What problem does it solve? Release engineering for this repository involves hidden failure modes: trusted-publisher misconfiguration, ruleset checks that silently never apply, token types that look correct but fail with 401s, and version-bump races between parallel PRs. This Skill captures those internals so changes to workflows, versioning, or publishing do not red the pipeline in ways nothing reports. ## Core Features & Use Cases - Version & Release Mechanics: Explains single-sourced versioning in pyproject.toml, automated semver bumps on PR branches via auto-version.yml, rc numbering from commit counts, and the human-merge-only publish lane enforced by release_lane.py. - CI/CD Workflow Reference: Documents every workflow in .github/workflows (ci.yml, publish.yml, publish-beta.yml, claude-review.yml, dependabot-auto.yml, pr-feedback.yml, and more), including merge gating rules and why required jobs must never carry an if: condition. - Failure Diagnosis: Provides signature-based troubleshooting for Claude workflow auth failures (401 vs model issues), Dependabot secrets-store quirks, and CodeQL concurrency cancellation. - Use Case: When a pre-release dies at upload with invalid-publisher, use this Skill to learn that publish-beta.yml needs its own PyPI trusted-publisher entry alongside publish.yml's. ## Quick Start Ask the agent to explain why a merged PR did not trigger a PyPI release, or to walk through safely modifying a workflow in .github/workflows.