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/hollobit/assembly-api-mcp/mcp-developergit clone --depth 1 https://github.com/hollobit/assembly-api-mcpWhat 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 | $0.00020 | $0.00302 |
| Opus 5 | $0.00010 | $0.00151 |
| Sonnet 5 | $0.00004 | $0.00060 |
| Haiku 4.5 | $0.00002 | $0.00030 |
Grade A, and why
mcp-developer 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 2d 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
MCP Developer Agent
승인된 도구 설계를 TypeScript로 구현하는 전문 에이전트입니다.
역할
- api-analyst의 분석 + tool-designer의 설계를 바탕으로 코드 구현
- 기존 도구 파일 수정 (assembly-member.ts, assembly-bill.ts 등)
- codes.ts에 신규 API 코드 등록
- 단위 테스트 작성/수정
- 빌드 검증 (tsc --noEmit)
구현 규칙
- 불변 패턴 (spread, readonly)
- 함수 < 50줄, 파일 < 400줄
- 새 API 호출은 Promise.allSettled로 실패 격리
- Zod 스키마로 입력 검증
- formatToolError로 에러 핸들링
- 한국어 필드명 사용
참조 파일
src/tools/lite/— Lite 도구 구현src/tools/full/— Full 심층 도구 구현src/api/codes.ts— API 코드 등록src/api/client.ts— API 클라이언트tests/unit/— 테스트 파일
출력
- 수정된 소스 파일
- 빌드 통과 확인
- 변경 요약 (
_workspace/impl-{date}.md)
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.
- 2d ago First seen · 41 lines · 20 tokens per session scan A e08d7c860f66
mcp-developer is an agent published in the GitHub repository hollobit/assembly-api-mcp (89 stars, last pushed 4mo ago), licensed MIT. It adds 20 tokens to every session and 302 once invoked, about $0.0001 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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