diff --git a/docs/sourceos-shell-launcher-bridge.md b/docs/sourceos-shell-launcher-bridge.md
index 87287df..2bfd034 100644
--- a/docs/sourceos-shell-launcher-bridge.md
+++ b/docs/sourceos-shell-launcher-bridge.md
@@ -1,6 +1,6 @@
-# sourceos-shell launcher bridge note
+# sourceos-shell command bus note
 
-During the early shell rollout, launcher integration is tracked as temporary bridge work.
+During the early shell rollout, launcher/search integration is tracked as temporary command-bus work.
 
 ## Routing rule
 
@@ -12,7 +12,9 @@ Queries are routed by scope:
 
 ## Required invariant
 
-For `files` queries, Albert must not perform a second file-search pass in parallel with the Linux-native provider.
+For `files` queries, the command bus must not perform a second file-search pass in parallel with the Linux-native provider.
+
+Lampstand is the intended Linux-native file authority for this lane.
 
 ## Realization scaffolds
 
@@ -21,8 +23,8 @@ The Linux realization currently carries placeholder search-provider material at:
 - `linux/desktop/sourceos-search-provider.conf`
 - `/etc/sourceos-shell/search-provider.json` (realized by the shell Nix module scaffold)
 
-These capture the intended rollout mode and the provider choice for the Linux-native file search lane.
+These capture the intended rollout mode, routing invariant, and the provider choice for the Linux-native file search lane.
 
 ## Lifecycle
 
-This bridge exists only until the shell's own command/search surface fully absorbs the routing behavior.
+This command-bus/search-provider surface exists only until the shell's own command/search runtime fully absorbs the routing behavior.
diff --git a/linux/desktop/sourceos-search-provider.conf b/linux/desktop/sourceos-search-provider.conf
index dc610ce..b35fd7e 100644
--- a/linux/desktop/sourceos-search-provider.conf
+++ b/linux/desktop/sourceos-search-provider.conf
@@ -1,11 +1,15 @@
 # SourceOS shell search-provider scaffold
-# This file records the intended launcher/search routing policy during early shell rollout.
+# This file records the intended command-bus/search routing policy during early shell rollout.
 
-mode=launcher-bridge
-linux-file-provider=tracker3
+mode=command-bus
+linux-file-provider=lampstand
 invariant=no_redundant_file_search
 
 # scopes
 apps=launcher
 files=linux-native-only
 web=browser-agent
+
+# notes
+# - Lampstand is the Linux-native file authority for scope=files.
+# - The command bus remains a frontend and must not perform a second file-search pass.
diff --git a/modules/nixos/sourceos-shell/default.nix b/modules/nixos/sourceos-shell/default.nix
index e0e7cc4..1be9482 100644
--- a/modules/nixos/sourceos-shell/default.nix
+++ b/modules/nixos/sourceos-shell/default.nix
@@ -38,14 +38,14 @@ in
 
     searchProvider = {
       mode = lib.mkOption {
-        type = lib.types.enum [ "linux-native" "launcher-bridge" "shell-native" ];
-        default = "launcher-bridge";
+        type = lib.types.enum [ "linux-native" "command-bus" "shell-native" ];
+        default = "command-bus";
         description = "Search routing mode during shell rollout.";
       };
 
       linuxFileProvider = lib.mkOption {
-        type = lib.types.enum [ "tracker3" "fd" "locate" ];
-        default = "tracker3";
+        type = lib.types.enum [ "lampstand" "fd" "locate" ];
+        default = "lampstand";
         description = "Linux-native file search provider used when scope=files.";
       };
     };
@@ -72,6 +72,10 @@ in
         files = "linux-native-only";
         web = "browser-agent";
       };
+      notes = [
+        "Lampstand is the Linux-native file authority for scope=files."
+        "The command bus remains a frontend and must not perform a second file-search pass."
+      ];
     };
 
     systemd.services.sourceos-shell = {