# Teach

> Teach a subsystem or change so the reader can reason about it, combining how and why evidence. Use for real understanding rather than summary.

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

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# Teach

1. Run the substance of `how` and, when historical rationale matters, `why`.
2. Start with the smallest mental model that predicts behavior.
3. Add one layer at a time: actors/data, control flow, invariants, edge cases, then rationale/tradeoffs.
4. Use tiny diagrams and concrete examples that can be checked against the code.
5. End with a few prediction questions or "what would happen if" cases that test understanding, with answers only when useful.