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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 v2.1.0 7 Jan 2026

Paste Content Caching

What

Large pasted content is now cached to disk rather than stored inline in session transcripts.

Details

Content larger than 1KB is stored in a separate paste-cache directory
Content is hashed (SHA-256, truncated to 16 chars) and stored as individual text files
Old paste cache files are automatically cleaned up on startup based on age
This reduces memory pressure and transcript file sizes for sessions with large pastes

Evidence

OMB() at line 225421, MMB() at line 225432, RMB() at line 225443 (paste storage/retrieval/cleanup, uses "paste-cache" directory)

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.0 →