Guard platform build target matrix

docs/modernization/build-inventory.md

@@ -81,6 +81,7 @@ python scripts/dev/clangd_nav.py symbols --file src/app_core/document_export.h -
 python scripts/dev/clangd_nav.py definition --file src/node_panel_brush.cpp --line 511 --column 39
 python scripts/dev/clangd_nav.py references --file src/app_core/brush_ui.h --line 783 --column 45 --path-regex "src[\\/]app_core"
 python scripts/dev/clangd_nav.py self-test
+python scripts/dev/check_platform_build_targets.py
 ```
 
 Known local toolchain state:
@@ -138,6 +139,10 @@ Known local toolchain state:
   and app status planning. The PowerShell wrapper accepts repeated, array, or
   comma-separated `-Presets`/`-Targets` values so scripted callers can narrow
   the same matrix without accidentally passing a single combined target.
+  `scripts/dev/check_platform_build_targets.py`, registered as
+  `panopainter_platform_build_target_matrix_self_test`, verifies the PowerShell
+  and shell wrapper defaults include every current CMake test executable plus
+  the required component and `pano_cli` targets.
 - Root CMake exposes named `fuzz` and `stress` CTest presets. `fuzz` currently
   runs deterministic parser/serializer edge tests for binary streams, image
   metadata, PPI, stroke scripts, and layout XML; `stress` currently runs the

docs/modernization/debt.md

@@ -22,9 +22,10 @@ agent or engineer to remove them without reconstructing context from chat.
   `platform-build.sh` now include the current headless component/test matrix,
   including brush-package coverage and the app-core startup/file/document/
   brush/canvas/history/grid/toolbar/tools/about/preferences/status automation
-  tests, so Android root CMake validation no longer silently skips newly
-  extracted feature slices. Package targets remain open under DEBT-0009 and
-  DEBT-0011.
+  tests, and `panopainter_platform_build_target_matrix_self_test` now verifies
+  the wrapper defaults against the current CMake test executables, so Android
+  root CMake validation no longer silently skips newly extracted feature
+  slices. Package targets remain open under DEBT-0009 and DEBT-0011.
 - 2026-06-04: DEBT-0036 was narrowed again. Canvas stroke commit,
   thumbnail, and object-draw history paths now query saved blend state through
   tested `pp_renderer_gl` capability-state dispatch; CanvasLayer equirect

docs/modernization/roadmap.md

@@ -1258,7 +1258,9 @@ automation now builds the current headless component matrix, including
 the current app-core startup/file/document/brush/canvas/history/grid/toolbar/
 tools/about/preferences/status automation tests. The PowerShell wrapper also
 normalizes comma-separated `-Presets` and `-Targets` values for reliable
-machine-driven partial matrix checks.
+machine-driven partial matrix checks. `panopainter_platform_build_target_matrix_self_test`
+keeps the PowerShell and shell wrapper defaults aligned with every current
+CMake test executable plus required component targets.
 `package-smoke` now emits a structured package readiness matrix for Windows
 AppX, Android standard/Quest/Focus APKs, Apple bundles, and WebGL output, with
 blocked prerequisites tied to DEBT-0011. App/package entrypoints still need to