P2: Failures-log structural read-enforcement in /dev

[ramdhanyk]

Source: 2026-04-20 multi-expert AADM audit. Skeptical-PM auditor.

Problem

CLAUDE.md says check docs/failures/ during ambiguity passes. Nothing verifies Claude actually did. START-HERE.md itself predicts the failures log decays into a graveyard within two sprints.

Fix

• Update tooling/.claude/skills/dev.md — add step 0: list docs/failures/ filenames touching the task's domain (grep filenames for keywords from the task title), output the list in the response.
• Update tooling/scripts/reconcile.py --strict to reject PRs whose /dev session log lacks a failures-checked: [filenames] line.

Acceptance

A /dev session that skipped the failures check fails CI, with the missing filenames listed in the failure message.