This GitHub action puts the "stale" label to PRs that has been inactive for at least n days. If the PR already has that label, it gets replaced with the "to close" label.

• context: the workflow context, just put ${{ toJSON(github) }} (required);
• token: the GitHub token, just put ${{ secrets.GITHUB_TOKEN }} (required);
• stale-timeout: the number of days that a PR can be inactive before it gets the "stale" label (default: 14);

• message: the message that will be displayed in the action log.

To test the action locally, create a .env file with

cp .env.example .env

and fill the GITHUB_TOKEN variable with a valid GitHub token (create one here).

Then run

node src/action.test.js

and you'll see the logs in the console. To see if the action is right, you should double check the PRs in the repo.