python

A collection of Python-language engineering patterns that apply across Python projects, independent of frameworks such as Django or Flask.

In plain words
What is it for?
It helps split a large Python file into a package and turn environment configuration into immutable in-memory sets, along with similar standard-library tasks.
Why use it?
It keeps general Python solutions separate from framework-specific advice, making them easier to reuse in different projects.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/infohata/mind-vault/python
Any agent
npx skills add infohata/mind-vault --skill python
Clone the repo
git clone --depth 1 https://github.com/infohata/mind-vault

Made for: Claude Code, Codex.

Per session 37 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,175 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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.

ModelPer sessionOnce invoked
Fable 5 $0.00037 $0.01175
Opus 5 $0.00018 $0.00588
Sonnet 5 $0.00007 $0.00235
Haiku 4.5 $0.00004 $0.00118

Measured yesterday against content hash 0cb03654b998, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

python 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 yesterday.

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.

skills/python/SKILL.md · 62 lines

How it starts

The opening of the file, as written. The whole thing — 62 lines — stays where its author put it; the contents beside it link to each section on GitHub.

python

The vault's base Python-language layer — the deliberate home for engineering patterns that are true of any Python project, framework or not. It sits beneath the framework-stack skills (django, django-frontend, and future fastapi/flask/etc.): those skills own framework concepts (ORM, request lifecycle, background jobs, templating); this skill owns language-general mechanics that would otherwise misfile into whichever framework skill happened to need them first. New Python-general patterns land here — not under a framework skill by gravity. Framework skills point down into this layer's references rather than copying the recipes.

When to use

TRIGGER when: working a Python task whose mechanics are language-general — restructuring a large flat module into a package, parsing per-deployment config into immutable in-memory lookups, and similar stdlib-level engineering — and the recipe doesn't depend on a specific framework's runtime.

SKIP when: the task is framework-specific — defer to the repo's active framework-stack skill (django / django-frontend today; laravel and others once IDEA-014's stack detection lands). python is the broadest false-positive surface in the vault (almost everything touches a .py file); it must NOT fire on, or double-load alongside, a framework task. When framework context is present, the framework skill leads and reaches down into these references as needed — python does not also activate.

Pattern

1. Splitting a flat module into a package

Fires when a single large module (views.py, models.py, a multi-kLOC domain module) needs to become a package with per-domain submodules + a re-exporting __init__.py, and you want the move reviewable as a move (zero transcription risk), not a rewrite.

The shape: drive the extraction with Python's ast so each symbol is sliced byte-exact from the original; bucket by name-prefix into submodules; assert lossless line-coverage before writing; blank-line-only autopep8 + pyflakes import-trim so the diff stays a clean move. It also owns the RULE_rename-before-drop forced-atomic-member wrinkle (a module and a package can't share a dotted name). Full recipe, AST-omission edge cases, and the mixed-bridge sequencing are in references/MODULE_SPLIT_AST_EXTRACTION.md.

Read the full file on GitHub · 62 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.

  1. yesterday First seen · 62 lines · 37 tokens per session scan A 0cb03654b998

Subscribe to this mod's changes

python is a skill published in the GitHub repository infohata/mind-vault (2 stars, last pushed 4d ago), licensed Apache-2.0. It adds 37 tokens to every session and 1,175 once invoked, about $0.0002 per session on Opus 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.

Related

Other skills, from other repositories

systematic-debugging

Use when encountering any bug, test failure, or unexpected behavior, before proposing fixes.

obra/superpowers · 21 tokens

next-cache-components-adoption

Turn on Cache Components in a Next.js app and resolve the blocking routes it surfaces. Use when the user wants to enable, adopt, or migrate to Cache Components, flip the cacheComponents flag, work through a flood of blocking-prerender / instant validation errors, run the cache-components-instant-false codemod, or…

vercel/next.js · 95 tokens

babysit-pr

Babysit a GitHub pull request after creation by continuously polling review comments, CI checks/workflow runs, and mergeability state until the PR is merged/closed or user help is required. Diagnose failures, retry likely flaky failures up to 3 times, auto-fix/push branch-related issues when appropriate, and keep…

openai/codex · 114 tokens

imagegen

Generate or edit raster images when the task benefits from AI-created bitmap visuals such as photos, illustrations, textures, sprites, mockups, or transparent-background cutouts. Use when Codex should create a brand-new image, transform an existing image, or derive visual variants from references, and the output…

openai/codex · 113 tokens

cpu-profile-analysis

Analyze V8/Chrome CPU profiles (.cpuprofile) and DevTools trace files (Trace-.json). Use when: profiling performance, investigating slow functions, comparing code paths, finding bottlenecks, analyzing timeToRequest, understanding call trees from sampling profiler data, analyzing layout/paint/rendering, investigating…

microsoft/vscode · 71 tokens

next-cache-components-optimizer

Drive a Next.js route to instant navigation by setting up an agentic loop, under Cache Components / PPR, on initial load (hard navigation) and client-side navigation (soft navigation). Encode the goal as a failing @next/playwright instant() e2e and work it to green, one verified route at a time; the shipped test then…

vercel/next.js · 170 tokens