feat(agent): add executor evidence v2 contract

2026-07-08 01:37:15 +08:00
parent a6afbfaa9d
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21 changed files with 2707 additions and 20 deletions
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+# Brief: executor-v2-output-contract
+
+## Background
+
+`executor_evidence_v1` still made Chat Executor produce both evidence attribution and final user-facing prose through `diagnosis_summary` and `user_facing_answer`.
+
+This kept Executor in a "diagnose and narrate" role and left room for unsupported conclusions to appear before later verification and composition stages.
+
+## Goal
+
+Narrow Chat Executor output to `executor_evidence_v2`: structured diagnostic material only, with final expression removed from Executor.
+
+## Scope
+
+- Update Chat Executor prompt to emit `executor_evidence_v2`.
+- Remove `diagnosis_summary` and `user_facing_answer` from Executor output.
+- Keep `claims`, `hypotheses`, `recommended_actions`, `missing_info`, and evidence bindings.
+- Add temporary ChatService rendering for PASS + V2 output so normal users do not see raw JSON.
+- Preserve V1 `user_facing_answer` extraction for compatibility.
+
+## Non-Goals
+
+- No Gatekeeper implementation.
+- No Verifier V2 `claim_checks`.
+- No Composer.
+- No Planner changes.
+- No database schema changes.
+- No evidence tool signature changes.
+
+## Related OpenSpec
+
+`openspec/changes/archive/2026-07-07-executor-v2-output-contract/`