bootstrap-python-mcp-service

Bootstrap Python MCP server projects and workspaces on macOS using uv and FastMCP with consistent defaults. Use when creating a new MCP server from scratch, scaffolding a single uv MCP project, scaffolding a uv workspace with package/service members, customizing scaffold defaults through layered YAML profiles, initializing pytest+ruff+mypy defaults, creating README.md, initializing git, running initial validation checks, or starting from OpenAPI/FastAPI with MCP mapping guidance.

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Install skill "bootstrap-python-mcp-service" with this command: npx skills add gaelic-ghost/python-skills/gaelic-ghost-python-skills-bootstrap-python-mcp-service

Bootstrap Python MCP Service

Purpose

Create FastMCP starter layouts using one direct shell entrypoint backed by the shared bootstrap-uv-python-workspace scaffolding scripts plus deterministic MCP overlay logic.

When To Use

  • Use this skill for new FastMCP server scaffolds.
  • Use this skill when the user wants OpenAPI or FastAPI-to-MCP mapping guidance alongside bootstrap.
  • Recommend bootstrap-python-service when the user wants a FastAPI service but not an MCP server.

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_fastmcp_service.sh --name <name> --mode <project|workspace>
  3. Let the script delegate to the shared bootstrap-uv-python-workspace scaffolding layer, then apply the FastMCP overlay.
  4. Accept the built-in validation path:
    • uv run pytest
    • uv run ruff check .
    • uv run mypy .
  5. If the task starts from an existing API, optionally generate a mapping report with uv run scripts/assess_api_for_mcp.py ....
  6. Return the generated path plus the exact next-step commands emitted by the script.

Commands

# Project mode (default)
scripts/init_fastmcp_service.sh --name my-mcp-server

# Project mode with explicit options
scripts/init_fastmcp_service.sh --name my-mcp-server --mode project --python 3.13 --path /tmp/my-mcp-server

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

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

# Allow non-empty target directory
scripts/init_fastmcp_service.sh --name my-mcp-server --force

# Skip git initialization
scripts/init_fastmcp_service.sh --name my-mcp-server --no-git-init

# Create initial commit
scripts/init_fastmcp_service.sh --name my-mcp-server --initial-commit

# Generate MCP mapping guidance from OpenAPI
uv run scripts/assess_api_for_mcp.py --openapi ./openapi.yaml --out ./mcp_mapping_report.md

# Generate MCP mapping guidance from existing FastAPI app
uv run scripts/assess_api_for_mcp.py --fastapi app.main:app --out ./mcp_mapping_report.md

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
    • optional mapping-report path

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

Base UV/FastAPI Guidance

The shared scaffold basis follows uv FastAPI integration style:

uv add fastapi --extra standard
uv run fastapi dev app/main.py

This skill then overlays FastMCP dependencies and server files for MCP service members.

API Import Guidance

When starting from OpenAPI or FastAPI, bootstrap first, then map endpoints to MCP primitives:

  1. Generate mapping report with scripts/assess_api_for_mcp.py.
  2. Classify endpoints into Resources, Tools, and Prompts.
  3. Recommend RouteMaps/Transforms only when they improve usability.
  4. Keep bootstrap deterministic; defer heavy custom mapping unless requested.

FastMCP Docs Lookup

Use the fastmcp_docs MCP server for up-to-date framework details.

Suggested queries:

  • FastMCP quickstart server example
  • FastMCP tools resources prompts best practices
  • FastMCP RouteMap Transform
  • FastMCP from OpenAPI
  • FastMCP from FastAPI

Guardrails

  • Refuse non-empty target directories unless --force is set.
  • Require at least one service profile member in workspace mode.
  • 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.

Fallbacks and Handoffs

  • The preferred path is always scripts/init_fastmcp_service.sh.
  • Use bootstrap-python-service when the user wants FastAPI-only output.
  • Use bootstrap-uv-python-workspace directly only when FastMCP-specific behavior is not wanted.

Automation Suitability

  • Codex App automation: Medium. Useful for recurring FastMCP scaffold checks and mapping-assessment checks.
  • Codex CLI automation: High. Strong fit for CI-style scaffold validation.

Codex App Automation Prompt Template

Use $bootstrap-python-mcp-service.

Scope boundaries:
- Work only inside <REPO_PATH>.
- Create or validate scaffold output only in <TARGET_PATH>.
- Restrict work to scaffold generation, optional mapping report generation, and verification.

Task:
1. If <MODE:PROJECT|WORKSPACE> is PROJECT, run:
   `scripts/init_fastmcp_service.sh --name <MCP_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_fastmcp_service.sh --name <MCP_SERVICE_NAME> --mode workspace --path <TARGET_PATH> --python <PYTHON_VERSION> --members "<MEMBERS_CSV>" --profile-map "<PROFILE_MAP>" <FORCE_FLAG> <GIT_INIT_MODE>`
3. If <GENERATE_MAPPING_REPORT:TRUE|FALSE> is TRUE:
   - If <MAPPING_INPUT_MODE:NONE|OPENAPI|FASTAPI_IMPORT> is OPENAPI, run:
     `uv run scripts/assess_api_for_mcp.py --openapi <MAPPING_INPUT_PATH> --out <TARGET_PATH>/mcp_mapping_report.md`
   - If <MAPPING_INPUT_MODE:NONE|OPENAPI|FASTAPI_IMPORT> is FASTAPI_IMPORT, run:
     `uv run scripts/assess_api_for_mcp.py --fastapi <MAPPING_INPUT_PATH> --out <TARGET_PATH>/mcp_mapping_report.md`
4. Run verification checks in <TARGET_PATH>:
   - `uv run pytest`
   - `uv run ruff check .`
   - `uv run mypy .`

Output contract:
1. STATUS: PASS or FAIL
2. COMMANDS: exact commands executed
3. RESULTS: concise outcomes for scaffold and checks
4. If report generated: include report path
5. If FAIL: provide likely root cause and minimal remediation

Codex CLI Automation Prompt Template

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

<PROMPT_BODY> template:

Use $bootstrap-python-mcp-service.
Scope is limited to scaffold generation in <TARGET_PATH>, optional mapping report generation, and verification checks.
Run only commands needed for this flow, then return STATUS, exact command transcript, concise results, and minimal remediation if failures occur.

Customization Placeholders

  • <REPO_PATH>
  • <MCP_SERVICE_NAME>
  • <MODE:PROJECT|WORKSPACE>
  • <TARGET_PATH>
  • <PYTHON_VERSION>
  • <MEMBERS_CSV>
  • <PROFILE_MAP>
  • <FORCE_FLAG>
  • <GIT_INIT_MODE>
  • <MAPPING_INPUT_MODE:NONE|OPENAPI|FASTAPI_IMPORT>
  • <MAPPING_INPUT_PATH>
  • <GENERATE_MAPPING_REPORT:TRUE|FALSE>

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.
  1. Use this precedence order:
  • CLI flags
  • --config profile file
  • .codex/profiles/bootstrap-python-mcp-service/customization.yaml
  • ~/.config/gaelic-ghost/python-skills/bootstrap-python-mcp-service/customization.yaml
  • Script defaults
  1. If users want temporary reset behavior:
  • --bypassing-all-profiles
  • --bypassing-repo-profile
  • --deleting-repo-profile
  1. If users provide no customization or profile files, keep existing script defaults unchanged.
  2. See references/interactive-customization.md for schema and examples.

References

  • references/mcp-mapping-guidelines.md
  • references/fastmcp-docs-lookup.md
  • references/customization.md
  • references/interactive-customization.md

Script Inventory

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

Assets

  • assets/README.md.tmpl

Source Transparency

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