GitHub Actions

How to read data inside workflows with ${{ }}: github, env, vars, secrets, steps, needs and inputs contexts, status functions, and the GITHUB_OUTPUT / GITHUB_ENV / GITHUB_STEP_SUMMARY files.

Control how jobs relate: ordering with needs, conditions with if, fan-out with matrix, passing values with outputs, plus services, timeouts and environments.

Every way to start a workflow: push with branch, tag and path filters, pull requests, manual runs with inputs, cron schedules, releases and calls from other workflows.

A complete, minimal CI workflow where every single line is explained: name, triggers, permissions, concurrency, jobs, runner, steps, actions, inputs and commands.