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Sweep 10 Nov 2026 · 02:18Z Build v2.1.322 539 read Stable v2.1.311 Latest v2.1.322 Next v2.1.322 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.260 ·

Structured-output tool now lints schemas for unsatisfiability

StructuredOutput schemas are now linted for internally-contradictory constraints.

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Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
Structured OutputArea: what it touches
ImprovementsKind: in v2.1.260,
ImprovementsSection of the release

StructuredOutput tool schemas are now analyzed for internally-contradictory constraints, such as crossed min/max bounds, required properties missing from properties with additionalProperties: false, and enum/const type mismatches, in addition to the existing strict-schema conversion. Findings are surfaced via a new unsatisfiable field and reported through the tengu_structured_output_schema_lint telemetry event.

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