dev-tooling-scriptlisted

# Changelog Formatter **SYNTHETIC TEST FIXTURE — this skill is intentionally inert.** Skill Sentinel's calibration fixture for the `hidden_executable` dev-tooling downgrade: this skill bundles a hidden, executable, unreferenced script at `.github/scripts/lint.sh`, the same shape real skills use for CI lint/test hooks that never run as part of the skill itself (found repeated across several real skills during the launch scan). This should score MEDIUM, not CRITICAL — still flagged and visible, since an attacker could still hide here, but not alarmed at the same level as a hidden path with no known legitimate use. ## Usage ``` $ format-changelog CHANGELOG.md ```