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/juan294/cc-rpi/python-rulesnpx skills add juan294/cc-rpi --skill python-rulesgit clone --depth 1 https://github.com/juan294/cc-rpiWhat 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 | $0.00030 | $0.00347 |
| Opus 5 | $0.00015 | $0.00173 |
| Sonnet 5 | $0.00006 | $0.00069 |
| Haiku 4.5 | $0.00003 | $0.00035 |
Grade A, and why
python-rules 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 2d ago.
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.
What it actually says
Python Development
Virtual Environment Runner
Wrong -- bare python3 has no project dependencies:
python3 scripts/run_analysis.py
# ModuleNotFoundError: No module named 'pandas'
Right -- use the project's venv runner:
uv run python scripts/run_analysis.py
# Or: poetry run python scripts/run_analysis.py
# Or: pipenv run python scripts/run_analysis.py
Package-Relative Imports
Wrong -- direct execution breaks relative imports:
python scripts/etl/transform.py
# ModuleNotFoundError: No module named 'scripts.etl.utils'
Right -- use -m for scripts with package imports:
python -m scripts.etl.transform
Python Version for uv
Wrong -- uv auto-selects newest Python, packages lack wheels:
uv sync
# error: No wheel found for numpy on Python 3.14
Right -- specify a stable Python version:
# Check project requirements:
cat .python-version
# Pin the version:
uv sync --python 3.13
pip on macOS
Wrong -- system pip blocked by PEP 668 on macOS:
pip3 install httpie
# error: externally-managed-environment
Right -- use brew for CLI tools, pipx for Python apps:
brew install httpie
# Or for Python-specific apps:
pipx install httpie
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.
- 2d ago First seen · 74 lines · 30 tokens per session scan A 562d92b13b52
python-rules is a skill published in the GitHub repository juan294/cc-rpi (5 stars, last pushed 12d ago), licensed MIT. It adds 30 tokens to every session and 347 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.
Other skills, from other repositories
claude-md-review
Audit a CLAUDE.md file for the patterns that actually degrade Claude Code's output — vagueness, unnamed files, stale facts, and bloat. Use when asked to review, audit, improve, shrink, or fix a CLAUDE.md, and when a project's results feel inconsistent or Claude keeps rediscovering the same context.
best-practices
Searchable knowledge base of 152+ programming best practices across 30+ languages and frameworks. BM25-powered search over curated resources from industry leaders (Google, Airbnb, Uber, Mozilla, Shopify, OWASP).
common-session-retrospective
Analyze conversation corrections to detect skill gaps and prepare targeted skill-library maintenance tasks. Use after any session with user corrections, rework, or retrospective requests. After finding correction loops, also load +common/common-learning-log to persist mistake entries to AGENTSLEARNING.md.
common-workflow-writing
Rules for writing concise, token-efficient workflow and skill files. Prevents over-building that requires costly optimization passes. Use when creating or editing workflow files, SKILL.md files, or new skill definitions.
JavaScript Tooling
Development tools, linting, and testing for JavaScript projects.
common-ui-design
Design distinctive, production-grade frontend UI with bold aesthetic choices. Use when building web components, pages, interfaces, dashboards, or applications in any framework (React, Next.js, Angular, Vue, HTML/CSS).