Add outputFormat for structured JSON output (a2a-claude) - #33
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…outputFormat Adds a ClaudeOutputFormat type and ClaudeConfig.outputFormat field, and threads it through buildQueryOptions to the SDK's Options.outputFormat. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Adds a trailing structuredData? parameter to publishFinalArtifact and publishLastChunkMarker, appending a JSON data part after the text part when structuredData is a non-null, non-array object. Text-only artifacts are unaffected. Lays the groundwork for Task 4 (a2a-claude) to publish structured output alongside text. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Capture the SDK result message's structured_output on a successful turn and forward it to publishFinalArtifact / publishLastChunkMarker, which append it as a JSON data part on the response artifact. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
…eset Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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Summary
Adds a
claude.outputFormatconfig option to a2a-claude that maps 1:1 onto the Claude Agent SDK'sOptions.outputFormat, enabling structured JSON output from the Claude session, and surfaces the SDK'sstructured_outputto A2A clients.This implements the
outputFormatitem from the a2a-claude Phase 2 roadmap.What changed
claude.outputFormatconfig (a2a-claude): new optional field of shape{ "type": "json_schema", "schema": { ...JSON Schema... } }, mapped straight through to the SDK inbuildQueryOptions. Omitted → SDK default (freeform text), so behaviour is unchanged when unset.validateConfig()rejects a malformedoutputFormat(non-object,typeother than"json_schema", or a missing/non-objectschema), matching the existing hand-rolledeffort/thinkingvalidators.structured_outputis published as an additiveapplication/jsondata part on theresponseartifact, alongside the usual text part.resultis always still emitted as text, so text-only clients are unaffected.@a2a-wrapper/core:publishFinalArtifact/publishLastChunkMarkergain an optional trailingstructuredDataparameter (backward-compatible; all existing call sites unchanged) that appends the data part via a sharedresponsePartshelper.outputFormatdefinition, and a changeset is included (a2a-claudeminor,@a2a-wrapper/corepatch).SDK behaviour notes
Verified against
@anthropic-ai/claude-agent-sdk@0.3.202:Options.outputFormatis exclusively{ type: 'json_schema'; schema }. On the result message,result: stringis always present andstructured_output?: unknownis additive — so surfacing is additive rather than a replacement.Testing
@a2a-wrapper/core: full suite passes, incl. new data-part tests.a2a-claude: new tests cover the SDK mapping, validation (5 rejection + 2 accept cases), and end-to-end structured-output surfacing. All suites pass.Note
Opened as a draft pending end-to-end behaviour verification against a live Claude session.