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@mthalman mthalman commented Dec 18, 2025

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

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

🤖 Generated with Claude Code

Document the two levels of image caching (matrix trimming and build-time
caching), explain the cache conditions, and add a troubleshooting section
for diagnosing why a Dockerfile might not be built.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
@mthalman mthalman requested a review from a team as a code owner December 18, 2025 15:50
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