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DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

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Claude Code v2.0.15 14 Oct 2025

Write Tool File Caching

What: The conversation context file cache now tracks Write tool results in addition to Read tool results, improving context awareness.

Details:

Function HMQ() at line 460001 now accepts file paths from both Read and Write tools
Caches file content from Write operations with timestamps
Helps maintain accurate file state tracking across tool uses
Path normalization now works for both read and write operations
Evidence: v2.0.14 function yLQ() at line 458431 only tracked Read tool (check at line 458451); v2.0.15 tracks both Read and Write tools (Write check added at lines 460014-460020)

See this entry in the whole of v2.0.15 →