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/dannykkh/skill-olympus/api-handoffnpx skills add Dannykkh/skill-olympus --skill api-handoffgit clone --depth 1 https://github.com/Dannykkh/skill-olympusWrote 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/dannykkh/skill-olympus/api-handoff)<a href="https://agentmods.dev/skills/dannykkh/skill-olympus/api-handoff"><img src="https://agentmods.dev/badge/skills/dannykkh/skill-olympus/api-handoff.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 | $0.00024 | $0.01092 |
| Opus 5 | $0.00012 | $0.00546 |
| Sonnet 5 | $0.00005 | $0.00218 |
| Haiku 4.5 | $0.00002 | $0.00109 |
Grade A, and why
api-handoff 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 4d 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 — 152 lines — stays where its author put it; the contents beside it link to each section on GitHub.
API Handoff
프론트엔드-백엔드 간 API 핸드오프 문서 생성. 양방향 지원.
모드 선택
| 모드 | 용도 | 트리거 |
|---|---|---|
| Backend → Frontend | API 완성 후 프론트 전달 | "create handoff", "document API", "frontend handoff" |
| Frontend → Backend | 데이터 요구사항 전달 | "backend requirements", "what data do I need" |
Mode 1: Backend → Frontend Handoff
No Chat Output: 핸드오프 문서만 생성. 설명 없음.
백엔드 개발 완료 후 프론트엔드에 전달하는 구조화된 문서 생성.
Workflow
- Collect context — feature, endpoints, DTOs, auth, edge cases 확인
- Create handoff file —
docs/ai/<feature-name>/api-handoff.md - Fill template — 모든 섹션 작성
- Double-check — 페이로드, auth, validation 검증
Output Template
# API Handoff: [Feature Name]
## Business Context
[2-4 sentences: 문제, 사용자, 중요성, 도메인 용어]
## Endpoints
### [METHOD] /path/to/endpoint
- **Purpose**: [1줄]
- **Auth**: [role/permission 또는 "public"]
- **Request**:
```json
{ "field": "type — description, constraints" }
- Response (success):
{ "field": "type — description" } - Response (error): [HTTP codes: 422, 404 등]
- Notes: [edge cases, rate limits, pagination]
Data Models / DTOs
[TypeScript interface 형식]
Enums & Constants
| Value | Meaning | Display Label |
|---|
Validation Rules
[프론트가 미러링할 검증 규칙]
Business Logic & Edge Cases
- [비자명한 동작, 제약조건]
Integration Notes
- Recommended flow: [fetch → select → submit → poll]
- Optimistic UI: [safe 여부]
- Caching: [cache headers]
Test Scenarios
- Happy path
- Validation error
- Not found
- Permission denied
---
## Mode 2: Frontend → Backend Requirements
> **No Chat Output**: 요구사항 문서만 생성.
프론트엔드가 백엔드에 데이터 요구사항을 전달.
### 핵심 원칙
| Frontend Owns | Backend Owns |
|---------------|--------------|
| 어떤 데이터 필요 | 데이터 구조 |
| 어떤 액션 존재 | 엔드포인트 설계 |
| UI 상태 처리 | 필드명, 타입 |
| 표시 요구사항 | 성능/캐싱 |
### Workflow
1. **Describe feature** — 화면, 사용자, 목표
2. **List data needs** — 표시할 데이터, 액션, 상태
3. **Surface uncertainties** — 모르는 비즈니스 규칙
4. **Leave room** — 백엔드 피드백 요청
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.
- 4d ago First seen · 152 lines · 24 tokens per session scan A 08b543842a55
api-handoff is a skill published in the GitHub repository Dannykkh/skill-olympus (5 stars, last pushed 3d ago), licensed MIT. It adds 24 tokens to every session and 1,092 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 2026-08-31.
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