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Selig 4c966a3ad2 Initial commit: OpenClaw Skill Collection

6 custom skills (assign-task, dispatch-webhook, daily-briefing,
task-capture, qmd-brain, tts-voice) with technical documentation.
Compatible with Claude Code, OpenClaw, Codex CLI, and OpenCode.

2026-03-13 10:58:30 +08:00

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Canvas

Overview

The Canvas feature in OpenClaw is a lightweight visual workspace for HTML/CSS/JS, A2UI, and small interactive UI surfaces embedded in the macOS app using WKWebView.

Key Storage & Access

Canvas files are stored in ~/Library/Application Support/OpenClaw/canvas/<session>/ and served through a custom openclaw-canvas:// URL scheme that prevents directory traversal attacks.

Core Capabilities

The agent can control Canvas through several operations:

Display or hide the panel
Navigate to local paths or external URLs
Execute JavaScript commands
Generate snapshot images

A2UI Integration

The system supports A2UI v0.8 server-to-client messages including surfaceUpdate, dataModelUpdate, and deleteSurface. The newer createSurface (v0.9) remains unsupported.

Agent Triggering

Canvas content can initiate new agent runs using deep links formatted as openclaw://agent?message=<text>, with confirmation prompts unless a valid key is supplied.

Security Features

Canvas scheme blocks directory traversal; files must live under the session root. External URLs require explicit navigation permissions.

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