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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 v2.1.62

1 entries read diff v2.1.61 → v2.1.62 Markdown

This is a minimal maintenance release with no user-facing changes. The only functional modification is an internal optimization to prompt cache breakpoint placement, which may improve API cache hit rates.

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1 entry

Changesopen

Optimized prompt cache breakpoint placement#

What

Cache breakpoints are now applied to the last two messages in a conversation instead of only the final message, potentially improving cache hit rates with the Anthropic API.

Details
  • Previously, only the very last message in a conversation received a cache breakpoint marker
  • Now the last two messages both receive cache breakpoints, increasing the likelihood of cache reuse when new messages are appended
  • The skipCacheWrite flag now only suppresses the breakpoint on the final message, leaving the second-to-last message always cached
  • This is an internal optimization; users may experience marginally faster response times due to improved cache utilization, but no action is required
Evidence

Cache breakpoint logic in message preparation (search for "tengu_api_cache_breakpoints") — K$z() at line ~519758

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

1 entry

Notesopen

#

This release contains no new features, no bug fixes, no new CLI flags, no new slash commands, and no new feature flags. The tengu_ flag count remains unchanged at 938. Structural similarity between v2.1.61 and v2.1.62 is 99.9%, with the remaining differences being import style changes (default imports converted to named imports) and the single cache breakpoint adjustment described above.

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

Verbatim
Official · Anthropic

Anthropic’s official release notes

Published verbatim by Anthropic for v2.1.62. Text is unmodified from the upstream changelog. Everything else on this page came out of the bundle instead, which is why the two lists don't match.

  • Fixed prompt suggestion cache regression that reduced cache hit rates
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System prompt

The system prompt was not captured for this release, so this page cannot say whether it moved.

Which releases were captured →