diff --git a/docs/PROJECT-STRUCTURE.md b/docs/PROJECT-STRUCTURE.md
index 443bc4c..3c0ef0f 100644
--- a/docs/PROJECT-STRUCTURE.md
+++ b/docs/PROJECT-STRUCTURE.md
@@ -169,7 +169,9 @@ simple hosts. `engine/Age.Engine/Hosting/IMovieHost.cs` owns ordinary, positione
 and modal movie playback contracts. `IHost` inherits all four focused contracts; their required and default
 behavior is unchanged. `engine/Age.Engine/Hosting/IGraphicsHost.cs` owns mutable surfaces, retained-range/frame
 presentation, transitions, texture lifecycle, pixel capture/replace, draw, and size contracts; `IHost` also
-inherits this focused surface without changing existing hosts. The neutral
+inherits this focused surface without changing existing hosts. `engine/Age.Engine/Hosting/IInputHost.cs` owns
+modal fullwidth entry, ADV waits/callback servicing, input clock, cursor resources, and skip-state interaction;
+its required wait and overload/default chains remain unchanged. The neutral
 `engine/Age.Engine/Model/MovieMaskTransitionRequest.cs` record carries movie mask work between the VM, host, and
 retained graphics without making `Model` depend on `Hosting`.
 `engine/Age.Engine/Model/RgbaImage.cs` owns the format-independent packed RGBA image transported between SYS4
diff --git a/docs/remake-architecture-and-roadmap.md b/docs/remake-architecture-and-roadmap.md
index e55b3c5..8a39569 100644
--- a/docs/remake-architecture-and-roadmap.md
+++ b/docs/remake-architecture-and-roadmap.md
@@ -798,6 +798,12 @@ do not mix mechanical moves with semantic changes.
    imported `Model`, so no call sites changed; surface request shape, enum values, and graphics behavior remain
    unchanged. Runtime validation remains green.
 
+   The eighth bounded contract slice introduced `IInputHost` for modal fullwidth entry, ADV wait overloads and
+   callback servicing, input clock, cursor resources, and skip-state interaction. `IHost` inherits the focused
+   contract; all fourteen members, the required base wait, overload/default chains, and existing host classes
+   remain behaviorally unchanged. Input transport records remain in their prior locations pending a separate
+   cleanup. Runtime validation remains green.
+
 4. **Make the build graph express source ownership.** Stop linking production `.cs` files from `godot/` and
    `tools/movie-corpus-gate/` into `Age.Engine.Tests`. Extract the platform-neutral frontend/movie/diagnostic
    code into a small production project referenced by Godot, tests, and the corpus gate. Retain both existing
@@ -1158,9 +1164,8 @@ layer's rendering diverges from ADV; save layout.
 ## 8. Immediate next step
 Continue step 3 of the **codebase consolidation** maintenance slice: clarify runtime contracts without changing
 behavior or the aggregate host accepted by the VM. With diagnostic, lifecycle, audio, and movie contracts
-established beneath `IHost`, shared movie/image transport neutral, and the graphics contract now separated, move
-the input host contract next: modal text entry, ADV waits and callback servicing, input clock, cursor resources,
-and skip-state interaction. Preserve the existing overload/default chains and aggregate `IHost` entry point before
-separating the remaining ADV text/presentation contract.
+established beneath `IHost`, shared graphics transport neutral, and graphics/input contracts now separated, move
+the unchanged `FullwidthTextEditRequest`, `FullwidthTextEditResult`, and `AdvAutoWaitState` declarations from
+`Hosting` to `Model` next. Preserve all consumers before extracting the remaining ADV text/presentation contract.
 Concrete playthrough blockers may still preempt this bounded maintenance work; the consolidation effort does
 not replace Phase B gameplay validation or the open cross-platform gates.
diff --git a/engine/Age.Engine/Hosting/IHost.cs b/engine/Age.Engine/Hosting/IHost.cs
index b9b1822..dc7810b 100644
--- a/engine/Age.Engine/Hosting/IHost.cs
+++ b/engine/Age.Engine/Hosting/IHost.cs
@@ -27,11 +27,8 @@ public readonly record struct DiagnosticMessage(string Caption, string Text);
 public readonly record struct FullwidthTextEditRequest(string CurrentText, string InitialText);
 public readonly record struct FullwidthTextEditResult(bool Accepted, string Text);
 
-public interface IHost : IDiagnosticHost, ILifecycleHost, IAudioHost, IMovieHost, IGraphicsHost
+public interface IHost : IDiagnosticHost, ILifecycleHost, IAudioHost, IMovieHost, IGraphicsHost, IInputHost
 {
-    /// <summary>Present AGERc's modal full-width editor. Cancel preserves CurrentText.</summary>
-    FullwidthTextEditResult EditFullwidthString(FullwidthTextEditRequest request)
-        => new(false, request.CurrentText);
     void ShowText(int offset, string text);
     void ShowText(AdvLiveTextRun run, int glyphDelayMilliseconds)
         => ShowText(run.SourceOffset, run.Text);
@@ -89,33 +86,4 @@ public interface IHost : IDiagnosticHost, ILifecycleHost, IAudioHost, IMovieHost
     void SetAdvPagePresentationSuspended(bool suspended) { }
     void SetAdvPagePresentationSuspended(GfxState gfx, bool suspended)
         => SetAdvPagePresentationSuspended(suspended);
-    void WaitForInput();
-    void WaitForInput(int layoutSlot) => WaitForInput();
-    // Interactive hosts service script callbacks on the VM thread while the enclosing ADV page remains
-    // parked. The callback returns true while another queued input callback is ready to run.
-    void WaitForInput(int layoutSlot, Func<bool> serviceInputCallback)
-    {
-        while (serviceInputCallback()) { }
-        WaitForInput(layoutSlot);
-    }
-    void WaitForInput(int layoutSlot, Func<bool> serviceInputCallback,
-                      Func<AdvAutoWaitState> autoWaitState)
-        => WaitForInput(layoutSlot, serviceInputCallback);
-    void WakeInputCallbackService() { }
-    void InputCallbackCompleted(GfxState gfx) { }
-    // Generic AGE input-callback services (ops 0xcc/0xcd, 0xfb/0xff/0x100, 0x108).
-    // Interactive hosts expose the same monotonic clock used by their frame scheduler.
-    long InputClockMilliseconds => Environment.TickCount64;
-    void SetCursorResource(long resourceId) { }
-    void ClearCursorResource() { }
-    // Native 0x1c7/0x1cc query two distinct ADV skip channels. Headless and non-interactive
-    // hosts default to normal playback; the Godot host supplies the live interactive values.
-    void SetMessageSkipActive(bool active) { }
-    // Logical action 6 is the native hold-to-fast-forward channel. Keep it separate from the
-    // persistent op-0x88 channel so releasing the key cannot turn off the user's Skip toggle.
-    void SetPhysicalMessageSkipActive(bool active) { }
-    bool IsMessageSkipActive => false;
-    // Optional diagnostic override. Native ReadTextDB state is VM/profile-owned; interactive hosts
-    // normally leave this false.
-    bool IsAdvReadSkipActive => false;
 }
diff --git a/engine/Age.Engine/Hosting/IInputHost.cs b/engine/Age.Engine/Hosting/IInputHost.cs
new file mode 100644
index 0000000..db03e0f
--- /dev/null
+++ b/engine/Age.Engine/Hosting/IInputHost.cs
@@ -0,0 +1,49 @@
+using Age.Engine.Model;
+
+namespace Age.Engine.Hosting;
+
+public interface IInputHost
+{
+    /// <summary>Present AGERc's modal full-width editor. Cancel preserves CurrentText.</summary>
+    FullwidthTextEditResult EditFullwidthString(FullwidthTextEditRequest request)
+        => new(false, request.CurrentText);
+
+    void WaitForInput();
+    void WaitForInput(int layoutSlot) => WaitForInput();
+
+    // Interactive hosts service script callbacks on the VM thread while the enclosing ADV page remains
+    // parked. The callback returns true while another queued input callback is ready to run.
+    void WaitForInput(int layoutSlot, Func<bool> serviceInputCallback)
+    {
+        while (serviceInputCallback()) { }
+        WaitForInput(layoutSlot);
+    }
+
+    void WaitForInput(int layoutSlot, Func<bool> serviceInputCallback,
+                      Func<AdvAutoWaitState> autoWaitState)
+        => WaitForInput(layoutSlot, serviceInputCallback);
+
+    void WakeInputCallbackService() { }
+    void InputCallbackCompleted(GfxState gfx) { }
+
+    // Generic AGE input-callback services (ops 0xcc/0xcd, 0xfb/0xff/0x100, 0x108).
+    // Interactive hosts expose the same monotonic clock used by their frame scheduler.
+    long InputClockMilliseconds => Environment.TickCount64;
+
+    void SetCursorResource(long resourceId) { }
+    void ClearCursorResource() { }
+
+    // Native 0x1c7/0x1cc query two distinct ADV skip channels. Headless and non-interactive
+    // hosts default to normal playback; the Godot host supplies the live interactive values.
+    void SetMessageSkipActive(bool active) { }
+
+    // Logical action 6 is the native hold-to-fast-forward channel. Keep it separate from the
+    // persistent op-0x88 channel so releasing the key cannot turn off the user's Skip toggle.
+    void SetPhysicalMessageSkipActive(bool active) { }
+
+    bool IsMessageSkipActive => false;
+
+    // Optional diagnostic override. Native ReadTextDB state is VM/profile-owned; interactive hosts
+    // normally leave this false.
+    bool IsAdvReadSkipActive => false;
+}