Debug-action-cache _top_ -

If a compiler or script includes timestamps or non-deterministic paths, the hash will change every time, breaking cacheability.

: Use actions/cache/restore and actions/cache/save as separate steps to identify if the failure is during download or upload. 📊 Sample Debug Report Data

That is the difference between guessing and knowing. Happy debugging. debug-action-cache

The debug-action-cache process is the bridge between the theoretical speed of incremental builds and the practical reality of software complexity. As we move toward more distributed and cloud-native development environments, the ability to peer into the cache and resolve discrepancies is no longer an optional skill—it is a fundamental requirement for maintaining stable, scalable, and fast development cycles.

When you run a build and it takes longer than expected, or when a bug from an old commit mysteriously persists in a new build, your action cache is misbehaving. Cache issues generally fall into two categories. 1. Non-Deterministic Inputs (The Cache Poisoners) If a compiler or script includes timestamps or

As of mid-2026, GitHub has released (beta) which introduces:

To effectively debug these systems, we propose a three-tier diagnostic framework: Happy debugging

If you see Path exists: false , you know your working directory is wrong. Add working-directory: ./app to your step.

Or run a manual workflow with: