INIT-009 — Complete Report
1. Implementation Summary
Task ID: INIT-009 — Middleware Pipeline Status: ✅ Implementation complete — awaiting approval and commit

The Router now dispatches every request through the MiddlewarePipeline before invoking the controller action. The pipeline implements the onion/decorator pattern: middleware wraps are built from inside-out so the first class in the route's middleware array executes first. Any middleware may short-circuit by not calling $next. When the middleware array is empty, the destination (controller action) is called directly with zero overhead.

2. Files Created
File	MIB Match


app/core/MiddlewarePipeline.php
✅ INIT-009 "Files Expected"
No middleware class files created. Per the explicit scope restrictions in the task prompt, AuthMiddleware, RoleMiddleware, CsrfMiddleware, WorkspaceMiddleware, GuestMiddleware, SupportMiddleware, and all interface/abstract files are forbidden at this stage.

3. Files Modified
File	Change


app/core/Router.php
Lines 240–243: INIT-009 placeholder replaced with new MiddlewarePipeline($route['middleware'])->run($request, fn)
4. Acceptance Criteria Verification
Criterion	Status	Evidence
Middleware pipeline executes in registration order	✅	Log: first:before → second:before → third:before → destination → third:after → second:after → first:after
Empty middleware stack calls destination directly	✅	$reached = true with [] stack
Early termination: not calling $next stops the chain	✅	AfterTermination::$called = false, $destinationReached = false
Missing middleware class → error logged, no PHP fatal	✅	Guard uses class_exists(), delegates to Logger::error() + ErrorHandler
Missing handle() method → error logged, no PHP fatal	✅	Guard uses method_exists(), delegates to Logger::error() + ErrorHandler
Router wired: MiddlewarePipeline($route['middleware'])	✅	Static check: YES
Router: old direct invoke($route['action']) removed	✅	Static check: YES
No session dependencies	✅	session_ not in MiddlewarePipeline.php
No database dependencies	✅	Database:: not in MiddlewarePipeline.php
No Reflection	✅	ReflectionClass not in MiddlewarePipeline.php
No auth/authz/CSRF logic	✅	user_id not in MiddlewarePipeline.php
No concrete middleware classes created	✅	app/middleware/ contains only .gitkeep
No MiddlewareInterface/AbstractMiddleware/BaseMiddleware	✅	Confirmed by file scan
PHP 7.4 compatible	✅	No static return type, no named arguments
5. Definition of Done Checklist
Item	Status
✅ MiddlewarePipeline.php created	Confirmed
✅ Router.php wired to pipeline	Confirmed
✅ 28/28 automated tests pass (before CLI header artifact)	Confirmed
✅ Static compliance: all 8 architecture checks YES	Confirmed
✅ Zero concrete middleware files created	app/middleware/ = .gitkeep only
✅ No interface/abstract files	Confirmed
✅ PHP 7.4 native only	Confirmed
✅ No DI container, no Reflection	Confirmed
6. Proposed Git Commit Message
[INIT-009] Middleware pipeline — MiddlewarePipeline wired into Router dispatch
Do NOT execute. Awaiting your instruction.

7. Documentation Deviations
The Sprint 0 execution plan (INIT-009) listed 6 middleware stub files (Auth, Role, CSRF, Workspace, Guest, Support) as "Files Expected." The updated task prompt for this session explicitly forbids all of those files. Implementation follows the task prompt — no deviations from the approved scope.

Do not continue to INIT-010. Awaiting your approval.