explain-diff SKILL.md skillF
explain-diff from toongri/oh-my-toong-playground is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add toongri/oh-my-toong-playground/explain-diff@git:20261020.2c60ba9Pins git:20261020.2c60ba9 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- F, 16 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- toongri/oh-my-toong-playground
- Path
skills/explain-diff/SKILL.md- Versions recorded
- 15
- Latest version
- git:20261020.2c60ba9, committed Oct 20, 2026
- First version recorded
- Sep 3, 2026
- Size
- 58,381 bytes
- Repository stars
- 25
- License
- MIT
Use when someone must actually understand a code change before acting on it — reviewing an unfamiliar PR, onboarding onto a subsystem through its history, or handing a large agent-authored diff to a human. Triggers include "diff 설명", "PR 설명해줘", "이 변경 이해하고 싶어", "explain this change", "코드 변경 설명 문서", "변경 퀴즈".
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
<Role> # explain-diff **Core Principle**: The completion condition is a person, not a document. This skill turns a diff into teaching material and, at the end, measures whether the reader actually understood it with an open-ended quiz. It is not done until the reader passes. ## Overview Ten steps, passed in order. Steps 1–9 you do alone; the user does only two things — read the document and answer the quiz. **Purpose & perspective.** Write this document in the first person of the implementer explaining the change they made — the code they implemented and why — to a colleague or team-lead with no prior context on it. The bar: from this document alone, that reader richly and correctly understands what the change does, why it was made, and what they must be aware of when they next modify this code. Keep it clear and accessible — plain language, domain terms glossed on first use, big-picture diagrams (the ELI5 spirit of "explain it simply") — but never dumb it down or thin it out: accessible AND rich, never a thinned-out overview. (This does not relax the completion condition below — it is still not done until the reader passes the quiz.) ``` …
Read the whole file at its exact version.
How to install
mdr add toongri/oh-my-toong-playground/explain-diff@sha256:60979e0fc26a3073The line at the top of this page pins the label git:20261020.2c60ba9, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_3urqd3qk5inn5xu3)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 15 versions of this file, between Sep 3, 2026 and Oct 20, 2026, about one every 3 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261020.2c60ba9 latest | 2026-10-20 | 2c60ba9 | 58,381 B | F | view · diff |
| git:20261020.4526b62 | 2026-10-20 | 4526b62 | 58,521 B | F | view · diff |
| git:20261020.d21cc42 | 2026-10-20 | d21cc42 | 58,453 B | F | view · diff |
| git:20261020.a1ea38a | 2026-10-20 | a1ea38a | 58,444 B | F | view · diff |
| git:20261019.646e051 | 2026-10-19 | 646e051 | 58,374 B | F | view · diff |
| git:20260918.dba3f1f | 2026-09-18 | dba3f1f | 55,201 B | F | view · diff |
| git:20260916.fcd5045 | 2026-09-16 | fcd5045 | 55,207 B | F | view · diff |
| git:20260916.ebce537 | 2026-09-16 | ebce537 | 51,487 B | F | view · diff |
| git:20260916.ae69aad | 2026-09-16 | ae69aad | 55,102 B | F | view · diff |
| git:20260915.63ad2d1 | 2026-09-15 | 63ad2d1 | 54,604 B | F | view · diff |
| git:20260908.154b4b0 | 2026-09-08 | 154b4b0 | 48,729 B | F | view · diff |
| git:20260908.2ec781d | 2026-09-08 | 2ec781d | 46,952 B | F | view · diff |
| git:20260903.bf75a0d | 2026-09-03 | bf75a0d | 47,013 B | F | view · diff |
| git:20260903.d0885c1 | 2026-09-03 | d0885c1 | 46,624 B | F | view · diff |
| git:20260903.6b7f116 | 2026-09-03 | 6b7f116 | 46,275 B | F | view |
Audit of the latest version
- FAIL, critical: No zero-width or bidi control characters (matched: )
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (58381 bytes)
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Starting a new one? Use a template for SKILL.md on mdpantry, which passes every one of these checks and says what to change in it.
Source
toongri/oh-my-toong-playground · 25 stars · license MIT · pushed 2026-10-22 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_3urqd3qk5inn5xu3 GET https://markdownregistry.com/api/v1/resolve?ref=toongri/oh-my-toong-playground/explain-diff GET https://markdownregistry.com/api/v1/blob/60979e0fc26a307392e2b1e30d1b8d8b6382a081d923b6ce6248bfb5fc8e7dee
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
More from toongri/oh-my-toong-playground
Every file in toongri/oh-my-toong-playground