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 rules/nongjun/awesome-harness-engineering/pythongit clone --depth 1 https://github.com/nongjun/awesome-harness-engineeringWhat 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 | $0.00000 | $0.00527 |
| Opus 5 | $0.00000 | $0.00264 |
| Sonnet 5 | $0.00000 | $0.00105 |
| Haiku 4.5 | $0.00000 | $0.00053 |
Grade A, and why
Python编码风格 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.
What it actually says
Python 编码风格
本文件以 Python 特定内容扩展通用编码风格规则。
规范
- 遵循 PEP 8 规范
- 所有函数签名使用类型注解
不可变性
优先使用不可变数据结构：dataclass 配合 frozen=True，或 typing.NamedTuple，以减少共享可变状态带来的副作用与竞态。
格式化
- black 用于代码格式化
- isort 用于导入排序
- ruff 用于代码检查
安全
- 使用 bandit 做静态安全分析：
bandit -r . - 环境变量读取后校验非空，缺失时显式失败，不得静默继续
Pydantic Schema 继承
Update Schema 必须覆盖所有非 None 默认值字段：当 XxxUpdate 继承 XxxCreate 时，Create 中合理的默认值（gender="unknown"、source="manual"、tags=[]）在 Update 语境下变成隐蔽的数据覆盖——前端不传该字段时，Pydantic 解析为默认值而非 None，下游 if value is not None 判断失效，执行了不该执行的更新。
规则：XxxUpdate 中所有可部分更新的字段都声明为 Optional[T] = None，不依赖继承。
asyncio 对象生命周期
asyncio.Lock / httpx.AsyncClient 禁止模块级创建：这些对象绑定创建时的 event loop。APScheduler 等调度器在独立线程创建新 loop 时，跨 loop 使用会报错。
统一模式：_get_xxx() 函数追踪 id(asyncio.get_running_loop())，loop 变化时重建。
异步陷阱
禁止 await 调用同步函数：await sync_function() 不会报错但会阻塞 event loop，整个进程在该函数执行期间无法处理其他请求。同步数据库查询、文件 I/O 等耗时操作要么用 asyncio.to_thread() 包装，要么使用异步版本的库。
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 · 45 lines · 0 tokens per session scan A 8be61b8f4d9b
Python编码风格 is a cursor rule published in the GitHub repository nongjun/awesome-harness-engineering (2 stars, last pushed 5mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 527 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 2026-08-31.
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