llms.txt@publicA

This file is byte-identical to the first copy the registry indexed. Same content hash, so the same checks give both the same grade.

llms.txt@public from hudsonkit/arc is an llms.txt file: plain text a project publishes for AI models to read.

Install it, pinned
mdr add hudsonkit/arc/public/llms.txt@git:20261019.8bcf74e

Pins git:20261019.8bcf74e in mdr.lock. Pin the fingerprint instead.

Audit grade
A, 14 of 14 checks passed
Kind
llms.txt file
Repository
hudsonkit/arc
Path
public/llms.txt
Versions recorded
5
Latest version
git:20261019.8bcf74e, committed Oct 19, 2026
First version recorded
Aug 26, 2026
Size
1,594 bytes
Repository stars
13
License
MIT

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 (LLM Guide)

Arc is a visual editor for building architecture diagrams that stay in code.
Dense reference: docs/llm.txt · Contributor guide: CLAUDE.md

## Quickstart

```bash
bun install && bun run dev    # → http://localhost:5188/editor
```

## Packages

| Need | Package |
|------|---------|
| Render 2D diagram | `@hudsonkit/arc` or `@hudsonkit/arc-viewer` |
| Mermaid sequences | `@hudsonkit/arc-viewer` |
| Isometric | `@hudsonkit/arc-iso` |
| Full studio | This repo |

## Diagram schema (canonical)

`src/types/diagram.ts` — sizes are `xs` | `s` | `m` | `l` (not large/normal/small)

```json
{
  "layout": { "width": 700, "height": 300 },
  "nodes": { "api": { "x": 100, "y": 100, "size": "m" } },
  "nodeData": { "api": { "name": "API", "kind": "backend" } },
  "connectors": [{ "from": "a", "to": "b", "fromAnchor": "right", "toAnchor": "left", "style": "http" }],
  "connectorStyles": { "http": { "color": "amber", "strokeWidth": 2, "label": "HTTP" } }
}
```

## Agent docs

- docs/llm.txt — full briefing
- docs/agent/*.agent.md — packages, actions, MCP, verification
- skills/arc-diagrams/SKILL.md — diagram generation
- CLAUDE.md — editor contributor guide

## CLI + MCP
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint
mdr add hudsonkit/arc/public/llms.txt@sha256:ac3efa4197aa5de1

The line at the top of this page pins the label git:20261019.8bcf74e, 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.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_q5rz3eestpyqywbx.svg)](https://markdownregistry.com/a/art_q5rz3eestpyqywbx)

1 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 5 versions of this file, between Aug 26, 2026 and Oct 19, 2026, about one every 14 days.

versioncommittedcommitsizeaudit
git:20261019.8bcf74e latest2026-10-19 8bcf74e 1,594 BA view · diff
git:20260923.c89c6912026-09-23 c89c691 1,570 BA view · diff
git:20260922.b0d74942026-09-22 b0d7494 1,566 BA view · diff
git:20260921.b7318092026-09-21 b731809 1,468 BA view · diff
git:20260826.675d20f2026-08-26 675d20f 1,326 BA view

Audit of the latest version

A  14 of 14 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.
  • pass: Size between 200 bytes and 200 KB (1594 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

GitHub

hudsonkit/arc · 13 stars · license MIT · pushed 2026-10-20 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_q5rz3eestpyqywbx
GET https://markdownregistry.com/api/v1/resolve?ref=hudsonkit/arc/public/llms.txt
GET https://markdownregistry.com/api/v1/blob/ac3efa4197aa5de12e696d67fa4f5c2315b840787365a29dbafb09ead0df9808

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: how to add an llms.txt file to a website · which agent file does what.

More from hudsonkit/arc

CLAUDE.md CLAUDE.md file
hudsonkit/arc · CLAUDE.md
git:20261019.8bcf74e · audit A · 13 stars
AGENTS.md@docs AGENTS.md file
hudsonkit/arc · docs/AGENTS.md · Agent-friendly documentation for AI coding assistants
git:20261019.8bcf74e · audit B · 13 stars
arc-diagrams SKILL.md skill
hudsonkit/arc · skills/arc-diagrams/SKILL.md · Create and refine Arc diagrams and structured illustrations for products, processes, concepts, and software. Compose…
git:20261020.900725a · audit A · 13 stars
arc-host SKILL.md skill
hudsonkit/arc · skills/arc-host/SKILL.md · Operate the Arc exe.dev deployment — studio, MCP server, health checks, and redeploy. Use on arc-studio or arc-server…
git:20260922.b0d7494 · audit B · 13 stars
DESIGN.md@src/components/explainers DESIGN.md file
hudsonkit/arc · src/components/explainers/DESIGN.md · The implemented connection pool teaching surface, scoped to this directory.
git:20261012.dab855e · audit A · 13 stars
DESIGN.md@src/exploded DESIGN.md file
hudsonkit/arc · src/exploded/DESIGN.md · Implemented assembly geometry and showcase, scoped to the exploded feature.
git:20261020.900725a · audit A · 13 stars

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