feature_pitch: headline: "Brain consistency measurement instrument + self-healing loop." one_liner: "gbrain eval suspected-contradictions samples retrieval pairs and flags conflicts, with doctor + MCP + dream-cycle integration."

v0.32.6 Migration: Contradiction Probe

The agent ran this version migration when the user upgraded gbrain. After upgrade, this file is read by the auto-update agent which performs the following steps automatically.

Mechanical (handled by `gbrain apply-migrations`)

Two new tables get added on first connect after upgrade:

eval_contradictions_cache — persistent judge verdict cache, keyed on (chunk_a_hash, chunk_b_hash, model_id, prompt_version, truncation_policy). TTL-driven (default 30 days). Bounded by sweepContradictionCache.
eval_contradictions_runs — one row per gbrain eval suspected-contradictions run. Source for the trend sub-subcommand and the doctor contradictions check.

Both are RLS-enabled on Postgres (matches existing eval table posture). On PGLite they're plain tables.

Operator action (optional)

The probe is opt-in — it doesn't run automatically. To use it:

# Run against one query:
gbrain eval suspected-contradictions --query "what is acme's MRR" --top-k 5 --json

# Run against a queries file:
gbrain eval suspected-contradictions --queries-file ~/.gbrain/queries.jsonl --top-k 5

# Inspect findings without re-running:
gbrain eval suspected-contradictions review --severity high

# Trend over time:
gbrain eval suspected-contradictions trend --days 30

Doctor integration

After the first probe run, gbrain doctor shows a contradictions check with severity breakdown + paste-ready resolution commands per HIGH-severity finding.

MCP integration

The agent can call find_contradictions(slug?, severity?, limit?) during conversations to surface findings proactively. Reads from the latest probe run; does NOT trigger a new probe.

Dream cycle integration

The synthesize phase reads the latest probe's top-5 highest-severity findings and injects them as an informational block into the synthesis prompt. The subagent sees what to reconcile when writing compiled_truth to flagged slugs. Empty trend = empty block; fresh-install behavior unchanged.

Verification

gbrain doctor --json | jq '.checks[] | select(.name == "contradictions")'

Should print an entry with status "ok" (no probe runs yet) or "warn" (high-severity findings present). If the entry is missing, the migration didn't apply — run gbrain apply-migrations --yes and re-check.

v0.32.6