diff --git a/app/src-tauri/src/commands/docker_commands.rs b/app/src-tauri/src/commands/docker_commands.rs
index d8f7a32..598a42a 100644
--- a/app/src-tauri/src/commands/docker_commands.rs
+++ b/app/src-tauri/src/commands/docker_commands.rs
@@ -37,20 +37,3 @@ pub async fn get_container_info(
     docker::get_container_info(&project).await
 }
 
-#[tauri::command]
-pub async fn list_sibling_containers() -> Result<Vec<serde_json::Value>, String> {
-    let containers = docker::list_sibling_containers().await?;
-    let result: Vec<serde_json::Value> = containers
-        .into_iter()
-        .map(|c| {
-            serde_json::json!({
-                "id": c.id,
-                "names": c.names,
-                "image": c.image,
-                "state": c.state,
-                "status": c.status,
-            })
-        })
-        .collect();
-    Ok(result)
-}
diff --git a/app/src-tauri/src/docker/container.rs b/app/src-tauri/src/docker/container.rs
index 58b84c8..63dda7b 100644
--- a/app/src-tauri/src/docker/container.rs
+++ b/app/src-tauri/src/docker/container.rs
@@ -3895,30 +3895,6 @@ pub async fn is_container_running(container_id: &str) -> Result<bool, String> {
     }
 }
 
-pub async fn list_sibling_containers() -> Result<Vec<ContainerSummary>, String> {
-    let docker = get_docker()?;
-
-    let all_containers: Vec<ContainerSummary> = docker
-        .list_containers(Some(ListContainersOptions::<String> {
-            all: true,
-            ..Default::default()
-        }))
-        .await
-        .map_err(|e| format!("Failed to list containers: {}", e))?;
-
-    let siblings: Vec<ContainerSummary> = all_containers
-        .into_iter()
-        .filter(|c| {
-            if let Some(labels) = &c.labels {
-                !labels.contains_key(LABEL_MANAGED)
-            } else {
-                true
-            }
-        })
-        .collect();
-
-    Ok(siblings)
-}
 
 #[cfg(test)]
 mod tests {
diff --git a/app/src-tauri/src/lib.rs b/app/src-tauri/src/lib.rs
index 725ff4a..75b8924 100644
--- a/app/src-tauri/src/lib.rs
+++ b/app/src-tauri/src/lib.rs
@@ -435,7 +435,6 @@ pub fn run() {
             commands::docker_commands::check_image_exists,
             commands::docker_commands::build_image,
             commands::docker_commands::get_container_info,
-            commands::docker_commands::list_sibling_containers,
             // Projects
             commands::project_commands::list_projects,
             commands::project_commands::add_project,
@@ -699,9 +698,11 @@ mod tests {
     ///
     /// The reverse direction matters too, and for a sharper reason: a command
     /// that is registered but reachable from nowhere is still IPC surface a
-    /// compromised webview can call. `list_sibling_containers` — which returns
+    /// compromised webview can call. `list_sibling_containers` — which returned
     /// every container on the daemon, including the user's unrelated work —
-    /// sat in exactly that state.
+    /// sat in exactly that state, and this test is what found it. It has since
+    /// been removed at all four levels: registration, command, docker helper,
+    /// and the frontend wrapper and type.
     ///
     /// So this asserts the two lists agree, and leaves *deciding* what belongs
     /// on them to a human. It cannot see frontend call sites; `tsc` and the
diff --git a/app/src/lib/tauri-commands.ts b/app/src/lib/tauri-commands.ts
index ac5b847..e071461 100644
--- a/app/src/lib/tauri-commands.ts
+++ b/app/src/lib/tauri-commands.ts
@@ -1,5 +1,5 @@
 import { invoke } from "@tauri-apps/api/core";
-import type { Project, ProjectPath, ContainerInfo, SiblingContainer, AppSettings, UpdateInfo, ImageUpdateInfo, FileEntry, FileContents, WebTerminalInfo, SttStatus, GatewayStatus, InstallOptions, ClaudeSession, ContainerCapabilities, ScheduledTask, ScheduledTaskInput, SchedulerNotification, AuthBridgeStatus, BrowserViewStatus, BrowserViewPopoutState, BrowserPageState, PlaywrightDetection, BrowserSetupOutcome, BrowserInstallTarget, ContainerStaleness, MigrationOptions, MigrationReport, MigrationState, ClearTokenOutcome, CaCertInfo } from "./types";
+import type { Project, ProjectPath, ContainerInfo, AppSettings, UpdateInfo, ImageUpdateInfo, FileEntry, FileContents, WebTerminalInfo, SttStatus, GatewayStatus, InstallOptions, ClaudeSession, ContainerCapabilities, ScheduledTask, ScheduledTaskInput, SchedulerNotification, AuthBridgeStatus, BrowserViewStatus, BrowserViewPopoutState, BrowserPageState, PlaywrightDetection, BrowserSetupOutcome, BrowserInstallTarget, ContainerStaleness, MigrationOptions, MigrationReport, MigrationState, ClearTokenOutcome, CaCertInfo } from "./types";
 
 // Docker
 export const checkDocker = () => invoke<boolean>("check_docker");
@@ -7,8 +7,6 @@ export const checkImageExists = () => invoke<boolean>("check_image_exists");
 export const buildImage = () => invoke<void>("build_image");
 export const getContainerInfo = (projectId: string) =>
   invoke<ContainerInfo | null>("get_container_info", { projectId });
-export const listSiblingContainers = () =>
-  invoke<SiblingContainer[]>("list_sibling_containers");
 
 // Projects
 export const listProjects = () => invoke<Project[]>("list_projects");
diff --git a/app/src/lib/types.ts b/app/src/lib/types.ts
index 641820f..a54d678 100644
--- a/app/src/lib/types.ts
+++ b/app/src/lib/types.ts
@@ -193,13 +193,6 @@ export interface ContainerInfo {
   image: string;
 }
 
-export interface SiblingContainer {
-  id: string;
-  names: string[] | null;
-  image: string;
-  state: string;
-  status: string;
-}
 
 export interface TerminalSession {
   id: string;