diff --git a/CHANGELOG.md b/CHANGELOG.md
index 52f331b14..f6d793cee 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -31,7 +31,7 @@ First Clawdis release post rebrand. This is a semver-major because we dropped le
 
 ### iOS node (Iris)
 - New iOS companion app that pairs to the Gateway bridge, reports presence as a node, and exposes a WKWebView “Canvas” for agent-driven UI.
-- `clawdis nodes invoke` supports `screen.eval` and `screen.snapshot` to drive and verify the iOS Canvas (fails fast when Iris is backgrounded).
+- `clawdis nodes invoke` supports `canvas.eval` and `canvas.snapshot` to drive and verify the iOS Canvas (fails fast when Iris is backgrounded).
 - Voice wake words are configurable in-app; Iris reconnects to the last bridge when credentials are still present in Keychain.
 
 ### WhatsApp & agent experience
diff --git a/README.md b/README.md
index 98546183a..76f1dc597 100644
--- a/README.md
+++ b/README.md
@@ -123,7 +123,7 @@ Build/run the mac app with `./scripts/restart-mac.sh` (packages, installs, and l
 Iris is an internal/prototype iOS app that connects as a **remote node**:
 
 - **Voice trigger:** forwards transcripts into the Gateway (agent runs + wakeups).
-- **Canvas screen:** a WKWebView + `<canvas>` surface the agent can control (via `screen.eval` / `screen.snapshot` over `node.invoke`).
+- **Canvas screen:** a WKWebView + `<canvas>` surface the agent can control (via `canvas.eval` / `canvas.snapshot` over `node.invoke`).
 - **Discovery + pairing:** finds the bridge via Bonjour (`_clawdis-bridge._tcp`) and uses Gateway-owned pairing (`clawdis nodes pending|approve`); `clawdis nodes status` shows paired nodes + capabilities.
 
 Runbook: `docs/ios/connect.md`
diff --git a/docs/android/connect.md b/docs/android/connect.md
index fde107f4a..7affd49a8 100644
--- a/docs/android/connect.md
+++ b/docs/android/connect.md
@@ -102,7 +102,7 @@ The Android node’s Chat sheet uses the gateway’s **primary session key** (`m
 ## 7) Canvas + camera
 
 Canvas commands (foreground only):
-- `screen.eval`, `screen.snapshot`, `screen.navigate`, `screen.setMode`
+- `canvas.eval`, `canvas.snapshot`, `canvas.navigate`, `canvas.setMode`
 
 Camera commands (foreground only; permission-gated):
 - `camera.snap` (jpg)
diff --git a/docs/ios/connect.md b/docs/ios/connect.md
index 575e162fd..0f3f30c01 100644
--- a/docs/ios/connect.md
+++ b/docs/ios/connect.md
@@ -122,19 +122,19 @@ Iris runs a WKWebView “Canvas” scaffold which exposes:
 - `window.__clawdis.ctx` (2D context)
 - `window.__clawdis.setStatus(title, subtitle)`
 
-### Draw with `screen.eval`
+### Draw with `canvas.eval`
 
 ```bash
-clawdis nodes invoke --node "iOS Node" --command screen.eval --params "$(cat <<'JSON'
+clawdis nodes invoke --node "iOS Node" --command canvas.eval --params "$(cat <<'JSON'
 {"javaScript":"(() => { const {ctx,setStatus} = window.__clawdis; setStatus('Drawing','…'); ctx.clearRect(0,0,innerWidth,innerHeight); ctx.lineWidth=6; ctx.strokeStyle='#ff2d55'; ctx.beginPath(); ctx.moveTo(40,40); ctx.lineTo(innerWidth-40, innerHeight-40); ctx.stroke(); setStatus(null,null); return 'ok'; })()"}
 JSON
 )"
 ```
 
-### Snapshot with `screen.snapshot`
+### Snapshot with `canvas.snapshot`
 
 ```bash
-clawdis nodes invoke --node 192.168.0.88 --command screen.snapshot --params '{"maxWidth":900}'
+clawdis nodes invoke --node 192.168.0.88 --command canvas.snapshot --params '{"maxWidth":900}'
 ```
 
 The response includes `base64` PNG data (for debugging/verification).
diff --git a/docs/ios/spec.md b/docs/ios/spec.md
index 936f390d0..c8a1ae741 100644
--- a/docs/ios/spec.md
+++ b/docs/ios/spec.md
@@ -117,14 +117,11 @@ Add to `src/gateway/protocol/schema.ts` (and regenerate Swift models):
 
 ### Node command set (screen-focused)
 These are values for `node.invoke.command`:
-- `screen.show` / `screen.hide`
-- `screen.navigate` with `{ url }` (Canvas URL or https URL)
-- `screen.eval` with `{ javaScript }`
-- `screen.snapshot` with `{ maxWidth?, quality?, format? }`
-- `screen.setMode` with `{ mode: "canvas" | "web" }`
-
-Alias:
-- `canvas.*` is accepted as a synonym for `screen.*` (e.g. `canvas.eval` → `screen.eval`).
+- `canvas.show` / `canvas.hide`
+- `canvas.navigate` with `{ url }` (Canvas URL or https URL)
+- `canvas.eval` with `{ javaScript }`
+- `canvas.snapshot` with `{ maxWidth?, quality?, format? }`
+- `canvas.setMode` with `{ mode: "canvas" | "web" }`
 
 Result pattern:
 - Request is a standard `req/res` with `ok` / `error`.
@@ -135,13 +132,13 @@ As of 2025-12-13, the Gateway supports `node.invoke` for bridge-connected nodes.
 
 Example: draw a diagonal line on the iOS Canvas:
 ```bash
-clawdis nodes invoke --node ios-node --command screen.eval --params '{"javaScript":"(() => { const {ctx} = window.__clawdis; ctx.clearRect(0,0,innerWidth,innerHeight); ctx.lineWidth=6; ctx.strokeStyle=\"#ff2d55\"; ctx.beginPath(); ctx.moveTo(40,40); ctx.lineTo(innerWidth-40, innerHeight-40); ctx.stroke(); return \"ok\"; })()"}'
+clawdis nodes invoke --node ios-node --command canvas.eval --params '{"javaScript":"(() => { const {ctx} = window.__clawdis; ctx.clearRect(0,0,innerWidth,innerHeight); ctx.lineWidth=6; ctx.strokeStyle=\"#ff2d55\"; ctx.beginPath(); ctx.moveTo(40,40); ctx.lineTo(innerWidth-40, innerHeight-40); ctx.stroke(); return \"ok\"; })()"}'
 ```
 
 ### Background behavior requirement
 When iOS is backgrounded:
 - Voice may still be active (subject to iOS suspension).
-- **All `screen.*` commands must fail** with a stable error code, e.g.:
+- **All `canvas.*` commands must fail** with a stable error code, e.g.:
   - `NODE_BACKGROUND_UNAVAILABLE`
   - Include `retryable: true` and `retryAfterMs` if we want the agent to wait.
 
@@ -222,8 +219,8 @@ open Clawdis.xcodeproj
    - Implement bridge routing + ACLs
 4) **iOS screen/canvas**
    - WKWebView screen surface
-   - `screen.navigate/eval/snapshot`
-   - Background fast-fail for `screen.*`
+   - `canvas.navigate/eval/snapshot`
+   - Background fast-fail for `canvas.*`
 5) **Unify mac Canvas under the same node.invoke**
    - Keep existing implementation, but expose it through the unified protocol path so the agent uses one API.