feat: add managed skills gating

skills/clawdis-canvas/SKILL.md

@@ -0,0 +1,22 @@
+---
+name: clawdis-canvas
+description: Drive the Clawdis Canvas panel (present, eval, snapshot, A2UI) via the clawdis CLI.
+metadata: {"clawdis":{"always":true}}
+---
+
+# Clawdis Canvas
+
+Use Canvas to render HTML/JS or A2UI surfaces and capture snapshots.
+
+## Core commands
+
+- Show/hide: `clawdis canvas present [--node <id>] [--target <path>]`, `clawdis canvas hide`
+- JS eval: `clawdis canvas eval --js "..."`
+- Snapshot: `clawdis canvas snapshot`
+
+## A2UI
+
+- Push JSONL: `clawdis canvas a2ui push --jsonl /path/to/file.jsonl`
+- Reset: `clawdis canvas a2ui reset`
+
+If targeting remote nodes, use the canvas host (LAN/tailnet) and keep HTML under `~/clawd/canvas`.