canvas is agent-read markdown (skill) from trpc-group/trpc-agent-go.
Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.
What the file says
# Canvas Skill
Display HTML content on connected OpenClaw nodes (Mac app, iOS, Android).
## Overview
The canvas tool lets you present web content on any connected node's canvas view. Great for:
- Displaying games, visualizations, dashboards
- Showing generated HTML content
- Interactive demos
## How It Works
### Architecture
```
┌─────────────────┐ ┌──────────────────┐ ┌─────────────┐
│ Canvas Host │────▶│ Node Bridge │────▶│ Node App │
│ (HTTP Server) │ │ (TCP Server) │ │ (Mac/iOS/ │
│ Port 18793 │ │ Port 18790 │ │ Android) │
└─────────────────┘ └──────────────────┘ └─────────────┘
```
1. **Canvas Host Server**: Serves static HTML/CSS/JS files from `canvasHost.root` directory
2. **Node Bridge**: Communicates canvas URLs to connected nodes
3. **Node Apps**: Render the content in a WebView
### Tailscale Integration
The canvas host server binds based on `gateway.bind` setting:
| Bind Mode | Server Binds To | Canvas URL Uses |
| ---------- | ------------------- | -------------------------- |
| `loopback` | 127.0.0.1 | localhost (local only) |
…
Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.
GET https://markdownregistry.com/api/v1/artifacts/art_vylstwfavk6ken5j
GET https://markdownregistry.com/api/v1/resolve?ref=trpc-group/trpc-agent-go/canvas
GET https://markdownregistry.com/api/v1/blob/931e65501872f463e74ea38190d7fbdd029375b1a8a533d7b5ba891707eba918
Your agent 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.
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