diff --git a/crates/app-tauri/tests/dto_plugins.rs b/crates/app-tauri/tests/dto_plugins.rs
index a350e1ba..b20a6628 100644
--- a/crates/app-tauri/tests/dto_plugins.rs
+++ b/crates/app-tauri/tests/dto_plugins.rs
@@ -50,6 +50,7 @@ fn runtime_catalog_dto_carries_bundle_hash_and_contributions() {
             publisher: None,
             version: "1.2.3".to_owned(),
             bundle_url: "idea-plugin://dev.acme.gitgraph/1.2.3/abc/dist/index.js".to_owned(),
+            plugin_root: "/data/idea/plugins/installed/dev.acme.gitgraph".to_owned(),
             icon_url: None,
             content_hash: "abc".to_owned(),
             capabilities: vec![PluginCapability::Ui, PluginCapability::Tooling],
@@ -64,6 +65,10 @@ fn runtime_catalog_dto_carries_bundle_hash_and_contributions() {
         "idea-plugin://dev.acme.gitgraph/1.2.3/abc/dist/index.js"
     );
     assert_eq!(value["plugins"][0]["contentHash"], "abc");
+    assert_eq!(
+        value["plugins"][0]["pluginRoot"],
+        "/data/idea/plugins/installed/dev.acme.gitgraph"
+    );
     assert_eq!(
         value["plugins"][0]["capabilities"],
         serde_json::json!(["ui", "tooling"])
diff --git a/crates/application/src/plugin/mod.rs b/crates/application/src/plugin/mod.rs
index cba849eb..e59e52c6 100644
--- a/crates/application/src/plugin/mod.rs
+++ b/crates/application/src/plugin/mod.rs
@@ -184,6 +184,8 @@ pub struct PluginRuntimePlugin {
     pub version: String,
     /// Bundle URL.
     pub bundle_url: String,
+    /// Canonical host-local root of the installed plugin package.
+    pub plugin_root: String,
     /// Icon URL.
     pub icon_url: Option<String>,
     /// Content hash.
@@ -3022,6 +3024,10 @@ pub(crate) async fn runtime_plugin_from_entry(
         &descriptor.registry.content_hash,
         &descriptor.manifest.main,
     )?;
+    let plugin_root = packages
+        .installed_plugin_root(&descriptor.manifest.id)
+        .await
+        .map_err(map_store)?;
     let icon_url = match &descriptor.manifest.icon {
         Some(icon) => Some(checked_plugin_asset_url(
             packages,
@@ -3038,6 +3044,7 @@ pub(crate) async fn runtime_plugin_from_entry(
         publisher: descriptor.manifest.publisher,
         version: descriptor.manifest.version.as_str().to_owned(),
         bundle_url: bundle,
+        plugin_root: plugin_root.as_str().to_owned(),
         icon_url,
         content_hash: descriptor.registry.content_hash.as_str().to_owned(),
         capabilities: descriptor.manifest.capabilities,
@@ -4203,6 +4210,10 @@ mod tests {
         let catalog = usecase.execute().await.unwrap();
 
         assert_eq!(catalog.plugins.len(), 1);
+        assert_eq!(
+            catalog.plugins[0].plugin_root,
+            "/installed/dev.acme.gitgraph"
+        );
         assert_eq!(
             catalog.plugins[0].capabilities,
             vec![
diff --git a/crates/application/src/slash_command.rs b/crates/application/src/slash_command.rs
index 90e5cd5d..0ef6d163 100644
--- a/crates/application/src/slash_command.rs
+++ b/crates/application/src/slash_command.rs
@@ -426,6 +426,7 @@ mod tests {
                 publisher: None,
                 version: "1.0.0".to_owned(),
                 bundle_url: "idea-plugin://dev.acme.plugin/1.0.0/hash/dist/index.js".to_owned(),
+                plugin_root: "/plugins/installed/dev.acme.plugin".to_owned(),
                 icon_url: None,
                 content_hash: "abc".to_owned(),
                 capabilities: vec![domain::PluginCapability::Ui],
diff --git a/crates/backend/src/dto.rs b/crates/backend/src/dto.rs
index a35dee3d..5b942c74 100644
--- a/crates/backend/src/dto.rs
+++ b/crates/backend/src/dto.rs
@@ -382,6 +382,8 @@ pub struct PluginRuntimePluginDto {
     pub version: String,
     /// Bundle URL.
     pub bundle_url: String,
+    /// Canonical host-local root of the installed plugin package.
+    pub plugin_root: String,
     /// Icon URL.
     pub icon_url: Option<String>,
     /// Content hash.
@@ -414,6 +416,7 @@ impl From<application::PluginRuntimePlugin> for PluginRuntimePluginDto {
             publisher: value.publisher,
             version: value.version,
             bundle_url: value.bundle_url,
+            plugin_root: value.plugin_root,
             icon_url: value.icon_url,
             content_hash: value.content_hash,
             capabilities: value.capabilities,
diff --git a/crates/domain/src/ports.rs b/crates/domain/src/ports.rs
index 117da86a..4ae0246c 100644
--- a/crates/domain/src/ports.rs
+++ b/crates/domain/src/ports.rs
@@ -440,6 +440,19 @@ pub trait PluginPackageStore: Send + Sync {
     /// Lists committed package roots.
     async fn list_installed(&self) -> Result<Vec<PluginPackageRef>, PluginStoreError>;
 
+    /// Resolves the host-local root of one committed plugin package.
+    async fn installed_plugin_root(
+        &self,
+        plugin_id: &crate::PluginId,
+    ) -> Result<LocalPath, PluginStoreError> {
+        self.list_installed()
+            .await?
+            .into_iter()
+            .find(|package| package.plugin_id.as_ref() == Some(plugin_id))
+            .map(|package| LocalPath::new(package.root))
+            .ok_or(PluginStoreError::NotFound)
+    }
+
     /// Reads `idea-plugin.json` from a package root.
     async fn read_manifest(
         &self,
diff --git a/crates/infrastructure/src/plugin/mod.rs b/crates/infrastructure/src/plugin/mod.rs
index b1964638..2491dd63 100644
--- a/crates/infrastructure/src/plugin/mod.rs
+++ b/crates/infrastructure/src/plugin/mod.rs
@@ -141,6 +141,21 @@ impl PluginPackageStore for FsPluginPackageStore {
         Ok(out)
     }
 
+    async fn installed_plugin_root(
+        &self,
+        plugin_id: &PluginId,
+    ) -> Result<LocalPath, PluginStoreError> {
+        let root = self.installed_plugin_dir(plugin_id);
+        let canonical = root.canonicalize().map_err(|error| {
+            if error.kind() == io::ErrorKind::NotFound {
+                PluginStoreError::NotFound
+            } else {
+                PluginStoreError::Io(error.to_string())
+            }
+        })?;
+        Ok(LocalPath::new(canonical.to_string_lossy().into_owned()))
+    }
+
     async fn read_manifest(
         &self,
         package: &PluginPackageRef,
diff --git a/crates/infrastructure/tests/plugin_install_load.rs b/crates/infrastructure/tests/plugin_install_load.rs
index d8659781..e4ca5fcc 100644
--- a/crates/infrastructure/tests/plugin_install_load.rs
+++ b/crates/infrastructure/tests/plugin_install_load.rs
@@ -134,6 +134,13 @@ async fn installs_reference_fixture_and_loads_runtime_catalog() {
     assert!(plugin
         .bundle_url
         .starts_with("idea-plugin://dev.idea.fixtures.reference-minimal/0.1.0/"));
+    assert_eq!(
+        PathBuf::from(&plugin.plugin_root),
+        app_data
+            .join("plugins/installed/dev.idea.fixtures.reference-minimal")
+            .canonicalize()
+            .unwrap()
+    );
     assert_eq!(plugin.contributes.menus.len(), 1);
     assert_eq!(plugin.contributes.menu_items.len(), 1);
 
@@ -183,6 +190,13 @@ async fn installs_sdk_hello_plugin_and_loads_runtime_catalog() {
         .bundle_url
         .starts_with("idea-plugin://com.example.hello-plugin/0.1.0/"));
     assert!(plugin.bundle_url.ends_with("/dist/index.js"));
+    assert_eq!(
+        PathBuf::from(&plugin.plugin_root),
+        app_data
+            .join("plugins/installed/com.example.hello-plugin")
+            .canonicalize()
+            .unwrap()
+    );
     assert_eq!(plugin.contributes.menus[0].id, "hello-plugin.menu");
     assert_eq!(plugin.contributes.menus[0].label.as_str(), "Hello Plugin");
     assert_eq!(
diff --git a/frontend/src/domain/index.ts b/frontend/src/domain/index.ts
index a4f61a0b..841a820d 100644
--- a/frontend/src/domain/index.ts
+++ b/frontend/src/domain/index.ts
@@ -2004,6 +2004,8 @@ export interface PluginRuntimePlugin {
    */
   activationScope?: "app" | "project";
   bundleUrl: string;
+  /** Canonical host-local root of the active installed plugin package. */
+  pluginRoot: string;
   iconUrl?: string;
   contentHash: string;
   contributes: PluginContributionDto;
diff --git a/frontend/src/features/plugins/PluginRuntimeProvider.test.tsx b/frontend/src/features/plugins/PluginRuntimeProvider.test.tsx
index 0a6b7149..16fc313b 100644
--- a/frontend/src/features/plugins/PluginRuntimeProvider.test.tsx
+++ b/frontend/src/features/plugins/PluginRuntimeProvider.test.tsx
@@ -23,6 +23,7 @@ function runtimePlugin(overrides: Partial<PluginRuntimePlugin> = {}): PluginRunt
     displayName: "Refreshable v1",
     version: "1.0.0",
     bundleUrl: dataUrl("export function activate() {}"),
+    pluginRoot: "/data/idea/plugins/installed/dev.acme.refreshable",
     contentHash: "v1",
     contributes: { menus: [], menuItems: [], layouts: [], mcpServers: [] },
     ...overrides,
diff --git a/frontend/src/features/plugins/plugins.test.tsx b/frontend/src/features/plugins/plugins.test.tsx
index 782f037b..70b3a5f8 100644
--- a/frontend/src/features/plugins/plugins.test.tsx
+++ b/frontend/src/features/plugins/plugins.test.tsx
@@ -101,6 +101,7 @@ class ProjectScopedRuntimeCatalogPluginGateway extends MockPluginGateway {
           version: "1.0.0",
           activationScope: "project",
           bundleUrl: this.bundleUrl,
+          pluginRoot: "/data/idea/plugins/installed/dev.acme.project-plugin",
           contentHash: "project-plugin",
           contributes: { menus: [], menuItems: [], layouts: [], mcpServers: [] },
         },
@@ -127,6 +128,7 @@ class MixedActivationScopeRuntimeCatalogPluginGateway extends MockPluginGateway
           capabilities: ["tooling"],
           activationScope: "app",
           bundleUrl: this.failingAppBundleUrl,
+          pluginRoot: "/data/idea/plugins/installed/dev.acme.app-needs-project",
           contentHash: "app-needs-project",
           contributes: { menus: [], menuItems: [], layouts: [], mcpServers: [] },
         },
@@ -136,6 +138,7 @@ class MixedActivationScopeRuntimeCatalogPluginGateway extends MockPluginGateway
           version: "1.0.0",
           activationScope: "project",
           bundleUrl: this.projectBundleUrl,
+          pluginRoot: "/data/idea/plugins/installed/dev.acme.project-plugin",
           contentHash: "project-plugin",
           contributes: { menus: [], menuItems: [], layouts: [], mcpServers: [] },
         },
diff --git a/frontend/src/plugins/runtime/loader.test.ts b/frontend/src/plugins/runtime/loader.test.ts
index 90a2382f..892f1cee 100644
--- a/frontend/src/plugins/runtime/loader.test.ts
+++ b/frontend/src/plugins/runtime/loader.test.ts
@@ -29,6 +29,7 @@ function entry(overrides: Partial<PluginRuntimePlugin> & { bundleUrl: string }):
     id: "mock.plugin",
     displayName: "Mock Plugin",
     version: "1.0.0",
+    pluginRoot: "/data/idea/plugins/installed/mock.plugin",
     contentHash: "abc123",
     contributes: emptyContributes(),
     ...overrides,
@@ -39,17 +40,25 @@ describe("loadPlugins", () => {
   it("loads a well-formed plugin bundle and calls activate(ctx)", async () => {
     const bundle = dataUrl(`
       export function activate(ctx) {
-        globalThis.__activatedWith = ctx.pluginId;
+        globalThis.__activatedWith = { pluginId: ctx.pluginId, pluginRoot: ctx.pluginRoot };
         return {};
       }
     `);
     const { registry, failures } = await loadPlugins(
-      [entry({ id: "dev.acme.one", displayName: "One", bundleUrl: bundle })],
+      [entry({
+        id: "dev.acme.one",
+        displayName: "One",
+        bundleUrl: bundle,
+        pluginRoot: "/data/idea/plugins/installed/dev.acme.one",
+      })],
       gateways,
     );
     expect(failures).toEqual([]);
     expect(registry.list().map((p) => p.pluginId)).toEqual(["dev.acme.one"]);
-    expect((globalThis as Record<string, unknown>).__activatedWith).toBe("dev.acme.one");
+    expect((globalThis as Record<string, unknown>).__activatedWith).toEqual({
+      pluginId: "dev.acme.one",
+      pluginRoot: "/data/idea/plugins/installed/dev.acme.one",
+    });
   });
 
   it("loads an SDK-style default export containing activate(ctx)", async () => {
@@ -242,6 +251,7 @@ describe("loadPlugins", () => {
       "menu",
       "pluginDisplayName",
       "pluginId",
+      "pluginRoot",
       "services",
       "storage",
       "subscriptions",
diff --git a/frontend/src/plugins/runtime/loader.ts b/frontend/src/plugins/runtime/loader.ts
index 21767ab4..839b90e1 100644
--- a/frontend/src/plugins/runtime/loader.ts
+++ b/frontend/src/plugins/runtime/loader.ts
@@ -38,6 +38,7 @@ export type { PluginGatewaySet } from "./registry";
 
 export interface IdeaPluginContext {
   pluginId: string;
+  pluginRoot: string;
   pluginDisplayName: string;
   version: string;
   logger: PluginLogger;
@@ -270,6 +271,7 @@ async function loadOne(
   const pluginId = safePluginId(entry);
   const displayName = nonEmptyString(entryObject.displayName) ?? pluginId;
   const version = nonEmptyString(entryObject.version) ?? "";
+  const pluginRoot = nonEmptyString(entryObject.pluginRoot);
   let activation: void | PluginActivation = undefined;
   const subscriptions: Disposable[] = [];
   try {
@@ -280,6 +282,9 @@ async function loadOne(
     if (!bundleUrl) {
       throw new Error("missing plugin bundle URL");
     }
+    if (!pluginRoot) {
+      throw new Error("missing installed plugin root");
+    }
 
     installHostReactImportMap();
     const mod = resolveIdeaPluginModule(
@@ -308,6 +313,7 @@ async function loadOne(
 
     const ctx: IdeaPluginContext = {
       pluginId,
+      pluginRoot,
       pluginDisplayName: displayName,
       version,
       logger: createPluginLogger(entry),
diff --git a/sdk/IdeaSDK b/sdk/IdeaSDK
index 68019dec..e3a0f46f 160000
--- a/sdk/IdeaSDK
+++ b/sdk/IdeaSDK
@@ -1 +1 @@
-Subproject commit 68019dec58e25cc4f7c8e45b1b7e35f76a7eb95c
+Subproject commit e3a0f46f9d8bbe431a6b09cfeaa20cc6b49d076f