Merge pull request #123 from akatz-ai/fix/convoy-cross-rig-tracking

fix(sling): Format cross-rig beads as external refs in convoy tracking

internal/cmd/sling.go

@@ -1242,7 +1242,8 @@ func createAutoConvoy(beadID, beadTitle string) (string, error) {
 	}
 
 	// Add tracking relation: convoy tracks the issue
-	depArgs := []string{"dep", "add", convoyID, beadID, "--type=tracks"}
+	trackBeadID := formatTrackBeadID(beadID)
+	depArgs := []string{"dep", "add", convoyID, trackBeadID, "--type=tracks"}
 	depCmd := exec.Command("bd", depArgs...)
 	depCmd.Dir = townBeads
 	depCmd.Stderr = os.Stderr
@@ -1280,10 +1281,10 @@ func runBatchSling(beadIDs []string, rigName string, townBeadsDir string) error
 
 	// Track results for summary
 	type slingResult struct {
-		beadID   string
-		polecat  string
-		success  bool
-		errMsg   string
+		beadID  string
+		polecat string
+		success bool
+		errMsg  string
 	}
 	results := make([]slingResult, 0, len(beadIDs))
 
@@ -1401,3 +1402,24 @@ func runBatchSling(beadIDs []string, rigName string, townBeadsDir string) error
 
 	return nil
 }
+
+// formatTrackBeadID formats a bead ID for use in convoy tracking dependencies.
+// Cross-rig beads (non-hq- prefixed) are formatted as external references
+// so the bd tool can resolve them when running from HQ context.
+//
+// Examples:
+//   - "hq-abc123" -> "hq-abc123" (HQ beads unchanged)
+//   - "gt-mol-xyz" -> "external:gt-mol:gt-mol-xyz"
+//   - "beads-task-123" -> "external:beads-task:beads-task-123"
+func formatTrackBeadID(beadID string) string {
+	if strings.HasPrefix(beadID, "hq-") {
+		return beadID
+	}
+	parts := strings.SplitN(beadID, "-", 3)
+	if len(parts) >= 2 {
+		rigPrefix := parts[0] + "-" + parts[1]
+		return fmt.Sprintf("external:%s:%s", rigPrefix, beadID)
+	}
+	// Fallback for malformed IDs (single segment)
+	return beadID
+}