GitHub Actions has a built-in mechanism to increase log verbosity.
: Use the mxschmitt/action-tmate action to pause your workflow and SSH into the runner. This allows you to manually check if the files were actually restored to the directory you expected. debug-action-cache
Before we debug, we must understand the architecture. When a CI job runs, it typically starts in a fresh, ephemeral environment. Without caching, every job would re-download dependencies (npm, pip, Maven, apt), re-compile code, or re-pull Docker layers. GitHub Actions has a built-in mechanism to increase
Create a minimal job that only attempts to restore the cache without building: Before we debug, we must understand the architecture
: Caches are scoped by branch. A cache created on a feature branch isn't available to other feature branches, though they can all access the default branch's cache. Job Success Requirement actions/cache
When using GitHub Actions, debugging the cache often involves setting: ACTIONS_STEP_DEBUG: true
debug-action-cache-<date> Repository: <owner/repo> Workflow: <workflow-name>.yml Runner: [ubuntu-latest | windows-latest | macos-latest | self-hosted]