git:20260831.80517f1 to git:20260902.15fbea8

20 added, 83 removed. Audit A to A.

---

name: python-developer

description: Implement or fix small-to-medium Python features without full SDD (FastAPI/Flask, pytest). Use for isolated Python work or when invoking /python-developer.

---

## STOP - Read before ANY tool call

1. Read `{{GUARDRAILS_PATH}}`

2. Read `_shared/sdd-artifacts/SESSION.md`; load session-state for `$Cwd`

3. If the relevant gate is not approved: **STOP** - ask user **(pt-BR)** - do **NOT** Write/Shell

4. SDD/develop skills: after **ONE** step/task, **STOP** session - handoff only

5. This skill body is **English**; user-facing prompts may be **(pt-BR)**

### Step -1 - Gate check (report in chat before continuing)

```

Gate check:

[ ] guardrails.mdc read

[ ] SESSION.md read; session-state loaded

[ ] PIPELINE.md read (SDD skills only)

[ ] User confirmed current action (sim)

-> If any unchecked: STOP

```

---

+ # Skill: python-developer

## Trigger

Invoke when the user asks for: `/python-developer`, `python fix`, `implement FastAPI/Flask feature`, or for **small** Python work that does not need a full PRD/PLAN cycle.

## Outcome

Working **Python** code and tests in the open workspace: pytest (and project lint/type checks when configured) green, on a valid feature branch, with optional commit handoff. Supports **FastAPI** and **Flask** — not a FastAPI-only skill. Does not replace SDD for multi-step or cross-repo features.

- ## When to prefer SDD instead

- Recommend `/sdd-spec` -> `sdd-plan` -> `sdd-develop` if **two or more** apply:

- | Signal | Indicator |

- |--------|-----------|

- | Layers | 3+ packages/layers (API, services, persistence, workers) across many modules |

- | Database | New or altered schema / Alembic (or equivalent) migrations |

- | Repos | Backend and another repo or service |

- | Integrations | New messaging, external APIs, or consumers |

- | Size | 10+ files or estimated 4+ hours |

- | PLAN exists | User already has an approved PLAN - use `sdd-develop` |

## Lazy-load (only when needed)

| When | Path (after `scripts/sync-cursor.ps1`) |

|------|----------------------------------------|

| Repo context | `{{TOOLKIT_ROOT}}/skills/_shared/developer-common/step-0-context.md` |

| Before coding | `{{TOOLKIT_ROOT}}/skills/_shared/developer-common/step-0.5-review-guidelines.md` |

| Branching | `{{TOOLKIT_ROOT}}/rules/branch-validation.mdc`, `{{TOOLKIT_ROOT}}/skills/_shared/developer-common/step-3-branching.md` |

| Pre-commit | `{{TOOLKIT_ROOT}}/skills/_shared/developer-common/step-3.5-precommit-validation.md` |

| Commit / PR | `{{TOOLKIT_ROOT}}/skills/_shared/developer-common/step-4-commits-pr.md`, `{{TOOLKIT_ROOT}}/rules/conventional-commits.mdc` |

| Pre-PR gate | `{{TOOLKIT_ROOT}}/skills/_shared/developer-common/step-7-checklist.md` |

| FastAPI | `{{TOOLKIT_ROOT}}/skills/_shared/python-guidelines/fastapi.md` |

| Flask | `{{TOOLKIT_ROOT}}/skills/_shared/python-guidelines/flask.md` |

| Architecture (hub / structure) | `{{TOOLKIT_ROOT}}/skills/_shared/python-guidelines/architecture.md` |

| Architecture (greenfield / style unset) | `{{TOOLKIT_ROOT}}/skills/_shared/code-guidelines/principles/architecture-selection.md` — then **one** approved style only |

| pytest | `{{TOOLKIT_ROOT}}/skills/_shared/python-guidelines/pytest.md` |

| Packaging / pyproject | `{{TOOLKIT_ROOT}}/skills/_shared/python-guidelines/packaging-pyproject.md` |

| Typing | `{{TOOLKIT_ROOT}}/skills/_shared/python-guidelines/typing.md` |

| Async pitfalls | `{{TOOLKIT_ROOT}}/skills/_shared/python-guidelines/async-pitfalls.md` |

| Style / principles | `{{TOOLKIT_ROOT}}/skills/_shared/python-guidelines/google-style.md`, `{{TOOLKIT_ROOT}}/skills/_shared/python-guidelines/principles.md` |

| Subagent-first / SPAWN.md | `{{TOOLKIT_ROOT}}/skills/_shared/developer-common/subagent-first.md`, `{{TOOLKIT_ROOT}}/skills/_shared/agents/SPAWN.md` |

| Caveman Mode (if active) | `{{TOOLKIT_ROOT}}/skills/_shared/caveman/CAVEMAN.md` - **Full cap** |

| Context pressure | `{{TOOLKIT_ROOT}}/rules/context-management.mdc` |

+ | Reference index (routing only) | `{{TOOLKIT_ROOT}}/skills/python-developer/reference.md` |

+ | Process step detail (lazy) | `{{TOOLKIT_ROOT}}/skills/python-developer/references/<section>.md` |

Do **not** preload other stack guideline packs or corporate pipeline docs. Load only the `python-guidelines` rows needed for the current task (FastAPI **and/or** Flask **and** pytest as applicable). **MUST NOT** glob `architecture/**` — load hub + **one** principles style from ARCH/CONTINUITY (brownfield: discover-first if style omitted).

- **Never by default:** do not preload other stack guideline packs. Load only Python rows needed for the current task.

+ **Never by default:** do not preload all `references/*.md`. do not preload other stack guideline packs. Load only Python rows needed for the current task. Do not dump full stack guideline packs or memory-bank. Load **one** section per Process step (`SKILL-REFERENCE-RETRIEVAL.md`).

+ ## Reference routing

+ | Situation | Path |

+ |-----------|------|

+ | Scope / SDD escalation / design brief | `references/scope.md` |

+ | Implement flow | `references/execute-flow.md` |

+ | Must not (full) | `references/must-not.md` |

## Process

+ Read `references/<section>.md` for procedural detail — **not** full `reference.md`.

### Step -1b - Caveman Mode (Full cap)

1. Read `{{SDD_ROOT}}/preferences.json` (create `{ "caveman_mode": false, "caveman_level": "full" }` if missing).

2. If `caveman_mode` is false: continue without compression.

3. If true: load `{{TOOLKIT_ROOT}}/skills/_shared/caveman/CAVEMAN.md`; apply **Full** participation cap + prefs `caveman_level` (Lite skills never escalate); show once: `[Caveman] Modo ativo (respostas compactas, level={effective}). Digite caveman off para desativar.`

5. Auto-Clarity + never-compress gates/drafts/paths per `CAVEMAN.md`.

- ### Subagent-first (before implement)

- Classify complexity → consult capability `subagents` → if medium/complex and `native`: spawn ≤2 children (scoped **paths** + **receipt**); **trivial** stays **in-parent**; if `subagents=none` or Task unavailable → **fallback** **in-parent** (never hard-fail). Load `SPAWN.md` + `subagent-first.md`; do not paste guidelines into child prompts.

- ### 0. Workspace

- Confirm Python project (`pyproject.toml`, `requirements.txt`, `Pipfile`, `setup.py`, or `.py` layout). Read `AGENTS.md` / `README.md`. Detect FastAPI vs Flask from dependencies — keep **both** in scope; do not force FastAPI onto Flask apps. Summarize the user request and acceptance.

- ### 1. Guidelines (step 0.5)

- Follow `{{TOOLKIT_ROOT}}/skills/_shared/developer-common/step-0.5-review-guidelines.md`: load only the `python-guidelines` files needed for this task. Confirm test stack: **pytest** (`pytest.md`). Load `fastapi.md` and/or `flask.md` when those frameworks apply; keep `principles.md` / `google-style.md` for style when useful.

- ### 2. Branch (step 3)

- Baseline branch from user or repo default. Create/checkout `feature/<slug>` or `feat/<id>` - never commit on `main` / `master` / `develop`.

- ### 3. Plan micro-steps

- List 3-7 concrete tasks (files to touch, tests to add). Stay within one session when possible; checkpoint per `context-management.mdc` (>= 40% -> pause, offer `/commit`).

- ### 4. Implement

- Match existing project patterns (Glob/Read similar modules first). Use a virtual environment (`venv` or `uv`).

- | Layer | Typical work |

- |-------|----------------|

- | API | FastAPI routers / Flask Blueprints, schemas, validation |

- | Service | Application services, domain rules |

- | Persistence | Repositories, ORM models, migrations |

- | Integration | Clients, workers, messaging |

- Apply the matching `python-guidelines` docs while writing - do not paste full bodies into chat.

- ### 5. Tests

- Add or update tests for changed behavior. Prefer integration-style API tests when the project already uses them; unit tests for isolated logic. Default runner: **pytest**.

- ### 6. Build and test

- ```bash

- pytest

- ```

- Add lint/type steps if configured (`ruff`, `mypy`, etc.). Fix failures within scope. Ask before running the full suite if the repo is very large.

- ### 7. Pre-commit (step 3.5) and handoff

- Run `{{TOOLKIT_ROOT}}/skills/_shared/developer-common/step-3.5-precommit-validation.md` when appropriate. Offer `/commit` - do not commit automatically.

- Before push/PR, run `{{TOOLKIT_ROOT}}/skills/_shared/developer-common/step-7-checklist.md` and confirm FastAPI/Flask/pytest guidance used as needed.

- ### 8. SDD escalation

- If scope grows during work, stop and recommend:

+ ### 0. Scope

+ Follow `references/scope.md` (SDD escalation, design brief / host detection when present).

- ```

- /sdd-spec - [feature description]

- # then

- /sdd-plan - PRD/...

- # then

- /sdd-develop - PLAN/... - Step 1

- ```

+ ### 1. Execute

+ Follow `references/execute-flow.md` (subagent-first, workspace → guidelines → branch → implement → tests → handoff).

## Must not

- - Paste guideline packs into child prompts (pass scoped **paths** + require **receipt** only)

- - Spawn children for **trivial** work (keep **in-parent**)

- - Hard-fail when capability `subagents` is `none` or Task is unavailable (use **fallback** **in-parent**)

- - Treat the skill as FastAPI-only (Flask remains in scope)

- - Nested `feature/base/...` branches; commit on default integration branches

- - Speculative features outside stated acceptance (YAGNI)

- - Auto-commit or auto-PR without user request

- - Deprecated SDD skill aliases in handoff text - use `sdd-spec`, `sdd-plan`, `sdd-develop`, `commit` only

+ Enforce the full list in `references/must-not.md`. Critical: no guideline dumps into children; no auto-commit; lazy-load stack guidelines only — never dump full packs or memory-bank.

## Handoff

| Situation | Next |

|-----------|------|

| Commit | `/commit` |

| Review | `/code-review` |

| Large scope | `/sdd-spec` -> `sdd-plan` -> `sdd-develop` |

| Next PLAN step | New chat -> `/sdd-develop - PLAN/... - Step N` |