diff --git a/docs/PROJECT-STRUCTURE.md b/docs/PROJECT-STRUCTURE.md
index 3e85f4c..a7149b3 100644
--- a/docs/PROJECT-STRUCTURE.md
+++ b/docs/PROJECT-STRUCTURE.md
@@ -166,12 +166,13 @@ reporting contracts, while `engine/Age.Engine/Hosting/ILifecycleHost.cs` owns sc
 timed-deadline waiting, frame yield, and scene reset. `engine/Age.Engine/Hosting/IAudioHost.cs` owns BGM, voice,
 SFX, fade, volume, and route-control contracts, including the compatibility overload/default chains used by
 simple hosts. `engine/Age.Engine/Hosting/IMovieHost.cs` owns ordinary, positioned, mask-transition, activity-query,
-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. `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
+and modal movie playback contracts. `engine/Age.Engine/Hosting/IGraphicsHost.cs` owns mutable surfaces,
+retained-range/frame presentation, transitions, texture lifecycle, pixel capture/replace, draw, and size
+contracts. `engine/Age.Engine/Hosting/IInputHost.cs` owns modal fullwidth entry, ADV waits/callback servicing,
+input clock, cursor resources, and skip-state interaction. `engine/Age.Engine/Hosting/IAdvHost.cs` owns live and
+surface text, history presentation, ADV layout publication, message presentation settings, wait indicators, and
+page-presentation suspension. `IHost` inherits all seven focused contracts; every required member and
+overload/default chain remains 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 3e2808a..04c65ff 100644
--- a/docs/remake-architecture-and-roadmap.md
+++ b/docs/remake-architecture-and-roadmap.md
@@ -809,6 +809,12 @@ do not mix mechanical moves with semantic changes.
    its focused tests required new imports; record shape, editor defaults, wait overloads, and all runtime behavior
    remain unchanged. Runtime validation remains green.
 
+   The tenth bounded contract slice introduced `IAdvHost` for live and surface text, text-history presentation,
+   ADV layout publication, message presentation settings, wait-indicator control, and page-presentation
+   suspension. `IHost` now contains no members of its own and inherits all seven focused host contracts; all
+   twenty-three ADV members, required implementations, overload/default chains, existing hosts, and transport
+   record locations remain behaviorally unchanged. 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
@@ -1169,8 +1175,8 @@ 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 graphics transport neutral, and graphics/input contracts now separated, move
-the remaining ADV text/history/layout/presentation members into `IAdvHost` next. Preserve all required/default
-members and existing hosts, leaving `IHost` as the unchanged aggregate runtime entry point.
+established beneath `IHost`, shared graphics/input transport neutral, and graphics/input/ADV contracts now
+separated, move the unchanged `AdvWaitIndicatorConfig` and `DiagnosticMessage` declarations from `Hosting` to
+`Model` next. Preserve all consumers while removing the remaining transport declarations from interface files.
 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/IAdvHost.cs b/engine/Age.Engine/Hosting/IAdvHost.cs
new file mode 100644
index 0000000..1835a3d
--- /dev/null
+++ b/engine/Age.Engine/Hosting/IAdvHost.cs
@@ -0,0 +1,79 @@
+using Age.Engine.Model;
+
+namespace Age.Engine.Hosting;
+
+public readonly record struct AdvWaitIndicatorConfig(
+    int LayoutSlot, int X, int Y, int SurfaceSlot,
+    int SourceX, int SourceY, int CellWidth, int CellHeight,
+    int TerminalFrame, long FramePeriodMs)
+{
+    /// <summary>Select the current atlas frame. TerminalFrame is the exclusive native upper bound,
+    /// so SYSTEM4's value 12 addresses the twelve cells 0 through 11.</summary>
+    public int FrameAt(long elapsedMs)
+    {
+        int frameCount = System.Math.Max(1, TerminalFrame);
+        long period = System.Math.Max(1, FramePeriodMs);
+        return (int)(System.Math.Max(0, elapsedMs) / period % frameCount);
+    }
+}
+
+public interface IAdvHost
+{
+    void ShowText(int offset, string text);
+    void ShowText(AdvLiveTextRun run, int glyphDelayMilliseconds)
+        => ShowText(run.SourceOffset, run.Text);
+    AdvRetainedTextRunResult? ShowText(
+        GfxState gfx,
+        AdvTextLayoutPresentationBinding binding,
+        AdvLiveTextRun run,
+        int glyphDelayMilliseconds)
+    {
+        ShowText(run, glyphDelayMilliseconds);
+        return null;
+    }
+    int MessageGlyphDelayMilliseconds => 50;
+    void SetMessageGlyphDelayMilliseconds(int milliseconds) { }
+    // Native ADV text subsystem: op 0x7a updates the selected layout's last 20-byte cursor record;
+    // op 0x204 rasterizes a string into a numbered surface before 0x1fb binds that surface.
+    void SetAdvTextCursor(int layoutSlot, int x, int y) { }
+    void DrawStringToSurface(int surfaceSlot, int x, int y, string text) { }
+    void DrawStringToSurface(int surfaceSlot, int x, int y, string text, AdvTextStyle style)
+        => DrawStringToSurface(surfaceSlot, x, y, text);
+    void ClearRenderedAdvTextLayout(int layoutSlot) { }
+    void ResetRenderedAdvTextLayout(
+        GfxState gfx, AdvTextLayoutPresentationBinding binding)
+        => ClearRenderedAdvTextLayout(binding.LayoutSlot);
+    void RenderTextHistory(AdvTextHistoryRenderBatch batch) { }
+    bool RenderTextHistory(
+        GfxState gfx,
+        AdvTextLayoutPresentationBinding binding,
+        AdvTextHistoryRenderBatch batch)
+    {
+        RenderTextHistory(batch);
+        return false;
+    }
+    // History render batches are transient bindings, unlike the retained backlog itself. HISTORY.BIN's
+    // recording re-enable at exit ends that presentation and drops every bound target layout.
+    void EndTextHistoryPresentation() { }
+    void EndTextHistoryPresentation(GfxState gfx) => EndTextHistoryPresentation();
+    int MessageWindowAlphaSetting => 0;
+    void SetMessageWindowAlphaSetting(int value) { }
+    void ConfigureAdvWaitIndicator(AdvWaitIndicatorConfig config) { }
+    // Op 0x212 supplies the ordinary retained handle used to publish the configured atlas cell.
+    void BindAdvWaitIndicator(
+        AdvTextLayoutPresentationBinding binding,
+        AdvTextLayoutSnapshot layout) { }
+    // Op 0x1ce explicitly starts/stops the same animated marker that op 0x72 starts for an ADV wait.
+    void SetAdvWaitIndicatorEnabled(bool enabled) { }
+    // Op 0x20a republishes one retained ADV text layout and includes the current marker frame when active.
+    void PublishAdvTextLayout(int layoutSlot) { }
+    void PublishAdvTextLayout(
+        GfxState gfx, AdvTextLayoutPresentationBinding binding)
+        => PublishAdvTextLayout(binding.LayoutSlot);
+    // Op 0x199 temporarily yields the active ADV page into its registered hide-window coroutine.
+    // The retained scene continues to render, but the text layout and its wait marker are suspended
+    // until op 0x7c restores the saved page PC.
+    void SetAdvPagePresentationSuspended(bool suspended) { }
+    void SetAdvPagePresentationSuspended(GfxState gfx, bool suspended)
+        => SetAdvPagePresentationSuspended(suspended);
+}
diff --git a/engine/Age.Engine/Hosting/IHost.cs b/engine/Age.Engine/Hosting/IHost.cs
index 974a448..5dc52f7 100644
--- a/engine/Age.Engine/Hosting/IHost.cs
+++ b/engine/Age.Engine/Hosting/IHost.cs
@@ -1,82 +1,9 @@
-using Age.Engine.Model;
-
 namespace Age.Engine.Hosting;
 
-public readonly record struct AdvWaitIndicatorConfig(
-    int LayoutSlot, int X, int Y, int SurfaceSlot,
-    int SourceX, int SourceY, int CellWidth, int CellHeight,
-    int TerminalFrame, long FramePeriodMs)
-{
-    /// <summary>Select the current atlas frame. TerminalFrame is the exclusive native upper bound,
-    /// so SYSTEM4's value 12 addresses the twelve cells 0 through 11.</summary>
-    public int FrameAt(long elapsedMs)
-    {
-        int frameCount = System.Math.Max(1, TerminalFrame);
-        long period = System.Math.Max(1, FramePeriodMs);
-        return (int)(System.Math.Max(0, elapsedMs) / period % frameCount);
-    }
-}
-
 /// <summary>A synchronous AGE-owned diagnostic prompt after native body/context formatting.</summary>
 public readonly record struct DiagnosticMessage(string Caption, string Text);
 
-public interface IHost : IDiagnosticHost, ILifecycleHost, IAudioHost, IMovieHost, IGraphicsHost, IInputHost
+public interface IHost : IDiagnosticHost, ILifecycleHost, IAudioHost, IMovieHost, IGraphicsHost, IInputHost,
+                         IAdvHost
 {
-    void ShowText(int offset, string text);
-    void ShowText(AdvLiveTextRun run, int glyphDelayMilliseconds)
-        => ShowText(run.SourceOffset, run.Text);
-    AdvRetainedTextRunResult? ShowText(
-        GfxState gfx,
-        AdvTextLayoutPresentationBinding binding,
-        AdvLiveTextRun run,
-        int glyphDelayMilliseconds)
-    {
-        ShowText(run, glyphDelayMilliseconds);
-        return null;
-    }
-    int MessageGlyphDelayMilliseconds => 50;
-    void SetMessageGlyphDelayMilliseconds(int milliseconds) { }
-    // Native ADV text subsystem: op 0x7a updates the selected layout's last 20-byte cursor record;
-    // op 0x204 rasterizes a string into a numbered surface before 0x1fb binds that surface.
-    void SetAdvTextCursor(int layoutSlot, int x, int y) { }
-    void DrawStringToSurface(int surfaceSlot, int x, int y, string text) { }
-    void DrawStringToSurface(int surfaceSlot, int x, int y, string text, AdvTextStyle style)
-        => DrawStringToSurface(surfaceSlot, x, y, text);
-    void ClearRenderedAdvTextLayout(int layoutSlot) { }
-    void ResetRenderedAdvTextLayout(
-        GfxState gfx, AdvTextLayoutPresentationBinding binding)
-        => ClearRenderedAdvTextLayout(binding.LayoutSlot);
-    void RenderTextHistory(AdvTextHistoryRenderBatch batch) { }
-    bool RenderTextHistory(
-        GfxState gfx,
-        AdvTextLayoutPresentationBinding binding,
-        AdvTextHistoryRenderBatch batch)
-    {
-        RenderTextHistory(batch);
-        return false;
-    }
-    // History render batches are transient bindings, unlike the retained backlog itself. HISTORY.BIN's
-    // recording re-enable at exit ends that presentation and drops every bound target layout.
-    void EndTextHistoryPresentation() { }
-    void EndTextHistoryPresentation(GfxState gfx) => EndTextHistoryPresentation();
-    int MessageWindowAlphaSetting => 0;
-    void SetMessageWindowAlphaSetting(int value) { }
-    void ConfigureAdvWaitIndicator(AdvWaitIndicatorConfig config) { }
-    // Op 0x212 supplies the ordinary retained handle used to publish the configured atlas cell.
-    void BindAdvWaitIndicator(
-        AdvTextLayoutPresentationBinding binding,
-        AdvTextLayoutSnapshot layout) { }
-    // Op 0x1ce explicitly starts/stops the same animated marker that op 0x72 starts for an ADV wait.
-    void SetAdvWaitIndicatorEnabled(bool enabled) { }
-    // Op 0x20a republishes one retained ADV text layout and includes the current marker frame when active.
-    void PublishAdvTextLayout(int layoutSlot) { }
-    void PublishAdvTextLayout(
-        GfxState gfx, AdvTextLayoutPresentationBinding binding)
-        => PublishAdvTextLayout(binding.LayoutSlot);
-    // Op 0x199 temporarily yields the active ADV page into its registered hide-window coroutine.
-    // The retained scene continues to render, but the text layout and its wait marker are suspended
-    // until op 0x7c restores the saved page PC.
-    void SetAdvPagePresentationSuspended(bool suspended) { }
-    void SetAdvPagePresentationSuspended(GfxState gfx, bool suspended)
-        => SetAdvPagePresentationSuspended(suspended);
 }