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fix(aikit): convert strict tool schemas to the strict subset - #61
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Port strict JSON-schema conversion with prefer/require fallback, strip optional nulls before validation, pass constrainedSampling through plugin ToolDef, and decode harness args via the JSON codec. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This was referenced Oct 10, 2026
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Summary
constrainedSampling: { type: "json_schema" }now sends a strict-subset schema (closed objects, all properties required, optional ones nullable) instead of the raw schema withstrict: true, which Anthropic rejected (additionalProperties: true400)."prefer"falls back to non-strict when the provider can't express the schema;"require"throws.normalizeOptionalNullsstrips nulls for omitted optional args before validation.ToolDef.constrainedSampling, passed throughtoAikitTool.Schema.toCodecJson; bash opts intostrict: "prefer".Test plan
vp check,vp run typecheck, aikit + harness suites greenvp test run test/settings.live.test.tsgreen on all 6 live providerstimeout: nullruns🤖 Generated with Claude Code