Route live reload policy through platform services

docs/modernization/build-inventory.md

@@ -449,7 +449,8 @@ Known local toolchain state:
   virtual-keyboard visibility, external file display, file sharing, native
   app/window close, UI-thread lifecycle hooks, render-context lifecycle hooks,
   render-capture frame hooks, per-frame platform hooks, picker callbacks, and
-  recording cleanup, prepared-file save/download handoff;
+  recording cleanup, live asset/layout reload policy, prepared-file
+  save/download handoff;
   Windows
   live app execution now uses injected
   `WindowsPlatformServices` from

docs/modernization/debt.md

@@ -35,7 +35,7 @@ agent or engineer to remove them without reconstructing context from chat.
 | DEBT-0014 | Open | Modernization | `windows-clangcl-asan` now configures as a headless Ninja/clang-cl preset and uses the release MSVC runtime required by ASan, but local builds still fail because installed clang-cl 18.1.8 is paired with VS 2026-preview STL headers that require Clang 20 or newer | Sanitizer validation should be local and repeatable, but this machine's compiler/header pairing is incompatible | `cmake --fresh --preset windows-clangcl-asan`; `cmake --build --preset windows-clangcl-asan --target pp_foundation` | Install/use Clang 20+ with the VS 2026 STL, or point the preset at a compatible VS 2022 toolchain, then make `platform-build.ps1 -Presets windows-clangcl-asan` pass for the headless matrix |
 | DEBT-0015 | Open | Modernization | Cursor visibility requests now consume pure `pp_app_core` planning through `pano_cli plan-cursor-visibility`, `App::show_cursor`/`App::hide_cursor` dispatch through `PlatformServices` without platform guards, and Windows live execution uses injected `WindowsPlatformServices`, but macOS cursor execution still reaches the retained fallback adapter | Keep canvas cursor behavior stable while platform shells are extracted incrementally | `pp_app_core_document_platform_io_tests`; `pano_cli plan-cursor-visibility --visible`; `ctest --preset desktop-fast --build-config Debug` | Cursor visibility execution is owned by injected `pp_platform_*` services for every supported platform |
 | DEBT-0016 | Open | Modernization | Clipboard get/set requests now consume pure `pp_app_core` planning through `pano_cli plan-clipboard-read` and `pano_cli plan-clipboard-write`, and Windows live execution uses injected `WindowsPlatformServices`, but Apple/Android clipboard execution still reaches retained fallback adapter branches from `App::clipboard_get_text` and `App::clipboard_set_text` | Keep picker/color text clipboard behavior stable while platform shells are extracted incrementally | `pp_app_core_document_platform_io_tests`; `pano_cli plan-clipboard-write --text #ff00aa`; `ctest --preset desktop-fast --build-config Debug` | Clipboard execution is owned by injected `pp_platform_*` services for every supported platform |
-| DEBT-0017 | Open | Modernization | Startup storage path preparation, `App::clipboard_get_text`, `App::clipboard_set_text`, `App::show_cursor`, `App::hide_cursor`, `App::showKeyboard`, `App::hideKeyboard`, `App::display_file`, `App::share_file`, native app/window close, UI-thread lifecycle hooks, render-context acquire/release/present hooks, render-capture frame hooks, recording cleanup, per-frame platform hooks, `App::pick_image`, `App::pick_file`, the non-writer `App::pick_file_save`, `App::pick_dir`, and prepared-file save/download handoff now call the SDK-free `pp::platform::PlatformServices` interface, and Windows injects `WindowsPlatformServices` from `src/platform_windows/windows_platform_services.*`; non-Windows live implementations still use `src/platform_legacy/legacy_platform_services.*`, a named fallback adapter that forwards to retained Apple/Android/Linux/Web bridge functions and retained no-op branches | Preserve behavior while moving platform execution behind a testable service boundary before platform shell implementations are injected | `pp_platform_api_tests`; `pp_app_core_document_platform_io_tests`; `ctest --preset desktop-fast --build-config Debug`; `powershell -ExecutionPolicy Bypass -File scripts\automation\package-smoke.ps1 -Preset windows-msvc-default -Configuration Debug` | Replace `src/platform_legacy/legacy_platform_services.*` with injected `pp_platform_*` service implementations owned by each non-Windows platform shell |
+| DEBT-0017 | Open | Modernization | Startup storage path preparation, `App::clipboard_get_text`, `App::clipboard_set_text`, `App::show_cursor`, `App::hide_cursor`, `App::showKeyboard`, `App::hideKeyboard`, `App::display_file`, `App::share_file`, native app/window close, UI-thread lifecycle hooks, render-context acquire/release/present hooks, render-capture frame hooks, recording cleanup, live asset/layout reload policy, per-frame platform hooks, `App::pick_image`, `App::pick_file`, the non-writer `App::pick_file_save`, `App::pick_dir`, and prepared-file save/download handoff now call the SDK-free `pp::platform::PlatformServices` interface, and Windows injects `WindowsPlatformServices` from `src/platform_windows/windows_platform_services.*`; non-Windows live implementations still use `src/platform_legacy/legacy_platform_services.*`, a named fallback adapter that forwards to retained Apple/Android/Linux/Web bridge functions and retained no-op branches | Preserve behavior while moving platform execution behind a testable service boundary before platform shell implementations are injected | `pp_platform_api_tests`; `pp_app_core_document_platform_io_tests`; `ctest --preset desktop-fast --build-config Debug`; `powershell -ExecutionPolicy Bypass -File scripts\automation\package-smoke.ps1 -Preset windows-msvc-default -Configuration Debug` | Replace `src/platform_legacy/legacy_platform_services.*` with injected `pp_platform_*` service implementations owned by each non-Windows platform shell |
 
 ## Closed Debt
 

docs/modernization/roadmap.md

@@ -472,8 +472,8 @@ before retained platform clipboard bridges continue.
 startup storage path preparation, clipboard text, cursor visibility,
 virtual-keyboard visibility, UI-thread lifecycle hooks, render-context
 acquire/release/present hooks, render-capture frame hooks, external file
-display, file sharing, recording file cleanup, image/file/save-file pickers,
+display, file sharing, recording file cleanup, live asset/layout reload policy,
-and directory pickers.
+image/file/save-file pickers, and directory pickers.
 Windows installs an injected `WindowsPlatformServices` implementation from
 `src/platform_windows/windows_platform_services.*` in `pp_platform_windows`;
 other platforms still route through the debt-tracked legacy fallback adapter
@@ -513,6 +513,9 @@ Recording clear now asks `PlatformServices` whether the platform owns recorded
 file deletion and dispatches the cleanup through the service, preserving the
 current Apple recorded-frame cleanup while removing Apple-specific file cleanup
 guards from `App::rec_clear`.
+The UI loop now asks `PlatformServices` whether live shader/layout reloading
+should run, preserving the previous Windows/macOS reload behavior while removing
+the direct `(_WIN32 || __OSX__)` guard from `App::ui_thread_main`.
 `pano_cli plan-cloud-upload` exposes the app-core cloud upload decision used by
 the live cloud upload command for missing-canvas, new-document warning, publish
 prompt, and dirty-document save-before-upload states before legacy UI, canvas,
@@ -1029,8 +1032,9 @@ Results:
   dispatch, external file display dispatch, file sharing dispatch, native
   app/window close dispatch, UI-thread lifecycle dispatch, render-context
   lifecycle dispatch, render-capture frame hook dispatch, recording cleanup
-  dispatch, per-frame platform hook dispatch, picker callback dispatch, and
+  dispatch, live asset/layout reload policy dispatch, per-frame platform hook
-  prepared-file save/download callback dispatch. The live Windows app now
+  dispatch, picker callback dispatch, and prepared-file save/download callback
+  dispatch. The live Windows app now
   consumes this interface through an injected
   `WindowsPlatformServices` instance isolated in
   `src/platform_windows/windows_platform_services.*`; other platforms still

src/app.cpp

@@ -1014,22 +1014,23 @@ void App::ui_thread_main()
             rendered_frames = 0;
         }
 
-#if /*_DEBUG &&*/ (_WIN32 || __OSX__)
+        if (platform_enables_live_asset_reloading())
-        t_reloader += dt;
-        if (t_reloader > 1.0)
         {
-            t_reloader = 0;
+            t_reloader += dt;
-            if (ShaderManager::reload())
+            if (t_reloader > 1.0)
             {
-                stroke->update_controls();
+                t_reloader = 0;
-                redraw = true;
+                if (ShaderManager::reload())
+                {
+                    stroke->update_controls();
+                    redraw = true;
+                }
+                if (layout.reload())
+                    redraw = true;
+                if (layout_designer.reload())
+                    redraw = true;
             }
-            if (layout.reload())
-                redraw = true;
-            if (layout_designer.reload())
-                redraw = true;
         }
-#endif
 
         tick(dt);
 

src/app.h

@@ -200,6 +200,7 @@ public:
     void end_render_capture_frame();
     [[nodiscard]] bool platform_deletes_recorded_files_on_clear();
     void clear_platform_recorded_files(std::string path);
+    [[nodiscard]] bool platform_enables_live_asset_reloading();
     void update_platform_frame(float delta_time_seconds);
     void report_rendered_frames(int frames);
     void save_prepared_file(

src/app_events.cpp

@@ -269,6 +269,11 @@ void App::clear_platform_recorded_files(std::string path)
     active_platform_services().clear_recorded_files(path);
 }
 
+bool App::platform_enables_live_asset_reloading()
+{
+    return active_platform_services().enables_live_asset_reloading();
+}
+
 void App::update_platform_frame(float delta_time_seconds)
 {
     active_platform_services().update_platform_frame(delta_time_seconds);

src/platform_api/platform_services.h

@@ -35,6 +35,7 @@ public:
     virtual void end_render_capture_frame() = 0;
     [[nodiscard]] virtual bool deletes_recorded_files_on_clear() = 0;
     virtual void clear_recorded_files(std::string_view recording_path) = 0;
+    [[nodiscard]] virtual bool enables_live_asset_reloading() = 0;
     virtual void update_platform_frame(float delta_time_seconds) = 0;
     virtual void report_rendered_frames(int frames) = 0;
     virtual void display_file(std::string_view path) = 0;

src/platform_legacy/legacy_platform_services.cpp

@@ -230,6 +230,15 @@ public:
 #endif
     }
 
+    [[nodiscard]] bool enables_live_asset_reloading() override
+    {
+#if defined(__OSX__)
+        return true;
+#else
+        return false;
+#endif
+    }
+
     void update_platform_frame(float delta_time_seconds) override
     {
         (void)delta_time_seconds;

src/platform_windows/windows_platform_services.cpp

@@ -261,6 +261,11 @@ public:
         (void)recording_path;
     }
 
+    [[nodiscard]] bool enables_live_asset_reloading() override
+    {
+        return true;
+    }
+
     void update_platform_frame(float delta_time_seconds) override
     {
         win32_update_stylus(delta_time_seconds);

tests/platform_api/platform_services_tests.cpp

@@ -93,6 +93,12 @@ public:
         cleared_recording_path.assign(recording_path);
     }
 
+    [[nodiscard]] bool enables_live_asset_reloading() override
+    {
+        ++live_asset_reload_policy_checks;
+        return live_asset_reloading;
+    }
+
     void update_platform_frame(float delta_time_seconds) override
     {
         ++platform_frame_updates;
@@ -173,6 +179,7 @@ public:
     int storage_prepares = 0;
     int recording_delete_policy_checks = 0;
     int recording_clears = 0;
+    int live_asset_reload_policy_checks = 0;
     int platform_frame_updates = 0;
     int frame_reports = 0;
     int display_file_requests = 0;
@@ -187,6 +194,7 @@ public:
     bool keyboard_visible = false;
     bool prepared_file_saved = true;
     bool deletes_recorded_files = true;
+    bool live_asset_reloading = true;
     float last_platform_delta = 0.0f;
     int last_frame_report = 0;
     std::string displayed_path;
@@ -313,6 +321,18 @@ void platform_services_dispatch_recording_cleanup(pp::tests::Harness& harness)
     PP_EXPECT(harness, fake.cleared_recording_path == "D:/Paint/frames");
 }
 
+void platform_services_dispatch_live_asset_reload_policy(pp::tests::Harness& harness)
+{
+    FakePlatformServices fake("unused");
+    pp::platform::PlatformServices& services = fake;
+
+    PP_EXPECT(harness, services.enables_live_asset_reloading());
+    fake.live_asset_reloading = false;
+    PP_EXPECT(harness, !services.enables_live_asset_reloading());
+
+    PP_EXPECT(harness, fake.live_asset_reload_policy_checks == 2);
+}
+
 void platform_services_dispatch_frame_hooks(pp::tests::Harness& harness)
 {
     FakePlatformServices fake("unused");
@@ -404,6 +424,7 @@ int main()
     harness.run("platform services dispatch render context lifecycle", platform_services_dispatch_render_context_lifecycle);
     harness.run("platform services dispatch render capture hooks", platform_services_dispatch_render_capture_hooks);
     harness.run("platform services dispatch recording cleanup", platform_services_dispatch_recording_cleanup);
+    harness.run("platform services dispatch live asset reload policy", platform_services_dispatch_live_asset_reload_policy);
     harness.run("platform services dispatch frame hooks", platform_services_dispatch_frame_hooks);
     harness.run("platform services dispatch file actions", platform_services_dispatch_file_actions);
     harness.run("platform services dispatch picker callbacks", platform_services_dispatch_picker_callbacks);