Connect processing to shared PromptKit backend capacity

docs/roadmap/implementation.md

@@ -382,7 +382,20 @@ full runner behavior is Stage 8.
 
 ## Stage 8: Connect the Runner and Remove the Old Scheduling Hierarchy
 
-**Status:** Pending. **Depends on:** Stages 2 and 4–7.
+**Status:** Complete (2026-09-24). CLI processing now supplies both role clients
+from one PromptKit engine; removed global/role schedulers, scheduler contracts,
+the old utilization instrumentation, and retired concurrency settings. Runner
+ordering, cancellation, partial failure handling, and domain checks remain.
+Updated architecture and runtime guidance. `go build -o /tmp/audita-stage8-build
+./cmd/audita` passed; focused diagnostics, module, proposal, validator, runner,
+and LLM suites passed; `go test -race ./internal/framework/llm` passed. Local
+HTTP tests covered shared backend capacity, independent backend identities,
+zero-wait rejection, queued deadline cancellation, and later capacity reuse.
+A real CLI-to-local-HTTP run completed with one proposal and two validation
+calls and wrote the corrected transcript. The legacy CLI test file still uses
+retired configuration and report contracts; assembled CLI tests remain for
+Stages 10–12. `git diff --check` passed.
+**Depends on:** Stages 2 and 4–7.
 **Owns:** CLI process assembly, `internal/framework/runner`, old scheduler contracts,
 and runner/CLI integration tests.