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.
git clone --depth 1 https://github.com/beel-collab/presets.devWrote 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.
[](https://agentmods.dev/rules/beel-collab/presets.dev/python-rules)<a href="https://agentmods.dev/rules/beel-collab/presets.dev/python-rules"><img src="https://agentmods.dev/badge/rules/beel-collab/presets.dev/python-rules/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.
<a href="https://agentmods.dev/rules/beel-collab/presets.dev/python-rules"><img src="https://agentmods.dev/badge/rules/beel-collab/presets.dev/python-rules.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00000 | $0.01197 |
| Opus 5.5 | $0.00000 | $0.00479 |
| Sonnet 5.5 | $0.00000 | $0.00239 |
| Haiku 4.5 | $0.00000 | $0.00120 |
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 today.
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 — 113 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Python Rules for Cursor: Environments, Types and pytest
Install
Install the native export at .cursor/rules/python-rules.mdc.
Copy that export, not this catalog file. Catalog fields such as tools and author are for presets.dev.
Install one skill file per name. Cursor, GitHub Copilot, Codex, Antigravity CLI, and Devin can all read .agents/skills, so a second copy with the same name collides.
Python Rules for Cursor: Environments, Types and pytest
File-scoped Cursor rule for Python. It attaches when a matching file is in context.
Updated for uv 0.13.7 and Ruff 0.17.4, Nov 2026
Do not upgrade dependencies or the framework version unless the task asks.
Project shape
Read pyproject.toml and the lockfile first. The package layout is either a src/ tree or a flat package. Follow the one that exists. Tests live where the project already puts them, usually tests/.
Entry points, scripts, and the test command come from the project config. Run them with uv run when uv owns the project. Do not invent a virtualenv beside an existing .venv.
Types and boundaries
Type public functions and the data that crosses a process or a network. Prefer a typed model the project already uses, such as a dataclass or a Pydantic model, over a bare dict. Any is a hole. Use it only at a boundary you cannot name yet, and keep it off the return type.
Check optional values before you attribute them. A # type: ignore needs the error code and a reason. Do not blanket-ignore a file.
Errors and I/O
Raise a specific exception the caller can catch. Do not except Exception and then pass. Add context with raise ... from exc when you translate an error.
Async functions do not call time.sleep, requests, or other blocking I/O. Use the async client the project already has. A sync library stays in a thread only when the project already does that and the call is bounded.
Close files and HTTP responses. A with block is the default.
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.
- today First seen · 113 lines · 0 tokens per session scan A fcd95431913c
python-rules is a cursor rule published in the GitHub repository beel-collab/presets.dev (3 stars, last pushed yesterday), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 1,197 tokens. 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 2026-11-13.
python-rules compared with cursor rules from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| python-rulesbeel-collab/presets.dev | Cursor rule | 3 | yesterday | MIT | A | 0 | Cursor |
| ponytailDietrichGebert/ponytail | Cursor rule | 190k | 15d ago | MIT | A | 604 | Cursor |
| angular-20angular/angular | Cursor rule | 101k | today | MIT | A | 0 | Cursor |
| dev-standardapache/superset | Cursor rule | 76k | today | Apache-2.0 | A | 1,147 | Cursor |
| prefer-direct-imports-over-module-mocksprisma/orm | Cursor rule | 48k | today | Apache-2.0 | A | 0 | Cursor |
| config-validation-and-normalizationprisma/orm | Cursor rule | 48k | today | Apache-2.0 | A | 0 | Cursor |
| control-plane-descriptorsprisma/orm | Cursor rule | 48k | today | Apache-2.0 | A | 0 | Cursor |