# Crumb Explain

> Explain a Crumb transcript event kind (39+ kinds: qa.result, judge.score, step.judge, user.intervene, handoff.rollback, etc.). Returns category, emitter, parent chain, payload shape, source-of-truth (D1-D6), and wiki spec ref. Trigger on "judge.score 가 뭐야?", "qa.result 는 뭔가요?", "explain <kind>", "이 kind 어디 emit?", "what is the X kind", "어떤 actor 가 emit해?", or any schema-vocabulary question. Read-only. Do NOT trigger for general "what is Crumb" or status questions.

- Skill: `mangowhoiscloud/crumb-explain` (Agent Skill)
- Install (CLI): `npx skillmds@latest add mangowhoiscloud/crumb-explain`
- Raw SKILL.md: https://api.skillmd.com/api/skills/mangowhoiscloud/crumb-explain/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: mangowhoiscloud (https://skillmd.com/u/mangowhoiscloud)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/mangowhoiscloud/crumb-explain

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# /crumb-explain — 39 kind schema lookup

When the user asks about a transcript event kind:

**Preferred path** — call the `crumb_explain` MCP tool with `{kind: "<name>"}`.

**Fallback path** — `npx tsx src/index.ts explain "<kind>"`.

For partial matches (e.g., "user" → user.intervene / user.veto / ...), tool returns a did-you-mean list.

Explicit slash form: `/crumb-explain <kind>`.

Reference: `src/helpers/explain.ts` (KIND_REGISTRY), `protocol/schemas/message.schema.json`, v0.1 §3.3.