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Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.309 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.246 ·

Write skips the diff for very large files

Writing over a very large file skips diff computation, so it no longer stalls.

You'll notice Improvements
JSON All of v2.1.246
You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
File ToolsArea: what it touches
ImprovementsKind: in v2.1.246,
ImprovementsSection of the release
What

Writing over a very large file no longer computes or returns a full structured patch. The tool returns an empty patch and no original file contents, skips the extra git-diff work done in cloud sessions, and passes the raw old and new text straight to the diff-metrics call.

Details
  • The size threshold is a fixed build constant, not a setting.
  • The skipped cloud-session work is the step reported as tengu_tool_use_diff_computed.
Evidence

tengu_tool_use_diff_computed

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

How sure we are
One source agreesOne thing we can check says the same as this entry.
Anthropic's release notes agreeFixed the UI stopping with a render error on the first tool call when a third-party Anthropic-compatible endpoint (ANTHROPIC_BASE_URL)…

See this entry in the whole of v2.1.246 →

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