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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 v2.1.248 ·

Tool references are filtered per call, not per tool name

Retracting a tool mid-conversation no longer wipes earlier valid calls to it.

You'll notice Improvements
JSON All of v2.1.248
You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
ToolsArea: what it touches
ImprovementsKind: in v2.1.248,
ImprovementsSection of the release
What

When a tool is retracted partway through a conversation, references to it are now filtered by the specific call they belong to rather than by tool name alone, so earlier valid calls to a still-known tool are left intact.

Evidence

Filtering out tool_reference for unavailable tool:

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

See this entry in the whole of v2.1.248 →

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