diff --git a/docs/BUILD.md b/docs/BUILD.md
index 67953a7..0d02ee2 100644
--- a/docs/BUILD.md
+++ b/docs/BUILD.md
@@ -72,14 +72,24 @@ xcrun devicectl device process launch \
 
 ## 5. Pair the iOS app with the sidecar
 
-Run on Mac (sidecar must be running):
+Run on Mac (sidecar must be running), with the token from step 1:
 ```bash
-node /Users/jay/.pi/agent/git/git.vpsj.de/jay/pi-remote-control/extensions/remote-control/cli/index.js pair
+# Get the token from the sidecar URL, then:
+curl -s "http://<SIDECAR_URL>/pair-qr?token=<TOKEN>"
+```
+
+Or one-liner (reads token from tmux pane automatically):
+```bash
+TOKEN=$(tmux capture-pane -t pi-sidecar -p | grep -o 'token=[^ ]*' | head -1 | cut -d= -f2) && \
+SIDECAR=$(tmux capture-pane -t pi-sidecar -p | grep -o 'http://[^ ]*' | head -1 | sed 's/?.*//') && \
+curl -s "$SIDECAR/pair-qr?token=$TOKEN"
 ```
 
 Scan the QR code with the iPhone app. App stores the bearer token in Keychain
 and connects automatically.
 
+Note: CLI `index.ts` requires pi's TypeScript runtime — use the HTTP endpoint above instead.
+
 ## 6. One-liner: build + install + launch
 
 ```bash