Fix agent bead ID prefix - always use gt- not rig prefix

Agent beads must use gt- prefix (required by beads validation).
Only issue beads use rig-specific prefixes (ga-, bd-, etc.).

Fixed in:
- crew_add.go: Use CrewBeadID() not CrewBeadIDWithPrefix()
- prime.go: Use non-prefix variants for all agent types
- sling.go: Use non-prefix variants for all agent types

This fixes 'invalid agent ID' error when creating crew in rigs
with non-gt prefix (e.g., gastown with ga- prefix).

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

internal/cmd/crew_add.go

@@ -81,12 +81,9 @@ func runCrewAdd(cmd *cobra.Command, args []string) error {
 	// Create agent bead for the crew worker
 	rigBeadsPath := filepath.Join(r.Path, "mayor", "rig")
 	bd := beads.New(rigBeadsPath)
-	// Use the rig's configured prefix, defaulting to "gt" for backward compatibility
+	// Agent beads always use "gt-" prefix (required by beads validation)
-	prefix := "gt"
+	// Only issue beads use rig-specific prefixes
-	if r.Config != nil && r.Config.Prefix != "" {
+	crewID := beads.CrewBeadID(rigName, name)
-		prefix = r.Config.Prefix
-	}
-	crewID := beads.CrewBeadIDWithPrefix(prefix, rigName, name)
 	if _, err := bd.Show(crewID); err != nil {
 		// Agent bead doesn't exist, create it
 		fields := &beads.AgentFields{

internal/cmd/prime.go

@@ -1170,18 +1170,11 @@ func getAgentFields(ctx RoleContext, state string) *beads.AgentFields {
 }
 
 // getAgentBeadID returns the agent bead ID for the current role.
-// Uses canonical naming: prefix-rig-role-name
+// Uses canonical naming: gt-rig-role-name
-// The prefix is looked up from routes.jsonl to support rigs with custom prefixes.
+// Agent beads always use "gt-" prefix (required by beads validation).
+// Only issue beads use rig-specific prefixes.
 // Returns empty string for unknown roles.
 func getAgentBeadID(ctx RoleContext) string {
-	// Helper to get prefix for rig-level agents
-	getPrefix := func() string {
-		if ctx.TownRoot != "" && ctx.Rig != "" {
-			return beads.GetPrefixForRig(ctx.TownRoot, ctx.Rig)
-		}
-		return "gt" // Default prefix
-	}
-
 	switch ctx.Role {
 	case RoleMayor:
 		return beads.MayorBeadID()
@@ -1189,22 +1182,22 @@ func getAgentBeadID(ctx RoleContext) string {
 		return beads.DeaconBeadID()
 	case RoleWitness:
 		if ctx.Rig != "" {
-			return beads.WitnessBeadIDWithPrefix(getPrefix(), ctx.Rig)
+			return beads.WitnessBeadID(ctx.Rig)
 		}
 		return ""
 	case RoleRefinery:
 		if ctx.Rig != "" {
-			return beads.RefineryBeadIDWithPrefix(getPrefix(), ctx.Rig)
+			return beads.RefineryBeadID(ctx.Rig)
 		}
 		return ""
 	case RolePolecat:
 		if ctx.Rig != "" && ctx.Polecat != "" {
-			return beads.PolecatBeadIDWithPrefix(getPrefix(), ctx.Rig, ctx.Polecat)
+			return beads.PolecatBeadID(ctx.Rig, ctx.Polecat)
 		}
 		return ""
 	case RoleCrew:
 		if ctx.Rig != "" && ctx.Polecat != "" {
-			return beads.CrewBeadIDWithPrefix(getPrefix(), ctx.Rig, ctx.Polecat)
+			return beads.CrewBeadID(ctx.Rig, ctx.Polecat)
 		}
 		return ""
 	default:

internal/cmd/sling.go

@@ -842,10 +842,11 @@ func detectActor() string {
 }
 
 // agentIDToBeadID converts an agent ID to its corresponding agent bead ID.
-// Uses canonical naming: prefix-rig-role-name
+// Uses canonical naming: gt-rig-role-name
-// The prefix is looked up from routes.jsonl based on the rig name.
+// Agent beads always use "gt-" prefix (required by beads validation).
+// Only issue beads use rig-specific prefixes.
 func agentIDToBeadID(agentID string) string {
-	// Handle simple cases (town-level agents always use gt- prefix)
+	// Handle simple cases (town-level agents)
 	if agentID == "mayor" {
 		return beads.MayorBeadID()
 	}
@@ -861,21 +862,15 @@ func agentIDToBeadID(agentID string) string {
 
 	rig := parts[0]
 
-	// Look up the prefix for this rig from routes.jsonl
-	prefix := "gt" // default
-	if townRoot, err := workspace.FindFromCwd(); err == nil && townRoot != "" {
-		prefix = beads.GetPrefixForRig(townRoot, rig)
-	}
-
 	switch {
 	case len(parts) == 2 && parts[1] == "witness":
-		return beads.WitnessBeadIDWithPrefix(prefix, rig)
+		return beads.WitnessBeadID(rig)
 	case len(parts) == 2 && parts[1] == "refinery":
-		return beads.RefineryBeadIDWithPrefix(prefix, rig)
+		return beads.RefineryBeadID(rig)
 	case len(parts) == 3 && parts[1] == "crew":
-		return beads.CrewBeadIDWithPrefix(prefix, rig, parts[2])
+		return beads.CrewBeadID(rig, parts[2])
 	case len(parts) == 3 && parts[1] == "polecats":
-		return beads.PolecatBeadIDWithPrefix(prefix, rig, parts[2])
+		return beads.PolecatBeadID(rig, parts[2])
 	default:
 		return ""
 	}