arc-diagrams SKILL.md skillA
arc-diagrams from arach/arc is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add arach/arc/arc-diagrams@git:20261020.900725aPins git:20261020.900725a in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- arach/arc
- Path
skills/arc-diagrams/SKILL.md- Versions recorded
- 7
- Latest version
- git:20261020.900725a, committed Oct 20, 2026
- First version recorded
- Jan 20, 2026
- Size
- 6,914 bytes
- Repository stars
- 13
- License
- MIT
Create and refine Arc diagrams and structured illustrations for products, processes, concepts, and software. Compose architecture maps, request paths, layered cutaways, panel cubes, comparisons, and visual explanations with editable source and a render-and-review loop.
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
# Arc diagrams and illustrations Make the reader understand a product, process, system, or relationship. Deliver an editable source and a rendered visual whose labels survive the intended display size. Arc can carry a technical illustration beyond a boxes-and-arrows inventory; choose the representation from the explanation. ## Establish the explanation Infer the audience, destination, and one question the image must answer from the request. Ask only when a missing fact would change the result. For example: “Where does a request wait when all connections are busy?” is a useful brief. “Show everything in the backend” needs a selected path or several views. For a real system, inspect its code or supplied evidence before drawing ownership, direction, timing, or trust boundaries. Label hypothetical examples as illustrative. Keep measurements and scale honest; do not invent throughput, latency, or capacity. ## Select the representation - **Architecture, boundaries, request paths, comparisons:** Arc architecture JSON (`ArcDiagramData`). Read [diagram authoring](references/diagram-authoring.md). - **Layers, physical containment, spatial hierarchy:** tiered isometric …
Read the whole file at its exact version.
How to install
mdr add arach/arc/arc-diagrams@sha256:086dfcc2ae3ffa40The line at the top of this page pins the label git:20261020.900725a, 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_542ud7n72tps3mro)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 7 versions of this file, between Jan 20, 2026 and Oct 20, 2026, about one every 45 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261020.900725a latest | 2026-10-20 | 900725a | 6,914 B | A | view · diff |
| git:20261019.8bcf74e | 2026-10-19 | 8bcf74e | 12,092 B | A | view · diff |
| git:20260926.61cad42 | 2026-09-26 | 61cad42 | 12,088 B | A | view · diff |
| git:20260922.b0d7494 | 2026-09-22 | b0d7494 | 10,309 B | A | view · diff |
| git:20260920.4d0ec25 | 2026-09-20 | 4d0ec25 | 7,584 B | A | view · diff |
| git:20260826.a296511 | 2026-08-26 | a296511 | 6,341 B | A | view · diff |
| git:20260120.41489ca | 2026-01-20 | 41489ca | 5,833 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 (6914 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
arach/arc · 13 stars · license MIT · pushed 2026-10-20 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_542ud7n72tps3mro GET https://markdownregistry.com/api/v1/resolve?ref=arach/arc/arc-diagrams GET https://markdownregistry.com/api/v1/blob/086dfcc2ae3ffa407c368d225cf7e5aa7ebd32b2a59c123ed1325021e189a985
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.