Verifier Evidence Reference Fidelity

Background

ISS-007 came from end-to-end diagnosis cases where raw tool output and Executor evidence_excerpt contained enough facts, but Verifier still returned LOW_CONFID because the verifier-facing summary compressed away key details.

The affected flow is:

chat_planner
  -> chat_executor
  -> VerifierInputHook / Gatekeeper
  -> chat_verifier
  -> chat_composer

The change hardens the evidence handoff between Executor, Gatekeeper, and Verifier.

Goal

Make Executor cite concrete tool evidence, make Gatekeeper validate that citation with code, and make Verifier judge whether verified evidence can derive the claim.

Scope

Persist tool_invocation.retrieval_details.evidence_refs.
Use source_invocation_id + raw_path + evidence_excerpt as the precise evidence binding.
Add Gatekeeper severity and checked binding audit.
Keep Gatekeeper in the Verifier hook path.
Keep tool_trace_summary as navigation/audit context, not the only evidence source.
Fix HikariCP mock positive/no-hit behavior.
Tighten Executor/Verifier prompts for narrow-scope evidence handling.

Non-goals

No Planner scope_contract.
No new database table.
No full JSONPath engine.
No change to external HTTP API.
No retry rollback from Gatekeeper to Executor in this phase.

OpenSpec

Change: openspec/changes/verifier-evidence-reference-fidelity
Source issue: mvp/issues/archived/ISS-007-verifier-evidence-summary-fidelity.md

1.5 KiB Raw Blame History