Preserve proposal outcomes and classify filtered proposals

docs/roadmap/implementation.md

@@ -463,6 +463,16 @@ without examining error strings; counts are available independently of debug.
 
 ## Stage 3 — Convert Proposal Failures and Classify Safe Filtering
 
+**Completed 2026-09-24.** Proposal generation and the shared path used by all
+four built-in modules now preserve one identified operation with terminal counts
+on success, recoverable failure, and fatal return. Recoverable failures yield no
+candidates; a valid empty response succeeds. A focused domain classifier separates
+defective proposals from editorial rejection without changing deterministic
+validator policy. Updated proposal, wrapper, and filtering tests are present.
+`git diff --check` passed. Those tests and the existing four-module routing tests
+cannot compile until the validator warning consumers are converted in Stage 4;
+the attempted `go test` reports those exact stale-field errors.
+
 **Work:** Update `proposal_generation.GenerateCandidates` and all four module
 wrappers to preserve operation outcomes. A recoverable proposal call returns zero
 candidates plus a failed operation, not a warning or fatal Go error. A valid empty