/generate-sdk

Overview

Orchestrate the end-to-end workflow for generating an SDK for a target language. This skill does not implement anything itself — it determines the right scenario, sequences the correct skills, and tracks progress across steps.

Inputs

• language — target language (e.g., ruby, python, node, go)
• scenario — A (backwards-compatible with existing SDK) or B (fresh, no existing SDK)
• project — path to the emitter project
• spec — path to the OpenAPI spec
• sdk_path — path to the live SDK (Scenario A only)

Reference Docs

• [Workflows](../../docs/architecture/workflows.md) — Phase 1 setup vs. Phase 2 ongoing spec updates
• [Pipeline](../../docs/architecture/pipeline.md) — three-stage parse/emit/write flow

Architecture

Emitters, extractors, smoke tests, and their unit tests all live in the emitter project, not in the oagen core repo. The emitter project depends on @workos/oagen for types and shared utilities.

Context Management

Sub-skills use subagents (via the built-in Explore agent type) to keep the main context lean. Read-heavy exploration — studying existing SDKs, reading reference implementations — is delegated to isolated agents that return only structured summaries. This prevents context rot during the write-heavy generation steps that follow.

Each sub-skill documents where it uses subagents:

• /generate-emitter — Step 1a (SDK exploration) and Steps 3-5 (reference emitter reading)
• /generate-extractor — Prerequisites (SDK exploration)
• /generate-smoke-test — Prerequisites (reference smoke script reading) and Step 2 (SDK SERVICE_MAP)
• /verify-compat — Step 1 (baseline extraction spot-check)

Step 1: Gather Inputs

Collect these values via AskUserQuestion. If any were provided as arguments, skip the corresponding question.

1. language — target language (e.g., ruby, python, php, node)
2. scenario — which workflow to use:

> A. Backwards compatible — There's a published SDK with consumers who depend on its public API. The generated SDK must match the existing surface. > > B. Fresh — No existing SDK to preserve, or you're intentionally replacing one. No compat constraints.

1. sdkpath (Scenario A only)_ — path to the existing SDK. Validate the path exists (look for package.json, Gemfile, go.mod, pyproject.toml, or similar).
2. project — emitter project path (e.g., ../oagen-emitters/node). Create if needed:

``bash mkdir -p {project}/src/{language} && mkdir -p {project}/test/{language} ``

1. spec — path to the OpenAPI spec (e.g., ../openapi.yaml)

Store all values and pass them to all sub-skill invocations.

Step 2: Present the Plan

Scenario A — Backwards compatible

Step 1: /generate-emitter {language} {project} sdk_path={sdk_path}    — study existing SDK, scaffold emitter
Step 2: /generate-extractor {language} sdk_path={sdk_path}            — scaffold extractor
Step 3: /verify-compat {language} sdk_path={sdk_path}                 — extract baseline, verify
Step 4: /generate-smoke-test {language}                               — smoke tests against output dir
Step 5: /verify-smoke-test {language}                                 — iterate until clean
Step 6: /integrate {language} sdk_path={sdk_path}                     — merge into live SDK

Scenario B — Fresh

Step 1: /generate-emitter {project} {language}    — scaffold emitter
Step 2: /generate-smoke-test {language}            — wire-level HTTP parity tests
Step 3: /verify-smoke-test {language}              — run smoke tests

Lifecycle note: Scenario B is a one-time bootstrap. Once the generated SDK ships, it becomes the live SDK. All future spec updates follow Scenario A — use --target to integrate into the live SDK and --api-surface to preserve backwards compatibility.

Confirm with the user, then invoke the first skill.

Step 3: Run Skills in Sequence

Invoke each skill in order using the Skill tool, passing project through. After each skill, validate:

# After /generate-emitter — design doc, entry point, and tests
ls {project}/docs/sdk-architecture/{language}.md
ls {project}/src/{language}/index.ts
cd {project} && npx vitest run test/{language}/ 2>&1 | tail -5

# After /generate-extractor — extractor registered with hints
grep -l "{language}Extractor\|{language}_extractor" {project}/src/plugin.ts {project}/src/index.ts
grep -l "hints" {project}/src/compat/extractors/{language}.ts

# After /verify-compat — handled by the skill itself

# After /generate-smoke-test — script exists
ls {project}/smoke/sdk-{language}.ts

# After /verify-smoke-test — handled by the skill itself

# After /integrate — changes visible in live SDK
cd {sdk_path} && git diff --stat

For Scenario A: After /generate-emitter, also verify the design doc references real SDK patterns:

grep -c "existing SDK\|from src/" {project}/docs/sdk-architecture/{language}.md

If a skill fails or the user wants to pause, note where they stopped. They can resume by running the remaining skills individually.

Step 4: Final Checklist

Run the full validation suite:

cd {project} && npx vitest run    # emitter project
npx tsc --noEmit                  # oagen core type check
npx tsup                          # oagen core build

Then present the summary:

=== {language} SDK support: COMPLETE ===

Scenario: {A/B}
Skills completed:
  [x] /generate-emitter {language}
  [x] /generate-extractor {language}     (Scenario A only)
  [x] /verify-compat {language}          (Scenario A only)
  [x] /integrate {language}              (Scenario A only)
  [x] /generate-smoke-test {language}

Validation:
  Emitter tests:    {N} passed, {N} failed
  Type check:       PASS/FAIL
  Build:            PASS/FAIL

Only include this next section in the output if this is Scenario A:

Output

This skill produces, via its sub-skills:

• A complete language emitter registered in the plugin bundle (src/plugin.ts)
• An API surface extractor (Scenario A only)
• A smoke test script at smoke/sdk-{language}.ts
• Generated SDK code at {project}/sdk/
• Integration into the live SDK (Scenario A only)