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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 v2.1.229 ·

Tool-result mismatch diagnostics no longer send raw ids

Error reports about mismatched tool calls now scrub odd identifiers instead of sending them raw.

Under the hood Internal Changes
JSON All of v2.1.229
Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
TelemetryArea: what it touches
Internal ChangesKind: in v2.1.229,
Internal ChangesSection of the release
What

The report that fires when a tool call has no matching result now type-checks content blocks, coerces roles to user, assistant, system or unknown, and reports ids that do not match the expected shape as "nonconforming" instead of sending them verbatim.

Evidence

tengu_tool_use_tool_result_mismatch_error

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

See this entry in the whole of v2.1.229 →

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