Action Runtime Sunset Lint

Runs the same checker as the npm package @readystack/action-runtime-sunset-lint on a Node.js runtime that pip installs for you (nodejs-wheel-binaries) - no system Node.js needed. Your files are checked locally.

Finds the GitHub Actions steps that stop running on 2026-09-23, with the version to move to

Install

action-runtime-sunset-lint file

Node 18+. The same 23 rules as the VS Code extension, from a terminal or CI.

Free

• Lints the one workflow YAML file you have open against all 23 rules and names the replacement version for every finding. On the sample release workflow _fixtures/dirty.yml that is 6 findings: 5 steps already dead on GitHub-hosted runners and 1 ageing toolchain pin. The migrated file _fixtures/clean.yml reports 0.
• --rules lists every rule

With a licence ($29 once)

• Sweeps every workflow and composite action.yml in the workspace in one pass and writes a dated migration checklist into the repository that you keep. $29 once, one licence key per person or CI seat.

@readystack/action-runtime-sunset-lint --dir ./templates --report html --out report.html

A DevOps contractor doing the same audit and migration by hand bills $30 to $150 an hour on the open freelance market.

Use from an AI agent (MCP)

Claude Code · Cursor · Windsurf · any MCP client - add to your MCP config:

{ "mcpServers": { "action-runtime-sunset-lint": { "command": "npx", "args": ["-y", "@readystack/action-runtime-sunset-lint", "--mcp"] } } }

Tools: check_text and check_file (free) · check_dir (licence). The agent gets every finding with the line number.

Use in CI

- name: Action Runtime Sunset Lint
  run: npx -y @readystack/action-runtime-sunset-lint --dir . --ci

(container: docker run --rm -v "$PWD:/work" getreadystack/action-runtime-sunset-lint --dir /work --ci)

The folder sweep, reports and CI mode need one licence — one payment, no subscription. Set READYSTACK_LICENSE=<key> or run --license <key> once.

Get a licence

Install (PyPI)

pip install readystack-action-runtime-sunset-lint
action-runtime-sunset-lint --help