Flags GitHub Actions lines that stop working on a date - retired runner images, shut-down action versions, Node runtimes past end-of-life. Checked against any 'as of' date. Runs entirely in your browser — nothing is uploaded.
Free here: Check the workflow file open in your editor against all 13 dated checks. In the editor: Sweep every workflow in the repo and write a dated actions-expiry-report.md you keep — that part asks for a licence key.
Same engine as the VS Code extension, byte for byte.