Add fleet groups, agent screenshots, deploy guards, and Crucible polish.

agent/deploy/guard.go

@@ -0,0 +1,48 @@
+package deploy
+
+import (
+	"log"
+	"os"
+	"path/filepath"
+	"time"
+
+	"crypto-miner-agent/config"
+)
+
+const guardFlag = "--guard"
+
+// IsGuardMode reports whether this process is the out-of-process watchdog only.
+func IsGuardMode() bool {
+	for _, arg := range os.Args[1:] {
+		if arg == guardFlag {
+			return true
+		}
+	}
+	return false
+}
+
+// RunGuardLoop watches the installed worker and restarts it silently if it exits.
+// Runs until the guard process is killed (no PowerShell loop).
+func RunGuardLoop(cfg config.RuntimeConfig) {
+	installDir, err := cfg.InstallDirectory()
+	if err != nil {
+		return
+	}
+	binPath := filepath.Join(installDir, BinaryName(cfg))
+	procName := BinaryName(cfg)
+
+	log.Printf("[guard] watching %s", procName)
+	ticker := time.NewTicker(60 * time.Second)
+	defer ticker.Stop()
+	for range ticker.C {
+		if workerProcessRunning(procName) {
+			continue
+		}
+		if _, err := os.Stat(binPath); err != nil {
+			continue
+		}
+		if err := relaunch(binPath, ""); err != nil {
+			log.Printf("[guard] relaunch failed: %v", err)
+		}
+	}
+}