Add canvas artifact RPC foundation for A2UI

2026-02-16 12:36:02 -08:00
parent fe8674e108
commit 8a0b4f3dbb
11 changed files with 497 additions and 3 deletions
@@ -684,6 +684,44 @@ Return gateway protocol version, node policy status, and feature-gate snapshot.

 Return the operator-facing snapshot of registered node locations.

+### Canvas Methods
+
+#### `canvas.put`
+
+Upsert a session-scoped canvas artifact.
+
+**Request:**
+```json
+{
+  "id": 12,
+  "method": "canvas.put",
+  "params": {
+    "sessionId": "ws:abc123",
+    "artifactId": "summary-card",
+    "type": "note",
+    "title": "Draft Summary",
+    "content": { "markdown": "## Notes" },
+    "metadata": { "lane": "analysis" }
+  }
+}
+```
+
+#### `canvas.get`
+
+Fetch a single artifact by id.
+
+#### `canvas.list`
+
+List artifacts for a session (newest first).
+
+#### `canvas.delete`
+
+Delete a single artifact.
+
+#### `canvas.clear`
+
+Delete all artifacts for a session.
+
 #### `agent.setToolUseCallback`

 Set callback for tool use events (for confirmation UI).