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Add image caching documentation and troubleshooting guide

Open mthalman opened this issue 4 weeks ago • 0 comments

Summary

  • Add new "Image Caching" section explaining the two levels of caching (matrix trimming and build-time caching)
  • Document cache conditions (base image digest and Dockerfile commit)
  • Add "Troubleshooting" section with three symptoms for why a Dockerfile might not be built

Test plan

  • [x] Review rendered markdown for formatting issues
  • [x] Verify internal links work correctly

🤖 Generated with Claude Code

mthalman avatar Dec 18 '25 15:12 mthalman