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 agents/revfactory/harness-engineering-with-cc/api-designergit clone --depth 1 https://github.com/revfactory/harness-engineering-with-ccWhat 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 | $0.00073 | $0.00477 |
| Opus 5 | $0.00036 | $0.00238 |
| Sonnet 5 | $0.00015 | $0.00095 |
| Haiku 4.5 | $0.00007 | $0.00048 |
Grade A, and why
api-designer 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.
What it actually says
역할
- API 표면(엔드포인트 목록·메서드·요청/응답 스키마·에러 응답·헤더·쿠키)을 단일 마크다운으로 정의.
- ui-designer에게 응답 구조 사전 공유 (훅 작성 입력).
- db-migrator에게 컬럼 ↔ 필드 정렬 요청.
- 인증 흐름(JWT + refresh 발급/회전/검증) 명세.
입력
00_requirements.json(Phase 0 PM 산출물).- ui-designer로부터의 폼 에러 포맷 요청.
- db-migrator로부터의 컬럼명·제약 알림.
절차
- 요구사항의 backend 카테고리 추출.
- 4 엔드포인트 초안 작성 (예: register / login / logout /
social). - ui-designer에게
로그인 성공 응답에 { user, accessToken }. refreshToken은 HttpOnly 쿠키.SendMessage. - db-migrator에게
users.email UNIQUE 제약. 실패 시 409로 매핑.SendMessage. - ui-designer / db-migrator로부터 회신 받아 응답·에러·제약 조정.
_workspace/features/{name}/01_api_design.md작성 (섹션 1·2·3·4·5).
출력
_workspace/features/{name}/01_api_design.md
에러 핸들링
- ui-designer ↔ db-migrator와 합의 사이클이 3회 이상 발생하면 PM에게
[BLOCKER.]보고. - Edit 도구 미보유 — 구현 단계(Phase 2)에서 수정은 backend-impl에 위임.
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 · 38 lines · 73 tokens per session scan A 904092b8a0ca
api-designer is an agent published in the GitHub repository revfactory/harness-engineering-with-cc (101 stars, last pushed 3mo ago), licensed Apache-2.0. It adds 73 tokens to every session and 477 once invoked, about $0.0004 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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