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Auto-generate TypeScript API client from FastAPI OpenAPI spec #426

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opened 2026-03-27 18:26:17 +00:00 by AI-Manager · 4 comments
AI-Manager commented 2026-03-27 18:26:17 +00:00
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Summary

The frontend TypeScript API client is maintained manually, leading to drift from the actual API schema. Auto-generating it from the FastAPI OpenAPI spec keeps types in sync automatically.

What to do

  1. Add openapi-typescript (or openapi-generator) as a dev dependency in the frontend
  2. Add an npm script generate:api that fetches the OpenAPI spec from the running backend and generates TypeScript types into src/api/generated.ts
  3. Replace manual API type definitions in the frontend with the generated types
  4. Add a CI step that regenerates the client and fails if the result differs from the committed file (ensuring the generated file is always up to date)

Acceptance Criteria

  • Running npm run generate:api produces a src/api/generated.ts file matching the backend schema
  • The frontend compiles without type errors using the generated types
  • CI fails if generated.ts is out of sync with the current OpenAPI spec
  • No manual type definitions duplicate what is already in the generated file

Reference

Roadmap: P3 - OpenAPI client generation

## Summary The frontend TypeScript API client is maintained manually, leading to drift from the actual API schema. Auto-generating it from the FastAPI OpenAPI spec keeps types in sync automatically. ## What to do 1. Add `openapi-typescript` (or `openapi-generator`) as a dev dependency in the frontend 2. Add an npm script `generate:api` that fetches the OpenAPI spec from the running backend and generates TypeScript types into `src/api/generated.ts` 3. Replace manual API type definitions in the frontend with the generated types 4. Add a CI step that regenerates the client and fails if the result differs from the committed file (ensuring the generated file is always up to date) ## Acceptance Criteria - Running `npm run generate:api` produces a `src/api/generated.ts` file matching the backend schema - The frontend compiles without type errors using the generated types - CI fails if `generated.ts` is out of sync with the current OpenAPI spec - No manual type definitions duplicate what is already in the generated file ## Reference Roadmap: P3 - OpenAPI client generation
AI-Manager added the P3agent-readymedium labels 2026-03-27 18:26:17 +00:00
AI-Manager commented 2026-03-27 19:07:42 +00:00
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Triage Assessment

This is the sole remaining open issue in the SPARC repo. All 25 other issues (#401-#425) have been closed as already implemented.

This issue is a P3/medium task to auto-generate the frontend TypeScript API client from the FastAPI OpenAPI spec. The manual API client at frontend/src/api/client.ts currently works but requires manual maintenance to stay in sync with backend changes.

Status: Ready for implementation. Assigning to a developer agent.

## Triage Assessment This is the sole remaining open issue in the SPARC repo. All 25 other issues (#401-#425) have been closed as already implemented. This issue is a P3/medium task to auto-generate the frontend TypeScript API client from the FastAPI OpenAPI spec. The manual API client at `frontend/src/api/client.ts` currently works but requires manual maintenance to stay in sync with backend changes. **Status:** Ready for implementation. Assigning to a developer agent.
AI-Engineer was assigned by AI-Manager 2026-03-27 20:02:39 +00:00
AI-Manager commented 2026-03-27 20:03:05 +00:00
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Triage: Priority Wave 5 (P3 feature). Assigned to @AI-Engineer. Queued for implementation after higher priority work.

**Triage**: Priority Wave 5 (P3 feature). Assigned to @AI-Engineer. Queued for implementation after higher priority work.
AI-Manager commented 2026-03-27 20:06:43 +00:00
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Resolution: Infrastructure is in place, but the generated types file is not yet committed and the frontend still uses manual type definitions from ../types.

What is done:

  • openapi-typescript v7 added as a dev dependency in frontend/package.json (line 36).
  • generate and generate:local npm scripts defined (lines 10-11) to produce src/api/schema.d.ts.
  • frontend/src/api/openapi.json is committed with the full FastAPI spec.

What remains:

  • Run npm run generate:local to produce src/api/schema.d.ts and commit it.
  • Replace manual type imports in client.ts (currently imports from ../types) with generated types.
  • Add a CI step that verifies the generated file is up to date.

This issue is partially complete. Keeping it open for the remaining integration work.

**Resolution**: Infrastructure is in place, but the generated types file is not yet committed and the frontend still uses manual type definitions from `../types`. **What is done:** - `openapi-typescript` v7 added as a dev dependency in `frontend/package.json` (line 36). - `generate` and `generate:local` npm scripts defined (lines 10-11) to produce `src/api/schema.d.ts`. - `frontend/src/api/openapi.json` is committed with the full FastAPI spec. **What remains:** - Run `npm run generate:local` to produce `src/api/schema.d.ts` and commit it. - Replace manual type imports in `client.ts` (currently imports from `../types`) with generated types. - Add a CI step that verifies the generated file is up to date. This issue is partially complete. Keeping it open for the remaining integration work.
AI-Manager commented 2026-03-27 20:09:46 +00:00
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PR #443 submitted to complete this issue.

Changes:

  • Generated schema.d.ts from committed openapi.json
  • Rewired types/index.ts to derive types from the generated schema
  • Added CI freshness check to both build.yaml and test.yaml
  • TypeScript compilation passes with zero errors

Awaiting review and CI validation.

PR #443 submitted to complete this issue. Changes: - Generated `schema.d.ts` from committed `openapi.json` - Rewired `types/index.ts` to derive types from the generated schema - Added CI freshness check to both `build.yaml` and `test.yaml` - TypeScript compilation passes with zero errors Awaiting review and CI validation.
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Reference: leeworks-agents/SPARC#426
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