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/nongjun/awesome-harness-engineering/fastapinpx skills add nongjun/awesome-harness-engineering --skill fastapigit clone --depth 1 https://github.com/nongjun/awesome-harness-engineeringWrote 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/skills/nongjun/awesome-harness-engineering/fastapi)<a href="https://agentmods.dev/skills/nongjun/awesome-harness-engineering/fastapi"><img src="https://agentmods.dev/badge/skills/nongjun/awesome-harness-engineering/fastapi.svg" alt="Measured on agentmods" 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 | $0.00049 | $0.00510 |
| Opus 5 | $0.00024 | $0.00255 |
| Sonnet 5 | $0.00010 | $0.00102 |
| Haiku 4.5 | $0.00005 | $0.00051 |
Grade A, and why
FastAPI基础设施 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 3d 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.
This is a copy
97% identical to fastapi-common — 2 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
What it actually says
FastAPI 公共基础设施
模块一览
| 模块 | 导入路径 | 功能 |
|---|---|---|
| CORS | shared_backend.middleware.cors | 跨域配置（开发/生产自动切换） |
| 异常处理 | shared_backend.middleware.exception_handler | 统一错误格式 |
| 请求日志 | shared_backend.middleware.request_logging | 耗时记录、慢请求告警 |
| 响应格式 | shared_backend.middleware.response | 标准化 API 返回 |
统一响应格式
- 成功：{ code: 0, message: "success", data: ... }
- 错误：{ code: 错误码, message: "描述", data: null }
- 分页：{ code: 0, data: { list: [...], total, page, page_size } }
所有异常统一返回 HTTP 200，通过 code 字段区分错误类型。
关键函数
| 函数 | 用途 |
|---|---|
| setup_cors(app, app_env) | 配置 CORS（开发允许所有，生产限域名） |
| setup_exception_handlers(app) | 注册全局异常处理 |
| RequestLoggingMiddleware | 请求日志中间件（慢请求阈值 3s） |
| success_response() | 包装成功响应 |
| error_response() | 包装错误响应 |
| paginated_response() | 包装分页响应 |
| paginate_query() | SQLAlchemy 查询分页 |
| APIException | 自定义业务异常 |
| NotFoundException | 404 异常 |
SOP：新建后端模块
- 创建 FastAPI 应用
- 调用 setup_cors()、setup_exception_handlers()
- 添加 RequestLoggingMiddleware
- 路由中使用 success_response() / paginated_response() 返回数据
- 业务异常抛出 APIException
参考文件
- 公共模块/shared_backend/middleware/cors.py
- 公共模块/shared_backend/middleware/exception_handler.py
- 公共模块/shared_backend/middleware/request_logging.py
- 公共模块/shared_backend/middleware/response.py
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.
- 3d ago First seen · 53 lines · 49 tokens per session scan A 89db376b29df
FastAPI基础设施 is a skill published in the GitHub repository nongjun/awesome-harness-engineering (2 stars, last pushed 5mo ago), licensed MIT. It adds 49 tokens to every session and 510 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 97% identical to fastapi-common, differing in 2 lines, and is treated as a copy.
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