feat: automate OpenAPI spec + frontend TS type generation (issue #102) (#103)

* feat: add npm run api scripts and document API contract change flow Adds three root package.json scripts mirroring the sqlc convention: - api:spec — runs go generate to regenerate openapi.yaml - api:ts — runs openapi-typescript@7.4.4 to generate frontend/src/api/schema.ts - api — runs both in sequence (the single contributor command) Documents the full flow in a new AGENTS.md "API contract changes" section so contributors know which files to edit, how to regenerate, and what to verify. Implements slice 1 of issue #102. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> * fix: correct paths in AGENTS.md API contract changes section - api:ts equivalent command: use full relative path backend/internal/httpd/apispec/openapi.yaml, not bare openapi.yaml - verify command: prefix with `cd backend &&` so it works from repo root Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> * feat: add CI drift guard for OpenAPI spec and frontend TS types - Adds api-drift job to go.yml: regenerates openapi.yaml + schema.ts via `npm run api`, then fails if git diff detects any change - Expands go.yml path filter to trigger on package.json and schema.ts - Commits initial schema.ts generated from the current spec - Notes the CI guard in AGENTS.md API contract changes section Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> * fix: address review feedback on api-drift CI job - Scope git diff to schema.ts only; openapi.yaml drift is already caught by TestBuild_MatchesEmbedded in the build-test Go job - Add npm ci step so openapi-typescript is installed from the lockfile rather than re-fetched by npx on every run - Move openapi-typescript from npx -y to a pinned devDependency (exact 7.4.4, no caret) with a committed package-lock.json - Note in AGENTS.md Verify block that go test does not cover schema.ts drift Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> --------- Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-06-05 14:45:10 +05:30 · 2026-06-05 14:45:10 +05:30 · 6da5d93241
parent 19b6ca5093
commit 6da5d93241
5 changed files with 1657 additions and 1 deletions
--- a/.github/workflows/go.yml
+++ b/.github/workflows/go.yml
@ -6,6 +6,8 @@ on:
  pull_request:
    paths:
      - "backend/**"
+      - "frontend/src/api/schema.ts"
+      - "package.json"
      - ".github/workflows/go.yml"

 permissions:
@ -68,3 +70,28 @@ jobs:
          working-directory: backend
          # Blocking on the full ruleset: the tree is clean at zero findings, so
          # any new issue fails CI rather than being grandfathered.
+
+  api-drift:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-go@v5
+        with:
+          go-version-file: backend/go.mod
+          cache: false
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: "24"
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Regenerate API spec and TS types
+        run: npm run api
+
+      # openapi.yaml drift is already caught by TestBuild_MatchesEmbedded in
+      # the build-test job (go test -race ./...). Only schema.ts needs checking here.
+      - name: Check for schema.ts drift
+        run: git diff --exit-code -- frontend/src/api/schema.ts
--- a/AGENTS.md
+++ b/AGENTS.md
@ -18,6 +18,7 @@ From the repo root unless noted:
 npm run lint                         # backend go test ./... + golangci-lint v2.12.2
 npm run frontend:typecheck           # frontend TypeScript check
 npm run sqlc                         # regenerate backend/internal/storage/sqlite/gen from queries/schema
+npm run api                          # regenerate OpenAPI spec + frontend TS types (see API contract changes below)
 npx @redwoodjs/agent-ci run --all    # local workflow validation; requires Docker socket
 ```

@ -86,6 +87,32 @@ For code entry points:
 - Do not add network calls to tests unless the package already has an integration/e2e pattern for them. Prefer `httptest`, fakes, and injected dependencies.
 - Do not commit local run state, daemon data, temporary worktrees, build outputs, or credentials.

+## API contract changes
+
+The daemon API is code-first. The OpenAPI spec and frontend TypeScript types are generated artifacts — edit the source, then regenerate.
+
+**Source files to edit:**
+- `backend/internal/httpd/controllers/dto.go` — request/response shapes.
+- `backend/internal/httpd/apispec/specgen/build.go` — operation registry; add a `schemaNames` entry for any new named type.
+
+**Regenerate after editing:**
+```bash
+npm run api          # runs api:spec then api:ts in sequence
+```
+
+This is equivalent to running:
+```bash
+npm run api:spec     # cd backend && go generate ./internal/httpd/apispec/...
+npm run api:ts       # npx openapi-typescript@7.4.4 backend/internal/httpd/apispec/openapi.yaml -o frontend/src/api/schema.ts
+```
+
+**Verify:**
+```bash
+cd backend && go test ./internal/httpd/...    # spec drift + route/spec parity tests (does not cover schema.ts — that is checked by the api-drift CI job)
+```
+
+Commit `openapi.yaml` and `frontend/src/api/schema.ts` together with the Go changes. CI will regenerate both files and fail if the committed versions are out of date. The CLI hand-mirrored DTOs remain a deliberate manual boundary and are not generated.
+
 ## PR hygiene

 - Branch from `main` unless explicitly continuing an existing PR.
--- a/frontend/src/api/schema.ts
+++ b/frontend/src/api/schema.ts
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+      "integrity": "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "peer": true,
+      "bin": {
+        "tsc": "bin/tsc",
+        "tsserver": "bin/tsserver"
+      },
+      "engines": {
+        "node": ">=14.17"
+      }
+    },
+    "node_modules/uri-js-replace": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/uri-js-replace/-/uri-js-replace-1.0.1.tgz",
+      "integrity": "sha512-W+C9NWNLFOoBI2QWDp4UT9pv65r2w5Cx+3sTYFvtMdDBxkKt1syCqsUdSFAChbEe1uK5TfS04wt/nGwmaeIQ0g==",
+      "dev": true,
+      "license": "MIT"
+    },
+    "node_modules/yaml-ast-parser": {
+      "version": "0.0.43",
+      "resolved": "https://registry.npmjs.org/yaml-ast-parser/-/yaml-ast-parser-0.0.43.tgz",
+      "integrity": "sha512-2PTINUwsRqSd+s8XxKaJWQlUuEMHJQyEuh2edBbW8KNJz0SJPwUSD2zRWqezFEdN7IzAgeuYHFUCF7o8zRdZ0A==",
+      "dev": true,
+      "license": "Apache-2.0"
+    },
+    "node_modules/yargs-parser": {
+      "version": "21.1.1",
+      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-21.1.1.tgz",
+      "integrity": "sha512-tVpsJW7DdjecAiFpbIB1e3qxIQsE6NoPc5/eTdrbbIC4h0LVsWhnoa3g+m2HclBIujHzsxZ4VJVA+GUuc2/LBw==",
+      "dev": true,
+      "license": "ISC",
+      "engines": {
+        "node": ">=12"
+      }
+    }
+  }
+}
--- a/package.json
+++ b/package.json
@ -4,6 +4,12 @@
  "scripts": {
    "lint": "cd backend && go test ./... && go run github.com/golangci/golangci-lint/v2/cmd/golangci-lint@v2.12.2 run --path-mode=abs",
    "frontend:typecheck": "npm --prefix frontend run typecheck",
-    "sqlc": "cd backend && go run github.com/sqlc-dev/sqlc/cmd/sqlc@v1.31.1 generate"
+    "sqlc": "cd backend && go run github.com/sqlc-dev/sqlc/cmd/sqlc@v1.31.1 generate",
+    "api:spec": "cd backend && go generate ./internal/httpd/apispec/...",
+    "api:ts": "openapi-typescript backend/internal/httpd/apispec/openapi.yaml -o frontend/src/api/schema.ts",
+    "api": "npm run api:spec && npm run api:ts"
+  },
+  "devDependencies": {
+    "openapi-typescript": "7.4.4"
  }
 }