Canvas (macOS ilovasi)¶

macOS ilovasi WKWebView yordamida agent tomonidan boshqariladigan Canvas panelini joylashtiradi. U HTML/CSS/JS, A2UI va kichik interaktiv UI yuzalari uchun yengil vizual ish maydonidir.

Canvas qayerda joylashgan¶

Canvas holati Application Support ostida saqlanadi:

• ~/Library/Application Support/OpenClaw/canvas/<session>/...

Canvas paneli ushbu fayllarni maxsus URL sxemasi orqali taqdim etadi:

• openclaw-canvas://<session>/<path>

Misollar:

• openclaw-canvas://main/ → <canvasRoot>/main/index.html
• openclaw-canvas://main/assets/app.css → <canvasRoot>/main/assets/app.css
• openclaw-canvas://main/widgets/todo/ → <canvasRoot>/main/widgets/todo/index.html

Agar ildiz papkada index.html mavjud bo‘lmasa, ilova o‘rnatilgan andoza sahifani ko‘rsatadi.

Panel xatti-harakati¶

• Chegarasiz, o‘lchami o‘zgartiriladigan panel menyu paneli (yoki sichqoncha kursori) yoniga mahkamlanadi.
• Har bir sessiya uchun o‘lcham/joylashuvni eslab qoladi.
• Mahalliy canvas fayllari o‘zgarganda avtomatik qayta yuklanadi.
• Only one Canvas panel is visible at a time (session is switched as needed).

Canvas can be disabled from Settings → Allow Canvas. When disabled, canvas node commands return CANVAS_DISABLED.

Agent API surface¶

Canvas is exposed via the Gateway WebSocket, so the agent can:

• show/hide the panel
• navigate to a path or URL
• evaluate JavaScript
• capture a snapshot image

CLI examples:

openclaw nodes canvas present --node <id>
openclaw nodes canvas navigate --node <id> --url "/"
openclaw nodes canvas eval --node <id> --js "document.title"
openclaw nodes canvas snapshot --node <id>

Notes:

• canvas.navigate accepts local canvas paths, http(s) URLs, and file:// URLs.
• If you pass "/", the Canvas shows the local scaffold or index.html.

A2UI in Canvas¶

A2UI is hosted by the Gateway canvas host and rendered inside the Canvas panel. When the Gateway advertises a Canvas host, the macOS app auto‑navigates to the A2UI host page on first open.

Default A2UI host URL:

http://<gateway-host>:18793/__openclaw__/a2ui/

A2UI commands (v0.8)¶

Canvas currently accepts A2UI v0.8 server→client messages:

• beginRendering
• surfaceUpdate
• dataModelUpdate
• deleteSurface

createSurface (v0.9) is not supported.

CLI example:

cat > /tmp/a2ui-v0.8.jsonl <<'EOFA2'
{"surfaceUpdate":{"surfaceId":"main","components":[{"id":"root","component":{"Column":{"children":{"explicitList":["title","content"]}}}},{"id":"title","component":{"Text":{"text":{"literalString":"Canvas (A2UI v0.8)"},"usageHint":"h1"}}},{"id":"content","component":{"Text":{"text":{"literalString":"If you can read this, A2UI push works."},"usageHint":"body"}}}]}}
{"beginRendering":{"surfaceId":"main","root":"root"}}
EOFA2

openclaw nodes canvas a2ui push --jsonl /tmp/a2ui-v0.8.jsonl --node <id>

Quick smoke:

openclaw nodes canvas a2ui push --node <id> --text "Hello from A2UI"

Triggering agent runs from Canvas¶

Canvas can trigger new agent runs via deep links:

• openclaw://agent?...

Example (in JS):

window.location.href = "openclaw://agent?message=Review%20this%20design";

The app prompts for confirmation unless a valid key is provided.

Security notes¶

• Canvas scheme blocks directory traversal; files must live under the session root.
• Local Canvas content uses a custom scheme (no loopback server required).
• External http(s) URLs are allowed only when explicitly navigated.