Classify model failures and capture execution counts

docs/roadmap/implementation.md

@@ -436,6 +436,15 @@ partial validation, and recovery detail without any filesystem/report dependency
 
 ## Stage 2 — Classify Model Failures and Return Execution Facts
 
+**Completed 2026-09-24.** The PromptKit adapter now classifies parent
+cancellation, setup defects, local deadlines, capacity, transport, provider
+envelopes/statuses, exhausted invalid output, and domain decode overflow with
+typed safe failures. It returns terminal attempt/retry/repair/status counts on
+successful and failed calls, while preserving observation hooks and typed causes.
+`go test ./internal/framework/llm -count=1`, its race suite, and
+`git diff --check` passed. Whole-repository compilation remains deferred while
+the warning consumers are reconnected in later stages.
+
 **Work:** Implement C in `llm/adapter.go` using the pinned library's public types.
 Capture terminal counts locally for each call and return them even on failure;
 forward existing observation hooks without deriving recovery classifications in