lynicis/actup

GitHub Actions Updater

Keep .github/workflows/*.yml and .github/workflows/*.yaml files current by scanning actions, resolving latest versions, and suggesting upgrades.

Quick start

When the user asks something like:

"Update my GitHub Actions" "Which actions are out of date?" "Bump actions in my workflows"

Follow the workflow below and return a Markdown report with diff-style suggestions.

Workflow

1. Scan workflows

   • Find all .github/workflows/*.yml and .github/workflows/*.yaml files.
   • If none exist, tell the user and stop.

2. Extract uses: refs

   • Parse each workflow for uses: lines.
   • Skip:
     • Local paths: ./...
     • Docker refs: docker://...
     • Full SHA commits: anything that looks like a 40-char hex SHA
   • Record: action, current_version, workflow_file, line_number.

3. Resolve latest version

   • Split each action into owner/repo.
   • Try tools in this order:
     1. gh api repos/{owner}/{repo}/tags --jq '.[].name' if gh is available.
     2. fetch on https://api.github.com/repos/{owner}/{repo}/tags.
     3. Brave Search / Google Search MCP for "{owner}/{repo} latest release tag".
   • Filter tags to valid semver.
   • Prefer major tags (v5) over full semver (v5.3.1) by default.
   • If no major tag exists, fall back to the highest semver tag.

4. Detect breaking changes

   • If the latest version is a higher major than the current version, mark it as a breaking change.
   • Cross-check the embedded registry below for known warnings.

5. Generate suggestion report

   • Produce a Markdown report with:
     • Summary table: action | current | latest | breaking? | file
     • Diff blocks per action
     • Breaking-change warnings with ⚠
   • Do not edit workflow files unless the user explicitly asks.

Breaking-change registry

- action: actions/checkout
  from_major: 3
  to_major: 4
  warning: "Node runtime upgraded from 16 to 20. Check custom runners and self-hosted setup."
- action: actions/setup-node
  from_major: 3
  to_major: 4
  warning: "Node 16 runtime deprecated; Node 20 is now used."
- action: actions/setup-go
  from_major: 4
  to_major: 5
  warning: "Node 20 runtime. Verify any custom cache keys or side effects."

Output template

## GitHub Actions update report

| Action | Current | Latest | Breaking? | File |
|--------|---------|--------|-----------|------|
| actions/checkout | v3 | v4 | ⚠ yes | .github/workflows/ci.yml |

### Suggested changes

`.github/workflows/ci.yml`:
```diff
- uses: actions/checkout@v3
+ uses: actions/checkout@v4

Breaking-change warnings

• actions/checkout@v3 → v4: Node runtime upgraded from 16 to 20. Check custom runners and self-hosted setup.

## Rules

- Never silently write workflow files.
- Always show a diff-style preview before any edit.
- If GitHub API rate limits are hit, fall back to search MCPs or manual guidance.
- If an action has no semver tags, note it as "unable to determine latest version".