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Python Backend | Skills Pool

스킬 파일

Python Backend

Implement backend changes in Python codebases (especially FastAPI/service-layer projects) with clear route/service/domain boundaries and pytest coverage. Use only for backend-focused tasks where Python application code is in scope.

marcocello0 스타2026. 3. 8.

직업
카테고리: Backend

스킬 내용

Scope

Applies when:
- The feature affects backend logic
- Python project detected (pyproject.toml / requirements.txt)
- FastAPI / service-layer architecture is in use

Architecture expectations

routes -> services/use-cases -> domain -> infra/data
No cyclic imports
No “god” services
Keep business logic out of routes

Implementation rules

Application code must be located in app/ folder
requirements.txt must be located in app/ folder
Reuse existing patterns before creating new modules
Follow existing naming and folder structure exactly
Smallest change that satisfies the feature
Avoid backward compatibility work by default; do it only when explicitly requested

Tests (required)

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Python Backend

npx skillvault add marcocello/marcocello-dot-codex-skills-python-backend-skill-md

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작성자: marcocello
스타: 0
업데이트: 2026. 3. 8.
직업

이 페이지의 내용

Add/extend repo tests (pytest) so that:
- Red phase: at least one relevant test fails before implementation
- Green phase: the same test passes after the code change
- New behavior is covered
Tests must contain real assertions
Do not weaken or delete existing tests

Acceptance harness

If FEATURE_DIR/acceptance/ is missing:
- Create FEATURE_DIR/acceptance/tests/
- Use FastAPI TestClient
- Write black-box tests hitting actual endpoints
Translate behavior described in FEATURE.md into executable checks

Virtualenv policy

If Python is detected:
- .venv/ at repo root is required
- Never delete .venv
- Prefer incremental repair
- If available, use $HOME/.codex/scripts/ensure_venv
All Python tools must be run via .venv/bin/python -m <tool>

Reference repos (Python backend)

Use only if current repo lacks a needed pattern.

$HOME/software/marcocello/meshify-backend
- FastAPI service layout
- pytest fixtures style
- ruff config conventions

When using a reference repo:

Borrow patterns, not whole implementations.
Mention repo + pattern reused (1 line).

Architecture expectations

03Implementation rules

04Tests (required)

05Acceptance harness

06Virtualenv policy

07Reference repos (Python backend)

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