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Agent skill

Canvas

by openclaw in openclaw/openclaw

Present hosted widget documents on a connected macOS panel and control panel visibility or navigation.

MITAuto-check passed

Install Canvas

skills CLI
$ npx skills add openclaw/openclaw --skill canvas -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install openclaw/openclaw canvas --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/openclaw/openclaw.git skills-src && mkdir -p .claude/skills && cp -r skills-src/extensions/canvas/skills/canvas .claude/skills/canvas && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
canvas
GitHub stars
392k
Token cost
~263 tokens
SKILL.md length
116 words
Files
1
Skills in repo
93
Repo updated
First seen
Licence
MIT

At a glance

Present hosted widget documents on a connected macOS panel and control panel visibility or navigation.

  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Canvas is an agent skill from openclaw/openclaw. Present hosted widget documents on a connected macOS panel and control panel visibility or navigation.

Its SKILL.md is about 260 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It works with macOS. The repository describes itself as: The AI that really does things. Any OS. Any Platform. The lobster way. 🦞. The licence is MIT.

Example prompts

  • “/canvas”

What it can do on your machine

Read from SKILL.md and the folder at commit 1eb5970. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Canvas loads about 263 tokens when it runs. Until then it costs about 27 tokens; SKILL.md has 116 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~27
When it runs · the whole SKILL.md, loaded when a task matches
~263

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from openclaw/openclaw at commit 1eb5970, republished under its MIT licence (© openclaw). 116 words, ~263 tokens.

Download SKILL.mdSave it as .claude/skills/canvas/SKILL.md (or your agent's skills folder).
name
canvas
description
Present hosted widget documents on a connected macOS panel and control panel visibility or navigation.

Widget panel

Use show_widget with presentation.target: "node_panel" to create a hosted widget document and present it on an eligible connected Mac. This is the normal agent path.

The Canvas tool is limited to direct panel control:

  • present: show the panel, optionally with a hosted document path or local app scheme.
  • hide: hide the panel.
  • navigate: navigate the visible panel to a hosted document path or local app scheme.

Do not invent local file paths or arbitrary external URLs. Hosted documents use the capability-scoped /__openclaw__/canvas/documents/... route returned by show_widget. A2UI content renders on session boards and loads renderer assets from /__openclaw__/a2ui.

If plugins.entries.canvas.config.host.enabled is false, hosted widget documents, A2UI renderer assets, and node-panel presentation are disabled together.

© openclaw, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in extensions/canvas/skills/canvas of openclaw/openclaw.

Open the folder on GitHubat commit 1eb5970

Compare with similar skills

Canvas next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Canvas compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Canvas this skillopenclaw/openclaw392k—~263Automated safety check: PassMIT
Site ArchitectureAvdLee/RocketSimApp80311 repos~3.3kAutomated safety check: PassCustom licence
Engine Whats Newflutter/flutter179k—~978Automated safety check: PassBSD-3-Clause
macOS Spm App PackagingDimillian/Skills4k5 repos~1.2kAutomated safety check: PassMIT
Orca iOS Simulator Controlstablyai/orca87k1 repos~584Automated safety check: PassApache-2.0
Mole Bug Patternstw93/Mole70k—~2kAutomated safety check: PassGPL-3.0

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    AvdLee/RocketSimApp

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    803 GitHub starsUsed in 11 repos~3.3k tokens
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  • Engine Whats New

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    Generates the "what's new" release summary and diff file for changes in the Flutter engine (//engine/src/flutter) between two releases (e.g., 3.47 vs 3.44).

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  • Browser Automation

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Works with

Questions about Canvas

What does Canvas do?

Present hosted widget documents on a connected macOS panel and control panel visibility or navigation. Canvas is an agent skill from openclaw/openclaw. Present hosted widget documents on a connected macOS panel and control panel visibility or navigation.

How do I install Canvas in Claude Code?

Run `npx skills add openclaw/openclaw --skill canvas -a claude-code`. Or copy the skill folder (extensions/canvas/skills/canvas in openclaw/openclaw) into .claude/skills/canvas in your project. Claude Code loads it when a task matches its description.

How do I install Canvas in Codex?

Run `npx skills add openclaw/openclaw --skill canvas -a codex`. Or copy the skill folder (extensions/canvas/skills/canvas in openclaw/openclaw) into .agents/skills/canvas in your project. Codex loads it when a task matches its description.

Can I use Canvas in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add openclaw/openclaw --skill canvas -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/canvas, .gemini/skills/canvas, .github/skills/canvas and .opencode/skills/canvas in your project.

What does Canvas need to run?

SKILL.md names no scripts, command-line tools or credentials: Canvas is instructions for the agent only.

Does Canvas access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Canvas safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Canvas use?

Canvas is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Canvas use?

About 263 tokens (SKILL.md is roughly 1.1k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Canvas?

Skills that share tags, products or a category with Canvas: Site Architecture (AvdLee/RocketSimApp, 803 stars), Engine Whats New (flutter/flutter, 179k stars), macOS Spm App Packaging (Dimillian/Skills, 4k stars) and Orca iOS Simulator Control (stablyai/orca, 87k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Canvas?

openclaw (a GitHub organization) maintains it in openclaw/openclaw, which has 391,610 GitHub stars. The repository holds 93 skills in this directory. The repository was last updated on October 8, 2026.

Source: openclaw/openclaw on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.