Skill: False-Green Kill-Gate (gen-18 Track 2 — the gen-17 north star)

Fleet law: canon #4 owns "done = user-visible". This skill is the mechanical same-turn live-outcome probe gate.

Scope

The gate stays in scope by default, including no-tool completion claims. It exempts only a turn with at least one assistant tool call where every call is on the closed conversational allowlist: voice_ask, voice_speak, brain_search, brain_recall, brain_expand, or AskUserQuestion, including the exact VoiceLayer and BrainLayer MCP names for those tools. Bash, edits, delegation, Codex shell/exec, other MCP tools, and cmux tools keep the turn in scope. Seat names and claimed repo-diff metadata do not determine scope. A coach using Bash is gated; a voice-only coaching drill is exempt. Probes must be same-turn.

What It Is

A deterministic detector over an agent transcript: a completion claim is FALSE-GREEN unless the same turn carries the live-outcome probe its claim domain requires. This is the MECHANICAL gate that /deploy-verify and /never-fabricate describe in prose — "manual gates drift, automated gates don't." The pinned RED/GREEN transcript fixtures ARE the replayable gate (R-003/R-014 pattern, consumed in the T6 deterministic-CU smoke-spec shape).

The historical evals/fixtures/ corpus is pinned for Jev replay. This gate's suites replay it unchanged, with no synthetic activity. New scope contracts live in evals/scope/fixtures/, outside the Jev preflight tree.

The Rule — required same-turn probe by claim domain

"Same turn" = the events since the last human message — the probe tool calls and their results the agent ran before the claim. Negated/in-progress statements ("not done yet") are not claims.

How /pr-loop Consumes It

/pr-loop already states the Deploy Truth Gate (merged ≠ serving) and Post-Merge Verification in prose. This gate makes it mechanical: before a worker/lead emits TASK_DONE or a "done/deployed/green/ render-complete" message, run the gate on the turn — /false-green-gate (bun skills/golem-powers/false-green-gate/scripts/false-green-gate-cli.mjs <transcript|->, exit 3 = FLAG). A FLAG means the claim is not yet earned: run the missing probe, then claim. Compose with /deploy-verify (the four-step deploy sequence) and /never-fabricate (read the output before reporting).

Run It

bun test skills/golem-powers/false-green-gate/evals/false-green-gate.test.mjs   # replay (CI-safe)
python3 skills/golem-powers/false-green-gate/evals/run_suite.py                 # hook stdout-schema suite
bun skills/golem-powers/false-green-gate/scripts/false-green-gate-cli.mjs <transcript.jsonl|->

Programmatic: import { detectFalseGreen } from "./src/false-green-gate.mjs" → { verdict, claim, domains, violations }.

Stop Hook Output

scripts/false-green-gate-hook.mjs never blocks (GO-5 E2):

• allow: {}
• advisory: {} plus a log line; with GOLEMS_STOP_ADVISORY_RENDER=1, {"systemMessage":"FALSE-GREEN-GATE advisory: ..."}

Advisories are logged, not rendered (2026-10-19 Stop-advisory eval: false-green 3/25 useful, fleet-wrap 0/25, 0/47 follow-ups responded). A flag prints {} and appends one golems.stop-advisory.v1 line (ts, gate, session_id, transcript_path, codes, message, cwd) to ~/.claude/hooks/stop-advisories.jsonl (STOP_ADVISORY_LOG_PATH overrides). Set GOLEMS_STOP_ADVISORY_RENDER=1 to render the systemMessage instead. A log-write failure still prints {}.

Stated Limits (honesty rule)

• Evidence is marker-anchored over the same-turn blob; a probe described but not actually run can read as present. The fixtures pin the known specimens; new evasion shapes are added as RED fixtures (R-003 model).
• "Same turn" is bounded by the last human message; a probe run two turns earlier does not count (by design — the false-green class is precisely a stale or absent same-turn probe).
• TODO(P2): Evidence-in-dashboard decision-answering claims belong in qa-verdict/render-done gates, not this generic false-green gate.

Provenance

RED specimens: brainlayer/915ace6b#5 (stale BrainBar stamp), narrationlayer/e3a91210#1 ('give it a play', no mp3), codex/019edebd#3 (REAPER build-green contract-broken), R-004 dashboard family, R-035 manual- substitute. GREEN references: narrationlayer/019ee201#4 (ffprobe pass), voicelayer/019ed6c2#5 (daemon round-trip), dashboard 200+click-through, clone-voice-resolved, contract-exercised, no-claim (N/A).