fix(gh-monitor): replace OpenClaw cron with launchd — zero polling token cost

gh-monitor/buildspec.md

@@ -140,24 +140,49 @@ Function:
 
 Entry point: `if __name__ == "__main__": main()`
 
-### STEP 10 — OpenClaw cron job
+### STEP 10 — macOS LaunchAgent
 
-Register via OpenClaw cron API:
-```json
-{
-  "name": "gh-monitor",
-  "schedule": { "kind": "every", "everyMs": 300000 },
-  "payload": {
-    "kind": "systemEvent",
-    "text": "Run GitHub PR monitor: cd ~/Projects/hans-tools/gh-monitor && python3 poll.py"
-  },
-  "sessionTarget": "main"
-}
+Create `~/Library/LaunchAgents/com.hans.gh-monitor.plist`:
+
+```xml
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN"
+  "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+    <key>Label</key>
+    <string>com.hans.gh-monitor</string>
+    <key>ProgramArguments</key>
+    <array>
+        <string>/usr/bin/python3</string>
+        <string>/Users/hansheinemann/Projects/hans-tools/gh-monitor/poll.py</string>
+    </array>
+    <key>StartInterval</key>
+    <integer>300</integer>
+    <key>StandardOutPath</key>
+    <string>/Users/hansheinemann/Projects/hans-tools/gh-monitor/state/stdout.log</string>
+    <key>StandardErrorPath</key>
+    <string>/Users/hansheinemann/Projects/hans-tools/gh-monitor/state/stderr.log</string>
+    <key>RunAtLoad</key>
+    <false/>
+</dict>
+</plist>
 ```
 
-Note: this is a systemEvent (not agentTurn) so it injects into the main session
-and Hans handles it inline. If this proves noisy, switch to agentTurn in isolated
-session.
+Load with:
+```bash
+launchctl load ~/Library/LaunchAgents/com.hans.gh-monitor.plist
+```
+
+Pause/resume:
+```bash
+launchctl unload ~/Library/LaunchAgents/com.hans.gh-monitor.plist
+launchctl load   ~/Library/LaunchAgents/com.hans.gh-monitor.plist
+```
+
+**Token cost:** Zero during polling. The main session is only woken when
+`poll.py` calls `openclaw system event` — i.e. only when real PR activity
+is detected.
 
 ---