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/secondlifes/code-intel/fastapinpx skills add SecondLifes/code-intel --skill fastapigit clone --depth 1 https://github.com/SecondLifes/code-intelWhat 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 | $0.02500 |
| Opus 5 | $0.00028 | $0.01250 |
| Sonnet 5 | $0.00011 | $0.00500 |
| Haiku 4.5 | $0.00006 | $0.00250 |
Grade A, and why
fastapi 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.
This is a copy
95% identical to fastapi — 9 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.
How it starts
The opening of the file, as written. The whole thing — 331 lines — stays where its author put it; the contents beside it link to each section on GitHub.
FastAPI
Official FastAPI skill to write code with best practices, keeping up to date with new versions and features.
Usage
| You say | What happens |
|---|---|
| "Add a new endpoint for X" / "add a route to search_routes.py" | Consult this skill for the current Depends/response-model/streaming patterns before writing the route — keep it thin, delegate logic to src/services/*_svc.py per this repo's own convention. |
| "Add SSE/streaming to an endpoint" | Read references/streaming.md for the EventSourceResponse/yield pattern — matches /api/ask/stream and /api/research/stream's existing style. |
| "Add a dependency-injected client (Qdrant/Ollama)" | Read references/dependencies.md for Annotated[..., Depends(...)] — this repo's DIP convention for route handlers. |
| Ambiguous/no specific FastAPI question | Skim Quick Reference first; it links to the relevant references/*.md file by topic. |
Quick Reference
- Serve frontend apps: use
app.frontend()orrouter.frontend()for built frontend assets; see Serve Frontend Apps. - Server-Sent Events (SSE): use
response_class=EventSourceResponseandyield; see Streaming and the streaming reference. - JSON Lines and byte streaming: see the streaming reference.
- Dependencies: use
Annotated[..., Depends(...)]; see Dependency Injection and the dependency injection reference foryield, scopes, and class dependencies. - Response models: prefer return types; use
response_modelwhen the public response schema differs from the internal return value; see the response reference. - Pydantic models: do not use ellipsis or
RootModel; see the Pydantic reference. - Routing: declare router-level prefix, tags, and shared dependencies on the
APIRouter; see the path operation reference. - Tooling and related libraries: use uv, Ruff, ty, Asyncer, SQLModel, and HTTPX when applicable; see the other tools reference.
What ships with it
6 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.
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 · 331 lines · 57 tokens per session scan A 78fd5dc9b000
fastapi is a skill published in the GitHub repository SecondLifes/code-intel (2 stars, last pushed 21d ago), licensed Apache-2.0. It adds 57 tokens to every session and 2,500 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. It is 95% identical to fastapi, differing in 9 lines, and is treated as a copy.
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