Agent skill

bootstrap-python-service

Bootstrap Python FastAPI services on macOS using uv with consistent project and workspace scaffolds. Use when creating a new backend/API service from scratch, scaffolding a single uv service project, scaffolding a uv workspace with package/service members, initializing pytest+ruff+mypy defaults, creating README.md, initializing git, and running initial validation commands.

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Install this agent skill to your Project

npx add-skill https://github.com/majiayu000/claude-skill-registry/tree/main/skills/other/other/bootstrap-python-service

SKILL.md

Bootstrap Python Service

Create production-oriented FastAPI starter layouts using shared uv project/workspace scaffolding.

Workflow

  1. Choose mode:
  • Project: single FastAPI service scaffold.
  • Workspace: multi-member uv workspace scaffold.
  1. Run scripts/init_python_service.sh with explicit --name and optional --path, --python, --force, --no-git-init, --initial-commit.
  2. For workspace mode, optionally pass --members and --profile-map.
  3. Verify quality checks:
  • uv run pytest
  • uv run ruff check .
  • uv run mypy .
  1. Return exact next run/test commands.

Commands

bash
# Project mode (default)
scripts/init_python_service.sh --name my-service

# Project mode with explicit options
scripts/init_python_service.sh --name my-service --mode project --python 3.13 --path /tmp/my-service

# Workspace mode with defaults (core-lib package + api-service service)
scripts/init_python_service.sh --name platform --mode workspace

# Workspace mode with explicit members and profile mapping
scripts/init_python_service.sh \
  --name platform \
  --mode workspace \
  --members "core-lib,billing-service,orders-service" \
  --profile-map "core-lib=package,billing-service=service,orders-service=service"

# Allow non-empty target directory
scripts/init_python_service.sh --name my-service --force

# Skip git initialization
scripts/init_python_service.sh --name my-service --no-git-init

# Create initial commit
scripts/init_python_service.sh --name my-service --initial-commit

FastAPI Guidance

Use uv FastAPI integration style as primary guidance:

bash
uv add fastapi --extra standard
uv run fastapi dev app/main.py
# optional production-style local run
uv run fastapi run app/main.py

Guardrails

  • Refuse non-empty target directories unless --force is set.
  • Require uv and git (unless --no-git-init is set and no initial commit is requested).
  • Fail when workspace-only options are used in project mode.
  • Fail when --initial-commit is used with --no-git-init.

Defaults

  • Mode: project
  • Python version: 3.13
  • Quality tooling: pytest, ruff, mypy
  • Workspace defaults (when mode is workspace):
  • Members: core-lib,api-service
  • Profiles: first member package, remaining members service

Automation Suitability

  • Codex App automation: Medium. Useful for recurring FastAPI scaffold smoke checks and regression checks.
  • Codex CLI automation: High. Strong fit for CI or scheduled scaffolder reliability checks.

Codex App Automation Prompt Template

markdown
Use $bootstrap-python-service.

Scope boundaries:
- Work only inside <REPO_PATH>.
- Create or validate scaffold output only in <TARGET_PATH>.
- Limit activity to scaffolding and verification; no unrelated refactors.

Task:
1. If <MODE:PROJECT|WORKSPACE> is PROJECT, run:
   `scripts/init_python_service.sh --name <SERVICE_NAME> --mode project --path <TARGET_PATH> --python <PYTHON_VERSION> <FORCE_FLAG> <GIT_INIT_MODE>`
2. If <MODE:PROJECT|WORKSPACE> is WORKSPACE, run:
   `scripts/init_python_service.sh --name <SERVICE_NAME> --mode workspace --path <TARGET_PATH> --python <PYTHON_VERSION> --members "<MEMBERS_CSV>" --profile-map "<PROFILE_MAP>" <FORCE_FLAG> <GIT_INIT_MODE>`
3. Validate generated checks:
   - `uv run pytest`
   - `uv run ruff check .`
   - `uv run mypy .`
4. If mode is PROJECT, also validate generated run commands:
   - `uv run fastapi dev app/main.py`
   - `uv run fastapi run app/main.py`

Output contract:
1. STATUS: PASS or FAIL
2. GENERATED_PATH: final output path
3. COMMANDS: exact commands executed
4. RESULTS: concise check outputs
5. If FAIL: short root-cause summary and minimal remediation steps

Codex CLI Automation Prompt Template

bash
codex exec --full-auto --sandbox workspace-write --cd "<REPO_PATH>" "<PROMPT_BODY>"

Optional machine-readable variant:

bash
codex exec --json --full-auto --sandbox workspace-write --cd "<REPO_PATH>" "<PROMPT_BODY>"

<PROMPT_BODY> template:

markdown
Use $bootstrap-python-service.
Scope is scaffolding plus verification only in <TARGET_PATH> under <REPO_PATH>.
Run the scaffold command for <MODE:PROJECT|WORKSPACE>, then run pytest, ruff, and mypy.
If project mode, confirm FastAPI dev/run commands are valid.
Return STATUS, generated path, exact command transcript, and minimal remediation on failure.

Customization Placeholders

  • <REPO_PATH>
  • <SERVICE_NAME>
  • <MODE:PROJECT|WORKSPACE>
  • <TARGET_PATH>
  • <PYTHON_VERSION>
  • <MEMBERS_CSV>
  • <PROFILE_MAP>
  • <FORCE_FLAG>
  • <GIT_INIT_MODE>

Resources

scripts/

  • init_python_service.sh: thin orchestrator that delegates to bootstrap-uv-python-workspace scripts.

references/

  • conventions.md: runtime, dependency, and quality defaults.

assets/

  • README.md.tmpl: README template for service-focused output.

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