diff --git a/packages/host/directory-picker/package.json b/packages/host/directory-picker/package.json
index 5be5940ecd..6fb6652bdc 100644
--- a/packages/host/directory-picker/package.json
+++ b/packages/host/directory-picker/package.json
@@ -22,12 +22,17 @@
       "types": "./lib/types/invariant.d.ts",
       "default": "./lib/invariant.js"
     },
+    "./types": {
+      "types": "./lib/types/types.d.ts",
+      "default": "./lib/types/types.js"
+    },
     "./src/*": "./src/*",
     "./package.json": "./package.json"
   },
   "files": [
     "lib/index.js",
     "lib/invariant.js",
+    "lib/types/**/*.js",
     "lib/types/**/*.d.ts"
   ],
   "license": "MIT",
diff --git a/packages/host/directory-picker/src/index.ts b/packages/host/directory-picker/src/index.ts
index 5e8eb64f87..f4eb0674a2 100644
--- a/packages/host/directory-picker/src/index.ts
+++ b/packages/host/directory-picker/src/index.ts
@@ -12,6 +12,9 @@
  */
 
 import { Context, Service } from '@deepseek-ai/cordis'
+import type { DirectoryListing } from './types.ts'
+
+export type { DirectoryEntry, DirectoryListing } from './types.ts'
 
 /** The native interaction: one OS directory chooser on the host display. */
 export interface DirectoryPickerNativeCapability {
@@ -24,37 +27,6 @@ export interface DirectoryPickerNativeCapability {
   pick(signal: AbortSignal): Promise<string | null>
 }
 
-/** One directory row: a listing child or a breadcrumb ancestor. */
-export interface DirectoryEntry {
-  /** Base name shown in a browser row (a root crumb carries its full path). */
-  name: string
-  /** Absolute host path — clients never join path segments themselves. */
-  path: string
-  /** Hidden by the host platform's convention (dot-prefixed on POSIX); the client owns whether to show it. */
-  hidden: boolean
-}
-
-/** One directory level plus its ancestry, as a browse backend reports it. */
-export interface DirectoryListing {
-  /** Absolute path of the listed directory. */
-  path: string
-  /** The host account's home directory (breadcrumb "Home" rooting). */
-  home: string
-  /**
-   * Ancestor chain from the filesystem root to the listed directory
-   * inclusive; every crumb is a jump target (crumb `hidden` is always false).
-   */
-  crumbs: DirectoryEntry[]
-  /** Direct child directories, name-sorted; symlinks to directories included. */
-  entries: DirectoryEntry[]
-  /**
-   * True when the backend cut `entries` at its complete-result bound: the
-   * level has more child directories than reported, and the missing rows are
-   * the name-sorted tail (hidden rows count toward the bound).
-   */
-  truncated: boolean
-}
-
 /**
  * The browse interaction: listing/creation primitives an in-app browser
  * drives one level at a time. Works for remote clients — nothing renders on
diff --git a/packages/host/directory-picker/src/types.ts b/packages/host/directory-picker/src/types.ts
new file mode 100644
index 0000000000..db1dda57db
--- /dev/null
+++ b/packages/host/directory-picker/src/types.ts
@@ -0,0 +1,39 @@
+/**
+ * Client-safe type surface of the directory-picking seam: what one browse level
+ * looks like to a caller. Types only — no runtime code, and nothing here reaches
+ * a Host-only symbol, so a Client compilation face reads exactly the signatures
+ * the Host emits.
+ *
+ * @module @deepseek-ai/dsh-host-directory-picker/types
+ */
+
+/** One directory row: a listing child or a breadcrumb ancestor. */
+export interface DirectoryEntry {
+  /** Base name shown in a browser row (a root crumb carries its full path). */
+  name: string
+  /** Absolute host path — clients never join path segments themselves. */
+  path: string
+  /** Hidden by the host platform's convention (dot-prefixed on POSIX); the client owns whether to show it. */
+  hidden: boolean
+}
+
+/** One directory level plus its ancestry, as a browse backend reports it. */
+export interface DirectoryListing {
+  /** Absolute path of the listed directory. */
+  path: string
+  /** The host account's home directory (breadcrumb "Home" rooting). */
+  home: string
+  /**
+   * Ancestor chain from the filesystem root to the listed directory
+   * inclusive; every crumb is a jump target (crumb `hidden` is always false).
+   */
+  crumbs: DirectoryEntry[]
+  /** Direct child directories, name-sorted; symlinks to directories included. */
+  entries: DirectoryEntry[]
+  /**
+   * True when the backend cut `entries` at its complete-result bound: the
+   * level has more child directories than reported, and the missing rows are
+   * the name-sorted tail (hidden rows count toward the bound).
+   */
+  truncated: boolean
+}