Bootstrap Python Service

Purpose

Create production-oriented FastAPI starter layouts using one direct shell entrypoint backed by the shared bootstrap-uv-python-workspace scaffolding scripts.

When To Use

• Use this skill for new FastAPI service scaffolds.
• Use this skill when the user wants either a single service project or a workspace with service members.
• Hand off to bootstrap-uv-python-workspace only when the task is generic uv scaffolding without FastAPI-specific expectations.

Single-Path Workflow

1. Collect the required inputs:
   • name
   • mode
   • path
   • optional python, members, profile_map, force, initial_commit, no_git_init
2. Run the canonical entrypoint:

   scripts/init_python_service.sh --name <name> --mode <project|workspace>
   

3. Let the script delegate to the shared bootstrap-uv-python-workspace scaffolding layer.
4. Accept the built-in validation path:
   • uv run pytest
   • uv run ruff check .
   • uv run mypy .
5. Return the generated path plus the exact next-step run and check commands emitted by the script.

Commands

# 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

Inputs

• name: required
• mode: project or workspace; defaults to project
• path: optional target directory; defaults to ./<name>
• python: optional Python version; defaults to 3.13
• members: optional workspace member CSV for workspace mode
• profile_map: optional workspace profile CSV for workspace mode
• force: optional flag allowing non-empty target directories
• initial_commit: optional flag creating an initial commit after a successful scaffold
• no_git_init: optional flag disabling git initialization

Outputs

• status
  • success: scaffold and built-in validation completed
  • blocked: prerequisites or target-directory constraints prevented the run
  • failed: the script started but validation or generation failed
• path_type
  • primary: the canonical shell entrypoint completed
• output
  • resolved project or workspace path
  • emitted run commands
  • emitted validation commands

Defaults

• mode: project
• Python version: 3.13
• quality tooling: pytest, ruff, mypy
• workspace default members: core-lib,api-service
• workspace default profiles: first member package, remaining members service

Guardrails

• Refuse non-empty target directories unless --force is set.
• Require uv and git unless git initialization was explicitly disabled.
• Fail when workspace-only options are used in project mode.
• Fail when --initial-commit is combined with --no-git-init.

FastAPI Guidance

Use uv FastAPI integration style as primary guidance:

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

Fallbacks and Handoffs

• The preferred path is always scripts/init_python_service.sh.
• Use bootstrap-uv-python-workspace directly only when FastAPI-specific behavior is not wanted.
• Recommend bootstrap-python-mcp-service instead when the user wants a FastMCP server rather than an HTTP API 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

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

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

Optional machine-readable variant:

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

<PROMPT_BODY> template:

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>

Interactive Customization Workflow

1. Ask for mode, name, path, Python version, and git/force flags.
2. If workspace mode, also ask for members and profile map.
3. Return both:

• A YAML profile for durable reuse.
• The exact scaffold command to run.

4. Use this precedence order:

• CLI flags
• --config profile file
• .codex/profiles/bootstrap-python-service/customization.yaml
• ~/.config/gaelic-ghost/python-skills/bootstrap-python-service/customization.yaml
• Script defaults

5. If users want temporary reset behavior:

• --bypassing-all-profiles
• --bypassing-repo-profile
• --deleting-repo-profile

6. If users provide no customization or profile files, keep existing script defaults unchanged.
7. See references/interactive-customization.md for schema and examples.

References

• references/conventions.md
• references/customization.md
• references/interactive-customization.md

Script Inventory

• scripts/init_python_service.sh
• Delegates to the shared workspace bootstrap scripts shipped by bootstrap-uv-python-workspace.

Assets

• assets/README.md.tmpl