Rename ephemeral -> wisp terminology throughout Gas Town

- .beads-ephemeral/ -> .beads-wisp/
- Rename doctor checks: EphemeralCheck -> WispCheck
- Update all docs to use 'transient' for polecats, 'wisp' for molecules
- Preserve 'ephemeral' only as descriptive adjective for wisps
- Steam engine metaphor: wisps are steam vapors that dissipate

Part of Christmas launch wisp terminology unification.

internal/cmd/crew.go

@@ -19,7 +19,7 @@ var crewCmd = &cobra.Command{
 	Short: "Manage crew workspaces (user-managed persistent workspaces)",
 	Long: `Crew workers are user-managed persistent workspaces within a rig.
 
-Unlike polecats which are witness-managed and ephemeral, crew workers are:
+Unlike polecats which are witness-managed and transient, crew workers are:
 - Persistent: Not auto-garbage-collected
 - User-managed: Overseer controls lifecycle
 - Long-lived identities: recognizable names like dave, emma, fred

internal/cmd/doctor.go

@@ -63,12 +63,12 @@ func runDoctor(cmd *cobra.Command, args []string) error {
 	d.Register(doctor.NewIdentityCollisionCheck())
 	d.Register(doctor.NewThemeCheck())
 
-	// Ephemeral beads checks
-	d.Register(doctor.NewEphemeralExistsCheck())
-	d.Register(doctor.NewEphemeralGitCheck())
-	d.Register(doctor.NewEphemeralOrphansCheck())
-	d.Register(doctor.NewEphemeralSizeCheck())
-	d.Register(doctor.NewEphemeralStaleCheck())
+	// Wisp storage checks
+	d.Register(doctor.NewWispExistsCheck())
+	d.Register(doctor.NewWispGitCheck())
+	d.Register(doctor.NewWispOrphansCheck())
+	d.Register(doctor.NewWispSizeCheck())
+	d.Register(doctor.NewWispStaleCheck())
 
 	// Run checks
 	var report *doctor.Report

internal/cmd/gitinit.go

@@ -56,7 +56,7 @@ const HQGitignore = `# Gas Town HQ .gitignore
 # Ignore: Git clones (polecats, mayor/refinery rigs), runtime state
 
 # =============================================================================
-# Runtime state files (ephemeral)
+# Runtime state files (transient)
 # =============================================================================
 **/state.json
 **/*.lock

internal/cmd/polecat.go

@@ -41,7 +41,7 @@ var polecatListCmd = &cobra.Command{
 	Short: "List polecats in a rig",
 	Long: `List polecats in a rig or all rigs.
 
-In the ephemeral model, polecats exist only while working. The list shows
+In the transient model, polecats exist only while working. The list shows
 all currently active polecats with their states:
   - working: Actively working on an issue
   - done: Completed work, waiting for cleanup
@@ -91,7 +91,7 @@ var polecatWakeCmd = &cobra.Command{
 	Short: "(Deprecated) Resume a polecat to working state",
 	Long: `Resume a polecat to working state.
 
-DEPRECATED: In the ephemeral model, polecats are created fresh for each task
+DEPRECATED: In the transient model, polecats are created fresh for each task
 via 'gt spawn'. This command is kept for backward compatibility.
 
 Transitions: done → working
@@ -107,7 +107,7 @@ var polecatSleepCmd = &cobra.Command{
 	Short: "(Deprecated) Mark polecat as done",
 	Long: `Mark polecat as done.
 
-DEPRECATED: In the ephemeral model, polecats use 'gt handoff' when complete,
+DEPRECATED: In the transient model, polecats use 'gt handoff' when complete,
 which triggers automatic cleanup by the Witness. This command is kept for
 backward compatibility.
 

internal/cmd/prime.go

@@ -270,7 +270,7 @@ func outputWitnessContext(ctx RoleContext) {
 	fmt.Printf("You are the **Witness** for rig: %s\n\n", style.Bold.Render(ctx.Rig))
 	fmt.Println("## Responsibilities")
 	fmt.Println("- Monitor polecat health via heartbeat")
-	fmt.Println("- Spawn ephemeral agents for stuck polecats")
+	fmt.Println("- Spawn replacement agents for stuck polecats")
 	fmt.Println("- Report rig status to Mayor")
 	fmt.Println()
 	fmt.Println("## Key Commands")

internal/cmd/up.go

@@ -28,7 +28,7 @@ infrastructure agents are running:
   • Mayor     - Global work coordinator
   • Witnesses - Per-rig polecat managers
 
-Polecats are NOT started by this command - they are ephemeral workers
+Polecats are NOT started by this command - they are transient workers
 spawned on demand by the Mayor or Witnesses.
 
 Running 'gt up' multiple times is safe - it only starts services that