workflow-fix: verify_plan edited-literal pin-test check

Overview / Motivation

Auto-filed by the /daily 2026-08-02 Step C parked-candidate routing pass from a workflow-fix candidate parked on task #1948 (emitting agent: the #1948 round-1 Claude critic, Methodology lens, via the orchestrator's recursion-guard park; epm:workflow-fix-candidate at 2026-08-03T00:39:29Z).

Goal

Add a verify_plan.py check: when a plan declares an edit to a SKILL.md / workflow-surface literal, every tests/ file pinning that literal must appear in the plan's edit-target list (WARN/FAIL per unlisted pin-test hit).

Workflow gap

• Bug observed: plan v2 for #1948 edited a SKILL.md probe-pattern literal without listing the pin test (tests/test_issue_skill_gate_single_flight.py:106) that asserts that exact literal — acceptance criterion "Step 9c compare exit 0" was deterministically unsatisfiable as scoped; caught only by the Claude critic.
• Why it is a workflow gap: no mechanical check requires that when a plan declares an edit to a SKILL.md/workflow-surface literal, every tests/ file pinning that literal appears in the plan's edit-target list.
• Confidence (emitter): low
• verified-at-filing: grep -n -iE 'pin.test|edited.literal|literal.*tests/|check_edited' scripts/verify_plan.py → 24 hits in 1 file, all in the DURABILITY-PIN arm (a plan must DECLARE a Durability pin: for new prose and the pin must ship in the diff — verify_plan.py:5246–5443, #1679 arm at :6405) — none implements the inverse direction this candidate proposes (detect EXISTING tests/ pins on a plan-EDITED literal and require them in the edit-target list), so the gap claim binds; plus git log --oneline --since='7 days ago' -- scripts/verify_plan.py → 7 commits, none touching edited-literal pin-test detection (2026-08-02). The incident's pin test exists: tests/test_issue_skill_gate_single_flight.py:106 asserts the exact step9c probe literal (read at compose time).

Proposed change (candidate diff sketch — refine in planning)

+ def check_edited_literal_pin_tests(plan_text, ...):
+     for lit in plan-declared edited literals (fenced old->new pairs on workflow-surface files):
+         hits = grep -rln <lit> tests/
+         WARN/FAIL per hit file not named in the plan's File-paths section

Scope / surfaces

• Primary target: scripts/verify_plan.py
• Related but distinct open sibling on the same file: #1960 (lattice parser negated-existence atom, fp 63fb274bb974, status reviewing) — different bug, different fingerprint; not a duplicate.
• Grep the workflow surface for the pattern before editing and update every hit; list them in the plan.

Constraints / invariants

• Workflow-surface only — never experiment code, configs/, or tasks/.
• scripts/workflow_lint.py --check-asks passes; ruff on touched files passes.
• This session runs under EPM_WORKFLOW_FIX_SESSION=1 and carries a workflow_fix_target: Provenance line — it MUST NOT auto-route any of its own subagents' workflow-fix candidates (recursion guard).

Provenance

• workflow_fix_target: scripts/verify_plan.py
• fingerprint: 2732a7f36293

Origin candidate (verbatim, parked on #1948 at 2026-08-03T00:39:29Z):

target_file: scripts/verify_plan.py bug_observed: plan v2 for #1948 edited a SKILL.md probe-pattern literal without listing the pin test (tests/test_issue_skill_gate_single_flight.py:106) that asserts that exact literal — acceptance criterion "Step 9c compare exit 0" was deterministically unsatisfiable as scoped; caught only by the Claude critic. why_workflow_gap: no mechanical check requires that when a plan declares an edit to a SKILL.md/workflow-surface literal, every tests/ file pinning that literal appears in the plan's edit-target list. proposed_change: add a verify_plan.py check — for each plan-declared edited literal/pattern on a workflow-surface file, grep tests/ for the literal and FAIL/WARN if a hit file is absent from the plan's target list. confidence: low related_task: #1948