompletableFuture<>();
 
-    private static final byte[] HTTP_1_1           = "HTTP/1.1 ".getBytes(StandardCharsets.UTF_8);
-    private static final byte[] CRLF               = "\r\n".getBytes(StandardCharsets.UTF_8);
-    private static final byte[] CONTENT_TYPE       = "Content-Type: ".getBytes(StandardCharsets.UTF_8);
-    private static final byte[] CONTENT_LENGTH     = "Content-Length: ".getBytes(StandardCharsets.UTF_8);
-    private static final byte[] CONNECTION_CLOSE    = "Connection: close\r\n".getBytes(StandardCharsets.UTF_8);
+    private static final byte[] HTTP_1_1             = "HTTP/1.1 ".getBytes(StandardCharsets.UTF_8);
+    private static final byte[] CRLF                 = "\r\n".getBytes(StandardCharsets.UTF_8);
+    private static final byte[] CONTENT_TYPE         = "Content-Type: ".getBytes(StandardCharsets.UTF_8);
+    private static final byte[] CONTENT_LENGTH       = "Content-Length: ".getBytes(StandardCharsets.UTF_8);
+    private static final byte[] CONNECTION_CLOSE     = "Connection: close\r\n".getBytes(StandardCharsets.UTF_8);
     private static final byte[] CONNECTION_KEEPALIVE = "Connection: keep-alive\r\n".getBytes(StandardCharsets.UTF_8);
-    private static final byte[] TRANSFER_CHUNKED    = "Transfer-Encoding: chunked\r\n".getBytes(StandardCharsets.UTF_8);
-    private static final byte[] FINAL_CHUNK         = "0\r\n\r\n".getBytes(StandardCharsets.UTF_8);
+    private static final byte[] TRANSFER_CHUNKED     = "Transfer-Encoding: chunked\r\n".getBytes(StandardCharsets.UTF_8);
+    private static final byte[] FINAL_CHUNK          = "0\r\n\r\n".getBytes(StandardCharsets.UTF_8);
     private static final byte[] UNKNOWN_STATUS_SUFFIX = " Unknown".getBytes(StandardCharsets.UTF_8);
 
     private static final byte[][] DIGITS = new byte[10][1];
@@ -55,20 +56,12 @@ class HttpServer implements ServerHandle {
             DIGITS[i] = String.valueOf(i).getBytes(StandardCharsets.UTF_8);
     }
 
-    /**
-     * Creates the transport with a pre-built router. Called exclusively by
-     * {@link dev.relism.extension.FlashApp}.
-     *
-     * @param configuration server configuration (port, host, buffer sizes)
-     * @param globalRouter  the fully-wired router to dispatch requests to
-     */
-    HttpServer(FlashConfiguration configuration, GlobalRouter globalRouter) throws IOException {
+    HttpServer(FlashConfiguration configuration, AbstractRouter router) throws IOException {
         this.configuration = configuration;
         this.serverSocket  = new ServerSocket(configuration.getPort());
-        this.globalRouter  = globalRouter;
+        this.router        = router;
     }
 
-    /** Returns a future that completes once the accept loop is running and the server is ready. */
     @Override
     public CompletableFuture<Void> start() {
         Thread.ofPlatform().name("flash-accept-loop").daemon(false).start(this::run);
@@ -90,15 +83,10 @@ class HttpServer implements ServerHandle {
         }
     }
 
-    /** Closes all active connections and shuts down the executor. Returns when complete. */
     @Override
     public CompletableFuture<Void> stop() {
         stopped = true;
-        try {
-            serverSocket.close();
-        } catch (IOException e) {
-            log.error("Error closing server socket", e);
-        }
+        try { serverSocket.close(); } catch (IOException e) { log.error("Error closing server socket", e); }
         activeSockets.forEach(s -> { try { s.close(); } catch (IOException ignored) {} });
         executorService.shutdown();
         try {
@@ -111,7 +99,7 @@ class HttpServer implements ServerHandle {
         return CompletableFuture.completedFuture(null);
     }
 
-    // ── Hot-path ──────────────────────────────────────────────────────────────
+    // ── Hot-path ─────────────────────────────────────────────────────────────
 
     private void process(Socket socket) {
         activeSockets.add(socket);
@@ -119,36 +107,32 @@ class HttpServer implements ServerHandle {
             try (socket;
                     InputStream in = socket.getInputStream();
                     OutputStream out = new BufferedOutputStream(socket.getOutputStream())) {
-                RequestParser parser = new RequestParser(configuration.getMaxHeaderBufferSize());
+                RequestParser parser = new RequestParser(
+                        configuration.getMaxHeaderBufferSize(),
+                        (InetSocketAddress) socket.getRemoteSocketAddress());
                 while (!stopped) {
                     Request request = parser.parse(in);
-                    if (request == null)
-                        break;
+                    if (request == null) break;
 
                     boolean keepAlive = isKeepAlive(request);
-
                     Response response = new Response(200, ContentType.TEXT_PLAIN);
-                    RequestHandler handler = globalRouter.route(request);
+
+                    RequestHandler handler = router.route(request);
+                    if (handler == null) handler = router.getNotFoundHandler();
 
                     try {
                         Object result = handler.handle(request, response);
-                        if (result instanceof Response r)
-                            response = r;
-                        else if (result != null)
-                            response.setBody(result);
+                        if (result instanceof Response r) response = r;
+                        else if (result != null) response.setBody(result);
                     } catch (Exception ex) {
-                        Object result = globalRouter.resolveExceptionHandler(request).handle(ex, request, response);
-                        if (result instanceof Response r)
-                            response = r;
-                        else if (result != null)
-                            response.setBody(result);
+                        Object result = router.getExceptionHandler().handle(ex, request, response);
+                        if (result instanceof Response r) response = r;
+                        else if (result != null) response.setBody(result);
                     }
 
                     writeResponse(out, response, keepAlive);
                     request.drain();
-
-                    if (!keepAlive)
-                        break;
+                    if (!keepAlive) break;
                 }
             } catch (IOException e) {
                 if (!stopped) {
@@ -170,11 +154,6 @@ class HttpServer implements ServerHandle {
                 || request.headerEquals("Connection", "keep-alive");
     }
 
-    /**
-     * Writes a complete HTTP response. The fixed-body path (the common case for simple handlers
-     * like /plaintext) is kept inline; streaming and chunked bodies are delegated to
-     * {@link #writeStreamingBody} so the JIT can optimise this method aggressively.
-     */
     private static void writeResponse(OutputStream out, Response response, boolean keepAlive) throws IOException {
         out.write(HTTP_1_1);
         byte[] statusBytes = response.getStatusBytes();
diff --git a/flash/src/main/java/dev/relism/RequestParser.java b/flash/src/main/java/dev/relism/RequestParser.java
index abbfe10..da08682 100644
--- a/flash/src/main/java/dev/relism/RequestParser.java
+++ b/flash/src/main/java/dev/relism/RequestParser.java
@@ -10,6 +10,7 @@ import lombok.extern.slf4j.Slf4j;
 
 import java.io.IOException;
 import java.io.InputStream;
+import java.net.InetSocketAddress;
 import java.util.Arrays;
 
 /**
@@ -21,15 +22,18 @@ import java.util.Arrays;
 public class RequestParser {
     private static final int INITIAL_BUFFER_SIZE = 8192;
 
-    private final int maxHeaderBufferSize;
-    private final HeaderMap headerMap = new HeaderMap();
+    private final int             maxHeaderBufferSize;
+    private final InetSocketAddress remoteAddress;        // set once per connection, never changes
+    private final HeaderMap       headerMap = new HeaderMap();
     private byte[] buffer;
     private int bufBase = 0;  // absolute start of valid data in buffer
     private int bufLen  = 0;  // number of valid bytes from bufBase
 
-    public RequestParser() { this(64 * 1024); }
-    public RequestParser(int maxHeaderBufferSize) {
+    public RequestParser() { this(64 * 1024, null); }
+    public RequestParser(int maxHeaderBufferSize) { this(maxHeaderBufferSize, null); }
+    public RequestParser(int maxHeaderBufferSize, InetSocketAddress remoteAddress) {
         this.maxHeaderBufferSize = maxHeaderBufferSize;
+        this.remoteAddress       = remoteAddress;
         this.buffer = new byte[Math.min(INITIAL_BUFFER_SIZE, maxHeaderBufferSize)];
     }
 
@@ -133,9 +137,9 @@ public class RequestParser {
         RequestLine requestLine = new RequestLine(method, pathView, queryView, protocolView, headerMap);
 
         if (isChunked) {
-            return Request.forParsed(requestLine, new ChunkedInputStream(in, buffer, bodyStart, preBufLen), -1L, null, 0, 0);
+            return Request.forParsed(requestLine, new ChunkedInputStream(in, buffer, bodyStart, preBufLen), -1L, null, 0, 0, remoteAddress);
         }
-        return Request.forParsed(requestLine, in, contentLength, buffer, bodyStart, preBufLen);
+        return Request.forParsed(requestLine, in, contentLength, buffer, bodyStart, preBufLen, remoteAddress);
     }
 
     private static int findEndOfHeader(byte[] buf, int from, int len) {
diff --git a/flash/src/main/java/dev/relism/ServerHandle.java b/flash/src/main/java/dev/relism/ServerHandle.java
index bec752f..fa72622 100644
--- a/flash/src/main/java/dev/relism/ServerHandle.java
+++ b/flash/src/main/java/dev/relism/ServerHandle.java
@@ -1,26 +1,22 @@
 package dev.relism;
 
 import dev.relism.extension.FlashConfiguration;
-import dev.relism.routing.GlobalRouter;
+import dev.relism.routing.AbstractRouter;
 
 import java.io.IOException;
 import java.util.concurrent.CompletableFuture;
 
 /**
- * Public handle to the underlying HTTP transport. Returned by {@link #create} so that
- * {@link dev.relism.extension.FlashApp} can start and stop the server without holding
- * a direct reference to the package-private {@link HttpServer}.
+ * Public handle to the underlying HTTP transport. Returned by {@link #create}
+ * so that {@link dev.relism.extension.FlashApp} can start and stop the server
+ * without holding a direct reference to the package-private {@link HttpServer}.
  */
 public interface ServerHandle {
 
     CompletableFuture<Void> start();
     CompletableFuture<Void> stop();
 
-    /**
-     * Creates the HTTP transport. Called exclusively by
-     * {@link dev.relism.extension.FlashApp}.
-     */
-    static ServerHandle create(FlashConfiguration config, GlobalRouter router) throws IOException {
+    static ServerHandle create(FlashConfiguration config, AbstractRouter router) throws IOException {
         return new HttpServer(config, router);
     }
 }
diff --git a/flash/src/main/java/dev/relism/exceptions/DuplicateNamespaceException.java b/flash/src/main/java/dev/relism/exceptions/DuplicateNamespaceException.java
deleted file mode 100644
index 182898d..0000000
--- a/flash/src/main/java/dev/relism/exceptions/DuplicateNamespaceException.java
+++ /dev/null
@@ -1,7 +0,0 @@
-package dev.relism.exceptions;
-
-public class DuplicateNamespaceException extends RuntimeException {
-    public DuplicateNamespaceException(String namespace) {
-        super("Router with namespace '" + namespace + "' is already registered.");
-    }
-}
diff --git a/flash/src/main/java/dev/relism/exceptions/InitializationException.java b/flash/src/main/java/dev/relism/exceptions/InitializationException.java
new file mode 100644
index 0000000..5a5e084
--- /dev/null
+++ b/flash/src/main/java/dev/relism/exceptions/InitializationException.java
@@ -0,0 +1,18 @@
+package dev.relism.exceptions;
+
+/**
+ * Thrown at boot time when Flash detects a configuration or registration error.
+ *
+ * <p>Fail-fast: a clear crash at startup is always preferable to a server that
+ * starts "empty" and silently drops routes.
+ */
+public class InitializationException extends RuntimeException {
+
+    public InitializationException(String message) {
+        super(message);
+    }
+
+    public InitializationException(String message, Throwable cause) {
+        super(message, cause);
+    }
+}
diff --git a/flash/src/main/java/dev/relism/extension/AnnotationProcessor.java b/flash/src/main/java/dev/relism/extension/AnnotationProcessor.java
index 2744c71..7f0c81d 100644
--- a/flash/src/main/java/dev/relism/extension/AnnotationProcessor.java
+++ b/flash/src/main/java/dev/relism/extension/AnnotationProcessor.java
@@ -14,7 +14,7 @@ import java.util.List;
  * valid — processors may also use the call purely for side effects
  * (e.g. collecting OpenAPI metadata).
  *
- * <p>Register processors via {@link ExtensionContext#addAnnotationProcessor}.
+ * <p>Register processors via {@link FlashContext#addAnnotationProcessor}.
  */
 @FunctionalInterface
 public interface AnnotationProcessor {
diff --git a/flash/src/main/java/dev/relism/extension/FlashApp.java b/flash/src/main/java/dev/relism/extension/FlashApp.java
index 69fb22f..9276c66 100644
--- a/flash/src/main/java/dev/relism/extension/FlashApp.java
+++ b/flash/src/main/java/dev/relism/extension/FlashApp.java
@@ -1,14 +1,15 @@
 package dev.relism.extension;
 
 import dev.relism.ServerHandle;
+import dev.relism.exceptions.InitializationException;
 import dev.relism.http.HttpMethod;
 import dev.relism.models.RequestHandler;
 import dev.relism.models.SimpleHandler;
 import dev.relism.routing.AbstractRouter;
-import dev.relism.routing.GlobalRouter;
 import dev.relism.routing.Middleware;
 import dev.relism.routing.Route;
 import dev.relism.routing.RouteHandle;
+import dev.relism.routing.routers.fastpathrouter.FastPathRouterImpl;
 
 import java.io.IOException;
 import java.util.ArrayList;
@@ -16,98 +17,62 @@ import java.util.Arrays;
 import java.util.List;
 import java.util.concurrent.CompletableFuture;
 import java.util.function.Consumer;
-import java.util.stream.Stream;
 
 /**
- * Primary entry point for Flash. Creates and owns both the {@link GlobalRouter} and
- * the {@link HttpServer} (pure I/O transport). All route registration goes through
- * {@code FlashApp} or a {@link FlashScope} — never through the server or router directly.
+ * Single entry point for Flash. Owns one flat {@link FastPathRouterImpl} —
+ * all routes (app-level and scoped) compile into a single FSM at {@link #start()}.
  *
- * <p>Create via the static factories:
- * <pre>{@code
- * FlashApp app = FlashApp.create(8080);
- * FlashApp app = FlashApp.create(FlashConfiguration.builder().port(8080).build());
- * }</pre>
+ * <h3>Deferred routing</h3>
+ * Routes accumulate during the builder phase. At {@code start()}:
+ * <ol>
+ *   <li>Global middlewares are prepended to every route</li>
+ *   <li>Annotation processors run for class-based handlers</li>
+ *   <li>Handlers are bound to the {@link FlashContext}</li>
+ *   <li>All routes compile into one FSM — zero prefix scanning at runtime</li>
+ * </ol>
  *
- * <p>Install extensions, register routes, mount namespaces, then start:
  * <pre>{@code
  * FlashApp.create(8080)
  *     .install(new JacksonExtension())
- *     .install(new OidcExtension(config))
+ *     .use(cors)
  *     .get("/ping", (req, res) -> "pong")
- *     .get("/me",   (req, res) -> ClaimsHolder.user().email()).with(oidc.protect())
- *     .register(new HomePage())                 // @Route + annotation processors applied
- *     .scan("dev.example.handlers")             // classpath scan, no-arg constructors
- *     .mount("/api", scope -> {
- *         scope.register(new UserHandler());    // @Authenticated works here
- *         scope.get("/health", (req, res) -> "ok");
- *     })
+ *     .scan("dev.example.handlers")
+ *     .mount("/api", scope -> scope.get("/health", (req, res) -> "ok"))
  *     .start();
  * }</pre>
- *
- * <h3>Auto-flush</h3>
- * Calling any registration method returns a {@link RouteHandle}. Calling
- * {@link RouteHandle#with} is optional — if omitted, the route is registered
- * automatically before the next operation or at {@link #start()}. This means
- * trailing {@code .with()} calls are never required for routes with no middleware.
  */
 public final class FlashApp implements FlashRegistrar {
 
-    private final GlobalRouter     router;
-    private final ServerHandle     server;
-    private final ExtensionContext ctx = new ExtensionContext();
+    private final AbstractRouter          router = new FastPathRouterImpl();
+    private final ServerHandle            server;
+    private final FlashContext         ctx    = new FlashContext();
+    private final List<Middleware>         globalMiddlewares = new ArrayList<>();
+    private final List<RouteDefinition>   deferredRoutes    = new ArrayList<>();
 
-    /** The last returned RouteHandle not yet registered — auto-flushed before the next operation. */
     private RouteHandle<?> pending;
 
-    /**
-     * Global middlewares applied to every route, regardless of how it is registered
-     * (lambda, class-based, or via {@link #scan}).
-     * Accumulated via {@link #use}; applied outermost in the chain (before injected and
-     * explicit middlewares).
-     */
-    private final List<Middleware> globalMiddlewares = new ArrayList<>();
-
     private FlashApp(FlashConfiguration config) {
-        this.router = new GlobalRouter();
         try {
             this.server = ServerHandle.create(config, router);
         } catch (IOException e) {
-            throw new RuntimeException("Failed to bind server socket on port " + config.getPort(), e);
+            throw new InitializationException("Failed to bind on port " + config.getPort(), e);
         }
     }
 
     // ── Factories ─────────────────────────────────────────────────────────────
 
-    /**
-     * Creates a {@code FlashApp} listening on {@code port} with default configuration.
-     *
-     * @param port the TCP port to bind
-     */
     public static FlashApp create(int port) {
         return create(FlashConfiguration.builder().port(port).build());
     }
 
-    /**
-     * Creates a {@code FlashApp} with full server configuration.
-     *
-     * @param config server configuration (port, host, buffer sizes, etc.)
-     */
     public static FlashApp create(FlashConfiguration config) {
         return new FlashApp(config);
     }
 
     // ── Pending flush ─────────────────────────────────────────────────────────
 
-    /**
-     * Registers any pending route (from the previous {@code get/post/register} call)
-     * with no middleware if it has not already been committed via {@link RouteHandle#with}.
-     */
     private void flushPending() {
-        if (pending != null) {
-            pending.ensureRegistered();
-            pending = null;
-        }
+        if (pending != null) { pending.ensureRegistered(); pending = null; }
     }
 
     private <P> RouteHandle<P> track(RouteHandle<P> handle) {
@@ -116,15 +81,8 @@ public final class FlashApp implements FlashRegistrar {
         return handle;
     }
 
-    // ── FlashRegistrar — extension installation ───────────────────────────────
+    // ── Extension installation ────────────────────────────────────────────────
 
-    /**
-     * Installs an extension. Extensions receive this {@code FlashApp} as a
-     * {@link FlashRegistrar} so they can register routes and expose services.
-     *
-     * @param ext the extension to install
-     * @return {@code this} for chaining
-     */
     @Override
     public FlashApp install(FlashExtension ext) {
         flushPending();
@@ -132,34 +90,12 @@ public final class FlashApp implements FlashRegistrar {
         return this;
     }
 
-    // ── Global middleware ──────────────────────────────────────────────────────
+    // ── Global middleware ─────────────────────────────────────────────────────
 
     /**
-     * Registers one or more global middlewares applied to <em>every</em> route on this app,
-     * regardless of how the route is registered (lambda, class-based, or via {@link #scan}).
-     *
-     * <p>Global middlewares execute outermost — before annotation-injected middlewares
-     * (e.g. {@code @Authenticated}) and before any explicit {@link RouteHandle#with} chain.
-     * Execution order mirrors the declaration order: the first argument wraps everything else.
-     *
-     * <p>Must be called before {@link #start()}. Calling {@code use} after routes have already
-     * been registered will not retroactively affect those routes.
-     *
-     * <pre>{@code
-     * Middleware cors = next -> (req, res) -> {
-     *     res.header("Access-Control-Allow-Origin", "*");
-     *     if (req.method() == HttpMethod.OPTIONS) { res.status(204); return null; }
-     *     return next.handle(req, res);
-     * };
-     *
-     * FlashApp.create(8080)
-     *     .use(cors)
-     *     .scan("dev.example.handlers")
-     *     .start();
-     * }</pre>
-     *
-     * @param middlewares one or more middlewares to apply globally
-     * @return {@code this} for chaining
+     * Registers global middlewares applied to <em>every</em> route — including
+     * routes registered before this call and routes inside mounted scopes.
+     * Order-independent: resolved at {@link #start()}.
      */
     public FlashApp use(Middleware... middlewares) {
         flushPending();
@@ -167,182 +103,157 @@ public final class FlashApp implements FlashRegistrar {
         return this;
     }
 
-    /**
-     * Prepends global middlewares to an explicit per-route array.
-     * Returns {@code explicit} unchanged when no global middlewares have been registered
-     * (zero-allocation fast path).
-     */
-    private Middleware[] withGlobal(Middleware[] explicit) {
-        if (globalMiddlewares.isEmpty()) return explicit;
-        return Stream.concat(globalMiddlewares.stream(), Arrays.stream(explicit))
-                     .toArray(Middleware[]::new);
-    }
+    // ── Route registration (deferred) ─────────────────────────────────────────
 
-    // ── FlashRegistrar — route registration ───────────────────────────────────
+    @Override public RouteHandle<FlashApp> get    (String path, SimpleHandler.FunctionalHandler h) { return lambda(HttpMethod.GET,     path, h); }
+    @Override public RouteHandle<FlashApp> post   (String path, SimpleHandler.FunctionalHandler h) { return lambda(HttpMethod.POST,    path, h); }
+    @Override public RouteHandle<FlashApp> put    (String path, SimpleHandler.FunctionalHandler h) { return lambda(HttpMethod.PUT,     path, h); }
+    @Override public RouteHandle<FlashApp> delete (String path, SimpleHandler.FunctionalHandler h) { return lambda(HttpMethod.DELETE,  path, h); }
+    @Override public RouteHandle<FlashApp> patch  (String path, SimpleHandler.FunctionalHandler h) { return lambda(HttpMethod.PATCH,   path, h); }
+    @Override public RouteHandle<FlashApp> options(String path, SimpleHandler.FunctionalHandler h) { return lambda(HttpMethod.OPTIONS, path, h); }
+    @Override public RouteHandle<FlashApp> head   (String path, SimpleHandler.FunctionalHandler h) { return lambda(HttpMethod.HEAD,    path, h); }
+    @Override public RouteHandle<FlashApp> trace  (String path, SimpleHandler.FunctionalHandler h) { return lambda(HttpMethod.TRACE,   path, h); }
+    @Override public RouteHandle<FlashApp> connect(String path, SimpleHandler.FunctionalHandler h) { return lambda(HttpMethod.CONNECT, path, h); }
+    @Override public RouteHandle<FlashApp> purge  (String path, SimpleHandler.FunctionalHandler h) { return lambda(HttpMethod.PURGE,   path, h); }
 
-    @Override public RouteHandle<FlashApp> get    (String path, SimpleHandler.FunctionalHandler h) { return routeLambda(HttpMethod.GET,     path, h); }
-    @Override public RouteHandle<FlashApp> post   (String path, SimpleHandler.FunctionalHandler h) { return routeLambda(HttpMethod.POST,    path, h); }
-    @Override public RouteHandle<FlashApp> put    (String path, SimpleHandler.FunctionalHandler h) { return routeLambda(HttpMethod.PUT,     path, h); }
-    @Override public RouteHandle<FlashApp> delete (String path, SimpleHandler.FunctionalHandler h) { return routeLambda(HttpMethod.DELETE,  path, h); }
-    @Override public RouteHandle<FlashApp> patch  (String path, SimpleHandler.FunctionalHandler h) { return routeLambda(HttpMethod.PATCH,   path, h); }
-    @Override public RouteHandle<FlashApp> options(String path, SimpleHandler.FunctionalHandler h) { return routeLambda(HttpMethod.OPTIONS, path, h); }
-    @Override public RouteHandle<FlashApp> head   (String path, SimpleHandler.FunctionalHandler h) { return routeLambda(HttpMethod.HEAD,    path, h); }
-    @Override public RouteHandle<FlashApp> trace  (String path, SimpleHandler.FunctionalHandler h) { return routeLambda(HttpMethod.TRACE,   path, h); }
-    @Override public RouteHandle<FlashApp> connect(String path, SimpleHandler.FunctionalHandler h) { return routeLambda(HttpMethod.CONNECT, path, h); }
-    @Override public RouteHandle<FlashApp> purge  (String path, SimpleHandler.FunctionalHandler h) { return routeLambda(HttpMethod.PURGE,   path, h); }
+    private static final Middleware[] NO_MW = new Middleware[0];
 
-    private RouteHandle<FlashApp> routeLambda(HttpMethod method, String path, SimpleHandler.FunctionalHandler h) {
-        return track(new RouteHandle<>(this, m -> {
-            Middleware[] all = withGlobal(m);
-            emit(method, path, null, List.of(), all);
-            router.doRegister(method, path, h, all);
-        }));
+    private RouteHandle<FlashApp> lambda(HttpMethod method, String path, SimpleHandler.FunctionalHandler h) {
+        return track(new RouteHandle<>(this, mw ->
+                deferredRoutes.add(new RouteDefinition(method, path, new SimpleHandler(h), NO_MW, mw, false, ctx, "/"))));
     }
 
     /**
-     * Begins registration of a class-based handler. The class must carry a
-     * {@link Route @Route} annotation. All registered {@link AnnotationProcessor}s
-     * are run (e.g. to inject {@code @Authenticated} / {@code @RolesAllowed} middleware).
-     * Injected middlewares are prepended outermost to any explicit ones passed via
-     * {@link RouteHandle#with}.
-     *
-     * <p>Calling {@link RouteHandle#with} is optional — the route is registered
-     * automatically before the next operation or at {@link #start()}.
+     * Registers a class-based handler annotated with {@link Route @Route}.
+     * App-level only — not part of {@link FlashRegistrar}.
      */
-    @Override
     public RouteHandle<FlashApp> register(RequestHandler handler) {
-        return track(new RouteHandle<>(this, explicit -> {
-            List<Middleware> injected = ctx.processors().stream()
-                    .flatMap(p -> p.process(handler.getClass()).stream())
-                    .toList();
-            Middleware[] all = Stream.concat(
-                    globalMiddlewares.stream(),
-                    Stream.concat(injected.stream(), Arrays.stream(explicit))
-            ).toArray(Middleware[]::new);
-            Route ann = handler.getClass().getAnnotation(Route.class);
-            if (ann != null) emit(ann.method(), ann.path(), handler.getClass(), injected, withGlobal(explicit));
-            router.doRegister(handler, all);
-        }));
+        Route ann = handler.getClass().getAnnotation(Route.class);
+        if (ann == null)
+            throw new InitializationException(
+                    handler.getClass().getName() + " is missing @Route");
+        return track(new RouteHandle<>(this, mw ->
+                deferredRoutes.add(new RouteDefinition(ann.method(), ann.path(), handler, NO_MW, mw, true, ctx, "/"))));
     }
 
-    /**
-     * Scans {@code packageName} for classes that extend {@link RequestHandler} and
-     * carry {@link Route @Route}. Each is instantiated via its no-arg constructor,
-     * run through annotation processors, and registered.
-     *
-     * <pre>{@code
-     * FlashApp.create(8080)
-     *     .install(new OidcExtension(config))
-     *     .scan("dev.example.handlers");  // @Authenticated / @RolesAllowed auto-applied
-     * }</pre>
-     */
     @Override
     public FlashApp scan(String packageName) {
         flushPending();
-        PackageScanner.findHandlers(packageName).forEach(cls -> register(instantiate(cls)).ensureRegistered());
+        PackageScanner.findHandlers(packageName).forEach(cls ->
+                register(instantiate(cls)).ensureRegistered());
         return this;
     }
 
-    // ── Namespace mounting ────────────────────────────────────────────────────
+    // ── Namespace mounting (syntactic sugar — routes go into same flat router) ─
 
     /**
-     * Mounts a scoped sub-router under {@code namespace}. The {@code configure} consumer
-     * receives a {@link FlashScope} that has its own child {@link ExtensionContext}
-     * inheriting all parent services and annotation processors.
-     *
-     * <p>Routes registered on the scope automatically get the namespace prefix prepended.
-     * Annotation processors (e.g. from OIDC) apply identically inside the scope.
-     *
-     * <pre>{@code
-     * app.mount("/api", scope -> {
-     *     scope.register(new UserHandler());    // @Authenticated works
-     *     scope.get("/health", (req, res) -> "ok");
-     *     scope.scan("dev.example.api");
-     * });
-     * }</pre>
-     *
-     * @param namespace the path prefix (e.g. {@code "/api"})
-     * @param configure consumer that registers routes on the scope
+     * Mounts a scoped group of routes under {@code namespace}. The scope is a
+     * pure builder — it prepends the namespace to each path and collects
+     * {@link RouteDefinition}s that merge into this app's single flat router.
      */
     public FlashApp mount(String namespace, Consumer<FlashScope> configure) {
         flushPending();
-        FlashScope scope = new FlashScope(new dev.relism.routing.routers.fastpathrouter.FastPathRouterImpl(),
-                namespace, ctx);
+        FlashScope scope = new FlashScope(namespace, ctx);
         configure.accept(scope);
         scope.flush();
-        router.mount(namespace, scope.router());
+        deferredRoutes.addAll(scope.routes());
         return this;
     }
 
-    // ── FlashRegistrar — error handlers ──────────────────────────────────────
+    // ── Error handlers ────────────────────────────────────────────────────────
 
-    @Override
     public FlashApp onException(AbstractRouter.ExceptionHandler handler) {
         flushPending();
         router.onException(handler);
         return this;
     }
 
-    @Override
     public FlashApp onNotFound(SimpleHandler.FunctionalHandler handler) {
         flushPending();
         router.onNotFound(handler);
         return this;
     }
 
-    // ── FlashRegistrar — context ──────────────────────────────────────────────
-
     @Override
-    public ExtensionContext ctx() {
-        return ctx;
-    }
+    public FlashContext ctx() { return ctx; }
 
     // ── Lifecycle ─────────────────────────────────────────────────────────────
 
     /**
-     * Flushes any pending route registration and starts the HTTP server.
-     *
-     * @return a future that completes once the accept loop is running
+     * Compiles all deferred routes into the flat FSM router, then starts
+     * the HTTP transport. One pass, one router, zero prefix scanning.
      */
     public CompletableFuture<Void> start() {
         flushPending();
+        compile();
         return server.start();
     }
 
-    /** Stops the HTTP server and closes all active connections. */
-    public CompletableFuture<Void> stop() {
-        return server.stop();
+    public CompletableFuture<Void> stop() { return server.stop(); }
+
+    // ── Compilation ──────────────────────────────────────────────────────────
+
+    /**
+     * Compiles all deferred routes. Middleware chain order:
+     * Global → Scope → Annotation (class-based only) → Explicit (.with).
+     */
+    private void compile() {
+        for (RouteDefinition def : deferredRoutes) {
+            List<Middleware> injected;
+            if (def.classBasedHandler()) {
+                injected = def.ctx().processors().stream()
+                        .flatMap(p -> p.process(def.handler().getClass()).stream())
+                        .toList();
+                def.handler().bind(def.ctx());
+            } else {
+                injected = List.of();
+            }
+
+            Middleware[] all = concat(globalMiddlewares, def.scopeMiddlewares(),
+                    injected, def.explicitMiddlewares());
+            emitEvent(def, all);
+            router.doRegister(def.method(), def.path(), def.handler(), all);
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    private void emitEvent(RouteDefinition def, Middleware[] allMiddlewares) {
+        List<RouteListener> listeners = def.ctx().routeListeners();
+        if (listeners.isEmpty()) return;
+
+        List<Class<? extends Middleware>> chain = new ArrayList<>(allMiddlewares.length);
+        for (Middleware m : allMiddlewares)
+            chain.add((Class<? extends Middleware>) m.getClass());
+
+        Class<?> handlerClass = def.classBasedHandler() ? def.handler().getClass() : null;
+        RouteEvent event = new RouteEvent(def.method(), def.path(), def.namespace(),
+                "FlashApp", handlerClass, List.copyOf(chain));
+        listeners.forEach(l -> l.onRoute(event));
     }
 
     // ── Internals ─────────────────────────────────────────────────────────────
 
-    @SuppressWarnings("unchecked")
+    private static Middleware[] concat(List<Middleware> global, Middleware[] scope,
+                                       List<Middleware> injected, Middleware[] explicit) {
+        int total = global.size() + scope.length + injected.size() + explicit.length;
+        if (total == 0) return NO_MW;
+        if (total == explicit.length && scope.length == 0) return explicit;
+        Middleware[] all = new Middleware[total];
+        int i = 0;
+        for (Middleware m : global)   all[i++] = m;
+        for (Middleware m : scope)    all[i++] = m;
+        for (Middleware m : injected) all[i++] = m;
+        System.arraycopy(explicit, 0, all, i, explicit.length);
+        return all;
+    }
+
     private static RequestHandler instantiate(Class<?> cls) {
         try {
             return (RequestHandler) cls.getDeclaredConstructor().newInstance();
         } catch (Exception e) {
-            throw new RuntimeException("Failed to instantiate handler: " + cls.getName() +
+            throw new InitializationException(
+                    "Failed to instantiate " + cls.getName() +
                     " — ensure it has a public no-arg constructor", e);
         }
     }
-
-    /**
-     * Emits a {@link RouteEvent} to all registered {@link RouteListener}s.
-     * No-op if no listener has been registered (fast empty-list check).
-     * Called once per route at boot time — never on the request hot-path.
-     */
-    @SuppressWarnings("unchecked")
-    private void emit(HttpMethod method, String path, Class<?> handlerClass,
-                      List<Middleware> injected, Middleware[] explicit) {
-        List<RouteListener> listeners = ctx.routeListeners();
-        if (listeners.isEmpty()) return;
-        Middleware[] routerMws = router.routerMiddlewares();
-        List<Class<? extends Middleware>> chain = new ArrayList<>(routerMws.length + injected.size() + explicit.length);
-        for (Middleware m : routerMws) chain.add((Class<? extends Middleware>) m.getClass());
-        for (Middleware m : injected)  chain.add((Class<? extends Middleware>) m.getClass());
-        for (Middleware m : explicit)  chain.add((Class<? extends Middleware>) m.getClass());
-        RouteEvent event = new RouteEvent(method, path, router.getNamespace(),
-                router.getClass().getSimpleName(), handlerClass, List.copyOf(chain));
-        listeners.forEach(l -> l.onRoute(event));
-    }
 }
diff --git a/flash/src/main/java/dev/relism/extension/ExtensionContext.java b/flash/src/main/java/dev/relism/extension/FlashContext.java
similarity index 54%
rename from flash/src/main/java/dev/relism/extension/ExtensionContext.java
rename to flash/src/main/java/dev/relism/extension/FlashContext.java
index c9200bd..0be26fd 100644
--- a/flash/src/main/java/dev/relism/extension/ExtensionContext.java
+++ b/flash/src/main/java/dev/relism/extension/FlashContext.java
@@ -4,46 +4,42 @@ import java.util.*;
 import java.util.stream.Stream;
 
 /**
- * Shared registry passed to every extension during {@link FlashExtension#install}.
- * Extensions use it in two ways:
+ * Central service registry and boot-time hook coordinator.
+ *
+ * <p>Every handler, extension, and scope shares one (or a child of one) {@code FlashContext}.
+ * It provides three capabilities:
  * <ol>
- *   <li><b>Service sharing</b> — provide/require typed objects (e.g. {@code ObjectMapper},
- *       {@code OpenApiBuilder}) so extensions can build on each other.</li>
- *   <li><b>Annotation processing</b> — register {@link AnnotationProcessor}s that
- *       are invoked for every handler, injecting middleware derived from
- *       annotations ({@code @RolesAllowed}, {@code @Authenticated}, etc.).</li>
+ *   <li><b>Service registry</b> — typed {@link #provide}/{@link #require}/{@link #find}.</li>
+ *   <li><b>Annotation processors</b> — middleware injection from handler annotations.</li>
+ *   <li><b>Route listeners</b> — boot-time observation of the route graph.</li>
  * </ol>
  *
- * <p>A child context (created via {@link #child()}) inherits all services and processors
- * from its parent. Services provided and processors added on the child are scoped to it
- * and not visible in the parent or sibling scopes.
+ * <p>A child context (via {@link #child()}) inherits parent services and processors.
+ * Services provided on the child are scoped and invisible to the parent.
  */
-public class ExtensionContext {
+public class FlashContext {
 
-    private final ExtensionContext parent;
+    private final FlashContext parent;
     private final Map<Class<?>, Object>     registry       = new LinkedHashMap<>();
     private final List<AnnotationProcessor> processors     = new ArrayList<>();
     private final List<RouteListener>       routeListeners = new ArrayList<>();
 
-    public ExtensionContext() {
+    public FlashContext() {
         this.parent = null;
     }
 
-    private ExtensionContext(ExtensionContext parent) {
+    private FlashContext(FlashContext parent) {
         this.parent = parent;
     }
 
-    /**
-     * Creates a child context that inherits this context's services and processors.
-     * Services provided and processors added on the child do not affect the parent.
-     */
-    public ExtensionContext child() {
-        return new ExtensionContext(this);
+    /** Creates a child context that inherits this context's services and processors. */
+    public FlashContext child() {
+        return new FlashContext(this);
     }
 
     // ── Service registry ─────────────────────────────────────────────────────
 
-    /** Stores {@code instance} under {@code type} for retrieval by other extensions. */
+    /** Stores {@code instance} under {@code type} for retrieval via {@link #require} or {@link #find}. */
     public <T> void provide(Class<T> type, T instance) {
         registry.put(type, instance);
     }
@@ -51,7 +47,8 @@ public class ExtensionContext {
     /**
      * Retrieves the service registered under {@code type}.
      * Checks own scope first, then the parent chain.
-     * Throws {@link IllegalStateException} if not found — install order matters.
+     *
+     * @throws IllegalStateException if not found
      */
     @SuppressWarnings("unchecked")
     public <T> T require(Class<T> type) {
@@ -59,12 +56,12 @@ public class ExtensionContext {
         if (val == null && parent != null) val = parent.find(type).orElse(null);
         if (val == null)
             throw new IllegalStateException(
-                    "Extension dependency not found: " + type.getSimpleName() +
-                    " — install the required extension first");
+                    "Service not found: " + type.getSimpleName() +
+                    " — provide it via FlashContext.provide() or install the required extension");
         return val;
     }
 
-    /** Returns the service under {@code type}, or empty if not installed in this scope or any parent. */
+    /** Returns the service under {@code type}, or empty if not provided in this scope or any parent. */
     @SuppressWarnings("unchecked")
     public <T> Optional<T> find(Class<T> type) {
         T val = (T) registry.get(type);
@@ -72,21 +69,26 @@ public class ExtensionContext {
         return parent != null ? parent.find(type) : Optional.empty();
     }
 
+    /**
+     * Returns the service registered under {@code type} as an {@link Optional},
+     * or {@link Optional#empty()} if not present in this scope or any parent.
+     *
+     * <p>Semantically identical to {@link #find} — prefer this name for expressive call sites
+     * ({@code ctx.optional(ViewEngine.class).ifPresent(...)}). Respects the parent-first
+     * scope hierarchy: own registry is checked first, then the parent chain.
+     */
+    public <T> Optional<T> optional(Class<T> type) {
+        return find(type);
+    }
+
     // ── Annotation processors ────────────────────────────────────────────────
 
-    /**
-     * Registers an {@link AnnotationProcessor}. Called by extensions during
-     * {@link FlashExtension#install}. Processors are invoked in registration order
-     * (parent processors first, then own).
-     */
+    /** Registers an {@link AnnotationProcessor}. Processors run once per class-based handler at boot. */
     public void addAnnotationProcessor(AnnotationProcessor processor) {
         processors.add(processor);
     }
 
-    /**
-     * Returns all processors visible from this context: parent processors first,
-     * then processors added directly to this context.
-     */
+    /** All processors visible from this context: parent-first, then own. */
     List<AnnotationProcessor> processors() {
         if (parent == null) return Collections.unmodifiableList(processors);
         List<AnnotationProcessor> parentProcessors = parent.processors();
@@ -96,22 +98,12 @@ public class ExtensionContext {
 
     // ── Route listeners ──────────────────────────────────────────────────────
 
-    /**
-     * Registers a {@link RouteListener} that will be notified once for every route
-     * registered on this context's {@link dev.relism.extension.FlashApp} or any
-     * {@link dev.relism.extension.FlashScope} that inherits from it.
-     *
-     * <p>Call this inside {@link FlashExtension#install} to observe all routes.
-     * If no listener is registered the emission path is a no-op.
-     */
+    /** Registers a boot-time {@link RouteListener}. Zero overhead on the request hot-path. */
     public void addRouteListener(RouteListener listener) {
         routeListeners.add(listener);
     }
 
-    /**
-     * Returns all route listeners visible from this context: parent listeners first,
-     * then listeners added directly to this context.
-     */
+    /** All route listeners visible from this context: parent-first, then own. */
     List<RouteListener> routeListeners() {
         if (parent == null) return Collections.unmodifiableList(routeListeners);
         List<RouteListener> parentListeners = parent.routeListeners();
diff --git a/flash/src/main/java/dev/relism/extension/FlashExtension.java b/flash/src/main/java/dev/relism/extension/FlashExtension.java
index 5dd7199..d2535ef 100644
--- a/flash/src/main/java/dev/relism/extension/FlashExtension.java
+++ b/flash/src/main/java/dev/relism/extension/FlashExtension.java
@@ -3,17 +3,17 @@ package dev.relism.extension;
 /**
  * Contract for all Flash extensions. An extension receives a {@link FlashRegistrar}
  * (either a {@link FlashApp} or a {@link FlashScope}) so it can register routes and
- * expose shared services via {@link ExtensionContext}.
+ * expose shared services via {@link FlashContext}.
  *
  * <p>Extensions work identically whether installed at the top-level app or inside a
  * mounted scope:
  *
  * <pre>{@code
  * public class RateLimitExtension implements FlashExtension {
- *     public void install(FlashRegistrar app, ExtensionContext ctx) {
+ *     public void install(FlashRegistrar app, FlashContext ctx) {
  *         RateLimiter limiter = new RateLimiter(100);
  *         ctx.provide(RateLimiter.class, limiter);
- *         app.onException((ex, req, res) -> { ... });
+ *         app.get("/rate-info", (req, res) -> limiter.info());
  *     }
  * }
  *
@@ -28,5 +28,5 @@ package dev.relism.extension;
  */
 @FunctionalInterface
 public interface FlashExtension {
-    void install(FlashRegistrar app, ExtensionContext ctx);
+    void install(FlashRegistrar app, FlashContext ctx);
 }
diff --git a/flash/src/main/java/dev/relism/extension/FlashRegistrar.java b/flash/src/main/java/dev/relism/extension/FlashRegistrar.java
index f573f6f..7943a0c 100644
--- a/flash/src/main/java/dev/relism/extension/FlashRegistrar.java
+++ b/flash/src/main/java/dev/relism/extension/FlashRegistrar.java
@@ -1,23 +1,17 @@
 package dev.relism.extension;
 
-import dev.relism.models.RequestHandler;
 import dev.relism.models.SimpleHandler;
-import dev.relism.routing.AbstractRouter;
 import dev.relism.routing.RouteHandle;
 
 /**
  * Common registration surface shared by {@link FlashApp} and {@link FlashScope}.
  *
- * <p>{@link FlashExtension#install} receives a {@code FlashRegistrar} so that extensions
+ * <p>{@link FlashExtension#install} receives a {@code FlashRegistrar} so extensions
  * work identically whether installed at the top-level app or inside a mounted scope.
  *
- * <p>Route registration follows the auto-flush pattern: calling any registration method
- * without a subsequent {@link RouteHandle#with} is equivalent to calling
- * {@code .with()} with no arguments — the route is registered with no middleware.
- *
  * <pre>{@code
  * // In an extension:
- * public void install(FlashRegistrar app, ExtensionContext ctx) {
+ * public void install(FlashRegistrar app, FlashContext ctx) {
  *     app.get("/health", (req, res) -> "ok");
  *     app.get("/secured", (req, res) -> user()).with(oidc.protect());
  * }
@@ -25,11 +19,9 @@ import dev.relism.routing.RouteHandle;
  */
 public interface FlashRegistrar {
 
-    // ── Extension installation ────────────────────────────────────────────────
-
     FlashRegistrar install(FlashExtension ext);
 
-    // ── Route registration ────────────────────────────────────────────────────
+    // ── Lambda route registration ────────────────────────────────────────────
 
     RouteHandle<?> get    (String path, SimpleHandler.FunctionalHandler h);
     RouteHandle<?> post   (String path, SimpleHandler.FunctionalHandler h);
@@ -43,29 +35,13 @@ public interface FlashRegistrar {
     RouteHandle<?> purge  (String path, SimpleHandler.FunctionalHandler h);
 
     /**
-     * Begins registration of a class-based handler. The class must carry a
-     * {@link dev.relism.routing.Route @Route} annotation. Annotation processors
-     * (e.g. {@code @Authenticated}, {@code @RolesAllowed}) are applied automatically.
-     *
-     * <p>Calling {@link RouteHandle#with} is optional — the route is registered
-     * automatically before the next operation or at {@code start()}.
-     */
-    RouteHandle<?> register(RequestHandler h);
-
-    /**
-     * Scans {@code packageName} for classes that extend {@link RequestHandler} and
-     * carry {@link dev.relism.routing.Route @Route}. Each is instantiated via its
+     * Scans {@code packageName} for classes that extend
+     * {@link dev.relism.models.RequestHandler} and carry
+     * {@link dev.relism.routing.Route @Route}. Each is instantiated via its
      * no-arg constructor, run through annotation processors, and registered.
      */
     FlashRegistrar scan(String packageName);
 
-    // ── Error handlers ────────────────────────────────────────────────────────
-
-    FlashRegistrar onException(AbstractRouter.ExceptionHandler h);
-    FlashRegistrar onNotFound(SimpleHandler.FunctionalHandler h);
-
-    // ── Context access ────────────────────────────────────────────────────────
-
-    /** Returns the {@link ExtensionContext} for this registrar (app or scope). */
-    ExtensionContext ctx();
+    /** Returns the {@link FlashContext} for this registrar. */
+    FlashContext ctx();
 }
diff --git a/flash/src/main/java/dev/relism/extension/FlashScope.java b/flash/src/main/java/dev/relism/extension/FlashScope.java
index ba40e42..ed36729 100644
--- a/flash/src/main/java/dev/relism/extension/FlashScope.java
+++ b/flash/src/main/java/dev/relism/extension/FlashScope.java
@@ -1,62 +1,43 @@
 package dev.relism.extension;
 
+import dev.relism.exceptions.InitializationException;
 import dev.relism.http.HttpMethod;
 import dev.relism.models.RequestHandler;
 import dev.relism.models.SimpleHandler;
-import dev.relism.routing.AbstractRouter;
+import dev.relism.routing.Middleware;
 import dev.relism.routing.PathUtils;
 import dev.relism.routing.Route;
 import dev.relism.routing.RouteHandle;
-import dev.relism.routing.Middleware;
 
-import java.io.File;
-import java.net.URL;
 import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.Enumeration;
 import java.util.List;
-import java.util.jar.JarEntry;
-import java.util.jar.JarFile;
-import java.util.stream.Stream;
 
 /**
- * Scoped registration context for a mounted sub-router namespace.
- *
- * <p>Obtained via {@link FlashApp#mount(String, java.util.function.Consumer)}.
- * A scope has its own child {@link ExtensionContext} that inherits all services and
- * annotation processors from the parent app, so extensions like {@code @Authenticated}
- * and {@code @RolesAllowed} work identically inside a scope.
- *
- * <p>Extensions installed on a scope are scoped to that namespace and not visible
- * in the parent or sibling scopes.
+ * Scoped builder for namespace-prefixed routes. Pure syntactic sugar —
+ * does not own a router. Collected routes merge into {@link FlashApp}'s
+ * single flat router at {@link FlashApp#start()}.
  *
  * <pre>{@code
  * app.mount("/api", scope -> {
- *     scope.install(new RateLimitExtension());
- *     scope.register(new UserHandler());   // @Authenticated auto-injected
- *     scope.get("/health", (req, res) -> "ok");
+ *     scope.use(authMiddleware);
+ *     scope.get("/health", (req, res) -> "ok");   // → GET /api/health
  *     scope.scan("dev.example.api.handlers");
  * });
  * }</pre>
  */
 public final class FlashScope implements FlashRegistrar {
 
-    private final AbstractRouter  router;
-    private final String          namespace;
-    private final ExtensionContext ctx;
+    private final String                namespace;
+    private final FlashContext      ctx;
+    private final List<Middleware>      scopeMiddlewares = new ArrayList<>();
+    private final List<RouteDefinition> deferredRoutes   = new ArrayList<>();
+
+    private static final Middleware[] NO_MW = new Middleware[0];
 
-    /** Pending RouteHandle awaiting .with() — auto-flushed before each new registration. */
     private RouteHandle<?> pending;
 
-    /**
-     * Package-private — only {@link FlashApp} creates scopes.
-     *
-     * @param router    the sub-router that will receive routes registered on this scope
-     * @param namespace the namespace prefix (e.g. {@code "/api"})
-     * @param parentCtx the parent app's ExtensionContext — a child is created from it
-     */
-    FlashScope(AbstractRouter router, String namespace, ExtensionContext parentCtx) {
-        this.router    = router;
+    FlashScope(String namespace, FlashContext parentCtx) {
         this.namespace = namespace;
         this.ctx       = parentCtx.child();
     }
@@ -64,10 +45,7 @@ public final class FlashScope implements FlashRegistrar {
     // ── Pending flush ─────────────────────────────────────────────────────────
 
     private void flushPending() {
-        if (pending != null) {
-            pending.ensureRegistered();
-            pending = null;
-        }
+        if (pending != null) { pending.ensureRegistered(); pending = null; }
     }
 
     private <P> RouteHandle<P> track(RouteHandle<P> handle) {
@@ -76,12 +54,20 @@ public final class FlashScope implements FlashRegistrar {
         return handle;
     }
 
-    // ── FlashRegistrar — extension installation ───────────────────────────────
+    // ── Scope middleware ──────────────────────────────────────────────────────
 
     /**
-     * Installs an extension scoped to this namespace.
-     * The extension registers routes and services on this scope only.
+     * Adds middlewares applied to every route in this scope.
+     * Combined at compile time in order: Global → Scope → Annotation → Explicit.
      */
+    public FlashScope use(Middleware... middlewares) {
+        flushPending();
+        scopeMiddlewares.addAll(Arrays.asList(middlewares));
+        return this;
+    }
+
+    // ── Extension installation ────────────────────────────────────────────────
+
     @Override
     public FlashScope install(FlashExtension ext) {
         flushPending();
@@ -89,128 +75,73 @@ public final class FlashScope implements FlashRegistrar {
         return this;
     }
 
-    // ── FlashRegistrar — route registration ───────────────────────────────────
+    // ── Route registration (deferred) ─────────────────────────────────────────
 
-    @Override public RouteHandle<FlashScope> get    (String path, SimpleHandler.FunctionalHandler h) { return routeLambda(HttpMethod.GET,     path, h); }
-    @Override public RouteHandle<FlashScope> post   (String path, SimpleHandler.FunctionalHandler h) { return routeLambda(HttpMethod.POST,    path, h); }
-    @Override public RouteHandle<FlashScope> put    (String path, SimpleHandler.FunctionalHandler h) { return routeLambda(HttpMethod.PUT,     path, h); }
-    @Override public RouteHandle<FlashScope> delete (String path, SimpleHandler.FunctionalHandler h) { return routeLambda(HttpMethod.DELETE,  path, h); }
-    @Override public RouteHandle<FlashScope> patch  (String path, SimpleHandler.FunctionalHandler h) { return routeLambda(HttpMethod.PATCH,   path, h); }
-    @Override public RouteHandle<FlashScope> options(String path, SimpleHandler.FunctionalHandler h) { return routeLambda(HttpMethod.OPTIONS, path, h); }
-    @Override public RouteHandle<FlashScope> head   (String path, SimpleHandler.FunctionalHandler h) { return routeLambda(HttpMethod.HEAD,    path, h); }
-    @Override public RouteHandle<FlashScope> trace  (String path, SimpleHandler.FunctionalHandler h) { return routeLambda(HttpMethod.TRACE,   path, h); }
-    @Override public RouteHandle<FlashScope> connect(String path, SimpleHandler.FunctionalHandler h) { return routeLambda(HttpMethod.CONNECT, path, h); }
-    @Override public RouteHandle<FlashScope> purge  (String path, SimpleHandler.FunctionalHandler h) { return routeLambda(HttpMethod.PURGE,   path, h); }
+    @Override public RouteHandle<FlashScope> get    (String path, SimpleHandler.FunctionalHandler h) { return lambda(HttpMethod.GET,     path, h); }
+    @Override public RouteHandle<FlashScope> post   (String path, SimpleHandler.FunctionalHandler h) { return lambda(HttpMethod.POST,    path, h); }
+    @Override public RouteHandle<FlashScope> put    (String path, SimpleHandler.FunctionalHandler h) { return lambda(HttpMethod.PUT,     path, h); }
+    @Override public RouteHandle<FlashScope> delete (String path, SimpleHandler.FunctionalHandler h) { return lambda(HttpMethod.DELETE,  path, h); }
+    @Override public RouteHandle<FlashScope> patch  (String path, SimpleHandler.FunctionalHandler h) { return lambda(HttpMethod.PATCH,   path, h); }
+    @Override public RouteHandle<FlashScope> options(String path, SimpleHandler.FunctionalHandler h) { return lambda(HttpMethod.OPTIONS, path, h); }
+    @Override public RouteHandle<FlashScope> head   (String path, SimpleHandler.FunctionalHandler h) { return lambda(HttpMethod.HEAD,    path, h); }
+    @Override public RouteHandle<FlashScope> trace  (String path, SimpleHandler.FunctionalHandler h) { return lambda(HttpMethod.TRACE,   path, h); }
+    @Override public RouteHandle<FlashScope> connect(String path, SimpleHandler.FunctionalHandler h) { return lambda(HttpMethod.CONNECT, path, h); }
+    @Override public RouteHandle<FlashScope> purge  (String path, SimpleHandler.FunctionalHandler h) { return lambda(HttpMethod.PURGE,   path, h); }
 
-    private RouteHandle<FlashScope> routeLambda(HttpMethod method, String path, SimpleHandler.FunctionalHandler h) {
-        return track(new RouteHandle<>(this, m -> {
-            String full = ns(path);
-            emit(method, full, null, List.of(), m);
-            router.doRegister(method, full, h, m);
-        }));
+    private RouteHandle<FlashScope> lambda(HttpMethod method, String path, SimpleHandler.FunctionalHandler h) {
+        String full = ns(path);
+        Middleware[] scopeMw = snapshotScopeMiddlewares();
+        return track(new RouteHandle<>(this, mw ->
+                deferredRoutes.add(new RouteDefinition(method, full, new SimpleHandler(h), scopeMw, mw, false, ctx, namespace))));
     }
 
     /**
-     * Begins registration of a class-based handler. Annotation processors from the
-     * parent app and any installed on this scope are applied. The {@link Route @Route}
-     * path is prepended with this scope's namespace automatically.
-     *
-     * <p>Calling {@link RouteHandle#with} is optional — the route is registered
-     * automatically before the next operation or when the scope consumer returns.
+     * Registers a class-based handler annotated with {@link Route @Route}.
+     * Not part of {@link FlashRegistrar} — scope-only convenience.
      */
-    @Override
-    public RouteHandle<FlashScope> register(RequestHandler handler) {
-        return track(new RouteHandle<>(this, explicit -> {
-            List<Middleware> injected = ctx.processors().stream()
-                    .flatMap(p -> p.process(handler.getClass()).stream())
-                    .toList();
-            Middleware[] all = injected.isEmpty()
-                    ? explicit
-                    : Stream.concat(injected.stream(), Arrays.stream(explicit)).toArray(Middleware[]::new);
-            Route annotation = handler.getClass().getAnnotation(Route.class);
-            if (annotation != null) {
-                String full = ns(annotation.path());
-                emit(annotation.method(), full, handler.getClass(), injected, explicit);
-                router.doRegister(annotation.method(), full, (RequestHandler) handler, all);
-            }
-        }));
+    RouteHandle<FlashScope> register(RequestHandler handler) {
+        Route ann = handler.getClass().getAnnotation(Route.class);
+        if (ann == null)
+            throw new InitializationException(
+                    handler.getClass().getName() + " is missing @Route");
+        String full = ns(ann.path());
+        Middleware[] scopeMw = snapshotScopeMiddlewares();
+        return track(new RouteHandle<>(this, mw ->
+                deferredRoutes.add(new RouteDefinition(ann.method(), full, handler, scopeMw, mw, true, ctx, namespace))));
     }
 
-    /**
-     * Scans {@code packageName} for {@link RequestHandler} subclasses annotated with
-     * {@link Route @Route}. Each is instantiated via its no-arg constructor and registered
-     * with this scope's namespace prefix and annotation processors applied.
-     */
     @Override
     public FlashScope scan(String packageName) {
         flushPending();
-        PackageScanner.findHandlers(packageName).forEach(cls -> register(instantiate(cls)).ensureRegistered());
+        PackageScanner.findHandlers(packageName).forEach(cls ->
+                register(instantiate(cls)).ensureRegistered());
         return this;
     }
 
     @Override
-    public FlashScope onException(AbstractRouter.ExceptionHandler h) {
-        flushPending();
-        router.onException(h);
-        return this;
-    }
+    public FlashContext ctx() { return ctx; }
 
-    @Override
-    public FlashScope onNotFound(SimpleHandler.FunctionalHandler h) {
-        flushPending();
-        router.onNotFound(h);
-        return this;
-    }
+    // ── Internals (called by FlashApp.mount) ──────────────────────────────────
 
-    @Override
-    public ExtensionContext ctx() {
-        return ctx;
-    }
+    void flush() { flushPending(); }
 
-    // ── Internals ─────────────────────────────────────────────────────────────
+    List<RouteDefinition> routes() { return deferredRoutes; }
 
-    /** Ensures any pending route is registered when the scope consumer returns. */
-    void flush() {
-        flushPending();
-    }
-
-    /** Returns the sub-router for GlobalRouter to mount. */
-    AbstractRouter router() {
-        return router;
-    }
-
-    /** Prepends this scope's namespace to the given path. */
     private String ns(String path) {
         return namespace + PathUtils.sanitize(path);
     }
 
-    @SuppressWarnings("unchecked")
+    private Middleware[] snapshotScopeMiddlewares() {
+        return scopeMiddlewares.isEmpty() ? NO_MW : scopeMiddlewares.toArray(NO_MW);
+    }
+
     private static RequestHandler instantiate(Class<?> cls) {
         try {
             return (RequestHandler) cls.getDeclaredConstructor().newInstance();
         } catch (Exception e) {
-            throw new RuntimeException("Failed to instantiate handler: " + cls.getName() +
+            throw new InitializationException(
+                    "Failed to instantiate " + cls.getName() +
                     " — ensure it has a public no-arg constructor", e);
         }
     }
-
-    /**
-     * Emits a {@link RouteEvent} to all {@link RouteListener}s visible from this scope's context.
-     * Parent-level listeners (registered on the app) are included via context inheritance.
-     * No-op if no listener has been registered. Never called on the request hot-path.
-     */
-    @SuppressWarnings("unchecked")
-    private void emit(HttpMethod method, String path, Class<?> handlerClass,
-                      List<Middleware> injected, Middleware[] explicit) {
-        List<RouteListener> listeners = ctx.routeListeners();
-        if (listeners.isEmpty()) return;
-        Middleware[] routerMws = router.routerMiddlewares();
-        List<Class<? extends Middleware>> chain = new ArrayList<>(routerMws.length + injected.size() + explicit.length);
-        for (Middleware m : routerMws) chain.add((Class<? extends Middleware>) m.getClass());
-        for (Middleware m : injected)  chain.add((Class<? extends Middleware>) m.getClass());
-        for (Middleware m : explicit)  chain.add((Class<? extends Middleware>) m.getClass());
-        RouteEvent event = new RouteEvent(method, path, namespace,
-                router.getClass().getSimpleName(), handlerClass, List.copyOf(chain));
-        listeners.forEach(l -> l.onRoute(event));
-    }
 }
diff --git a/flash/src/main/java/dev/relism/extension/PackageScanner.java b/flash/src/main/java/dev/relism/extension/PackageScanner.java
index 21031e1..fb6126c 100644
--- a/flash/src/main/java/dev/relism/extension/PackageScanner.java
+++ b/flash/src/main/java/dev/relism/extension/PackageScanner.java
@@ -1,5 +1,6 @@
 package dev.relism.extension;
 
+import dev.relism.exceptions.InitializationException;
 import dev.relism.models.RequestHandler;
 import dev.relism.routing.Route;
 
@@ -15,6 +16,10 @@ import java.util.jar.JarFile;
  * Minimal classpath scanner used by {@link FlashApp#scan} and {@link FlashScope#scan}.
  * Finds all classes in a package that extend {@link RequestHandler} and carry {@link Route @Route}.
  * Supports both exploded directories (development) and fat JARs (deployment).
+ *
+ * <p><b>Fail-fast:</b> if the package does not exist, contains no handlers, or a handler
+ * class cannot be loaded, an {@link InitializationException} is thrown immediately.
+ * A clear crash at boot is always preferable to a server that starts "empty".
  */
 final class PackageScanner {
 
@@ -22,55 +27,84 @@ final class PackageScanner {
 
     /**
      * Returns all {@link RequestHandler} subclasses in {@code packageName} that carry
-     * {@link Route @Route} and have a public no-arg constructor.
+     * {@link Route @Route}.
+     *
+     * @throws InitializationException if the package is empty, does not exist, or a
+     *                                  handler class fails to load
      */
     static List<Class<?>> findHandlers(String packageName) {
+        if (packageName == null || packageName.isBlank())
+            throw new InitializationException("scan() called with null or blank package name");
+
         String resourcePath = packageName.replace('.', '/');
         ClassLoader cl = Thread.currentThread().getContextClassLoader();
         List<Class<?>> result = new ArrayList<>();
+        List<String> errors = new ArrayList<>();
+        boolean packageFound = false;
+
         try {
             Enumeration<URL> resources = cl.getResources(resourcePath);
             while (resources.hasMoreElements()) {
+                packageFound = true;
                 URL url = resources.nextElement();
                 String protocol = url.getProtocol();
                 if ("file".equals(protocol)) {
-                    scanDirectory(new File(url.toURI()), packageName, cl, result);
+                    scanDirectory(new File(url.toURI()), packageName, cl, result, errors);
                 } else if ("jar".equals(protocol)) {
                     String jarPath = url.getPath();
-                    // jar:file:/path/to/app.jar!/com/example → /path/to/app.jar
                     String filePart = jarPath.substring(jarPath.indexOf("file:") + 5, jarPath.indexOf('!'));
                     try (JarFile jar = new JarFile(filePart)) {
-                        scanJar(jar, resourcePath, packageName, cl, result);
+                        scanJar(jar, resourcePath, packageName, cl, result, errors);
                     }
                 }
             }
+        } catch (InitializationException e) {
+            throw e; // re-throw our own exceptions
         } catch (Exception e) {
-            throw new RuntimeException("Failed to scan package: " + packageName, e);
+            throw new InitializationException("Failed to scan package: " + packageName, e);
         }
+
+        if (!packageFound)
+            throw new InitializationException(
+                    "scan(\"" + packageName + "\") — package not found on classpath. " +
+                    "Verify the package name and ensure the module is on the classpath.");
+
+        if (!errors.isEmpty())
+            throw new InitializationException(
+                    "scan(\"" + packageName + "\") — failed to load " + errors.size() + " handler(s):\n  • " +
+                    String.join("\n  • ", errors));
+
+        if (result.isEmpty())
+            throw new InitializationException(
+                    "scan(\"" + packageName + "\") — no @Route handlers found. " +
+                    "Ensure handler classes extend RequestHandler, carry @Route, are not abstract, " +
+                    "and have a public no-arg constructor.");
+
         return result;
     }
 
-    private static void scanDirectory(File dir, String packageName, ClassLoader cl, List<Class<?>> result) {
+    private static void scanDirectory(File dir, String packageName, ClassLoader cl,
+                                       List<Class<?>> result, List<String> errors) {
         File[] files = dir.listFiles();
         if (files == null) return;
         for (File file : files) {
             if (file.isDirectory()) {
-                scanDirectory(file, packageName + '.' + file.getName(), cl, result);
+                scanDirectory(file, packageName + '.' + file.getName(), cl, result, errors);
             } else if (file.getName().endsWith(".class") && !isAnonymous(file.getName())) {
                 String className = packageName + '.' + file.getName().replace(".class", "");
-                tryLoad(className, cl, result);
+                tryLoad(className, cl, result, errors);
             }
         }
     }
 
     private static void scanJar(JarFile jar, String resourcePath, String packageName,
-                                  ClassLoader cl, List<Class<?>> result) {
+                                  ClassLoader cl, List<Class<?>> result, List<String> errors) {
         Enumeration<JarEntry> entries = jar.entries();
         while (entries.hasMoreElements()) {
             String name = entries.nextElement().getName();
             if (name.startsWith(resourcePath) && name.endsWith(".class") && !isAnonymous(name)) {
                 String className = name.replace('/', '.').replace(".class", "");
-                tryLoad(className, cl, result);
+                tryLoad(className, cl, result, errors);
             }
         }
     }
@@ -84,23 +118,34 @@ final class PackageScanner {
     private static boolean isAnonymous(String fileName) {
         int dollar = fileName.lastIndexOf('$');
         if (dollar < 0) return false;
-        // skip past any extra '$' (lambda desugaring may produce '$$Lambda$...')
         int next = dollar + 1;
         while (next < fileName.length() && fileName.charAt(next) == '$') next++;
         return next < fileName.length() && Character.isDigit(fileName.charAt(next));
     }
 
-    private static void tryLoad(String className, ClassLoader cl, List<Class<?>> result) {
+    private static void tryLoad(String className, ClassLoader cl,
+                                 List<Class<?>> result, List<String> errors) {
         try {
             Class<?> cls = cl.loadClass(className);
-            if (RequestHandler.class.isAssignableFrom(cls)
-                    && cls.isAnnotationPresent(Route.class)
-                    && !java.lang.reflect.Modifier.isAbstract(cls.getModifiers())) {
-                cls.getDeclaredConstructor(); // verify no-arg constructor exists
-                result.add(cls);
+            if (!RequestHandler.class.isAssignableFrom(cls)) return;
+            if (java.lang.reflect.Modifier.isAbstract(cls.getModifiers())) return;
+            if (!cls.isAnnotationPresent(Route.class)) return;
+
+            // Verify no-arg constructor exists — fail-fast if missing
+            try {
+                cls.getDeclaredConstructor();
+            } catch (NoSuchMethodException e) {
+                errors.add(className + " — missing public no-arg constructor");
+                return;
             }
-        } catch (Exception | Error ignored) {
-            // Skip classes that cannot be loaded or don't meet criteria
+
+            result.add(cls);
+        } catch (ClassNotFoundException e) {
+            errors.add(className + " — class not found: " + e.getMessage());
+        } catch (NoClassDefFoundError e) {
+            errors.add(className + " — missing dependency: " + e.getMessage());
+        } catch (LinkageError e) {
+            errors.add(className + " — linkage error: " + e.getMessage());
         }
     }
 }
diff --git a/flash/src/main/java/dev/relism/extension/RouteDefinition.java b/flash/src/main/java/dev/relism/extension/RouteDefinition.java
new file mode 100644
index 0000000..813b6fb
--- /dev/null
+++ b/flash/src/main/java/dev/relism/extension/RouteDefinition.java
@@ -0,0 +1,32 @@
+package dev.relism.extension;
+
+import dev.relism.http.HttpMethod;
+import dev.relism.models.RequestHandler;
+import dev.relism.routing.Middleware;
+
+/**
+ * Immutable snapshot of a route captured during the builder phase.
+ *
+ * <p>Accumulated by {@link FlashApp} and {@link FlashScope}. All definitions —
+ * regardless of origin — are compiled into a single flat router at
+ * {@link FlashApp#start()}.
+ *
+ * @param method              HTTP method
+ * @param path                fully resolved path (namespace already prepended for scope routes)
+ * @param handler             SimpleHandler for lambdas, user handler for class-based
+ * @param scopeMiddlewares    middlewares from {@link FlashScope#use} (empty for app-level routes)
+ * @param explicitMiddlewares middlewares from {@link dev.relism.routing.RouteHandle#with}
+ * @param classBasedHandler   true → needs annotation processing + context binding
+ * @param ctx                 the FlashContext for this route's binding and processors
+ * @param namespace           logical namespace for route events ("/" for app, "/api" for scope, etc.)
+ */
+record RouteDefinition(
+        HttpMethod method,
+        String path,
+        RequestHandler handler,
+        Middleware[] scopeMiddlewares,
+        Middleware[] explicitMiddlewares,
+        boolean classBasedHandler,
+        FlashContext ctx,
+        String namespace
+) {}
diff --git a/flash/src/main/java/dev/relism/extension/RouteListener.java b/flash/src/main/java/dev/relism/extension/RouteListener.java
index dd6f3ee..f655e2e 100644
--- a/flash/src/main/java/dev/relism/extension/RouteListener.java
+++ b/flash/src/main/java/dev/relism/extension/RouteListener.java
@@ -3,7 +3,7 @@ package dev.relism.extension;
 /**
  * Observer notified once for each route registered on a {@link FlashApp} or {@link FlashScope}.
  *
- * <p>Register via {@link ExtensionContext#addRouteListener}. The listener is called
+ * <p>Register via {@link FlashContext#addRouteListener}. The listener is called
  * <em>once per route at boot time</em>, before the route is handed to the routing engine.
  * There is zero overhead on the request hot-path.
  *
diff --git a/flash/src/main/java/dev/relism/models/Request.java b/flash/src/main/java/dev/relism/models/Request.java
index 0facd30..eac3462 100644
--- a/flash/src/main/java/dev/relism/models/Request.java
+++ b/flash/src/main/java/dev/relism/models/Request.java
@@ -10,6 +10,7 @@ import lombok.Value;
 import lombok.experimental.NonFinal;
 
 import java.io.InputStream;
+import java.net.InetSocketAddress;
 import java.nio.charset.StandardCharsets;
 import java.util.List;
 
@@ -43,24 +44,42 @@ public class Request {
     @NonFinal @Setter PathParams  pathParams;
     @NonFinal @Setter QueryParams queryParams;
 
-    private Request(RequestLine requestLine, RequestBody body) {
-        this.requestLine = requestLine;
-        this.body        = body;
-        this.pathParams  = null;
-        this.queryParams = null;
+    /**
+     * Remote socket address of the connected client. Set once at connection time from
+     * {@link java.net.Socket#getRemoteSocketAddress()} — the {@link InetSocketAddress}
+     * object already exists in the JDK and is passed by reference: zero allocation,
+     * zero copy. {@code null} only in test-constructed requests.
+     *
+     * <p>Use {@link #remoteAddress()} to access it. String conversion
+     * ({@code .getAddress().getHostAddress()}) is deferred to the caller — lazy and
+     * only paid when actually needed.
+     */
+    @Getter(lombok.AccessLevel.NONE)
+    @EqualsAndHashCode.Exclude
+    @ToString.Exclude
+    InetSocketAddress remoteAddress;
+
+    private Request(RequestLine requestLine, RequestBody body, InetSocketAddress remoteAddress) {
+        this.requestLine   = requestLine;
+        this.body          = body;
+        this.pathParams    = null;
+        this.queryParams   = null;
+        this.remoteAddress = remoteAddress;
     }
 
+    /** Test / manual constructor — {@code remoteAddress()} returns {@code null}. */
     public Request(RequestLine requestLine, byte[] body) {
-        this(requestLine, RequestBody.of(body));
+        this(requestLine, RequestBody.of(body), null);
     }
 
     public static Request forParsed(RequestLine requestLine, InputStream stream,
                                     long contentLength, byte[] headerBuf,
-                                    int bodyStart, int preBufLen) {
+                                    int bodyStart, int preBufLen,
+                                    InetSocketAddress remoteAddress) {
         RequestBody rb = contentLength > 0  ? new RequestBody(stream, contentLength, headerBuf, bodyStart, preBufLen)
                        : contentLength == 0 ? RequestBody.empty()
                        : /* chunked */        new RequestBody(stream, -1L, null, 0, 0);
-        return new Request(requestLine, rb);
+        return new Request(requestLine, rb, remoteAddress);
     }
 
     // ── Request line ──────────────────────────────────────────────────────────
@@ -126,6 +145,22 @@ public class Request {
      */
     public List<String> queries(String name) { return resolveQueryParams().getAll(name); }
 
+    // ── Remote address ────────────────────────────────────────────────────────
+
+    /**
+     * Returns the remote socket address of the connected client, or {@code null}
+     * for test-constructed requests.
+     *
+     * <p>The {@link InetSocketAddress} is the JDK object created during
+     * {@link java.net.ServerSocket#accept()} — no allocation occurs here.
+     * To obtain the IP string (lazy, allocates once):
+     * <pre>{@code
+     * InetSocketAddress addr = req.remoteAddress();
+     * if (addr != null) String ip = addr.getAddress().getHostAddress();
+     * }</pre>
+     */
+    public InetSocketAddress remoteAddress() { return remoteAddress; }
+
     // ── Body ──────────────────────────────────────────────────────────────────
 
     /**
diff --git a/flash/src/main/java/dev/relism/models/RequestHandler.java b/flash/src/main/java/dev/relism/models/RequestHandler.java
index 310eaf0..fa29cc4 100644
--- a/flash/src/main/java/dev/relism/models/RequestHandler.java
+++ b/flash/src/main/java/dev/relism/models/RequestHandler.java
@@ -1,17 +1,134 @@
 package dev.relism.models;
 
+import dev.relism.extension.FlashContext;
+
+import java.util.Optional;
+
 /**
  * Base class for class-based route handlers.
  *
  * <p>Annotate the subclass with {@link dev.relism.routing.Route @Route} and register it
- * via {@link dev.relism.routing.AbstractRouter#register}. For one-off routes, prefer the
- * lambda DSL ({@code server.get(path, handler)}) which wraps a {@link SimpleHandler} internally.
+ * via {@link dev.relism.extension.FlashApp#register} or {@link dev.relism.extension.FlashApp#scan}.
+ * For one-off routes, prefer the lambda DSL ({@code app.get(path, handler)}).
+ *
+ * <h3>Lifecycle</h3>
+ * <ol>
+ *   <li>Instantiation — no-arg constructor (for scan) or manual {@code new Handler(...)}</li>
+ *   <li>{@link #bind} — called once by the framework at {@code start()}, injects the
+ *       {@link FlashContext} and invokes {@link #onInit()}</li>
+ *   <li>{@link #handle} — called on every matching request (hot-path, zero-alloc)</li>
+ * </ol>
+ *
+ * <h3>Service access</h3>
+ * Override {@link #onInit()} to cache services from the {@link FlashContext}
+ * into private fields. This keeps the hot-path ({@code handle}) free of map lookups.
+ *
+ * <pre>{@code
+ * @Route(method = HttpMethod.GET, path = "/users")
+ * public class UserHandler extends RequestHandler {
+ *     private UserService users;
+ *
+ *     @Override protected void onInit() {
+ *         users = require(UserService.class);
+ *     }
+ *
+ *     @Override public Object handle(Request req, Response res) {
+ *         return users.findAll();
+ *     }
+ * }
+ * }</pre>
  */
 public abstract class RequestHandler {
+
+    private FlashContext ctx;
+
+    /**
+     * Called once by the framework after instantiation, before the first request.
+     * Injects the {@link FlashContext} and triggers {@link #onInit()}.
+     *
+     * <p><b>Infrastructure method</b> — do not call from user code.
+     * Use {@link dev.relism.extension.FlashApp#register} or
+     * {@link dev.relism.extension.FlashApp#scan} instead.
+     */
+    public final void bind(FlashContext ctx) {
+        this.ctx = ctx;
+        onInit();
+    }
+
+    /**
+     * Override to cache services at boot time. Called once after {@link #bind},
+     * before any request reaches this handler.
+     *
+     * <p>Use {@link #require} and {@link #find} to retrieve services from the
+     * {@link FlashContext}. Cache them in private fields so the hot-path
+     * ({@link #handle}) has zero lookup overhead.
+     *
+     * <p><b>Important:</b> if your class extends another handler base (e.g.
+     * {@code JacksonHandler}), call {@code super.onInit()} first so the parent
+     * can initialise its own services.
+     *
+     * <pre>{@code
+     * @Override protected void onInit() {
+     *     super.onInit();
+     *     myService = require(MyService.class);
+     * }
+     * }</pre>
+     */
+    protected void onInit() {}
+
+    /**
+     * Retrieves a required service from the {@link FlashContext}.
+     * Throws {@link IllegalStateException} if the service is not registered or
+     * this handler has not been bound yet.
+     *
+     * <p>Typically called inside {@link #onInit()} to cache the result.
+     *
+     * @param type the service class
+     * @param <T>  the service type
+     * @return the service instance, never null
+     */
+    protected <T> T require(Class<T> type) {
+        checkBound();
+        return ctx.require(type);
+    }
+
+    /**
+     * Looks up an optional service from the {@link FlashContext}.
+     *
+     * @param type the service class
+     * @param <T>  the service type
+     * @return the service, or empty if not registered
+     */
+    protected <T> Optional<T> find(Class<T> type) {
+        checkBound();
+        return ctx.find(type);
+    }
+
+    /**
+     * Looks up an optional service from the {@link FlashContext}.
+     * Identical to {@link #find} — prefer this name for expressive call sites
+     * ({@code optional(ViewEngine.class).ifPresent(...)}).
+     *
+     * @param type the service class
+     * @param <T>  the service type
+     * @return the service, or empty if not registered
+     */
+    protected <T> Optional<T> optional(Class<T> type) {
+        checkBound();
+        return ctx.optional(type);
+    }
+
+    private void checkBound() {
+        if (ctx == null)
+            throw new IllegalStateException(
+                    getClass().getSimpleName() + " has not been bound to a FlashContext — " +
+                    "register via FlashApp.register() or FlashApp.scan(), not directly on the router");
+    }
+
     /**
      * Handles an incoming request. The return value determines the response body:
      * return a {@link Response} to replace the whole response, any other non-null value
      * to set it as the body, or {@code null} to leave the response as-is.
      */
     public abstract Object handle(Request request, Response response) throws Exception;
-}
\ No newline at end of file
+}
diff --git a/flash/src/main/java/dev/relism/routing/AbstractRouter.java b/flash/src/main/java/dev/relism/routing/AbstractRouter.java
index 870dfc7..f906bbf 100644
--- a/flash/src/main/java/dev/relism/routing/AbstractRouter.java
+++ b/flash/src/main/java/dev/relism/routing/AbstractRouter.java
@@ -1,53 +1,24 @@
 package dev.relism.routing;
 
-import dev.relism.fpr.core.ByteView;
 import dev.relism.http.ContentType;
 import dev.relism.http.HttpMethod;
+import dev.relism.fpr.core.ByteView;
 import dev.relism.models.*;
 import dev.relism.template.ErrorPages;
 
-import lombok.AccessLevel;
-import lombok.Getter;
-
-import java.nio.charset.StandardCharsets;
-
 /**
- * Base router. Each router has a namespace prefix (default {@code "/"}).
- * Error handlers are scoped to this router.
+ * Base router contract. Owns error handlers and the compile-time middleware
+ * wrapping logic. The only concrete implementation is
+ * {@link dev.relism.routing.routers.fastpathrouter.FastPathRouterImpl}.
  *
- * <p>Router-level {@link Middleware middlewares} are passed at construction time and
- * pre-fused into a single wrapper applied to every handler registered on this router.
- * Handler-level middlewares are passed to {@link #doRegister} and wrapped
- * <em>inside</em> the router-level chain.
+ * <p>All middleware composition happens once at boot time; the hot-path sees
+ * only a plain {@link RequestHandler} call with zero allocation overhead.
  *
- * <p>All middleware composition happens once at boot time; the hot-path sees only a plain
- * {@link RequestHandler} call with zero allocation and zero lookup overhead.
- *
- * <p><b>Registration</b>: use {@link dev.relism.extension.FlashApp} or
- * {@link dev.relism.extension.FlashScope} — they are the public registration API.
- * {@link #doRegister} is an infrastructure method for those entry points.
+ * <p><b>Registration</b>: use {@link dev.relism.extension.FlashApp} — the single
+ * public registration API. {@link #doRegister} is an infrastructure method.
  */
 public abstract class AbstractRouter {
 
-    @Getter
-    protected String namespace = "/";
-
-    @Getter(AccessLevel.PACKAGE)
-    protected byte[] namespaceBytes = new byte[]{ '/' };
-
-    /**
-     * Pre-fused router-level middleware, or {@code null} when none were registered.
-     * A single null-check in {@link #compile} is the only cost when no router middleware exists.
-     */
-    private final Middleware   routerMiddleware;
-
-    /**
-     * Raw router-level middleware array, kept for route event emission by
-     * {@link dev.relism.extension.FlashApp} and {@link dev.relism.extension.FlashScope}.
-     * Never mutated after construction. Not used on the hot-path.
-     */
-    private final Middleware[] rawRouterMiddlewares;
-
     protected SimpleHandler notFoundHandler = new SimpleHandler((req, res) -> {
         res.setStatusCode(404);
         res.setContentType(ContentType.TEXT_HTML);
@@ -60,113 +31,44 @@ public abstract class AbstractRouter {
         return ErrorPages.renderException(req, ex);
     };
 
-    /**
-     * Constructs a router with optional router-level middlewares.
-     * Middlewares are pre-fused at construction time; the first element executes outermost.
-     *
-     * @param middlewares zero or more middlewares applied to every handler on this router
-     */
-    protected AbstractRouter(Middleware... middlewares) {
-        this.rawRouterMiddlewares = middlewares;
-        this.routerMiddleware = middlewares.length == 0 ? null
-                              : middlewares.length == 1 ? middlewares[0]
-                              : Middleware.of(middlewares);
-    }
+    public SimpleHandler    getNotFoundHandler()  { return notFoundHandler; }
+    public ExceptionHandler getExceptionHandler() { return exceptionHandler; }
 
-    /**
-     * Returns the raw router-level middleware array as passed at construction.
-     * Used by {@link dev.relism.extension.FlashApp} and {@link dev.relism.extension.FlashScope}
-     * to populate {@link dev.relism.extension.RouteEvent#middlewareChain()}.
-     * Never mutated; never called on the hot-path.
-     */
-    public Middleware[] routerMiddlewares() { return rawRouterMiddlewares; }
-
-    // ── Internal wiring ───────────────────────────────────────────────────────
-
-    SimpleHandler    getNotFoundHandler()  { return notFoundHandler; }
-    ExceptionHandler getExceptionHandler() { return exceptionHandler; }
-
-    void setNamespace(String namespace) {
-        this.namespace = namespace;
-        this.namespaceBytes = namespace.getBytes(StandardCharsets.UTF_8);
-    }
-
-    /**
-     * Compiles a handler with its middleware chain. Called once per handler at registration.
-     *
-     * <p>Application order (innermost → outermost):
-     * <ol>
-     *   <li>handler-level middlewares (passed at the call site)</li>
-     *   <li>router-level middleware (set in the constructor)</li>
-     * </ol>
-     */
-    private RequestHandler compile(RequestHandler handler, Middleware[] handlerMiddlewares) {
-        RequestHandler compiled = handler;
-        for (int i = handlerMiddlewares.length - 1; i >= 0; i--)
-            compiled = new SimpleHandler(handlerMiddlewares[i].wrap(compiled));
-        if (routerMiddleware != null)
-            compiled = new SimpleHandler(routerMiddleware.wrap(compiled));
-        return compiled;
-    }
-
-    // ── Error handler configuration ───────────────────────────────────────────
-
-    public AbstractRouter onNotFound(SimpleHandler.FunctionalHandler handler) {
+    public void onNotFound(SimpleHandler.FunctionalHandler handler) {
         this.notFoundHandler = new SimpleHandler(handler);
-        return this;
     }
 
-    public AbstractRouter onException(ExceptionHandler handler) {
+    public void onException(ExceptionHandler handler) {
         this.exceptionHandler = handler;
-        return this;
     }
 
-    // ── Infrastructure registration ───────────────────────────────────────────
-    // Used by FlashApp and FlashScope. Not part of the public user-facing API.
+    // ── Infrastructure registration ──────────────────────────────────────────
+    // Used by FlashApp at compile time. Not part of the user-facing API.
 
     /**
-     * Registers a lambda handler immediately with a pre-built middleware array.
-     * Infrastructure method — use {@link dev.relism.extension.FlashApp} instead.
-     */
-    public AbstractRouter doRegister(HttpMethod method, String path,
-                                     SimpleHandler.FunctionalHandler handler, Middleware[] middlewares) {
-        return addRoute(method, PathUtils.sanitize(path),
-                compile(new SimpleHandler(handler), middlewares));
-    }
-
-    /**
-     * Registers a class-based handler immediately with a pre-built middleware array.
-     * Reads {@link Route @Route} for method and path.
-     * Infrastructure method — use {@link dev.relism.extension.FlashApp} instead.
-     */
-    public AbstractRouter doRegister(RequestHandler handler, Middleware[] middlewares) {
-        Route annotation = handler.getClass().getAnnotation(Route.class);
-        if (annotation != null)
-            addRoute(annotation.method(), annotation.path(),
-                    compile(handler, middlewares));
-        return this;
-    }
-
-    /**
-     * Registers a class-based handler with an explicit method and path (ignoring the
-     * {@link Route @Route} annotation's path). Used by {@link dev.relism.extension.FlashScope}
-     * to prepend the scope's namespace prefix.
-     * Infrastructure method — use {@link dev.relism.extension.FlashScope} instead.
+     * Registers a handler with a pre-built middleware array.
+     * Compiles the middleware chain once at boot — zero overhead on hot-path.
      */
     public AbstractRouter doRegister(HttpMethod method, String path,
                                      RequestHandler handler, Middleware[] middlewares) {
         return addRoute(method, PathUtils.sanitize(path), compile(handler, middlewares));
     }
 
-    // ── Routing ───────────────────────────────────────────────────────────────
+    /**
+     * Compiles handler-level middleware into a single wrapped handler.
+     * Called once per route at registration time.
+     */
+    private RequestHandler compile(RequestHandler handler, Middleware[] middlewares) {
+        RequestHandler compiled = handler;
+        for (int i = middlewares.length - 1; i >= 0; i--)
+            compiled = new SimpleHandler(middlewares[i].wrap(compiled));
+        return compiled;
+    }
+
+    // ── Routing ──────────────────────────────────────────────────────────────
 
     public abstract RequestHandler route(Request request);
 
-    /**
-     * Stores a pre-compiled handler in the underlying routing structure.
-     * The handler passed here is already fully wrapped — implementations must not
-     * apply any additional middleware logic.
-     */
     protected abstract AbstractRouter addRoute(HttpMethod method, String path, RequestHandler handler);
 
     protected static void setPathParams(Request request, String[] names, ByteView source, int[] starts, int[] lens) {
diff --git a/flash/src/main/java/dev/relism/routing/GlobalRouter.java b/flash/src/main/java/dev/relism/routing/GlobalRouter.java
deleted file mode 100644
index 9a009cd..0000000
--- a/flash/src/main/java/dev/relism/routing/GlobalRouter.java
+++ /dev/null
@@ -1,75 +0,0 @@
-package dev.relism.routing;
-
-import dev.relism.exceptions.DuplicateNamespaceException;
-import dev.relism.fpr.core.ByteView;
-import dev.relism.http.HttpMethod;
-import dev.relism.models.Request;
-import dev.relism.models.RequestHandler;
-import dev.relism.routing.routers.fastpathrouter.FastPathRouterImpl;
-
-import java.util.ArrayList;
-import java.util.Comparator;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-
-/**
- * Top-level dispatcher. Routes to the longest-matching mounted sub-router first,
- * falling back to the internal {@link FastPathRouterImpl}.
- */
-public class GlobalRouter extends AbstractRouter {
-    private final Map<String, AbstractRouter> subRoutersMap = new HashMap<>();
-    private final List<AbstractRouter> sortedSubRouters = new ArrayList<>();
-    private final AbstractRouter internalRouter;
-
-    public GlobalRouter(Middleware... middlewares) {
-        super(middlewares);
-        this.internalRouter = new FastPathRouterImpl();
-    }
-
-    public GlobalRouter() { this(new Middleware[0]); }
-
-    public void mount(String namespace, AbstractRouter router) {
-        String sanitized = PathUtils.sanitize(namespace);
-        if (subRoutersMap.containsKey(sanitized)) throw new DuplicateNamespaceException(sanitized);
-
-        router.setNamespace(sanitized);
-        subRoutersMap.put(sanitized, router);
-        sortedSubRouters.add(router);
-        sortedSubRouters.sort(Comparator.comparingInt((AbstractRouter r) -> r.getNamespaceBytes().length).reversed());
-    }
-
-    @Override
-    public RequestHandler route(Request request) {
-        ByteView path = request.getRequestLine().getPath();
-        for (AbstractRouter sub : sortedSubRouters) {
-            if (startsWith(path, sub.getNamespaceBytes())) {
-                RequestHandler h = sub.route(request);
-                return h != null ? h : sub.getNotFoundHandler();
-            }
-        }
-        RequestHandler h = internalRouter.route(request);
-        return h != null ? h : notFoundHandler;
-    }
-
-    public ExceptionHandler resolveExceptionHandler(Request request) {
-        ByteView path = request.getRequestLine().getPath();
-        for (AbstractRouter sub : sortedSubRouters) {
-            if (startsWith(path, sub.getNamespaceBytes())) return sub.getExceptionHandler();
-        }
-        return exceptionHandler;
-    }
-
-    @Override
-    protected AbstractRouter addRoute(HttpMethod method, String path, RequestHandler handler) {
-        return internalRouter.addRoute(method, PathUtils.sanitize(path), handler);
-    }
-
-    private static boolean startsWith(ByteView view, byte[] prefix) {
-        if (view.length() < prefix.length) return false;
-        for (int i = 0; i < prefix.length; i++) {
-            if (view.byteAt(i) != prefix[i]) return false;
-        }
-        return true;
-    }
-}
diff --git a/flash/src/main/java/dev/relism/routing/routers/fastpathrouter/FastPathRouterImpl.java b/flash/src/main/java/dev/relism/routing/routers/fastpathrouter/FastPathRouterImpl.java
index bb9464a..00910c7 100644
--- a/flash/src/main/java/dev/relism/routing/routers/fastpathrouter/FastPathRouterImpl.java
+++ b/flash/src/main/java/dev/relism/routing/routers/fastpathrouter/FastPathRouterImpl.java
@@ -9,8 +9,6 @@ import dev.relism.http.HttpMethod;
 import dev.relism.models.Request;
 import dev.relism.models.RequestHandler;
 import dev.relism.routing.AbstractRouter;
-import dev.relism.routing.Middleware;
-import dev.relism.routing.PathUtils;
 
 /**
  * Router backed by the {@code fpr-core} byte-level state machine. Routes are compiled lazily
@@ -23,8 +21,7 @@ public class FastPathRouterImpl extends AbstractRouter {
     private volatile FastPathRouter<ByteView, RequestHandler> router;
     private          String[]                                 cachedParamNames;
 
-    public FastPathRouterImpl(Middleware... middlewares) { super(middlewares); }
-    public FastPathRouterImpl()                          { super(); }
+    public FastPathRouterImpl() {}
 
     private static final class FastPathRouterContext {
         private static final ThreadLocal<MatchResult<RequestHandler>> RESULT_HOLDER =
@@ -43,8 +40,7 @@ public class FastPathRouterImpl extends AbstractRouter {
 
     @Override
     protected AbstractRouter addRoute(HttpMethod method, String path, RequestHandler handler) {
-        String fullPath = PathUtils.join(namespace, path);
-        builder.add(StringRouteParser.parse(method.name() + fullPath), handler);
+        builder.add(StringRouteParser.parse(method.name() + path), handler);
         this.router = null;
         return this;
     }
diff --git a/flash/src/test/java/dev/relism/routing/AbstractRouterTest.java b/flash/src/test/java/dev/relism/routing/AbstractRouterTest.java
index 0cdc8ec..b2de622 100644
--- a/flash/src/test/java/dev/relism/routing/AbstractRouterTest.java
+++ b/flash/src/test/java/dev/relism/routing/AbstractRouterTest.java
@@ -8,22 +8,17 @@ import dev.relism.models.Response;
 import dev.relism.models.SimpleHandler;
 import org.junit.jupiter.api.Test;
 
-import java.nio.charset.StandardCharsets;
-
 import static org.junit.jupiter.api.Assertions.*;
 
 class AbstractRouterTest {
 
-    // A minimal concrete router for testing base-class functionality
     static class DummyRouter extends AbstractRouter {
         RequestHandler lastAddedHandler;
         HttpMethod     lastAddedMethod;
         String         lastAddedPath;
 
         @Override
-        public RequestHandler route(Request request) {
-            return null;
-        }
+        public RequestHandler route(Request request) { return null; }
 
         @Override
         protected AbstractRouter addRoute(HttpMethod method, String path, RequestHandler handler) {
@@ -34,31 +29,15 @@ class AbstractRouterTest {
         }
     }
 
-    // --- namespace ---
-
     @Test
-    void setNamespace_updatesStringAndBytes() {
+    void doRegister_sanitizesPathAndWrapsHandler() {
         DummyRouter router = new DummyRouter();
-        assertEquals("/", router.getNamespace());
-
-        router.setNamespace("/api");
-        assertEquals("/api", router.getNamespace());
-        assertArrayEquals("/api".getBytes(StandardCharsets.UTF_8), router.getNamespaceBytes());
-    }
-
-    // --- doRegister (infrastructure method used by FlashApp/FlashScope) ---
-
-    @Test
-    void doRegister_lambda_sanitizesPathAndWrapsHandler() {
-        DummyRouter router = new DummyRouter();
-        SimpleHandler.FunctionalHandler func = (req, res) -> "OK";
-
-        router.doRegister(HttpMethod.GET, "users/", func, new Middleware[0]);
+        router.doRegister(HttpMethod.GET, "users/", new SimpleHandler((req, res) -> "OK"), new Middleware[0]);
         assertEquals(HttpMethod.GET, router.lastAddedMethod);
         assertEquals("/users", router.lastAddedPath);
         assertNotNull(router.lastAddedHandler);
 
-        router.doRegister(HttpMethod.DELETE, "//delete//", func, new Middleware[0]);
+        router.doRegister(HttpMethod.DELETE, "//delete//", new SimpleHandler((req, res) -> "OK"), new Middleware[0]);
         assertEquals(HttpMethod.DELETE, router.lastAddedMethod);
         assertEquals("/delete", router.lastAddedPath);
     }
@@ -69,17 +48,13 @@ class AbstractRouterTest {
         public Object handle(Request request, Response response) { return null; }
     }
 
-    static class UnannotatedHandler extends RequestHandler {
-        @Override
-        public Object handle(Request request, Response response) { return null; }
-    }
-
     @Test
-    void doRegister_annotatedHandler_addsRoute() {
+    void doRegister_classBasedHandler_addsRoute() {
         DummyRouter router = new DummyRouter();
         ProfileHandler handler = new ProfileHandler();
+        Route ann = ProfileHandler.class.getAnnotation(Route.class);
 
-        router.doRegister(handler, new Middleware[0]);
+        router.doRegister(ann.method(), ann.path(), handler, new Middleware[0]);
 
         assertEquals(HttpMethod.POST, router.lastAddedMethod);
         assertEquals("/profile", router.lastAddedPath);
@@ -87,27 +62,16 @@ class AbstractRouterTest {
     }
 
     @Test
-    void doRegister_unannotatedHandler_doesNothing() {
+    void defaultNotFoundHandler_returns404() throws Exception {
         DummyRouter router = new DummyRouter();
-        router.doRegister(new UnannotatedHandler(), new Middleware[0]);
-        assertNull(router.lastAddedMethod);
-    }
-
-    // --- error handlers ---
-
-    @Test
-    void defaultNotFoundHandler_returns404Html() throws Exception {
-        DummyRouter router = new DummyRouter();
-        Response res = new Response(200, new byte[0], ContentType.TEXT_PLAIN);
-
         assertNotNull(router.getNotFoundHandler());
 
         router.onNotFound((req, resp) -> "Custom 404");
-        assertEquals("Custom 404", router.getNotFoundHandler().handle(null, res));
+        assertEquals("Custom 404", router.getNotFoundHandler().handle(null, null));
     }
 
     @Test
-    void defaultExceptionHandler_canBeOverridden() throws Exception {
+    void defaultExceptionHandler_canBeOverridden() {
         DummyRouter router = new DummyRouter();
         assertNotNull(router.getExceptionHandler());
 
diff --git a/flash/src/test/java/dev/relism/routing/GlobalRouterTest.java b/flash/src/test/java/dev/relism/routing/GlobalRouterTest.java
deleted file mode 100644
index 8b1d242..0000000
--- a/flash/src/test/java/dev/relism/routing/GlobalRouterTest.java
+++ /dev/null
@@ -1,97 +0,0 @@
-package dev.relism.routing;
-
-import dev.relism.fpr.core.ByteView;
-import dev.relism.http.HttpMethod;
-import dev.relism.models.HeaderMap;
-import dev.relism.models.Request;
-import dev.relism.models.RequestHandler;
-import dev.relism.models.RequestLine;
-import dev.relism.models.SimpleHandler;
-import dev.relism.routing.routers.fastpathrouter.FastPathViews;
-import org.junit.jupiter.api.Test;
-
-import java.nio.charset.StandardCharsets;
-
-import static org.junit.jupiter.api.Assertions.*;
-
-class GlobalRouterTest {
-
-    // --- mock ---
-
-    static class MockSubRouter extends AbstractRouter {
-        RequestHandler matchedHandler;
-
-        MockSubRouter(RequestHandler handler) {
-            this.matchedHandler = handler;
-        }
-
-        @Override
-        public RequestHandler route(Request request) {
-            return matchedHandler;
-        }
-
-        @Override
-        protected AbstractRouter addRoute(HttpMethod method, String path, RequestHandler handler) {
-            return this;
-        }
-    }
-
-    private Request mockRequest(String path) {
-        byte[] bytes = path.getBytes(StandardCharsets.UTF_8);
-        FastPathViews.RequestByteView pathView = new FastPathViews.RequestByteView(bytes, 0, bytes.length);
-        RequestLine line = new RequestLine(
-                HttpMethod.GET, pathView, null,
-                new FastPathViews.RequestByteView("HTTP/1.1".getBytes(StandardCharsets.UTF_8), 0, 8),
-                new HeaderMap()
-        );
-        return new Request(line, new byte[0]);
-    }
-
-    // --- mount & route ---
-
-    @Test
-    void route_delegatesToSubRouterBasedOnLongestPrefix() {
-        GlobalRouter global = new GlobalRouter();
-
-        RequestHandler hApi   = new SimpleHandler((req, res) -> "api");
-        RequestHandler hApiV1 = new SimpleHandler((req, res) -> "apiv1");
-
-        global.mount("/api",    new MockSubRouter(hApi));
-        global.mount("/api/v1", new MockSubRouter(hApiV1));
-
-        assertEquals(hApiV1, global.route(mockRequest("/api/v1/users")));
-        assertEquals(hApi,   global.route(mockRequest("/api/v2/users")));
-    }
-
-    @Test
-    void route_fallsBackToInternalRouter() throws Exception {
-        GlobalRouter global = new GlobalRouter();
-        global.doRegister(HttpMethod.GET, "/hello", (req, res) -> "internal", new Middleware[0]);
-
-        RequestHandler resolved = global.route(mockRequest("/hello"));
-        assertNotNull(resolved);
-        assertEquals("internal", resolved.handle(null, null));
-    }
-
-    @Test
-    void route_noMatch_returnsNotFoundHandler() {
-        GlobalRouter global = new GlobalRouter();
-        RequestHandler resolved = global.route(mockRequest("/unknown"));
-        assertEquals(global.getNotFoundHandler(), resolved);
-    }
-
-    // --- resolveExceptionHandler ---
-
-    @Test
-    void resolveExceptionHandler_returnsScopedHandler() {
-        GlobalRouter global = new GlobalRouter();
-        MockSubRouter sub = new MockSubRouter(null);
-        AbstractRouter.ExceptionHandler customSubHandler = (ex, req, res) -> "sub error";
-        sub.onException(customSubHandler);
-
-        global.mount("/api", sub);
-
-        assertEquals(customSubHandler, global.resolveExceptionHandler(mockRequest("/api/fail")));
-        assertEquals(global.getExceptionHandler(), global.resolveExceptionHandler(mockRequest("/other")));
-    }
-}
diff --git a/flash/src/test/java/dev/relism/routing/routers/fastpathrouter/FastPathRouterImplTest.java b/flash/src/test/java/dev/relism/routing/routers/fastpathrouter/FastPathRouterImplTest.java
index ce35707..dafb126 100644
--- a/flash/src/test/java/dev/relism/routing/routers/fastpathrouter/FastPathRouterImplTest.java
+++ b/flash/src/test/java/dev/relism/routing/routers/fastpathrouter/FastPathRouterImplTest.java
@@ -5,6 +5,7 @@ import dev.relism.models.HeaderMap;
 import dev.relism.models.Request;
 import dev.relism.models.RequestHandler;
 import dev.relism.models.RequestLine;
+import dev.relism.models.SimpleHandler;
 import dev.relism.routing.Middleware;
 import org.junit.jupiter.api.Test;
 
@@ -14,9 +15,7 @@ import static org.junit.jupiter.api.Assertions.*;
 
 class FastPathRouterImplTest {
 
-    private static final Middleware[] NO_MIDDLEWARE = new Middleware[0];
-
-    // --- helpers ---
+    private static final Middleware[] NO_MW = new Middleware[0];
 
     private Request mockRequest(HttpMethod method, String path) {
         byte[] bytes = path.getBytes(StandardCharsets.UTF_8);
@@ -29,14 +28,11 @@ class FastPathRouterImplTest {
         return new Request(line, new byte[0]);
     }
 
-    // --- route ---
-
     @Test
     void route_lazyCompilationAndMatch() throws Exception {
         FastPathRouterImpl router = new FastPathRouterImpl();
-
-        router.doRegister(HttpMethod.GET,  "/a", (req, res) -> "A", NO_MIDDLEWARE);
-        router.doRegister(HttpMethod.POST, "/b", (req, res) -> "B", NO_MIDDLEWARE);
+        router.doRegister(HttpMethod.GET,  "/a", new SimpleHandler((req, res) -> "A"), NO_MW);
+        router.doRegister(HttpMethod.POST, "/b", new SimpleHandler((req, res) -> "B"), NO_MW);
 
         RequestHandler res1 = router.route(mockRequest(HttpMethod.GET, "/a"));
         assertNotNull(res1);
@@ -50,7 +46,7 @@ class FastPathRouterImplTest {
     @Test
     void route_noMatch_returnsNull() {
         FastPathRouterImpl router = new FastPathRouterImpl();
-        router.doRegister(HttpMethod.GET, "/a", (req, res) -> "A", NO_MIDDLEWARE);
+        router.doRegister(HttpMethod.GET, "/a", new SimpleHandler((req, res) -> "A"), NO_MW);
 
         assertNull(router.route(mockRequest(HttpMethod.GET, "/b")));
         assertNull(router.route(mockRequest(HttpMethod.POST, "/a")));
@@ -60,7 +56,7 @@ class FastPathRouterImplTest {
     void route_extractsPathParams() throws Exception {
         FastPathRouterImpl router = new FastPathRouterImpl();
         router.doRegister(HttpMethod.GET, "/users/{id}/items/{itemId}",
-                (req, res) -> "Extract", NO_MIDDLEWARE);
+                new SimpleHandler((req, res) -> "Extract"), NO_MW);
 
         Request request = mockRequest(HttpMethod.GET, "/users/123/items/456");
         RequestHandler handler = router.route(request);
diff --git a/pom.xml b/pom.xml
index 18591ea..206d0a4 100644
--- a/pom.xml
+++ b/pom.xml
@@ -58,6 +58,16 @@
                 <artifactId>flash-ext-routeviewer</artifactId>
                 <version>${project.version}</version>
             </dependency>
+            <dependency>
+                <groupId>dev.relism</groupId>
+                <artifactId>flash-ext-view</artifactId>
+                <version>${project.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>dev.relism</groupId>
+                <artifactId>flash-ext-limiter</artifactId>
+                <version>${project.version}</version>
+            </dependency>
             <dependency>
                 <groupId>dev.relism</groupId>
                 <artifactId>fpr-core</artifactId>