Minimizing Ty Ecosystem Changes
astral-sh/ruff
A skill your agent uses when a user says "minimize this ty ecosystem change", "reproduce this ecosystem result", "investigate a primer difference", "investigate a mypyprimer difference"…
Python coding best practices. An agent skill from Taoidle/plan-cascade.
Install Python Best Practices
$ npx skills add Taoidle/plan-cascade --skill python-best-practices -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install Taoidle/plan-cascade python-best-practices --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/Taoidle/plan-cascade.git skills-src && mkdir -p .claude/skills && cp -r skills-src/builtin-skills/python .claude/skills/python-best-practices && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "python-best-practices" agent skill from https://github.com/Taoidle/plan-cascade/tree/master/builtin-skills/python into .claude/skills/python-best-practices/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "python-best-practices", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/Taoidle/plan-cascade/tree/master/builtin-skills/pythonType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add Taoidle/plan-cascade --skill python-best-practices -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install Taoidle/plan-cascade python-best-practices --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Taoidle/plan-cascade.git skills-src && mkdir -p .agents/skills && cp -r skills-src/builtin-skills/python .agents/skills/python-best-practices && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "python-best-practices" agent skill from https://github.com/Taoidle/plan-cascade/tree/master/builtin-skills/python into .agents/skills/python-best-practices/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "python-best-practices", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add Taoidle/plan-cascade --skill python-best-practices -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install Taoidle/plan-cascade python-best-practices --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Taoidle/plan-cascade.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/builtin-skills/python .cursor/skills/python-best-practices && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "python-best-practices" agent skill from https://github.com/Taoidle/plan-cascade/tree/master/builtin-skills/python into .cursor/skills/python-best-practices/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "python-best-practices", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/Taoidle/plan-cascade.git --path builtin-skills/python--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add Taoidle/plan-cascade --skill python-best-practices -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install Taoidle/plan-cascade python-best-practices --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Taoidle/plan-cascade.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/builtin-skills/python .gemini/skills/python-best-practices && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "python-best-practices" agent skill from https://github.com/Taoidle/plan-cascade/tree/master/builtin-skills/python into .gemini/skills/python-best-practices/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "python-best-practices", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install Taoidle/plan-cascade python-best-practicesInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add Taoidle/plan-cascade --skill python-best-practices -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/Taoidle/plan-cascade.git skills-src && mkdir -p .github/skills && cp -r skills-src/builtin-skills/python .github/skills/python-best-practices && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "python-best-practices" agent skill from https://github.com/Taoidle/plan-cascade/tree/master/builtin-skills/python into .github/skills/python-best-practices/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "python-best-practices", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add Taoidle/plan-cascade --skill python-best-practices -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install Taoidle/plan-cascade python-best-practices --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Taoidle/plan-cascade.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/builtin-skills/python .opencode/skills/python-best-practices && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "python-best-practices" agent skill from https://github.com/Taoidle/plan-cascade/tree/master/builtin-skills/python into .opencode/skills/python-best-practices/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "python-best-practices", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
python-best-practices- GitHub stars
- 133
- Token cost
- ~463 tokens
- SKILL.md length
- 100 words
- Files
- 1
- Skills in repo
- 6
- Repo updated
- First seen
- Licence
- MIT
At a glance
Python coding best practices. An agent skill from Taoidle/plan-cascade.
- Reviewing Python code
- SKILL.md covers Code Style, Type Hints, Error Handling and Project Structure, plus 3 more sections
- Calls ruff
- Tasks that involve Type safety
What it does
Python Best Practices is an agent skill from Taoidle/plan-cascade. Python coding best practices. Use when writing or reviewing Python code. Covers type hints, error handling, and common patterns.
Its SKILL.md is about 460 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Development, covering Type safety and Linting and formatting. It works with Python and Ruff. The repository describes itself as: AI-powered cascading development framework. Decompose complex projects into parallel executable tasks with auto-generated PRDs, design docs, and multi-agent collaboration (Claude… The licence is MIT.
When your agent uses it
- Reviewing Python code
- Tasks that involve Type safety
- Tasks that involve Linting and formatting
Example prompts
- “/python-best-practices”
Requirements
- Python 3
What it can do on your machine
Read from SKILL.md and the folder at commit 5223f82. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
ruff
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Python Best Practices loads about 463 tokens when it runs. Until then it costs about 38 tokens; SKILL.md has 100 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from Taoidle/plan-cascade at commit 5223f82, republished under its MIT licence (© Taoidle). 100 words, ~463 tokens.
Download SKILL.mdSave it as
.claude/skills/python-best-practices/SKILL.md (or your agent's skills folder).- name
- python-best-practices
- description
- Python coding best practices. Use when writing or reviewing Python code. Covers type hints, error handling, and common patterns.
- license
- MIT
- metadata.author
- plan-cascade
- metadata.version
- 1.0.0
Python Best Practices
Code Style
| Rule | Guideline |
|---|---|
| Formatter | ruff format or black |
| Linter | ruff check with strict rules |
| Type hints | Always for public APIs |
| Docstrings | Google or NumPy style |
Type Hints
def process(items: list[str], max_count: int = 10) -> dict[str, int]: ...
def find_user(user_id: int) -> User | None: ...Error Handling
| Rule | Guideline |
|---|---|
| Specific exceptions | Never bare except: |
| Context managers | Use with for resources |
| Early return | Validate inputs, fail fast |
# Good
try:
result = process(data)
except ValidationError as e:
logger.warning(f"Validation failed: {e}")
return defaultProject Structure
src/package_name/
├── __init__.py
├── core/
└── py.typed
tests/
├── conftest.py
└── test_*.py
pyproject.tomlCommon Patterns
| Pattern | Usage |
|---|---|
@dataclass | Data containers |
@property | Computed attributes |
| Generators | Memory-efficient iteration |
functools.cache | Memoization |
Anti-Patterns
| Avoid | Use Instead |
|---|---|
| Mutable default args | None default, create inside |
import * | Explicit imports |
| Global state | Dependency injection |
# Bad: def add(item, items=[]): ...
# Good:
def add(item, items=None):
items = items or []
items.append(item)
return itemsTools
| Tool | Purpose |
|---|---|
pytest | Testing |
ruff | Linting + formatting |
mypy | Type checking |
uv | Dependencies |
© Taoidle, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in builtin-skills/python of Taoidle/plan-cascade.
Open the folder on GitHubat commit 5223f82
Compare with similar skills
Python Best Practices next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Python Best Practices this skillTaoidle/plan-cascade | 133 | — | ~463 | Automated safety check: Pass | MIT | |
| Minimizing Ty Ecosystem Changesastral-sh/ruff | 50k | — | ~4.6k | Automated safety check: Pass | MIT | |
| Kedro Babysitkedro-org/kedro | 11k | — | ~4k | Automated safety check: Pass | Custom licence | |
| Update Dependenciesalorence/django-modern-rpc | 111 | — | ~1.3k | Automated safety check: Pass | MIT | |
| Ha Code QualityFutureTense/keymaster | 349 | — | ~462 | Automated safety check: Pass | MIT | |
| Adk Stylegoogle/adk-python | 22k | — | ~769 | Automated safety check: Pass | Apache-2.0 |
Similar skills
- Official
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kedro-org/kedro
Run Kedro's local lint / format / type-check / tests on changed files (uses the project's pre-commit hooks, ruff, mypy, pytest, lint-imports, detect-secrets, Make targets — in the right venv), or…
Update Dependencies
alorence/django-modern-rpc
Routine update of all project dependencies — uv itself, uv.lock (all groups), tool versions pinned in GitHub workflows and .pre-commit-config.yaml (uv, ruff, mypy...), and SHA-pinned GitHub Actions.
Ha Code Quality
FutureTense/keymaster
Standards and commands for linting, code formatting, typing validation (Ruff, MyPy, Codespell, ESLint, Pre-commit/Prek, Tox), and adherence to Home Assistant Python 3.14 standards in Keymaster.
- Official
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Python style and codebase conventions for ADK (Agent Development Kit): private-by-default file visibility, imports, type hints, Pydantic v2 models, formatting, docstrings, logging, async I/O, file…
Cb Code Quality
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Circuit Breaker code conventions and the quality gates that actually block a push — ruff, mypy, eslint, the pytest coverage ratchet, and the make verify tiers.
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Related
Categories
Questions about Python Best Practices
What does Python Best Practices do?
Python coding best practices. An agent skill from Taoidle/plan-cascade. Python Best Practices is an agent skill from Taoidle/plan-cascade. Python coding best practices.
When should I use Python Best Practices?
Python Best Practices fits situations like: reviewing Python code; tasks that involve Type safety; tasks that involve Linting and formatting.
How do I install Python Best Practices in Claude Code?
Run `npx skills add Taoidle/plan-cascade --skill python-best-practices -a claude-code`. Or copy the skill folder (builtin-skills/python in Taoidle/plan-cascade) into .claude/skills/python-best-practices in your project. Claude Code loads it when a task matches its description.
How do I install Python Best Practices in Codex?
Run `npx skills add Taoidle/plan-cascade --skill python-best-practices -a codex`. Or copy the skill folder (builtin-skills/python in Taoidle/plan-cascade) into .agents/skills/python-best-practices in your project. Codex loads it when a task matches its description.
Can I use Python Best Practices in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add Taoidle/plan-cascade --skill python-best-practices -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/python-best-practices, .gemini/skills/python-best-practices, .github/skills/python-best-practices and .opencode/skills/python-best-practices in your project.
What does Python Best Practices need to run?
Going by SKILL.md and its folder, Python Best Practices needs the command-line tools its instructions call (ruff). Our summary lists: Python 3.
Does Python Best Practices access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Python Best Practices safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Python Best Practices use?
Python Best Practices is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Python Best Practices use?
About 463 tokens (SKILL.md is roughly 1.9k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Python Best Practices?
Skills that share tags, products or a category with Python Best Practices: Minimizing Ty Ecosystem Changes (astral-sh/ruff, 50k stars), Kedro Babysit (kedro-org/kedro, 11k stars), Update Dependencies (alorence/django-modern-rpc, 111 stars) and Ha Code Quality (FutureTense/keymaster, 349 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Python Best Practices?
Taoidle (a GitHub user) maintains it in Taoidle/plan-cascade, which has 133 GitHub stars. The repository holds 6 skills in this directory. The repository was last updated on March 14, 2026.
Source: Taoidle/plan-cascade on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.