---
name: azsdk-common-generate-sdk-locally
license: MIT
metadata:
  version: "1.1.0"
  distribution: shared
description: "Generate, build, and test Azure SDKs locally from TypeSpec with automatic customization. WHEN: \"generate SDK locally\", \"build SDK\", \"run SDK tests\", \"run CI checks\", \"validate package\", \"run checks\", \"update changelog\", \"fix SDK build errors\", \"fix breaking changes\", \"resolve SDK generation errors\", \"customize TypeSpec\", \"rename SDK client\", \"rename SDK model\", \"hide operation from SDK\", \"fix analyzer errors\", \"resolve customization drift\", \"create subclient\", \"update metadata\", \"update version\". DO NOT USE FOR: publishing to package registries, CI pipeline configuration, API design review. INVOKES: azsdk_verify_setup, azsdk_package_generate_code, azsdk_package_build_code, azsdk_package_run_check, azsdk_package_run_tests, azsdk_customized_code_update, azsdk_package_update_changelog_content, azsdk_package_update_metadata, azsdk_package_update_version."
compatibility: "azure-sdk-mcp server, local azure-sdk-for-{language} clone, language build tools"
---

# Generate SDK Locally

This skill generates, builds, and tests Azure SDKs locally from TypeSpec with automatic customization support, covering the end-to-end workflow for fixing generation issues, applying SDK-specific updates, and refreshing package metadata when needed.

## Triggers

USE FOR: generate, build, and test Azure SDKs locally from TypeSpec with automatic customization; update changelog; fix SDK build errors; fix breaking changes; resolve SDK generation errors; customize TypeSpec; rename SDK client or model; hide operation from SDK; fix analyzer errors; resolve customization drift; create subclient; update metadata; update version
WHEN: "generate SDK locally", "build SDK", "run SDK tests", "update changelog", "fix SDK build errors", "fix breaking changes", "resolve SDK generation errors", "customize TypeSpec", "rename SDK client", "rename SDK model", "hide operation from SDK", "fix analyzer errors", "resolve customization drift", "create subclient", "update metadata", "update version"
DO NOT USE FOR: publishing to package registries, CI pipeline configuration, API design review

## Rules

- Requires the `azure-sdk-mcp` server for the MCP workflow; without MCP, use `npm exec --prefix eng/common/tsp-client -- tsp-client` CLI.
- Verify the target language repo and the correct TypeSpec configuration file before generation.
- After generation or customization, run the check and test steps before updating metadata or finalizing changes.

## MCP Tools

| Tool | Purpose |
|------|---------|
| `azure-sdk-mcp:azsdk_verify_setup` | Verify environment |
| `azure-sdk-mcp:azsdk_package_generate_code` | Generate SDK |
| `azure-sdk-mcp:azsdk_package_build_code` | Build package |
| `azure-sdk-mcp:azsdk_package_run_check` | Validate package |
| `azure-sdk-mcp:azsdk_package_run_tests` | Run tests |
| `azure-sdk-mcp:azsdk_customized_code_update` | Apply customizations (includes regeneration and build) |
| `azure-sdk-mcp:azsdk_package_update_changelog_content` | Update changelog |
| `azure-sdk-mcp:azsdk_package_update_metadata` | Update metadata including ci.yml |
| `azure-sdk-mcp:azsdk_package_update_version` | Update version |

Prerequisites: azure-sdk-mcp server must be running. Without MCP, use `npx tsp-client` CLI.

## Steps

1. **Select language** — Confirm target language: .NET, Java, JavaScript, Python, Go, or Rust.
2. **Verify repo** — Ensure the user has a local clone of the correct [SDK repo](references/sdk-repos.md). If not cloned, instruct user to clone it.
3. **Identify config file** — Determine the path to the TypeSpec configuration file. See [config file details](references/detailed-workflow.md).
   - From `azure-rest-api-specs` repo: use path to `tspconfig.yaml`.
   - From an SDK language repo: use path to `tsp-location.yaml`.
4. **Verify setup** — Run `azure-sdk-mcp:azsdk_verify_setup` to confirm environment.
5. **Generate** — Run `azure-sdk-mcp:azsdk_package_generate_code` with the config file path.
6. **Build** — Run `azure-sdk-mcp:azsdk_package_build_code`. If build succeeds, proceed to step 8.
7. **Customize** — If build fails, or if user requests SDK modifications, run `azure-sdk-mcp:azsdk_customized_code_update` with the build errors or user request. The tool handles the full workflow internally: it classifies the issue, applies TypeSpec decorators and/or code patches, regenerates the SDK, and builds — all in one call. See [customization workflow](references/customization-workflow.md).
8. **Commit checkpoint** — Prompt the user to commit generated changes before proceeding. See [commit checkpoint details](references/detailed-workflow.md).
9. **Validate** — Run `azure-sdk-mcp:azsdk_package_run_check` and `azure-sdk-mcp:azsdk_package_run_tests`.
10. **Metadata** — Run `azure-sdk-mcp:azsdk_package_update_changelog_content`, `azure-sdk-mcp:azsdk_package_update_metadata`, and `azure-sdk-mcp:azsdk_package_update_version`. _(Note: For .NET data plane, skip this step — metadata, changelog, and version updates are per-commit tasks, not part of the generate/build/test workflow.)_
11. **Final commit** — Prompt the user to commit final changes (changelog, metadata, version). See [commit checkpoint details](references/detailed-workflow.md).

[SDK repos](references/sdk-repos.md) | [Customization workflow](references/customization-workflow.md) | [Detailed workflow](references/detailed-workflow.md)

## Guardrails

- **NEVER modify generated SDK code files directly for customizations.** Always use `azure-sdk-mcp:azsdk_customized_code_update`. It handles classification, TypeSpec decorators, code patches, regeneration, and build as a single atomic workflow.
- If `azure-sdk-mcp:azsdk_customized_code_update` fails or times out, **report the error to the user** and suggest retrying. Do not attempt to replicate its behavior by editing files manually.
- Only the customization tool understands the correct layering of TypeSpec decorators vs code patches and ensures regenerated code stays consistent.

## Examples

- "Generate the SDK locally for my TypeSpec service"
- "Build and test the Python SDK package"
- "Run CI checks for my SDK package"
- "Fix the SDK build errors on this PR"
- "The SDK generation has breaking changes, resolve them"
- "Rename FooClient to BarClient for .NET"
- "Hide the internal polling operation from the Python SDK"
- "Fix .NET analyzer errors AZC0030 and AZC0012"
- "The build is failing because a customization references a renamed property"
- "Create a subclient architecture for the Python SDK"
- "Apply TypeSpec customizations to fix compilation errors"
- "Update the changelog for this SDK package"
- "Update the package version"
- "Update the package metadata and ci.yml"

## Troubleshooting

- Run `azure-sdk-mcp:azsdk_verify_setup` to confirm MCP and tools.
- If build fails with type conflicts, breaking changes, analyzer errors, or customization drift, use `azure-sdk-mcp:azsdk_customized_code_update` to apply customizations.
- The customization tool uses a two-phase approach: TypeSpec decorators first (Phase A), then code repairs if needed (Phase B).
- If `azure-sdk-mcp:azsdk_customized_code_update` fails or times out, report the error and retry. Do not manually edit generated SDK code — manual edits will be overwritten on the next regeneration.
- Without MCP, use `npx tsp-client` CLI.
