refactor: migrate callers from deprecated MayorBeadID/DeaconBeadID to Town variants (gt-gbw0a)

Update all callers of deprecated MayorBeadID()/DeaconBeadID() to use
MayorBeadIDTown()/DeaconBeadIDTown() which return hq- prefix IDs for
town-level beads storage.

Changes:
- internal/daemon/lifecycle.go: identityToAgentBeadID and checkStaleAgents
- internal/cmd/prime.go: getAgentBeadID
- internal/cmd/molecule_status.go: buildAgentBeadID
- internal/cmd/prime_test.go: update expected values to hq-*
- Comments updated to reflect hq- prefix for town-level agents

The deprecated functions remain for backward compatibility and are used
by the migration tool (migrate_agents.go).

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

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

internal/cmd/molecule_attach.go

@@ -54,7 +54,7 @@ func runMoleculeAttach(cmd *cobra.Command, args []string) error {
 }
 
 // detectAgentBeadID detects the current agent's bead ID from the working directory.
-// Returns the agent bead ID (e.g., "gt-mayor", "gt-gastown-polecat-nux") or empty string if not detectable.
+// Returns the agent bead ID (e.g., "hq-mayor", "gt-gastown-polecat-nux") or empty string if not detectable.
 func detectAgentBeadID() (string, error) {
 	cwd, err := os.Getwd()
 	if err != nil {

internal/cmd/molecule_status.go

@@ -18,9 +18,10 @@ import (
 
 // buildAgentBeadID constructs the agent bead ID from an agent identity.
 // Uses canonical naming: prefix-rig-role-name
+// Town-level agents use hq- prefix; rig-level agents use rig's prefix.
 // Examples:
-//   - "mayor" -> "gt-mayor"
-//   - "deacon" -> "gt-deacon"
+//   - "mayor" -> "hq-mayor"
+//   - "deacon" -> "hq-deacon"
 //   - "gastown/witness" -> "gt-gastown-witness"
 //   - "gastown/refinery" -> "gt-gastown-refinery"
 //   - "gastown/nux" (polecat) -> "gt-gastown-polecat-nux"
@@ -34,9 +35,9 @@ func buildAgentBeadID(identity string, role Role) string {
 	if role == RoleUnknown || role == Role("") {
 		switch {
 		case identity == "mayor":
-			return beads.MayorBeadID()
+			return beads.MayorBeadIDTown()
 		case identity == "deacon":
-			return beads.DeaconBeadID()
+			return beads.DeaconBeadIDTown()
 		case len(parts) == 2 && parts[1] == "witness":
 			return beads.WitnessBeadID(parts[0])
 		case len(parts) == 2 && parts[1] == "refinery":
@@ -57,9 +58,9 @@ func buildAgentBeadID(identity string, role Role) string {
 
 	switch role {
 	case RoleMayor:
-		return beads.MayorBeadID()
+		return beads.MayorBeadIDTown()
 	case RoleDeacon:
-		return beads.DeaconBeadID()
+		return beads.DeaconBeadIDTown()
 	case RoleWitness:
 		if len(parts) >= 1 {
 			return beads.WitnessBeadID(parts[0])

internal/cmd/prime.go

@@ -1245,14 +1245,14 @@ func getAgentFields(ctx RoleContext, state string) *beads.AgentFields {
 }
 
 // getAgentBeadID returns the agent bead ID for the current role.
-// Rig-scoped agents use the rig's configured prefix; town agents remain gt-.
+// Town-level agents (mayor, deacon) use hq- prefix; rig-scoped agents use the rig's prefix.
 // Returns empty string for unknown roles.
 func getAgentBeadID(ctx RoleContext) string {
 	switch ctx.Role {
 	case RoleMayor:
-		return beads.MayorBeadID()
+		return beads.MayorBeadIDTown()
 	case RoleDeacon:
-		return beads.DeaconBeadID()
+		return beads.DeaconBeadIDTown()
 	case RoleWitness:
 		if ctx.Rig != "" {
 			prefix := beads.GetPrefixForRig(ctx.TownRoot, ctx.Rig)

internal/cmd/prime_test.go

@@ -36,7 +36,7 @@ func TestGetAgentBeadID_UsesRigPrefix(t *testing.T) {
 				Role:     RoleMayor,
 				TownRoot: townRoot,
 			},
-			want: "gt-mayor",
+			want: "hq-mayor",
 		},
 		{
 			name: "deacon",
@@ -44,7 +44,7 @@ func TestGetAgentBeadID_UsesRigPrefix(t *testing.T) {
 				Role:     RoleDeacon,
 				TownRoot: townRoot,
 			},
-			want: "gt-deacon",
+			want: "hq-deacon",
 		},
 		{
 			name: "witness",