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.
npx agentmods add skills/djrhails/dotfiles/python-conventionsnpx skills add DJRHails/dotfiles --skill python-conventionsgit clone --depth 1 https://github.com/DJRHails/dotfilesWhat 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 | $0.00057 | $0.03229 |
| Opus 5 | $0.00028 | $0.01614 |
| Sonnet 5 | $0.00011 | $0.00646 |
| Haiku 4.5 | $0.00006 | $0.00323 |
Grade A, and why
python-conventions 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.
How it starts
The opening of the file, as written. The whole thing — 246 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Python Conventions
Coding conventions and modern tooling for Python projects. Apply when writing or reviewing Python code, setting up new projects, or migrating from legacy tools. This file is the summary; worked examples and full configs live in references/.
Decision Tree
What are you doing?
|
+- Single-file script with dependencies?
| -> Use PEP 723 inline metadata (./references/pep723-scripts.md)
|
+- New multi-file project (not distributed)?
| -> Minimal uv setup (see Project Setup below)
|
+- New reusable package/library?
| -> Full project setup (see Project Setup below)
|
+- Migrating existing project?
| -> See Migration Guide below
|
+- Writing or reviewing code?
-> See conventions below
Toolchain
| Tool | Purpose | Replaces |
|---|---|---|
| uv | Package/dependency management | pip, virtualenv, pip-tools, pipx, pyenv |
| ruff | Linting and formatting | flake8, black, isort, pyupgrade, pydocstyle |
| ty | Type checking | mypy, pyright |
| pytest | Testing with coverage | unittest |
| prek | Pre-commit hooks | pre-commit (faster, Rust-native) |
uv_build |
Build backend | hatchling, setuptools |
| Loguru | Logging | stdlib logging |
Security Tools
shellcheck, detect-secrets, actionlint, zizmor (pre-commit); pip-audit and Dependabot for dependencies. Configuration: security-setup.md and dependabot.md.
Legacy Tool Migration
| Avoid | Use Instead |
|---|---|
pip install / pip freeze |
uv add / uv export |
python -m venv / source .venv/bin/activate |
uv sync / uv run <cmd> |
pipx install |
uv tool install |
requirements.txt |
pyproject.toml (projects) or PEP 723 (scripts) |
[project.optional-dependencies] for dev tools |
[dependency-groups] (PEP 735) |
[tool.ty] python-version |
[tool.ty.environment] python-version |
uv pip install |
uv add and uv sync |
| Poetry | uv |
| black / isort / flake8 / pylint | ruff |
| mypy / pyright | ty |
| pre-commit | prek |
| hatchling | uv_build |
What ships with it
12 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.
- references/code-style.md 4.5 KB
- references/dependabot.md 1.8 KB
- references/migration-checklist.md 4.1 KB
- references/pep723-scripts.md 5.0 KB
- references/prek.md 5.7 KB
- references/pyproject.md 5.9 KB
- references/ruff-config.md 6.0 KB
- references/security-setup.md 6.4 KB
- references/testing.md 5.0 KB
- references/uv-commands.md 4.8 KB
- templates/dependabot.yml 958 B
- templates/pre-commit-config.yaml 2.2 KB
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.
- yesterday First seen · 246 lines · 57 tokens per session scan A 1f084cee5852
python-conventions is a skill published in the GitHub repository DJRHails/dotfiles (2 stars, last pushed 7d ago), licensed MIT. It adds 57 tokens to every session and 3,229 once invoked, about $0.0003 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.
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