feat(ai-gemini): stream structured outputs natively - #971
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📝 WalkthroughWalkthroughNative structured-output streaming was added to the Gemini text and experimental Gemini Interactions adapters. Both accumulate JSON deltas, emit parsed completion events before terminal events, handle stream failures, and add tests plus E2E feature coverage. ChangesGemini structured-output streaming
Estimated code review effort: 3 (Moderate) | ~25 minutes Sequence Diagram(s)sequenceDiagram
participant Caller
participant GeminiAdapter
participant GeminiAPI
participant Consumer
Caller->>GeminiAdapter: structuredOutputStream(options)
GeminiAdapter->>GeminiAPI: Request JSON schema with streaming enabled
GeminiAPI-->>GeminiAdapter: JSON text deltas
GeminiAdapter-->>Consumer: TEXT_MESSAGE_CONTENT chunks
GeminiAdapter-->>Consumer: structured-output.complete
GeminiAdapter-->>Consumer: RUN_FINISHED
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Verify each finding against current code. Fix only still-valid issues, skip the
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Inline comments:
In `@packages/ai-gemini/src/adapters/text.ts`:
- Around line 229-283: The structuredOutputStream method uses inconsistent run
IDs between stream processing and structured-stream errors. Resolve a single
runId, using the existing override-or-generated fallback behavior, create an
options object containing it, and pass that same object to processStreamChunks
and every structuredStreamError call so all emitted events share the resolved
ID.
In `@packages/ai-gemini/tests/gemini-adapter.test.ts`:
- Line 3: Reorder the named imports from `@tanstack/ai` alphabetically to satisfy
ESLint sort-imports in packages/ai-gemini/tests/gemini-adapter.test.ts:3-3 and
packages/ai-gemini/tests/text-interactions-adapter.test.ts:3-3; update only the
import member ordering.
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Fix all unresolved CodeRabbit comments on this PR:
- Push a commit to this branch (recommended)
- Create a new PR with the fixes
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📒 Files selected for processing (6)
.changeset/tidy-gemini-streams.mdpackages/ai-gemini/src/adapters/text.tspackages/ai-gemini/src/experimental/text-interactions/adapter.tspackages/ai-gemini/tests/gemini-adapter.test.tspackages/ai-gemini/tests/text-interactions-adapter.test.tstesting/e2e/src/lib/feature-support.ts
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Thanks for the PR, @Missing-Identity! 🙌 @jherr will take a look. Automated pre-review checks
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Maintainer sweep: rebased onto |
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What changed
structuredOutputStreamsupport to the standard Gemini text adapterstructured-output.completeCloses #570.
Validation
@tanstack/ai-geminitest suite: 239 passed@tanstack/ai-geminiTypeScript check: passed@tanstack/ai-geminiESLint: no errors; seven pre-existing warnings@tanstack/ai-geminiproduction build: passedgit diff --check: passedLimitations
The hosted environment could not download Playwright Chromium, so browser E2E execution was not claimed. The existing structured-output-stream E2E matrix was updated to include Gemini.
Summary by CodeRabbit
structured-output.completecustom event with the parsed JSON result (plus the original text) before the final completion event.