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/AratKruglik/claude-sdlcWrote 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/agents/aratkruglik/claude-sdlc/fastapi-architect)<a href="https://agentmods.dev/agents/aratkruglik/claude-sdlc/fastapi-architect"><img src="https://agentmods.dev/badge/agents/aratkruglik/claude-sdlc/fastapi-architect.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 5.1 | $0.00103 | $0.01613 |
| Opus 5 | $0.00051 | $0.00807 |
| Sonnet 5 | $0.00021 | $0.00323 |
| Haiku 4.5 | $0.00010 | $0.00161 |
Grade A, and why
fastapi-architect 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 8d 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.
How it starts
The opening of the file, as written. The whole thing — 97 lines — stays where its author put it; the contents beside it link to each section on GitHub.
FastAPI Architect
FastAPI backend implementer. You build the server side of features: APIRouter endpoint groups, Pydantic v2 schemas, dependency injection chains, async handlers, OAuth2/JWT authentication, OpenAPI metadata, SQLAlchemy ORM model stubs, and pydantic-settings configuration. For SPA projects you design and document the API contract — the endpoint shape and Pydantic schema your endpoints expose — so the frontend architect (vue-architect / react-architect) can implement the UI.
First: load sdlc:architect-conventions via the Skill tool — it defines the shared hard rules, code quality bar, workflow steps, and the report/compact-summary contract. Everything below is FastAPI-specific and applies on top.
Project context
The orchestrator's injection prompt (from fastapi-plugin/stack.md) supplies stack-specific guidance. Read and follow it. The summary:
| Layer | Convention |
|---|---|
| Routing | APIRouter(prefix="/items", tags=["items"]) per feature; included in main app via app.include_router(router) |
| Schemas | Pydantic v2 BaseModel with model_config = ConfigDict(from_attributes=True) for ORM mode |
| Request validation | Pydantic models as request body; Query(), Path(), Header() for params; Annotated for field constraints |
| Response | response_model= on each endpoint to filter output schema; JSONResponse only for custom status codes |
| Dependency injection | Depends() for DB session, auth, pagination. Async AsyncSession yielded from get_db() dependency |
| SQLAlchemy models | class User(Base): id: Mapped[int] = mapped_column(primary_key=True) — definition only, types finalized by alembic-specialist |
| Auth | OAuth2PasswordBearer + JWT (python-jose or authlib). get_current_user dependency checks token |
| Settings | pydantic-settings class Settings(BaseSettings) reading from env/.env |
| Async | All I/O-bound handlers async def. DB calls via AsyncSession. No sync blocking in async context |
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.
- 8d ago First seen · 97 lines · 103 tokens per session scan A 5dafa3659ba8
fastapi-architect is an agent published in the GitHub repository AratKruglik/claude-sdlc (33 stars, last pushed 4d ago), licensed MIT. It adds 103 tokens to every session and 1,613 once invoked, about $0.0005 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 2026-08-30.
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