workflow-fix: dropped-at-gate condition placement check (Takeaways + result) in verify_task_body

Overview / Motivation

Auto-filed by the workflow-fix-on-bug protocol from a mechanizable: yes clean-result-critic Lens 13 finding on task #1947 (emitting agent: clean-result-critic, round 1).

Goal

Add a verify_task_body check requiring a Methodology-declared dropped-at-gate condition to be named in Takeaways and a result section.

Workflow gap

• Bug observed: the #1947 body declared the sycophancy yield-gate drop only in Methodology Design: and passed all 65 checks; clean-result-critic Lens 13 caught the missing Takeaways/result placement manually.
• Why it is a workflow gap: CLAUDE.md After-Every-Experiment item 8(a) mandates the missing condition be named in ## Takeaways AND the relevant ### <result> prose, but scripts/verify_task_body.py has no check enforcing the placement — check 11b covers denominator consistency, not the naming placement.
• Confidence (emitter): high (mechanizable: yes tagged in the critique marker)
• verified-at-filing: grep -cE 'dropped at|yield.gate' scripts/verify_task_body.py → 0 hits (2026-08-02); absence-of-check claim, 0-hit in-target is the evidence (structural check absence, not a text-matching-guard subclass); git log --oneline --since='7 days ago' -- scripts/verify_task_body.py shows 3 recent commits, none adding dropped-condition placement handling.

Proposed change (candidate diff sketch — refine in planning)

+ # Check N: a Methodology section declaring a condition "dropped at <gate>"
+ # (yield gate / data gate / kill criterion) requires the dropped condition's
+ # name to appear in ## Takeaways AND in at least one ### result's prose
+ # (After-Every-Experiment 8(a)); FAIL names the declaration line + the
+ # missing placement(s). v4 bodies only; grandfathered shapes exempt.

Scope / surfaces

• Primary target: scripts/verify_task_body.py
• Companion: tests/test_verify_task_body.py (fixture pair: declaring body with/without the placements); SPEC.md mechanical-checks list if it enumerates checks.

Constraints / invariants

• Workflow-surface only. scripts/workflow_lint.py --check-asks passes; ruff clean; forward-only (never newly hard-FAIL v3/v2/legacy bodies).
• This session runs under a workflow_fix_target: Provenance line — recursion guard applies to the spawned session.

Provenance

• workflow_fix_target: scripts/verify_task_body.py
• fingerprint: 085eef8e26cb

Surfaced prose (clean-result-critic round-1 verdict, task #1947, 2026-08-02T08:54:40Z): "fix 1's check (Methodology 'dropped at … gate' ⇒ dropped-condition name required in Takeaways/a result) … candidate verifier extensions for the orchestrator to route per the workflow-fix protocol."