code-understand SKILL.md skillA
code-understand from ar9av/obsidian-wiki is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add ar9av/obsidian-wiki/code-understand@git:20261006.7f291a2Pins git:20261006.7f291a2 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- ar9av/obsidian-wiki
- Path
.skills/code-understand/SKILL.md- Versions recorded
- 3
- Latest version
- git:20261006.7f291a2, committed Oct 6, 2026
- First version recorded
- Aug 15, 2026
- Size
- 4,524 bytes
- Repository stars
- 3,599
- License
- MIT
Map the load-bearing files, symbols, callers, and dependencies of an unfamiliar codebase before making changes. Use for architecture orientation, impact analysis, what-would-break questions, or finding callers. Uses CodeGraph when available and a dependency-free builtin fallback.
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
# Code Understand — On-Demand Architecture Focus Map You are about to work in a codebase you don't fully know yet. Instead of grepping around or reading files at random, ask the local extractor for a **focus map**: the ranked symbols the architecture hangs on, each with a `file:line` citation and evidence type. Read only what it points at — this is a map, not a substitute for reading the actual code it cites. ## When to reach for this - Before editing an unfamiliar module — see what calls it and what it calls before changing its shape. - The user asks "how does X work", "what's the impact of changing Y", "who else uses this function" for a codebase, not the wiki. - You're about to do a large refactor and want a ranked list of load-bearing files instead of reading the whole tree. - You already have a diff or a set of changed files and want to know their blast radius before finishing the change. Not for: summarizing what a project *does* for the wiki (that's `wiki-update` Step 3b, which calls this same command as part of a bigger sync flow) — use this skill directly only when you need the focus map for your own immediate work, not to persist knowledge. ## Running it …
Read the whole file at its exact version.
How to install
mdr add ar9av/obsidian-wiki/code-understand@sha256:83e0031dee52562dThe line at the top of this page pins the label git:20261006.7f291a2, 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_snmzzxcbyialozpm)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Aug 15, 2026 and Oct 6, 2026, about one every 26 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261006.7f291a2 latest | 2026-10-06 | 7f291a2 | 4,524 B | A | view · diff |
| git:20260825.cba910a | 2026-08-25 | cba910a | 5,079 B | A | view · diff |
| git:20260815.fd30720 | 2026-08-15 | fd30720 | 5,056 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 (4524 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
ar9av/obsidian-wiki · 3,599 stars · license MIT · pushed 2026-10-21 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_snmzzxcbyialozpm GET https://markdownregistry.com/api/v1/resolve?ref=ar9av/obsidian-wiki/code-understand GET https://markdownregistry.com/api/v1/blob/83e0031dee52562dc9959f32f01ce3387684cedf4050bfb9d9cf11b59bfcce75
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.