diff --git a/docs/operational-state.md b/docs/operational-state.md
index 61dc28bf..45ffb4c0 100644
--- a/docs/operational-state.md
+++ b/docs/operational-state.md
@@ -171,7 +171,7 @@ task nature matters.
 ~/gt/deacon/dogs/boot/
 ```
 
-Session name: `gt-deacon-boot`
+Session name: `gt-boot`
 
 Created/maintained by `bd doctor`.
 
diff --git a/internal/boot/boot.go b/internal/boot/boot.go
index 9476405b..c51808ad 100644
--- a/internal/boot/boot.go
+++ b/internal/boot/boot.go
@@ -16,7 +16,11 @@ import (
 )
 
 // SessionName is the tmux session name for Boot.
-const SessionName = "gt-deacon-boot"
+// Note: We use "gt-boot" instead of "gt-deacon-boot" to avoid tmux prefix
+// matching collisions. Tmux matches session names by prefix, so "gt-deacon-boot"
+// would match when checking for "gt-deacon", causing HasSession("gt-deacon")
+// to return true when only Boot is running.
+const SessionName = "gt-boot"
 
 // MarkerFileName is the file that indicates Boot is currently running.
 const MarkerFileName = ".boot-running"
diff --git a/internal/cmd/boot.go b/internal/cmd/boot.go
index 2ac12332..7f30316c 100644
--- a/internal/cmd/boot.go
+++ b/internal/cmd/boot.go
@@ -36,7 +36,7 @@ Boot lifecycle:
   4. Boot exits (or handoffs in non-degraded mode)
 
 Location: ~/gt/deacon/dogs/boot/
-Session: gt-deacon-boot`,
+Session: gt-boot`,
 }
 
 var bootStatusCmd = &cobra.Command{