A Python coding guide for Python 3.11 and newer that checks common style, type hints, naming, and documentation practices.

Use it to check PEP 8 style, modern type hints, Google-style docstrings, naming, imports, spacing, and related Python conventions.

It reduces inconsistent formatting and unclear type information when writing, reviewing, or refactoring Python code.

pep8 — Skill for Claude Code by hackermanishackerman

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add hackermanishackerman/claude-skills-vault --skill pep8

Clone the repo

git clone --depth 1 https://github.com/hackermanishackerman/claude-skills-vault

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/hackermanishackerman/claude-skills-vault/pep8/github.svg)](https://agentmods.dev/skills/hackermanishackerman/claude-skills-vault/pep8)

Your own site

<a href="https://agentmods.dev/skills/hackermanishackerman/claude-skills-vault/pep8"><img src="https://agentmods.dev/badge/skills/hackermanishackerman/claude-skills-vault/pep8/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/hackermanishackerman/claude-skills-vault/pep8"><img src="https://agentmods.dev/badge/skills/hackermanishackerman/claude-skills-vault/pep8.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 69 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,411 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00069	$0.02411
Opus 5.5	$0.00028	$0.00964
Sonnet 5.5	$0.00014	$0.00482
Haiku 4.5	$0.00007	$0.00241

Measured 2mo ago against content hash ea2bc1ddbf38, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

pep8 scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.

The scan reads SKILL.md. This mod also ships 4 executable files (scripts/check_pep8.sh, scripts/check_style.py, scripts/check_types.sh, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.claude/skills/pep8/SKILL.md · 388 lines

How it starts

The opening of the file, as written. The whole thing — 388 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Python Style & PEP 8 Enforcement

Auto-enforce Python 3.11+ standards.

When to Use

Writing/reviewing Python code
Type hint issues or style violations
User requests PEP 8 check

Core Standards

Standard	Desc
PEP 8	Naming, imports, spacing
PEP 484/585	Type hints (modern)
PEP 257	Docstrings
PEP 604	Union `\|`
PEP 570/3102	`/` positional, `*` keyword

Naming

class UserAccount: pass        # PascalCase
class HTTPClient: pass         # Acronyms: all caps
def calculate_total(): pass    # snake_case
async def fetch_data(): pass   # async same

user_name = "john"             # Variables: snake_case
MAX_RETRIES = 3                # Constants: SCREAMING_SNAKE

def _internal(): pass          # Private: underscore
__mangled = "hidden"           # Name mangling: double

T = TypeVar("T")               # TypeVars: PascalCase
UserT = TypeVar("UserT", bound="User")

Type Hints (3.11+)

Modern Syntax (Required)

# Built-in generics (NOT typing module)
def process(items: list[str]) -> dict[str, int]: ...

# Union w/ | (NOT Optional/Union)
def find_user(id: str) -> User | None: ...

# Self type
from typing import Self
class Builder:
    def chain(self) -> Self: return self

Patterns

from collections.abc import Callable, Awaitable
from typing import TypedDict, Literal, TypeAlias, ParamSpec, Generic

# Callable
Handler = Callable[[Request], Response]
AsyncHandler = Callable[[Request], Awaitable[Response]]

# TypedDict
class UserData(TypedDict):
    id: str
    email: Required[str]
    phone: NotRequired[str | None]

# Literal
Status = Literal["pending", "active", "disabled"]

# TypeAlias
JsonValue: TypeAlias = str | int | float | bool | None | list["JsonValue"] | dict[str, "JsonValue"]

# ParamSpec (decorators)
P = ParamSpec("P")
def logged(fn: Callable[P, T]) -> Callable[P, T]: ...

# Generic
class Repo(Generic[T]):
    def get(self, id: str) -> T | None: ...

Read the full file on GitHub · 388 lines

Files

What ships with it

4 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

2mo ago First seen · 388 lines · 69 tokens per session scan A ea2bc1ddbf38

Subscribe to this mod's changes

pep8 is a skill published in the GitHub repository hackermanishackerman/claude-skills-vault (2 stars, last pushed 25d ago), licensed MIT. It adds 69 tokens to every session and 2,411 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Claude Code Languages Python ai automation bun claude claude-commands

pep8 next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
pep8hackermanishackerman/claude-skills-vault	Skill	2	25d ago	MIT	A	69	Claude Code
biopythonsynthetic-sciences/openscience	Skill	4.4k	yesterday	Apache-2.0	A	76	Claude Code, Codex
night-market-build-and-envathola/claude-night-market	Skill	348	today	MIT	A	42	Claude Code
makefile-generationathola/claude-night-market	Skill	348	today	MIT	A	31	Claude Code
fastapi-senior-devgeorgekhananaev/claude-skills-vault	Skill	30	2mo ago	MIT	A	39	Claude Code
pydantic-modelgeorgekhananaev/claude-skills-vault	Skill	30	2mo ago	MIT	A	28	Claude Code
solid-pythonfusengine/codex	Skill	2	26d ago	none	A	38	Claude Code, Codex