diff-explainer SKILL.md skillA
diff-explainer from stevepolitodesign/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add stevepolitodesign/skills/diff-explainer@git:20261104.fc359acPins git:20261104.fc359ac in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- stevepolitodesign/skills
- Path
diff-explainer/SKILL.md- Versions recorded
- 7
- Latest version
- git:20261104.fc359ac, committed Nov 4, 2026
- First version recorded
- Aug 17, 2026
- Size
- 9,676 bytes
- Repository stars
- 10
- License
- none declared
Builds a shareable HTML walkthrough of the current changes, highlighting risks, tradeoffs, and alternatives considered.
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
# Diff explainer
The diff already shows what changed. What it can't show is why — why this approach
and not the obvious one, what broke when you tried that, what you're nervous about,
what you decided not to do. Supply that. Your reader is a sharp, time-poor developer
who may not know this stack.
## 1. Work out what you're explaining
No argument means the current branch against its base, diffed from the merge base
so other people's commits don't leak in.
```bash
BASE=$(git rev-parse --verify --quiet @{upstream} \
|| git rev-parse --verify --quiet refs/remotes/origin/HEAD \
|| git rev-parse --verify --quiet refs/heads/main \
|| git rev-parse --verify --quiet refs/heads/master)
MB=$(git merge-base "$BASE" HEAD)
test -n "$MB" || echo "No base found — ask which branch to diff against."
git diff --stat "$MB" && git log --oneline "$MB"..HEAD
git status --porcelain -uall # untracked files the diff won't show
```
Size up the change from the stat before reading `git diff "$MB"` — a diff you pull
into context whole is one you can no longer decide to skip. Upstream first, and
`refs/heads/` not bare `main`, or you diff against the wrong base: a fork of
…Read the whole file at its exact version.
How to install
mdr add stevepolitodesign/skills/diff-explainer@sha256:b88c033c8a115d52The line at the top of this page pins the label git:20261104.fc359ac, 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_ragu4ufhigopuqn3)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 7 versions of this file, between Aug 17, 2026 and Nov 4, 2026, about one every 13 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261104.fc359ac latest | 2026-11-04 | fc359ac | 9,676 B | A | view · diff |
| git:20261104.3fa0faf | 2026-11-04 | 3fa0faf | 8,784 B | A | view · diff |
| git:20261104.812e68b | 2026-11-04 | 812e68b | 9,496 B | A | view · diff |
| git:20260924.62cef2e | 2026-09-24 | 62cef2e | 9,418 B | A | view · diff |
| git:20260915.6a51426 | 2026-09-15 | 6a51426 | 7,761 B | A | view · diff |
| git:20260818.c4a4466 | 2026-08-18 | c4a4466 | 7,792 B | A | view · diff |
| git:20260817.f458aea | 2026-08-17 | f458aea | 6,371 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (9676 bytes)
- pass: No zero-width or bidi control characters
- 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
Source
stevepolitodesign/skills · 10 stars · license none declared · pushed 2026-11-05 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_ragu4ufhigopuqn3 GET https://markdownregistry.com/api/v1/resolve?ref=stevepolitodesign/skills/diff-explainer GET https://markdownregistry.com/api/v1/blob/b88c033c8a115d5281c855bbe248fa665ce62900e9e9777f568f9f36c1e57b36
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 stevepolitodesign/skills
Every file in stevepolitodesign/skills