# Modernization Task Tracker

Status: live
Last updated: 2026-06-13

This file turns the modernization roadmap into small, measurable work items.
The roadmap explains direction, the debt log explains why shortcuts remain, and
this tracker is the execution queue. Prefer closing one task here over adding a
new broad roadmap paragraph.

## Operating Rules

- Pick one `Ready` task at a time unless the user asks for planning only.
- Keep each slice small enough to validate and commit in one session.
- Do not claim percentage progress for "narrowed" debt. Points move only when a
  task row is changed to `Done`.
- A task is `Done` only when its listed checks pass, the debt log is updated or
  closed as applicable, and the roadmap/task score is updated.
- If a task proves too large, split it before editing code. The original task
  stays `Ready` or becomes `Blocked` with the reason.
- After a verified task is committed and pushed, reset conversation context
  before starting the next task when practical.
- When the user asks for subagents or delegation, follow
  `docs/modernization/director-workflow.md` and keep each delegated task mapped
  to a row in this tracker.

## Progress Scorecard

The current score is intentionally conservative. It should move in visible,
auditable steps rather than by subjective estimates.

| Area | Weight | Current | Progress Rule |
| --- | ---: | ---: | --- |
| Build and CMake ownership | 15 | 13 | Root CMake owns active source lists, app/tool targets, and retained package entrypoints. |
| Test and automation coverage | 15 | 9 | Headless, platform, package, and focused validation commands exist and are current. |
| Pure component behavior ownership | 15 | 8 | Behavior lives in `pp_*` components and is consumed by live adapters. |
| Legacy adapter retirement | 20 | 7 | `legacy_*_services` and singleton bridges are deleted or reduced to trivial composition. |
| Renderer boundary and OpenGL parity | 15 | 11 | Live render/export/readback paths execute through renderer interfaces with parity checks. |
| Platform and package parity | 10 | 6 | Required platforms have root CMake/package validation and injected platform services. |
| Hardening and future backend readiness | 10 | 2 | Edge, fuzz, golden, stress, and backend-lab gates exist for high-risk paths. |
| **Total** | **100** | **55** | Only completed tasks below may change this number. |

When updating `Current`, add a dated note under "Completed Task Log" with the
task id, points moved, validation command, and commit hash.

## Task States

| State | Meaning |
| --- | --- |
| `Ready` | Clear enough for an agent to execute. |
| `In progress` | Actively being changed in the current slice. |
| `Blocked` | Needs a user decision, missing toolchain, or a prior task. |
| `Done` | Validated, documented, committed, and pushed. |

## Ready Queue

### MT-001 - Adopt Measurable Task Tracking

Status: Done
Score: no score movement
Debt: none
Scope: `docs/modernization/tasks.md`, `docs/modernization/roadmap.md`

Steps:

- Add this tracker.
- Link it from the roadmap.
- Make the scorecard the source for percentage claims.

Done Checks:

- `docs/modernization/roadmap.md` points agents to this file.
- The tracker has task states, scoring rules, and at least one ready queue.

Validation:

```powershell
git diff -- docs\modernization\roadmap.md docs\modernization\tasks.md
```

### ADP-001 - Remove History Bridge From Document Resize And Canvas Clear

Status: Done
Score: +1 legacy adapter retirement
Debt: `DEBT-0020`, `DEBT-0027`
Scope: `src/legacy_document_canvas_services.*`,
`src/app_core/document_resize.h`, `tests/app_core/document_resize_tests.cpp`,
related canvas-clear tests only

Goal:

Make document resize and canvas-clear execution consume app-core history
commands directly instead of routing through `legacy_history_services`.

Done Checks:

- `src/legacy_document_canvas_services.*` no longer includes
  `legacy_history_services.h`.
- Resize still executes in order: resize, title update, history clear.
- Canvas clear still records undo and marks the document unsaved when a canvas
  exists.
- `docs/modernization/debt.md` narrows or closes the affected removal condition.

Validation:

```powershell
ctest --preset desktop-fast --build-config Debug -R "pp_app_core_document_resize|pp_app_core_document_canvas|pano_cli_plan_document_resize|pano_cli_plan_canvas_clear" --output-on-failure
cmake --build --preset windows-msvc-default --config Debug --target PanoPainter pano_cli
```

### ADP-002 - Remove History Bridge From Layer Operations

Status: Done
Score: +1 legacy adapter retirement
Debt: `DEBT-0021`
Scope: `src/legacy_document_layer_services.*`,
`src/app_core/document_layer.h`, `tests/app_core/document_layer_tests.cpp`

Goal:

Move layer add/remove/merge/clear/rename history side effects into tested
app-core execution plans so the live layer bridge no longer calls
`legacy_history_services`.

Done Checks:

- `src/legacy_document_layer_services.*` no longer includes
  `legacy_history_services.h`.
- Layer operations still preserve undo/history behavior covered by
  `pp_app_core_document_layer_tests`.
- `pano_cli plan-layer-operation`, `plan-layer-menu`, and
  `plan-layer-rename` JSON remains compatible.
- `docs/modernization/debt.md` records the narrowed or closed layer-history
  adapter dependency.

Validation:

```powershell
ctest --preset desktop-fast --build-config Debug -R "pp_app_core_document_layer|pano_cli_plan_layer" --output-on-failure
cmake --build --preset windows-msvc-default --config Debug --target PanoPainter pano_cli
```

### ADP-003 - Remove History Bridge From Document Open And Session Save

Status: Done
Score: +1 legacy adapter retirement
Debt: `DEBT-0039`, `DEBT-0040`, `DEBT-0042`
Scope: `src/legacy_document_open_services.*`,
`src/legacy_document_session_services.*`,
`src/app_core/document_session.*`, `src/app_core/document_route.*`,
matching tests only

Goal:

Make document-open, close, save, save-before-workflow, Save As, and Save Version
history effects explicit app-core outputs instead of direct
`legacy_history_services` calls in the live bridges.

Done Checks:

- `src/legacy_document_open_services.*` and
  `src/legacy_document_session_services.*` no longer include
  `legacy_history_services.h`.
- Existing dirty-document, save-before, new-document, Save As, and Save Version
  plans preserve their JSON contracts.
- The debt log is updated for every debt id listed above.

Validation:

```powershell
ctest --preset desktop-fast --build-config Debug -R "pp_app_core_document_route|pp_app_core_document_session|pano_cli_plan_open_route|pano_cli_simulate_app_session|pano_cli_plan_document_file|pano_cli_plan_document_version" --output-on-failure
cmake --build --preset windows-msvc-default --config Debug --target PanoPainter pano_cli
```

### ADP-004 - Make Dialog Creation A UI Factory Boundary

Status: Done
Score: +2 legacy adapter retirement
Debt: `DEBT-0058`, `DEBT-0063`
Scope: `src/legacy_app_dialog_services.*`,
`src/legacy_ui_overlay_services.*`, `src/app_dialogs.cpp`,
`src/app_core/app_dialog.h`, dialog tests only

Goal:

Keep app-core dialog metadata pure, but move retained
`NodeProgressBar`/`NodeMessageBox`/`NodeInputBox` construction behind one
`pp_panopainter_ui` or retained UI factory function. `App` should ask for a
dialog object through an interface instead of knowing individual node creation
details.

Done Checks:

- `App::show_progress`, `App::message_box`, and `App::input_box` still preserve
  captions, cancel behavior, and keyboard behavior.
- New factory path has focused tests or existing `pp_app_core_app_dialog_tests`
  plus a smoke command proving the live adapter still builds.
- The debt log states exactly which raw-node lifetime hazards remain.

Validation:

```powershell
ctest --preset desktop-fast --build-config Debug -R "pp_app_core_app_dialog|pano_cli_plan_app_dialog" --output-on-failure
cmake --build --preset windows-msvc-default --config Debug --target PanoPainter pano_cli
```

### ADP-005 - Convert One Popup/Dialog Family To Checked Overlay Lifetime

Status: Done
Score: +2 legacy adapter retirement
Debt: `DEBT-0063`
Scope: choose exactly one family from `src/node_dialog_open.cpp`,
`src/node_dialog_browse.cpp`, `src/node_panel_quick.cpp`,
`src/node_panel_stroke.cpp`, or `src/node_combobox.cpp`, plus
`src/legacy_ui_overlay_services.*`

Goal:

Adopt `pp_ui_core` overlay lifetime semantics for one retained popup/dialog
family before trying to rewrite all retained UI nodes.

Done Checks:

- The chosen family no longer owns open-coded root insertion, outside-click
  release, close callback wiring, or destroy-during-callback behavior.
- Existing UI behavior is preserved.
- Tests cover missing root/template handling and close/release behavior for the
  chosen family.
- The debt log names the completed family and the remaining families.

Validation:

```powershell
ctest --preset desktop-fast --build-config Debug -R "pp_ui_core_overlay_lifetime|pp_ui_core_node_lifetime" --output-on-failure
cmake --build --preset windows-msvc-default --config Debug --target PanoPainter
```

### RND-001 - Make Pure Equirectangular Export The Primary Success Path

Status: Done
Score: +2 renderer boundary and OpenGL parity
Debt: `DEBT-0010`, `DEBT-0036`, `DEBT-0043`
Scope: `src/legacy_document_export_services.*`,
`src/app_core/document_export.*`, `src/paint_renderer/compositor.*`,
`tests/app_core/document_export_tests.cpp`,
`tests/paint_renderer/compositor_tests.cpp`

Goal:

For payload-complete snapshots, live PNG/JPEG equirectangular export should
complete through the pure document/paint-renderer writer. Retained
`Canvas::export_equirectangular*` should run only for unsupported Web,
incomplete-readback, or writer-failure fallbacks.

Done Checks:

- Export route reports whether the pure writer was used or why fallback was
  required.
- Tests cover pure-writer success and each fallback reason.
- Live bridge does not call retained equirectangular export after pure-writer
  success.
- The debt log narrows retained equirectangular export execution.

Validation:

```powershell
ctest --preset desktop-fast --build-config Debug -R "pp_app_core_document_export|pp_paint_renderer_compositor|pano_cli_plan_export_snapshot_route|pano_cli_simulate_document_export" --output-on-failure
cmake --build --preset windows-msvc-default --config Debug --target PanoPainter pano_cli
```

### RND-002 - Make Pure Layer And Animation Collection Export Primary

Status: Done
Score: +2 renderer boundary and OpenGL parity
Debt: `DEBT-0010`, `DEBT-0036`, `DEBT-0043`
Scope: `src/legacy_document_export_services.*`,
`src/app_core/document_export.*`, `src/paint_renderer/compositor.*`,
collection export tests only

Goal:

For payload-complete snapshots, live layer and animation-frame collection export
should complete through the pure collection writer. Retained
`Canvas::export_layers*` and `Canvas::export_anim_frames*` should run only for
unsupported Web, incomplete-readback, or writer-failure fallbacks.

Done Checks:

- Collection export route reports pure-writer success versus fallback reason.
- Tests cover layer collection, animation-frame collection, and fallback.
- The debt log narrows retained collection export execution.

Validation:

```powershell
ctest --preset desktop-fast --build-config Debug -R "pp_app_core_document_export|pp_paint_renderer_compositor|pano_cli_plan_export_snapshot_route" --output-on-failure
cmake --build --preset windows-msvc-default --config Debug --target PanoPainter pano_cli
```

### RND-003 - Replace Depth Export Readiness With Pure Depth Export Execution

Status: Done
Score: +3 renderer boundary and OpenGL parity
Debt: `DEBT-0010`, `DEBT-0036`, `DEBT-0043`
Scope: `src/paint_renderer/compositor.*`,
`src/app_core/document_export.*`, `src/legacy_document_export_services.*`,
depth tests only

Goal:

Turn the current pure depth export render plan into actual payload generation
for payload-complete snapshots, then write image/depth payloads through the
existing app-core two-payload writer before falling back to retained
`Canvas::export_depth*`.

Done Checks:

- Pure depth export produces deterministic image and depth payloads for a
  payload-complete snapshot.
- Retained depth export runs only for unsupported targets, incomplete readback,
  or writer failure.
- Tests cover malformed depth target inputs and byte-size validation.
- The debt log narrows depth export readback/execution.

Validation:

```powershell
ctest --preset desktop-fast --build-config Debug -R "pp_app_core_document_export|pp_paint_renderer_compositor|pano_cli_plan_export_snapshot_route" --output-on-failure
cmake --build --preset windows-msvc-default --config Debug --target PanoPainter pano_cli
```

### RND-004 - Add First Desktop GPU Golden Gate

Status: Done
Score: +2 hardening and future backend readiness
Debt: `DEBT-0036`
Scope: `tests/`, `CMakeLists.txt`, renderer test helpers only

Goal:

Create the first non-default `desktop-gpu` golden/readback test that validates
one OpenGL output against a deterministic fixture. Keep it opt-in so headless
agents are not blocked.

Done Checks:

- `ctest --preset desktop-gpu --build-config Debug` has at least one real test.
- The test is skipped with a clear message when no GPU/context is available.
- The roadmap and debt log describe what the golden covers and what remains.

Validation:

```powershell
ctest --preset desktop-gpu --build-config Debug --output-on-failure
ctest --preset desktop-fast --build-config Debug -R "pp_renderer_gl|pp_paint_renderer" --output-on-failure
```

### RND-005 - Add Desktop GPU Preview Golden Gate

Status: Done
Score: +2 hardening and future backend readiness
Debt: `DEBT-0036`
Scope: `tests/`, `CMakeLists.txt`, renderer test helpers only

Goal:

Create the next non-default `desktop-gpu` golden/readback test for the preview
parity lane so the renderer parity coverage is not limited to the existing
clear-readback fixture.

Done Checks:

- `ctest --preset desktop-gpu --build-config Debug` has more than one real GPU
  readback gate.
- The test is skipped with a clear message when no GPU/context is available.
- The roadmap and debt log describe the GPU readback coverage and what remains.

Validation:

```powershell
ctest --preset desktop-gpu --build-config Debug --output-on-failure
ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_compositor|pp_paint_renderer_stroke_execution" --output-on-failure
```

Completed Task Log:

| Date | Task | Score | Validation | Commit |
| --- | --- | ---: | --- | --- |
| 2026-06-13 | RND-005 | +2 hardening and future backend readiness | `ctest --preset desktop-gpu --build-config Debug --output-on-failure`; `ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_compositor|pp_paint_renderer_stroke_execution" --output-on-failure` | `4a44e6cd` |
### RND-006 - Add Desktop GPU Compositor Golden Gate

Status: Done
Score: +2 hardening and future backend readiness
Debt: `DEBT-0036`
Scope: `tests/`, `CMakeLists.txt`, renderer test helpers only

Goal:

Create the next `desktop-gpu` readback gate for the compositor path so the
OpenGL parity lane covers a second live render target, not just the existing
clear/preview fixtures.

Done Checks:

- `ctest --preset desktop-gpu --build-config Debug` has a compositor readback
  gate in addition to the existing GPU fixtures.
- The test is skipped with a clear message when no GPU/context is available.
- The roadmap and debt log describe the compositor output the gate covers and
  what remains.

Validation:

```powershell
ctest --preset desktop-gpu --build-config Debug --output-on-failure
ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_compositor|pp_paint_renderer_stroke_execution" --output-on-failure
```

Completed Task Log:

| Date | Task | Validation | Commit |
| --- | --- | --- | --- |
| 2026-06-13 | RND-006 | `ctest --preset desktop-gpu --build-config Debug --output-on-failure`; `ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_compositor|pp_paint_renderer_stroke_execution" --output-on-failure` | `96b7b6f8` |

### PLT-001 - Split Apple Picker/Browse Service From Legacy Platform Adapter

Status: Done
Score: +2 platform and package parity
Debt: `DEBT-0017`, `DEBT-0051`, `DEBT-0055`
Scope: `src/platform_legacy/legacy_platform_services.*`, new
`src/platform_apple/*` files if needed, `CMakeLists.txt`, platform API tests

Goal:

Move macOS/iOS document browse roots, file picking, directory picking, and
display-path formatting out of the catch-all legacy platform adapter and into a
named Apple platform service boundary.

Done Checks:

- `src/platform_legacy/legacy_platform_services.*` no longer owns Apple
  browse/picker policy.
- Apple compile validation still passes through the remote build script.
- The debt log narrows Apple platform shell extraction.

Validation:

```powershell
ctest --preset desktop-fast --build-config Debug -R pp_platform_api_tests --output-on-failure
powershell -ExecutionPolicy Bypass -File scripts\automation\apple-remote-build.ps1 -Presets macos,ios-simulator,ios-device
```

### PLT-002 - Split Web Export/Storage Policy From Legacy Platform Adapter

Status: Done
Score: +2 platform and package parity
Debt: `DEBT-0050`, `DEBT-0053`, `DEBT-0057`
Scope: `src/platform_legacy/legacy_platform_services.*`, new
`src/platform_web/*` files if needed, `src/platform_api/*`, platform tests

Goal:

Move WebGL exported-image publishing, persistent-storage flushing,
prepared-file handoff, and default canvas resolution out of the catch-all
legacy platform adapter into a named Web platform service boundary.

Done Checks:

- Web policy is injectable through `pp_platform_api`.
- The legacy adapter no longer owns Web default canvas resolution or storage
  flush policy.
- Package-smoke readiness still reports Web blockers explicitly.

Validation:

```powershell
ctest --preset desktop-fast --build-config Debug -R pp_platform_api_tests --output-on-failure
powershell -ExecutionPolicy Bypass -File scripts\automation\package-smoke.ps1 -ReadinessOnly
```

### DEP-001 - Remove Generated fmt Overlay

Status: Done
Score: +1 build and CMake ownership
Debt: `DEBT-0062`
Scope: `CMakeLists.txt`, `cmake/`, `vcpkg.json`, `libs/fmt` or package wiring

Goal:

Use a supported fmt package or update the vendored fmt release so VS 2026 no
longer needs a generated `format.h` overlay.

Done Checks:

- No build-tree fmt header overlay is generated.
- `DEBT-0062` is closed.
- Windows app and at least one focused component test build pass.

Validation:

```powershell
cmake --build --preset windows-msvc-default --config Debug --target PanoPainter pp_platform_api_tests
ctest --preset desktop-fast --build-config Debug -R pp_platform_api_tests --output-on-failure
```

### DEP-002 - Remove Generated nanort Overlay

Status: Done
Score: +1 build and CMake ownership
Debt: `DEBT-0060`
Scope: retained Android package CMake, `libs/nanort`, grid/lightmap dependency
wiring
Goal:

Update, replace, or isolate `nanort` so Android package builds do not generate
a patched vendor overlay.

Done Checks:

- Android retained package CMake no longer generates a patched `nanort.h`.
- `DEBT-0060` is closed.
- Standard Android retained package validation passes.

Validation:

```powershell
powershell -ExecutionPolicy Bypass -File scripts\automation\android-legacy-package-build.ps1 -Packages standard
cmake --build --preset windows-msvc-default --config Debug --target PanoPainter
```

## Blocked Or Later Queue

These are real goals, but they should not be picked until prerequisite tasks
above have reduced risk.

### LATER-001 - Replace OpenVR With OpenXR

Status: Blocked
Score: +3 platform and package parity
Debt: `DEBT-0061`
Blocked By: OpenXR package decision and runtime availability

Done Checks:

- OpenXR SDK/package target exists.
- Windows platform service can start/stop desktop XR without OpenVR.
- `libs/openvr` and `openvr_api.dll` deployment are removed.
- `DEBT-0061` is closed.

### LATER-002 - Remove Catch2 Harness Debt

Status: Blocked
Score: +2 test and automation coverage
Debt: `DEBT-0005`
Blocked By: vcpkg/toolchain reliability across Windows and headless presets

Done Checks:

- Existing local test harness is replaced or permanently justified.
- Catch2 tests run through `desktop-fast` and vcpkg headless presets.
- `DEBT-0005` is closed.

### LATER-003 - Live Stroke Rasterization Through Renderer Services

Status: Ready
Score: +5 renderer boundary and OpenGL parity
Debt: `DEBT-0036`

Done Checks:

- Live stroke rasterization, dual-brush compositing, and pattern feedback choose
  paths through renderer services.
- OpenGL output parity is covered by golden/readback tests.
- Retained stroke OpenGL execution is deleted or isolated as an OpenGL backend
  implementation.

### STR-020 - Extract Stroke Draw Main Pass Texture Dispatch

Status: Done
Score: +1 renderer boundary and OpenGL parity
Debt: `DEBT-0036`
Scope: `src/canvas.cpp`, `src/legacy_canvas_stroke_execution_services.h`, `tests/paint_renderer/compositor_tests.cpp`

Goal:

Move the inline `Canvas::stroke_draw()` main-pass texture dispatch bundle into
a retained helper so the callsite keeps only branch selection plus concrete
texture/sampler wiring.

Done Checks:

- `Canvas::stroke_draw()` no longer builds the main-pass texture dispatch
  bundle inline.
- Regression coverage proves the extracted helper preserves main-pass texture
  callback order.
- `docs/modernization/debt.md` records the reduced stroke-draw texture
  dispatch surface.

Validation:

```powershell
ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_compositor|pp_paint_renderer_stroke_execution" --output-on-failure
```

### Completed Task Log

| Date | Task | Score | Validation | Commit |
| --- | --- | --- | --- | --- |
| 2026-06-13 | STR-020 | +1 renderer boundary and OpenGL parity | `ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_compositor|pp_paint_renderer_stroke_execution" --output-on-failure` | `87e6c111` |

### STR-021 - Extract Stroke Draw Live Pass Sampler Dispatch

Status: Done
Score: +1 renderer boundary and OpenGL parity
Debt: `DEBT-0036`
Scope: `src/canvas.cpp`, `src/legacy_canvas_stroke_execution_services.h`, `tests/paint_renderer/compositor_tests.cpp`

Goal:

Move the inline `Canvas::stroke_draw()` live-pass sampler dispatch bundle into
a retained helper so the callsite keeps only branch selection plus concrete
sampler wiring.

Done Checks:

- `Canvas::stroke_draw()` no longer builds the live-pass sampler dispatch
  bundle inline.
- Regression coverage proves the extracted helper preserves sampler callback
  order.
- `docs/modernization/debt.md` records the reduced live-pass sampler surface.

Validation:

```powershell
ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_compositor|pp_paint_renderer_stroke_execution" --output-on-failure
```

### Completed Task Log

| Date | Task | Score | Validation | Commit |
| --- | --- | --- | --- | --- |
| 2026-06-13 | STR-021 | +1 renderer boundary and OpenGL parity | `ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_compositor|pp_paint_renderer_stroke_execution" --output-on-failure` | `d12b5797` |

### STR-022 - Extract Stroke Draw Dual Brush Tip Dispatch

Status: Ready
Score: +1 renderer boundary and OpenGL parity
Debt: `DEBT-0036`
Scope: `src/canvas.cpp`, `src/legacy_canvas_stroke_execution_services.h`, `tests/paint_renderer/compositor_tests.cpp`

Goal:

Move the inline dual-pass brush-tip dispatch bundle in `Canvas::stroke_draw()`
into a retained helper so the dual-brush branch keeps only concrete texture
object wiring and branch selection.

Done Checks:

- `Canvas::stroke_draw()` no longer builds the dual-pass brush-tip dispatch
  bundle inline.
- Regression coverage proves the extracted helper preserves dual-brush tip
  callback order.
- `docs/modernization/debt.md` records the reduced dual-pass texture-dispatch
  surface.

Validation:

```powershell
ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_compositor|pp_paint_renderer_stroke_execution" --output-on-failure
```

### Completed Task Log

| Date | Task | Score | Validation | Commit |
| --- | --- | --- | --- | --- |
| 2026-06-13 | STR-022 | +1 renderer boundary and OpenGL parity | `ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_compositor|pp_paint_renderer_stroke_execution" --output-on-failure` | `065ddf8e` |

### STR-023 - Extract Stroke Draw Dual Pass Frame Orchestration

Status: Ready
Score: +1 renderer boundary and OpenGL parity
Debt: `DEBT-0036`
Scope: `src/canvas.cpp`, `src/legacy_canvas_stroke_execution_services.h`, `tests/paint_renderer/compositor_tests.cpp`

Goal:

Move the inline `execute_legacy_canvas_stroke_dual_pass_frame_callbacks(...)`
lambda body in `Canvas::stroke_draw()` into a retained helper so the dual-pass
branch owns only concrete shader, sampler, and framebuffer wiring.

Done Checks:

- `Canvas::stroke_draw()` no longer contains the inline dual-pass frame
  callback body.
- Regression coverage proves the extracted helper preserves dual-pass frame
  callback order and face execution.
- `docs/modernization/debt.md` records the reduced dual-pass frame surface.

Validation:

```powershell
ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_compositor|pp_paint_renderer_stroke_execution" --output-on-failure
```

### STR-024 - Extract Stroke Draw Dual Pass Frame Callback Body

Status: Ready
Score: +1 renderer boundary and OpenGL parity
Debt: `DEBT-0036`
Scope: `src/canvas.cpp`, `src/legacy_canvas_stroke_execution_services.h`, `tests/paint_renderer/compositor_tests.cpp`

Goal:

Move the inline body passed to `execute_legacy_canvas_stroke_dual_pass_frame_callbacks(...)`
into a retained helper so the dual-pass branch owns only concrete callback
selection and framebuffer wiring.

Done Checks:

- `Canvas::stroke_draw()` no longer contains the inline dual-pass frame
  callback body.
- Regression coverage proves the extracted helper preserves callback order and
  face-state updates.
- `docs/modernization/debt.md` records the reduced dual-pass frame-callback
  surface.

Validation:

```powershell
ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_compositor|pp_paint_renderer_stroke_execution" --output-on-failure
```

Progress Notes:

- 2026-06-13: `NodeStrokePreview::draw_stroke_immediate()` now routes final
  composite execution and preview copy-back through a retained local wrapper,
  leaving the call site with only sequence wiring.
- 2026-06-13: `Canvas::stroke_draw()` now routes dual-brush tip dispatch
  through retained helper overloads, so the face-index callback wiring is no
  longer built inline in the dual-pass branch.
- 2026-06-13: `Canvas::stroke_draw()` now routes pad destination texture
  dispatch through retained helper overloads, so the face-index callback
  wiring is no longer built inline in the pad branch.
- 2026-06-13: `Canvas::stroke_draw()` now routes its main live-pass bind,
  execute, and unbind sequence through
  `execute_legacy_canvas_stroke_main_pass(...)`; the retained adapter still
  owns the concrete sampler and texture callbacks.
- 2026-06-13: `Canvas::stroke_draw_mix()` now routes retained mix-pass request
  wiring through `make_legacy_canvas_stroke_mix_pass_request(...)`; the legacy
  path still owns the concrete framebuffer setup and per-plane GL callbacks.
- 2026-06-13: `Canvas::stroke_draw_mix()` now routes its retained mix-pass
  execution shell through `execute_legacy_canvas_stroke_mix_pass_with_setup(...)`
  with a concrete request builder; the live path still owns the OpenGL setup
  and per-plane texture wiring.
- 2026-06-13: `Canvas::stroke_draw_mix()` now routes the setup/end shell through
  `make_legacy_canvas_stroke_mix_pass_setup(...)`; the live path still owns the
  concrete framebuffer bind and GL capability toggles.
- 2026-06-13: `Canvas::stroke_draw_mix()` now routes the full retained mix-pass
  shell through `execute_legacy_canvas_stroke_mix_pass_with_setup(...)`; the
  live path still owns the concrete framebuffer bind and GL capability toggles.
- 2026-06-13: `Canvas::stroke_draw_mix()` now routes the retained mix-pass
  shell through `execute_legacy_canvas_stroke_mix_pass_shell(...)`; the live
  path still owns the concrete framebuffer bind and GL capability toggles.
- 2026-06-13: `Canvas::stroke_draw_mix()` now routes the combined setup and
  request bundle through `make_legacy_canvas_stroke_mix_pass_shell(...)`; the
  live path still owns the concrete framebuffer bind and GL capability
  toggles.
- 2026-06-13: `Canvas::stroke_draw_mix()` now routes the combined setup,
  request bundle, and shell execution through
  `make_legacy_canvas_stroke_mix_pass_shell(...)` plus
  `execute_legacy_canvas_stroke_mix_pass_shell(...)`; the live path still
  owns the concrete framebuffer bind and GL capability toggles.
- 2026-06-13: `Canvas::stroke_draw()` live-pass sampler wiring now reuses a
  retained helper builder, and the stroke execution tests cover it. `STR-004`
  is now done after the final pad-destination helper extraction and tracker
  closeout.
- 2026-06-13: `STR-004` closed the last inline stroke dispatch glue. `LATER-003`
  remains at the binding-only tail.
- 2026-06-13: `Canvas::stroke_draw_mix()` now routes the retained shell
  execution through a local wrapper around
  `execute_legacy_canvas_stroke_mix_pass_shell(...)`; the live path still owns
  the concrete mixer framebuffer setup and GL capability toggles.
- 2026-06-13: `Canvas::stroke_draw_mix()` now calls the retained mix-pass
  executor directly instead of a local wrapper shell helper; the live path
  still owns the concrete mixer framebuffer setup and GL capability toggles.
- 2026-06-13: `Canvas::stroke_draw_mix()` now routes the remaining mixer
  framebuffer/capability shell through a local helper, leaving the call site
  with only mix-pass planning and helper invocation.
- 2026-06-13: `retained_stroke_mix_pass_shell_builder_preserves_combined_wiring`
  now also exercises the direct shell executor path, locking the combined mix
  shell boundary with call-order regression coverage.
- 2026-06-13: `retained_stroke_mix_pass_shell_executor_preserves_combined_wiring`
  now covers the direct shell executor path separately, keeping the shell
  boundary regression isolated from the builder coverage.
- 2026-06-13: `Canvas::stroke_draw_mix()` no longer computes an unused mix-plane
  plan in the live shell path; the remaining code is the retained shell setup
  and executor call.
- 2026-06-13: `Canvas::stroke_draw_mix()` now routes the remaining framebuffer
  setup callbacks through a local helper, leaving the method with only shell
  assembly and executor dispatch.
- 2026-06-13: `Canvas::stroke_draw_mix()` now keeps just the retained shell
  assembly and executor dispatch at the callsite; the framebuffer setup
  callbacks are isolated in the helper.
- 2026-06-13: `Canvas::stroke_commit()` now routes the large retained callback
  bundle through a local helper, leaving the callsite with sequence planning
  and helper invocation.
- 2026-06-13: `Canvas::stroke_commit()` now keeps the commit callback bundle
  in a local helper, leaving the callsite with sequence planning and retained
  callback invocation only.
- 2026-06-13: `Canvas::stroke_commit()` now routes the commit-input texture
  role switch through a local helper, so the callsite no longer owns that
  inline texture binding bundle.
- 2026-06-13: `Canvas::stroke_commit()` now routes the commit-input texture
  role switch through a retained service helper, so the callsite only supplies
  concrete face bindings.
- 2026-06-13: `Canvas::stroke_draw_samples()` now reuses a retained destination
  texture dispatch helper for the live sample path; `Canvas` still owns the
  concrete face textures and callback execution.
- 2026-06-13: `pp_paint_renderer_stroke_execution_tests` now also covers the
  new retained main-pass texture dispatch helper builder and its pattern/mixer
  wiring. Next slice should target another narrow `stroke_draw()` seam or stop
  once the remaining inline code is just trivial binding glue.
- 2026-06-13: `pp_paint_renderer_stroke_execution_tests` now covers the new
  retained sampler dispatch helper builder and its pattern bind/unbind wiring.
  Next slice should target another narrow `stroke_draw()` seam or another
  helper-builder regression without reopening landed texture or dual-pass
  helpers.
- 2026-06-13: `Canvas::stroke_draw()` live-pass sampler dispatch now reuses a
  retained helper builder for brush-tip, destination, pattern, and mixer
  sampler callbacks; the live adapter still owns the concrete sampler objects.
  Next slice should target another narrow `stroke_draw()` seam without
  reopening landed texture or dual-pass helpers.
- 2026-06-13: `Canvas::stroke_draw()` main-pass texture dispatch now reuses
  retained helper builders for texture-unit, brush-tip, pattern, and mixer
  callback wiring; the live adapter still owns the concrete textures and
  sampler state. Next slice should target the remaining inline `stroke_draw()`
  dispatch construction or another narrow seam without reopening landed pad or
  dual-pass helpers.
- 2026-06-13: `Canvas::stroke_draw()` dual-brush replay now reuses the new
  retained brush-tip texture dispatch helper for binding and unbinding; the
  live adapter still owns the concrete brush texture object and live-pass
  execution. Next slice should target another narrow `stroke_draw()` seam
  without reopening landed pad or sample helpers.
- 2026-06-13: `Canvas::stroke_draw()` dual-brush replay now routes shader
  setup, brush-tip texture binding, live-pass execution, and brush-tip
  unbinding through `execute_legacy_canvas_stroke_dual_pass(...)`; the live
  adapter still owns the concrete texture callbacks and face-frame replay.
  Next slice should target another narrow `stroke_draw()` seam without
  reopening landed pad or sample helpers.
- 2026-06-13: `Canvas::stroke_draw()` now routes the pad-stroke destination
  texture dispatch through a local helper lambda, so the repeated bind/unbind
  callback construction is centralized while the pad executor still owns the
  face loop and copy timing. Next slice should target another narrow canvas
  stroke execution seam without reopening landed pad or sample helpers.
- 2026-06-13: `Canvas::stroke_draw_mix()` now routes mix-pass plane planning
  through `plan_legacy_canvas_stroke_mix_pass_planes(...)` and wraps retained
  framebuffer setup/teardown with
  `execute_legacy_canvas_stroke_mix_pass_with_setup(...)`; the live adapter
  still owns concrete sampler, texture, and draw callbacks. `pp_paint_renderer_stroke_execution_tests`
  now covers the default dirty-union path for live-pass face-framebuffer
  execution. Next slice should target the remaining Canvas stroke execution
  seam without reopening the landed mix-pass setup helper.
- 2026-06-13: `Canvas::draw_merge()` now routes per-plane merge-target clear,
  blend-state gating, and optional checkerboard prepass through
  `execute_legacy_canvas_draw_merge_plane_setup(...)`; per-layer iteration,
  temporary-stroke branches, and concrete framebuffer ownership remain local to
  `Canvas`. Next slice should target another narrow draw-merge execution seam
  without reopening landed plane-setup, temporary-composite, layer-blend,
  final-plane, or texture-alpha helpers.
- 2026-06-13: `Canvas::draw_merge()` now routes the standard per-layer
  texture-alpha pass through
  `execute_legacy_canvas_draw_merge_layer_texture(...)`; temporary-stroke
  branches, per-plane iteration, and concrete RTT ownership remain local to
  `Canvas`. Next slice should target another narrow draw-merge execution seam
  without reopening landed temporary-composite, layer-blend, final-plane, or
  texture-alpha helpers.
- 2026-06-13: `Canvas::draw_merge()` temporary composite setup now routes
  through `execute_canvas_draw_merge_temporary_composite(...)`; the retained
  path still owns the concrete setup, sampler, texture, draw, and unbind
  callbacks. Next slice should target another narrow draw-merge seam without
  reopening the landed temporary-composite helper.
- 2026-06-13: `Canvas::draw_merge()` temporary erase and paint branch wiring
  now routes through `execute_legacy_canvas_draw_merge_temporary_composite(...)`;
  the retained path still owns the concrete setup, sampler, texture, draw, and
  unbind callbacks. Next slice should target another narrow draw-merge seam
  without reopening the landed temporary-composite helper.
- 2026-06-13: `Canvas::draw_merge()` now routes the remaining temporary erase
  and paint callback bundle through
  `execute_legacy_canvas_draw_merge_temporary_composite(...)`; only the
  branch selection remains inline. Next slice should target another narrow
  draw-merge seam without reopening the landed temporary-composite helper.
- 2026-06-13: `Canvas::draw_merge()` now routes the layer-composite shell
  through a local wrapper around
  `execute_legacy_canvas_draw_merge_layer_composite(...)`; only the final
  branch selection remains inline. Next slice should target another narrow
  draw-merge seam without reopening the landed temporary-composite helper.
- 2026-06-13: `Canvas::draw_merge()` now routes the layer texture, layer blend,
  and final-plane composite callbacks through local wrappers around the
  retained helpers; the remaining work in this lane is now just branch
  selection glue.
- 2026-06-13: `pp_paint_renderer_stroke_execution_tests` now also covers
  retained frame-plan assembly for previous-sample projection mode and zoom
  scaling. Next slice should target the remaining preview/Canvas stroke
  execution seam or another narrow renderer boundary without reopening the
  landed stroke-frame planner coverage.
- 2026-06-13: `NodeStrokePreview` live-pass orchestration now routes through
  `execute_legacy_stroke_preview_live_pass(...)`, and
  `pp_paint_renderer_stroke_execution_tests` now covers live-pass clear,
  traversal, and final copy ordering. Next slice should target the remaining
  preview or Canvas stroke execution seam without reopening the landed live-pass
  helper.
- 2026-06-13: `NodeStrokePreview::draw_stroke_immediate()` now routes retained
  preview feedback/material/composite planning plus stroke-shader uniform
  assembly through `plan_legacy_node_stroke_preview_pass_orchestration(...)`;
  compositor coverage now locks destination-feedback fallback, composite-slot
  intent, and the retained pattern/dual shader-uniform handoff. The preview
  node still owns brush object mutation, retained `Stroke` population, and the
  concrete GL pass callbacks. Next slice should target another narrow preview
  execution seam without reopening the landed preview setup, mix, pass-sequence,
  or final-composite helpers.
- 2026-06-13: `NodeStrokePreview::draw_stroke_immediate()` now routes preview
  stroke max-size fallback, dual-preview max-size derivation, pattern-scale
  flips, and Bezier preview-point generation through
  `plan_legacy_node_stroke_preview_stroke_setup(...)`; compositor coverage now
  also locks the retained stroke-setup curve/pressure intent and
  pass-sequence request-validation short-circuit behavior. The preview node
  still owns brush object mutation, camera wiring, retained `Stroke`
  population, and live GL execution. Next slice should target the remaining
  higher-level preview pass orchestration seam without reopening landed
  sample, mix, pass-sequence, or final-composite helpers.
- 2026-06-13: `Canvas::draw_merge()` per-layer blend composite now routes
  merge-RTT unbind, shader setup, optional destination-copy feedback, draw,
  and cleanup ordering through
  `execute_legacy_canvas_draw_merge_layer_blend(...)`; temporary-stroke
  branch selection, layer iteration, and final merged-plane redraw ownership
  remain local to `Canvas`. Next slice should target the remaining end-of-plane
  merged-texture copy/grid/final-redraw seam or another similarly narrow final
  composite boundary without reopening landed temporary-composite or
  per-layer blend helpers.
- 2026-06-13: `Canvas::draw_merge()` end-of-plane merged-texture copy,
  optional checkerboard redraw, and final merged-texture composite ordering now
  route through `execute_legacy_canvas_draw_merge_final_plane_composite(...)`;
  per-plane iteration and concrete framebuffer, sampler, texture, and draw
  callbacks remain local to `Canvas`. Next slice should target another narrow
  retained draw-merge boundary without reopening landed temporary-composite,
  layer-blend, or final-plane helpers.
- 2026-06-13: `Canvas::draw_merge()` erase live temporary-stroke composite now
  routes retained setup, sampler bind, texture bind, draw, and texture unbind
  ordering through `execute_legacy_canvas_stroke_temporary_composite(...)`;
  both live temporary composite branches now share the same retained execution
  helper while `Canvas` keeps only concrete GL object callbacks and broader
  final composite ownership. Next slice should target the remaining final
  composite seam without reopening landed sample, mix, dirty, or framebuffer
  helpers.
- 2026-06-13: `NodeStrokePreview::stroke_draw_mix()` now routes retained
  mix-pass shader setup plus framebuffer/state/input/draw ordering through
  `execute_legacy_node_stroke_preview_mix_pass(...)`, with compositor coverage
  locking the retained callback order and shader-plan handoff. The preview node
  keeps only the concrete GL save/restore, texture-object bind, and plane-draw
  callbacks. Next slice should target another retained preview or canvas stroke
  seam without reopening the landed preview sample, material-planning,
  pass-sequence, or final-composite helpers.
- 2026-06-13: `NodeStrokePreview::draw_stroke_immediate()` now routes
  dual-pass/background/main-pass/final-composite/copy-back ordering through
  `execute_legacy_node_stroke_preview_pass_sequence(...)`; the remaining local
  preview ownership is concentrated around `stroke_draw_mix()` setup/execution.
  Next slice should target that final mix-pass setup/execution seam without
  reopening landed sample, binding, material-planning, or final-composite
  helpers.
- 2026-06-13: `Canvas::draw_merge()` non-erase live temporary-stroke
  composite ordering now routes through
  `execute_legacy_canvas_stroke_temporary_composite(...)`; erase-path and
  broader final composite ownership still remain local to `Canvas`. Next slice
  should target the erase temporary composite branch or another similarly
  narrow final composite seam without reopening landed sample, mix, dirty, or
  framebuffer helpers.
- 2026-06-13: `Canvas::draw_merge()` temporary paint branch execution now
  routes through `make_legacy_canvas_draw_merge_temporary_paint_composite(...)`;
  the live path still owns the concrete layer RTT, mixer RTT, sampler, and
  plane callbacks.
- 2026-06-13: `Canvas::stroke_draw_samples()` now routes face-indexed
  destination bind/copy/unbind and brush upload/draw through
  `execute_legacy_canvas_stroke_face_sample_polygon(...)`; the retained sample
  executor now owns the face-aware dispatch contract while `Canvas` keeps only
  the concrete GL object callbacks. Next slice should target any remaining
  final temporary-texture composite setup without reopening landed sample,
  mix, sampler, dirty, face, or pad helpers.
- 2026-06-13: `pp_paint_renderer_stroke_execution_tests` now also covers
  direct retained frame-sample callback ordering plus
  `execute_legacy_canvas_stroke_frame_samples_with_dirty_tracking(...)`
  timing/state semantics, including pre-update dirty visibility and
  `previous_pass_dirty_box` override behavior. Next test slice should target
  the next header-level preview live sample ordering surface without reopening
  production files.
- 2026-06-13: `Canvas::stroke_draw_mix()` now routes visible-plane filtering,
  retained sampler/texture-slot binding, and final plane draw ordering through
  `execute_legacy_canvas_stroke_mix_pass(...)`; mixer framebuffer/state setup
  and per-plane shader material/MVP preparation remain local to `Canvas`. Next
  slice should target the remaining `stroke_draw_samples()` callback body or
  any final temporary-texture composite setup without reopening landed
  sample, sampler, dirty, face, or pad helpers.

### STR-019 - Extract Stroke Draw Mix Mixer State And Copy Ordering

Status: Done
Score: +1 renderer boundary and OpenGL parity
Debt: `DEBT-0036`
Scope: `src/canvas.cpp`, `src/legacy_canvas_stroke_execution_services.h`, `tests/paint_renderer/compositor_tests.cpp`

Goal:

Move the remaining `stroke_draw_mix()` mixer-framebuffer state and copy-order
callbacks into a retained helper so `Canvas::stroke_draw_mix()` keeps only
branch selection plus concrete GL object wiring.

Done Checks:

- `Canvas::stroke_draw_mix()` no longer owns the remaining mixer framebuffer
  state and copy ordering inline.
- Regression coverage proves the extracted helper preserves the mixer-state
  callback order.
- `docs/modernization/debt.md` records the reduced stroke-mix shell surface.

Validation:

```powershell
ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_compositor|pp_paint_renderer_stroke_execution" --output-on-failure
```

### Completed Task Log

| Date | Task | Score | Validation | Commit |
| --- | --- | --- | --- | --- |
| 2026-06-13 | STR-019 | +1 renderer boundary and OpenGL parity | `ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_compositor|pp_paint_renderer_stroke_execution" --output-on-failure` | `e7d96bfd` |

- 2026-06-13: `pp_paint_renderer_stroke_execution_tests` now also covers
  retained preview background capture ordering, final composite ordering, and
  preview texture-copy bind-before-copy behavior via
  `legacy_canvas_stroke_preview_services.h`. Next test slice should target the
  next header-level preview live sample or mix-pass ordering surface without
  reopening production files.
- 2026-06-13: `Canvas::stroke_draw_samples()` now routes polygon
  triangulation, sample-point assembly, and the retained destination-copy /
  upload / draw helper handoff through
  `execute_legacy_canvas_stroke_sample_polygon(...)`; direct GL callback
  wiring and the remaining live draw ownership stay local to `Canvas`. Next
  slice should target the remaining callback body or final temporary-texture
  composite setup without reopening the landed sampler, dirty, face, or pad
  helpers.
- 2026-06-13: `NodeStrokePreview::stroke_draw_mix()` now routes mixer
  framebuffer bind/unbind, viewport/scissor/blend state, texture-slot binding,
  and final plane draw through one local helper; material planning and shader
  uniform setup remain local to the preview node. Next slice should target the
  remaining mix-pass material/setup orchestration without reopening the landed
  preview live-pass, binding, sample, or final composite helpers.
- 2026-06-13: `NodeStrokePreview::stroke_draw_mix()` now routes retained
  mix-pass material planning plus composite/pattern/dual uniform payload
  assembly through `plan_legacy_node_stroke_preview_mix_pass(...)`, with
  compositor coverage locking the retained preview mix adapter semantics for
  composite-pass patterning and dual state. Mixer framebuffer ownership,
  retained shader execution, texture binding, and final draw/copy ordering
  remain local to the preview node. Next slice should target the remaining
  mix-pass execution ownership without reopening the landed preview live-pass,
  binding, sample, or final composite helpers.
- 2026-06-13: `pp_paint_renderer_stroke_execution_tests` now also covers
  retained texture-dispatch activation order and sampler-dispatch routing
  across brush tip, destination, pattern, and mixer helper inputs. Next test
  slice should extend the dedicated lane into frame-sample loop ordering or
  preview-side retained helper coverage.
- 2026-06-13: Added `pp_paint_renderer_stroke_execution_tests` as a dedicated
  retained stroke execution-helper target covering texture-input binding order,
  sample destination-copy behavior, live-pass face-framebuffer dirty tracking,
  and pad-face destination-copy behavior. Next test slice should extend this
  target toward the newer sampler-dispatch helpers or preview-side retained
  execution helpers.
- 2026-06-13: `Canvas::stroke_draw` live-pass sampler bind/unbind plus
  semantic texture-input dispatch now routes through retained stroke execution
  helpers; concrete GL object mapping, framebuffer ownership, shader timing,
  and final draw execution remain local to `Canvas`. Next slice should target
  the remaining live draw execution boundary inside `stroke_draw_samples()` or
  the final temporary-texture composite setup without reopening the landed
  dirty, face-framebuffer, pad, or texture-intent helpers.
- 2026-06-13: `NodeStrokePreview::stroke_draw_samples()` now routes
  destination bind/unbind, framebuffer copy callback wrapping, sample-point
  assembly, and brush-vertex upload/draw through one local helper; mixer-pass
  state execution and higher-level pass orchestration remain local to the
  preview node. Next slice should target the remaining mixer-pass state/copy
  ordering without reopening the landed preview live-pass, binding, or final
  composite helpers.
- 2026-06-13: `Canvas::stroke_draw` main, pad, and dual live-pass
  texture-input binding/unbinding intent now routes through retained stroke
  execution helpers; sampler binding, concrete GL object mapping, framebuffer
  ownership, and final draw execution remain local to `Canvas`. Next slice
  should target the remaining sampler binding/teardown or the direct
  semantic-input-to-GL mapping callbacks without reopening the landed dirty,
  face-framebuffer, or pad helpers.
- 2026-06-13: `NodeStrokePreview::draw_stroke_immediate()` live-pass sampler
  binding, dual/main pass texture binding, checkerboard/background capture
  wrapping, and final preview copy-back now route through named local helpers;
  mixer state execution and per-sample GL ordering remain local to the preview
  node. Next slice should target the remaining mixer-pass state/copy ordering
  or sample-pass destination callback wrapping without reopening the landed
  preview live-pass or final-composite helpers.
- 2026-06-13: `NodeStrokePreview::draw_stroke_immediate()` dual-pass and
  main-pass frame-loop execution plus full-frame copy-back now route through
  shared local helpers; checkerboard/background capture ordering, texture-unit
  binding, mixer ownership, and final composite semantics remain local to the
  preview node. Next slice should target background/final-copy helpers or
  pass-level texture binding without reopening the new preview composite
  helper.
- 2026-06-13: `Canvas::stroke_draw` main and dual live-pass per-face
  framebuffer begin/end execution plus pad-face array assembly now route
  through `legacy_canvas_stroke_execution_services.h`; shader activation
  timing, texture/sampler binding, framebuffer ownership, and final draw
  execution remain local to `Canvas`. Next slice should target the remaining
  pass-level texture binding or final composite setup without reopening the
  newer pad, dirty, or commit helpers.
- 2026-06-13: `Canvas::stroke_draw` current and dual stroke per-face
  framebuffer/sample callback ordering now routes through
  `legacy_canvas_stroke_execution_services.h`; framebuffer ownership, shader
  uniform timing, sampler/texture binding, and draw execution remain local to
  Canvas. Next slice should target the remaining per-face retained state around
  sample execution without reopening the new pad-pass, dirty-mutation, or
  commit executors.
- 2026-06-13: `Canvas::stroke_draw` current and dual stroke dirty-box mutation
  now routes through `legacy_canvas_stroke_execution_services.h`; framebuffer
  binding, shader uniform timing, sampler/texture binding, and draw execution
  remain local to Canvas. Next slice should wrap the retained per-face
  framebuffer/sample callback ordering without rewriting the new pad-pass or
  commit executors.
- 2026-06-13: `Canvas::stroke_commit` now routes retained commit input
  texture/sampler binding, erase/composite draw dispatch, committed-copy, and
  dilate draw through `legacy_canvas_stroke_commit_services.h`; history
  readback, `ActionStroke` population, and layer dirty-box mutation remain
  local to Canvas.
- 2026-06-13: `pp_paint_renderer` owns tested Canvas stroke commit sequencing
  and commit texture slot intent. Next slice should wire
  `legacy_canvas_stroke_commit_services.h` into `Canvas::stroke_commit` while
  keeping history/layer mutation local.

### LATER-004 - Remove Catch-All Platform Legacy Adapter

Status: Blocked
Score: +5 platform and package parity
Debt: `DEBT-0017`
Blocked By: Apple/Web split tasks and per-platform package validation

Done Checks:

- `src/platform_legacy/legacy_platform_services.*` is deleted or contains only
  compile-time unsupported stubs with debt entries.
- Windows, Apple, Android, Linux, and Web platform services are named targets.
- Platform-build and package-smoke report explicit pass/fail per platform.

## Completed Task Log

| Date | Task | Score Change | Validation | Commit |
| --- | --- | ---: | --- | --- |
| 2026-06-12 | RND-004 | +2 hardening and future backend readiness | `ctest --preset desktop-gpu --build-config Debug --output-on-failure`; `ctest --preset desktop-fast --build-config Debug -R "pp_renderer_gl\|pp_paint_renderer" --output-on-failure` | e37b2929 |
| 2026-06-12 | DEP-002 | +1 build and CMake ownership | `powershell -ExecutionPolicy Bypass -File scripts\automation\android-legacy-package-build.ps1 -Packages standard` | 648404ee |
| 2026-06-12 | RND-002 | +2 renderer boundary and OpenGL parity | `ctest --preset desktop-fast --build-config Debug -R "pp_app_core_document_export\|pp_paint_renderer_compositor\|pano_cli_plan_export_snapshot_route\|pano_cli_simulate_document_export" --output-on-failure` | 46fb8ef |
| 2026-06-12 | RND-001 | +2 renderer boundary and OpenGL parity | `ctest --preset desktop-fast --build-config Debug -R "pp_app_core_document_export\|pp_paint_renderer_compositor\|pano_cli_plan_export_snapshot_route\|pano_cli_simulate_document_export" --output-on-failure` | 46fb8ef |
| 2026-06-12 | ADP-004 | +2 legacy adapter retirement | VS-bundled CMake build of `pp_app_core_app_dialog_tests` and `pano_cli`; `ctest --preset desktop-fast --build-config Debug -R "pp_app_core_app_dialog\|pano_cli_plan_app_dialog" --output-on-failure` | 46fb8ef |
| 2026-06-12 | PLT-001 | +2 platform and package parity | VS-bundled CMake build of `pp_platform_api_tests`; `ctest --preset desktop-fast --build-config Debug -R pp_platform_api_tests --output-on-failure`; Apple remote build blocked by unpublished fmt submodule pointer before DEP-001 correction | 46fb8ef |
| 2026-06-12 | RND-003 | +3 renderer boundary and OpenGL parity | VS-bundled CMake build of `pp_paint_renderer_compositor_tests`, `pp_app_core_document_export_tests`, and `pano_cli`; `ctest --preset desktop-fast --build-config Debug -R "pp_app_core_document_export\|pp_paint_renderer_compositor\|pano_cli_plan_export_snapshot_route" --output-on-failure` | 46fb8ef |
| 2026-06-12 | DEP-001 | +1 build and CMake ownership | VS-bundled CMake build of `PanoPainter` and `pp_platform_api_tests`; `ctest --preset desktop-fast --build-config Debug -R pp_platform_api_tests --output-on-failure` | 46fb8ef |
| 2026-06-12 | ADP-003 | +1 legacy adapter retirement | `ctest --preset desktop-fast --build-config Debug -R "pp_app_core_document_route\|pp_app_core_document_session\|pano_cli_plan_open_route\|pano_cli_simulate_app_session\|pano_cli_plan_document_file\|pano_cli_plan_document_version" --output-on-failure` | 34a9e910 |
| 2026-06-12 | PLT-002 | +2 platform and package parity | `ctest --preset desktop-fast --build-config Debug -R pp_platform_api_tests --output-on-failure`; `powershell -ExecutionPolicy Bypass -File scripts\automation\package-smoke.ps1 -ReadinessOnly`; `ctest --preset desktop-fast --build-config Debug -R "pp_app_core_document_layer\|pano_cli_plan_layer\|pp_platform_api_tests" --output-on-failure` | 8cd38401 |
| 2026-06-12 | ADP-002 | +1 legacy adapter retirement | `ctest --preset desktop-fast --build-config Debug -R "pp_app_core_document_layer\|pano_cli_plan_layer" --output-on-failure`; `ctest --preset desktop-fast --build-config Debug -R "pp_app_core_document_layer\|pano_cli_plan_layer\|pp_platform_api_tests" --output-on-failure` | ae242852 |
| 2026-06-12 | ADP-001 | +1 legacy adapter retirement | `ctest --preset desktop-fast --build-config Debug -R "pp_app_core_document_resize\|pp_app_core_document_canvas\|pano_cli_plan_document_resize\|pano_cli_plan_canvas_clear" --output-on-failure`; `powershell -ExecutionPolicy Bypass -File scripts\automation\quiet-validate.ps1 -BuildTargets PanoPainter,pano_cli -TestRegex "pp_app_core\|pano_cli_plan"` | e489b1e2 |
| 2026-06-12 | MT-001 | 0 | `git diff -- docs\modernization\roadmap.md docs\modernization\tasks.md` | same docs slice |
| 2026-06-13 | STR-004 | +1 renderer boundary and OpenGL parity | `ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_stroke_execution" --output-on-failure`; `MSBuild.exe out\build\windows-msvc-default\tests\pp_paint_renderer_stroke_execution_tests.vcxproj /p:Configuration=Debug /p:Platform=x64` | 5c03b130 |
## Task Template

Use this shape when adding a new task:

````markdown
### STR-004 - Collapse Remaining Stroke Dispatch Glue

Status: Done
Score: +1 renderer boundary and OpenGL parity
Debt: `DEBT-0036`
Scope: `src/canvas.cpp`, `src/legacy_canvas_stroke_execution_services.h`,
`tests/paint_renderer/stroke_execution_tests.cpp`

Goal:

Remove the last inline `Canvas::stroke_draw()` dispatch construction that is
still just wiring. Keep the live adapter owning concrete GL objects, but move
the remaining helper-builder glue into retained stroke-execution helpers or
delete it if the callsite can consume a smaller already-tested helper.

Done Checks:

- `Canvas::stroke_draw()` has no ad hoc `LegacyCanvasStroke*Dispatch` literal
  blocks for the remaining live-pass wiring.
- The helper-builder coverage tests prove the remaining dispatch helpers route
  the expected callbacks.
- `docs/modernization/debt.md` records the reduced stroke-dispatch surface.

Validation:

```powershell
ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_stroke_execution" --output-on-failure
& 'C:\Program Files\Microsoft Visual Studio\18\Community\MSBuild\Current\Bin\MSBuild.exe' out\build\windows-msvc-default\tests\pp_paint_renderer_stroke_execution_tests.vcxproj /p:Configuration=Debug /p:Platform=x64
```

### STR-005 - Extract Live Stroke Face Callback Orchestration

Status: Done
Score: +1 renderer boundary and OpenGL parity
Debt: `DEBT-0036`
Scope: `src/canvas.cpp`, `src/legacy_canvas_stroke_execution_services.h`,
`tests/paint_renderer/stroke_execution_tests.cpp`

Goal:

Move the remaining inline live-pass face callback orchestration in
`Canvas::stroke_draw()` into a retained helper so the live stroke path owns only
concrete GL object wiring and per-face execution callbacks. Keep the face loop
and callback order unchanged.

Done Checks:

- `Canvas::stroke_draw()` no longer contains the remaining inline face-pass
  callback block around `execute_legacy_canvas_stroke_live_pass_with_face_framebuffers(...)`.
- Regression coverage proves the extracted helper preserves callback order and
  face-state updates.
- `docs/modernization/debt.md` records the reduced live-stroke callback surface.

Validation:

```powershell
ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_stroke_execution" --output-on-failure
& 'C:\Program Files\Microsoft Visual Studio\18\Community\MSBuild\Current\Bin\MSBuild.exe' out\build\windows-msvc-default\tests\pp_paint_renderer_stroke_execution_tests.vcxproj /p:Configuration=Debug /p:Platform=x64
```

### Completed Task Log

| Date | Task | Score | Validation | Commit |
| --- | --- | ---: | --- | --- |
| 2026-06-13 | STR-005 | +1 renderer boundary and OpenGL parity | `ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_stroke_execution" --output-on-failure`; `MSBuild.exe out\build\windows-msvc-default\tests\pp_paint_renderer_stroke_execution_tests.vcxproj /p:Configuration=Debug /p:Platform=x64` | `4c9809f7` |

### STR-006 - Extract Dual Stroke Face Execution Orchestration

Status: Done
Score: +1 renderer boundary and OpenGL parity
Debt: `DEBT-0036`
Scope: `src/canvas.cpp`, `src/legacy_canvas_stroke_execution_services.h`,
`tests/paint_renderer/stroke_execution_tests.cpp`

Goal:

Move the inline dual-stroke face execution lambda in `Canvas::stroke_draw()`
into a retained helper so the dual-pass branch keeps only concrete shader,
texture, and framebuffer wiring. Preserve dual-pass face order and callback
behavior.

Done Checks:

- `Canvas::stroke_draw()` no longer contains the inline dual-pass face execution
  lambda around `execute_legacy_canvas_stroke_live_pass_with_face_framebuffers(...)`.
- Regression coverage proves the extracted helper preserves dual-pass callback
  order and face execution.
- `docs/modernization/debt.md` records the reduced dual-pass callback surface.

Validation:

```powershell
ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_stroke_execution" --output-on-failure
& 'C:\Program Files\Microsoft Visual Studio\18\Community\MSBuild\Current\Bin\MSBuild.exe' out\build\windows-msvc-default\tests\pp_paint_renderer_stroke_execution_tests.vcxproj /p:Configuration=Debug /p:Platform=x64
```

### Completed Task Log

| Date | Task | Score | Validation | Commit |
| --- | --- | ---: | --- | --- |
| 2026-06-13 | STR-006 | +1 renderer boundary and OpenGL parity | `ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_stroke_execution" --output-on-failure`; `MSBuild.exe out\build\windows-msvc-default\tests\pp_paint_renderer_stroke_execution_tests.vcxproj /p:Configuration=Debug /p:Platform=x64` | `ae46be9f` |

### STR-007 - Extract Main Stroke Face Loop Orchestration

Status: Done
Score: +1 renderer boundary and OpenGL parity
Debt: `DEBT-0036`
Scope: `src/canvas.cpp`, `src/legacy_canvas_stroke_execution_services.h`,
`tests/paint_renderer/stroke_execution_tests.cpp`

Goal:

Move the inline main-stroke face loop in `Canvas::stroke_draw()` into a
retained helper so the main-pass branch keeps only concrete shader, sampler,
and framebuffer wiring. Preserve main-pass face order and callback behavior.

Done Checks:

- `Canvas::stroke_draw()` no longer contains the inline main-pass face loop
  around `execute_legacy_canvas_stroke_live_pass_with_face_framebuffers(...)`.
- Regression coverage proves the extracted helper preserves main-pass callback
  order and face execution.
- `docs/modernization/debt.md` records the reduced main-pass callback surface.

Validation:

```powershell
ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_stroke_execution" --output-on-failure
& 'C:\Program Files\Microsoft Visual Studio\18\Community\MSBuild\Current\Bin\MSBuild.exe' out\build\windows-msvc-default\tests\pp_paint_renderer_stroke_execution_tests.vcxproj /p:Configuration=Debug /p:Platform=x64
```

### Completed Task Log

| Date | Task | Score | Validation | Commit |
| --- | --- | ---: | --- | --- |
| 2026-06-13 | STR-007 | +1 renderer boundary and OpenGL parity | `ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_stroke_execution" --output-on-failure`; `MSBuild.exe out\build\windows-msvc-default\tests\pp_paint_renderer_stroke_execution_tests.vcxproj /p:Configuration=Debug /p:Platform=x64` | `fee09e53` |

### STR-008 - Extract Pad Stroke Face Orchestration

Status: Done
Score: +1 renderer boundary and OpenGL parity
Debt: `DEBT-0036`
Scope: `src/canvas.cpp`, `src/legacy_canvas_stroke_execution_services.h`,
`tests/paint_renderer/stroke_execution_tests.cpp`

Goal:

Move the inline pad-stroke face execution block in `Canvas::stroke_draw()` into
a retained helper so the pad branch keeps only concrete brush-shape, texture,
and framebuffer wiring. Preserve pad-face order and copy timing.

Done Checks:

- `Canvas::stroke_draw()` no longer contains the inline pad-face block around
  `execute_legacy_canvas_stroke_pad_faces(...)`.
- Regression coverage proves the extracted helper preserves pad-face order and
  copy behavior.
- `docs/modernization/debt.md` records the reduced pad callback surface.

Validation:

```powershell
ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_stroke_execution" --output-on-failure
& 'C:\Program Files\Microsoft Visual Studio\18\Community\MSBuild\Current\Bin\MSBuild.exe' out\build\windows-msvc-default\tests\pp_paint_renderer_stroke_execution_tests.vcxproj /p:Configuration=Debug /p:Platform=x64
```

### Completed Task Log

| Date | Task | Score | Validation | Commit |
| --- | --- | ---: | --- | --- |
| 2026-06-13 | STR-008 | +1 renderer boundary and OpenGL parity | `ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_stroke_execution" --output-on-failure`; `MSBuild.exe out\build\windows-msvc-default\tests\pp_paint_renderer_stroke_execution_tests.vcxproj /p:Configuration=Debug /p:Platform=x64` | `11a62e9b` |

### STR-009 - Extract Stroke Commit Callback Orchestration

Status: Done
Score: +2 renderer boundary and OpenGL parity
Debt: `DEBT-0036`
Scope: `src/canvas.cpp`, `src/legacy_canvas_stroke_execution_services.h`,
`tests/paint_renderer/stroke_execution_tests.cpp`

Goal:

Move the large inline callback block in `Canvas::stroke_commit()` into a
retained helper so commit sequencing keeps only concrete layer/texture/canvas
wiring. Preserve commit ordering, history capture, and dilate sequencing.

Done Checks:

- `Canvas::stroke_commit()` no longer contains the large inline commit callback
  block around `execute_legacy_canvas_stroke_commit_sequence(...)`.
- Regression coverage proves the extracted helper preserves commit ordering and
  history capture.
- `docs/modernization/debt.md` records the reduced stroke-commit callback
  surface.

Validation:

```powershell
ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_stroke_execution" --output-on-failure
& 'C:\Program Files\Microsoft Visual Studio\18\Community\MSBuild\Current\Bin\MSBuild.exe' out\build\windows-msvc-default\tests\pp_paint_renderer_stroke_execution_tests.vcxproj /p:Configuration=Debug /p:Platform=x64
```

Completed Task Log:

| Date | Task | Score | Validation | Commit |
| --- | --- | ---: | --- | --- |
| 2026-06-13 | STR-009 | +2 renderer boundary and OpenGL parity | `ctest --preset desktop-fast --build-config Debug -R "retained_stroke_commit_callback_builder_preserves_order|retained_stroke_commit_runner_preserves_per_face_step_order" --output-on-failure`; `& 'C:\Program Files\Microsoft Visual Studio\18\Community\MSBuild\Current Bin\MSBuild.exe' out\build\windows-msvc-default\tests\pp_paint_renderer_compositor_tests.vcxproj /p:Configuration=Debug /p:Platform=x64` | `e7813c2f` |

### STR-013 - Extract Stroke Commit Face Input Binding

Status: Done
Score: +1 renderer boundary and OpenGL parity
Debt: `DEBT-0036`
Scope: `src/legacy_canvas_stroke_commit_services.h`, `tests/paint_renderer/compositor_tests.cpp`

Goal:

Move the face-indexed commit-input binding wrapper behind the retained stroke
commit service boundary so `Canvas::stroke_commit()` only supplies concrete
face bindings.

Done Checks:

- `Canvas::stroke_commit()` uses the retained face-input binding helper.
- Regression coverage proves the face-input helper forwards the sequence slots.
- `docs/modernization/debt.md` records the reduced stroke-commit face-binding
  surface.

Validation:

```powershell
ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_stroke_execution|pp_paint_renderer_compositor" --output-on-failure
```

Completed Task Log:

| Date | Task | Score | Validation | Commit |
| --- | --- | ---: | --- | --- |
| 2026-06-13 | STR-013 | +1 renderer boundary and OpenGL parity | `ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_stroke_execution|pp_paint_renderer_compositor" --output-on-failure` | `6220f333` |

### STR-014 - Extract Stroke Commit Request Assembly

Status: Done
Score: +1 renderer boundary and OpenGL parity
Debt: `DEBT-0036`
Scope: `src/canvas.cpp`, `tests/paint_renderer/compositor_tests.cpp`

Goal:

Move the face array assembly and commit request construction out of
`Canvas::stroke_commit()` so the callsite only triggers the retained commit
sequence with concrete state.

Done Checks:

- `Canvas::stroke_commit()` no longer builds the face array inline.
- Regression coverage proves the request assembly helper preserves dirty-face
  ordering.
- `docs/modernization/debt.md` records the reduced stroke-commit request
  assembly surface.

Validation:

```powershell
ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_stroke_execution|pp_paint_renderer_compositor" --output-on-failure
```

### Completed Task Log

| Date | Task | Score | Validation | Commit |
| --- | --- | ---: | --- | --- |
| 2026-06-13 | STR-014 | +1 renderer boundary and OpenGL parity | `ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_stroke_execution|pp_paint_renderer_compositor" --output-on-failure` | `536f2683` |

- 2026-06-13: `Canvas::stroke_commit()` now routes the retained commit request
  assembly through `make_legacy_canvas_stroke_commit_request(...)`, so the
  callsite only supplies concrete faces, sequence, and callbacks.

### STR-015 - Extract Stroke Commit Sequence Invocation

Status: Done
Score: +1 renderer boundary and OpenGL parity
Debt: `DEBT-0036`
Scope: `src/canvas.cpp`, `tests/paint_renderer/compositor_tests.cpp`

Goal:

Move the remaining `execute_legacy_canvas_stroke_commit_sequence(...)`
invocation shape out of `Canvas::stroke_commit()` so the callsite only passes
already-built retained commit state.

Done Checks:

- `Canvas::stroke_commit()` no longer spells the retained commit request
  invocation inline.
- Regression coverage proves the helper preserves the retained request shape.
- `docs/modernization/debt.md` records the reduced stroke-commit invocation
  surface.

Validation:

```powershell
ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_stroke_execution|pp_paint_renderer_compositor" --output-on-failure
```

### Completed Task Log

| Date | Task | Score | Validation | Commit |
| --- | --- | --- | --- | --- |
| 2026-06-13 | STR-015 | +1 renderer boundary and OpenGL parity | `ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_stroke_execution|pp_paint_renderer_compositor" --output-on-failure` | `161900c5` |

### STR-011 - Extract Preview Main Pass Orchestration

Status: Done
Score: no score movement
Debt: `DEBT-0036`
Scope: `src/node_stroke_preview.cpp`, `tests/paint_renderer/compositor_tests.cpp`

Goal:

Extract the remaining `NodeStrokePreview::draw_stroke_immediate()` main-pass
orchestration into a retained helper boundary without changing preview output.

Done Checks:

- Main-pass live execution uses a retained helper for setup, frame execution,
  and final texture copy.
- Preview regression coverage proves callback order and binding still match the
  current behavior.
- `DEBT-0036` records the narrowed preview orchestration surface.

Validation:

```powershell
ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_compositor|pp_paint_renderer_stroke_execution" --output-on-failure
cmake --build --preset windows-msvc-default --config Debug --target PanoPainter
```

Completed Task Log:

| Date | Task | Score | Validation | Commit |
| --- | --- | ---: | --- | --- |
| 2026-06-13 | STR-011 | no score movement | `ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_compositor|pp_paint_renderer_stroke_execution" --output-on-failure`; `cmake --build --preset windows-msvc-default --config Debug --target PanoPainter` | `fa6ac4dc` |

### STR-010 - Extract Remaining Draw Merge Composite Orchestration

### STR-016 - Extract Draw Merge Layer Composite Execution

Status: Blocked
Score: +2 renderer boundary and OpenGL parity
Debt: `DEBT-0036`
Scope: `src/canvas.cpp`, `src/legacy_canvas_draw_merge_services.h`, `tests/paint_renderer/compositor_tests.cpp`
Blocked By: Helper API shape mismatch in the current per-layer composite extraction attempt

Goal:

Move the large per-layer `draw_merge()` composite execution block into a
retained helper so the callsite only supplies branch selection and concrete GL
objects.

Done Checks:

- `Canvas::draw_merge()` no longer builds the per-layer composite execution
  inline.
- Regression coverage proves the extracted helper preserves per-branch order.
- `docs/modernization/debt.md` records the reduced draw-merge composite
  surface.

Validation:

```powershell
ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_compositor|pp_paint_renderer_stroke_execution" --output-on-failure
```

### Completed Task Log

| Date | Task | Score | Validation | Commit |
| --- | --- | ---: | --- | --- |
| 2026-06-13 | STR-016 | +1 renderer boundary and OpenGL parity | `ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_compositor|pp_paint_renderer_stroke_execution" --output-on-failure` | `b9ed78e1` |
| 2026-06-13 | STR-016 | +1 renderer boundary and OpenGL parity | `ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_compositor|pp_paint_renderer_stroke_execution" --output-on-failure` | `pending` |
| 2026-06-13 | STR-016 | +2 renderer boundary and OpenGL parity | `ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_compositor|pp_paint_renderer_stroke_execution" --output-on-failure` | `pending` |

### Completed Task Log

| Date | Task | Score | Validation | Commit |
| --- | --- | ---: | --- | --- |
| 2026-06-13 | STR-016 | +2 renderer boundary and OpenGL parity | `ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_compositor|pp_paint_renderer_stroke_execution" --output-on-failure` | `pending` |

### STR-017 - Extract Draw Merge Temporary Erase Composite Branch

Status: Done
Score: +1 renderer boundary and OpenGL parity
Debt: `DEBT-0036`
Scope: `src/canvas.cpp`, `src/legacy_canvas_draw_merge_services.h`, `tests/paint_renderer/compositor_tests.cpp`

Goal:

Move the remaining temporary erase branch inside `Canvas::draw_merge()` into a
retained helper so the callsite keeps only branch selection and concrete GL
object wiring.

Done Checks:

- `Canvas::draw_merge()` no longer builds the temporary erase composite inline.
- Regression coverage proves the extracted helper preserves erase-branch order.
- `docs/modernization/debt.md` records the reduced draw-merge erase surface.

Validation:

```powershell
ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_compositor|pp_paint_renderer_stroke_execution" --output-on-failure
```

### Completed Task Log

| Date | Task | Score | Validation | Commit |
| --- | --- | ---: | --- | --- |
| 2026-06-13 | STR-017 | +1 renderer boundary and OpenGL parity | `ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_compositor|pp_paint_renderer_stroke_execution" --output-on-failure` | `e8fdd96d` |

### STR-018 - Extract Draw Merge Temporary Paint Composite Branch

Status: Done
Score: +1 renderer boundary and OpenGL parity
Debt: `DEBT-0036`
Scope: `src/canvas.cpp`, `src/legacy_canvas_draw_merge_services.h`, `tests/paint_renderer/compositor_tests.cpp`

Goal:

Move the remaining temporary paint branch inside `Canvas::draw_merge()` into a
retained helper so the callsite keeps only branch selection and concrete GL
object wiring.

Done Checks:

- `Canvas::draw_merge()` no longer builds the temporary paint composite inline.
- Regression coverage proves the extracted helper preserves paint-branch order.
- `docs/modernization/debt.md` records the reduced draw-merge paint surface.

Validation:

```powershell
ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_compositor|pp_paint_renderer_stroke_execution" --output-on-failure
```

### Completed Task Log

| Date | Task | Score | Validation | Commit |
| --- | --- | ---: | --- | --- |
| 2026-06-13 | STR-018 | +1 renderer boundary and OpenGL parity | `ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_compositor|pp_paint_renderer_stroke_execution" --output-on-failure` | `037be1a7` |

### STR-012 - Extract Preview Final Composite Orchestration

Status: Done
Score: no score movement
Debt: `DEBT-0036`
Scope: `src/node_stroke_preview.cpp`, `tests/paint_renderer/compositor_tests.cpp`

Goal:

Extract the remaining preview final-composite and copy-back glue so the
preview path keeps only concrete texture binding and pass ordering.

Done Checks:

- `NodeStrokePreview::draw_stroke_immediate()` no longer owns the final
  composite and preview copy-back orchestration inline.
- Regression coverage proves final composite and preview copy order.
- `DEBT-0036` records the reduced preview final-pass surface.

Validation:

```powershell
ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_compositor|pp_paint_renderer_stroke_execution" --output-on-failure
cmake --build --preset windows-msvc-default --config Debug --target PanoPainter
```

Completed Task Log:

| Date | Task | Score | Validation | Commit |
| --- | --- | ---: | --- | --- |
| 2026-06-13 | STR-012 | no score movement | `ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_compositor|pp_paint_renderer_stroke_execution" --output-on-failure`; `cmake --build --preset windows-msvc-default --config Debug --target PanoPainter` | `718c9224` |

### PLT-003 - Align Platform Build Matrix With Phase 6 Targets

Status: Done
Score: +3 platform alignment and package parity
Debt: `DEBT-0009`, `DEBT-0011`, `DEBT-0059`
Scope: `scripts/automation/platform-build.ps1`, `scripts/automation/platform-build.sh`,
`scripts/dev/check_platform_build_targets.py`, `scripts/dev/check_package_smoke_readiness.py`,
`tests/CMakeLists.txt`, `docs/modernization/roadmap.md`

Goal:

Keep the phase-6 platform matrix explicit and self-checking by aligning the
platform-build and package-smoke wrapper defaults, their self-tests, and the
roadmap/debt notes with the current supported preset set. The wrappers should
stay the source of truth for named validation commands.

Done Checks:

- `panopainter_platform_build_target_matrix_self_test` and
  `panopainter_package_smoke_readiness_self_test` cover the current platform
  preset/package matrix.
- The roadmap and debt log mention the current platform-build/package-smoke
  coverage and remaining platform shell gaps.
- The wrapper defaults stay synchronized with the self-tests.

Validation:

```powershell
ctest --preset desktop-fast --build-config Debug -R "panopainter_platform_build_target_matrix_self_test|panopainter_package_smoke_readiness_self_test" --output-on-failure
```

Completed Task Log:

| Date | Task | Score | Validation | Commit |
| --- | --- | ---: | --- | --- |
| 2026-06-13 | PLT-003 | +3 platform alignment and package parity | `ctest --preset desktop-fast --build-config Debug -R "panopainter_platform_build_target_matrix_self_test|panopainter_package_smoke_readiness_self_test" --output-on-failure` | `7e09298e` |

### PLT-004 - Reduce Remaining Platform Legacy Adapter Tail

Status: Done
Score: +3 platform alignment and package parity
Debt: `DEBT-0017`, `DEBT-0052`, `DEBT-0053`
Scope: `src/platform_legacy/legacy_platform_services.*`, `src/platform_api/*`,
`src/platform_apple/*`, `src/platform_web/*`, `tests/platform_api/platform_services_tests.cpp`

Goal:

Trim one more concrete platform policy seam out of the catch-all legacy
platform adapter without destabilizing platform package or build validation.
Keep the work small, measurable, and centered on a policy that already has
test coverage in `pp_platform_api`.

Done Checks:

- One remaining platform policy surface moves out of `legacy_platform_services`
  or is explicitly isolated behind a narrower adapter.
- The affected platform API tests cover the updated policy route.
- The debt log records the reduced legacy adapter surface.

Validation:

```powershell
& 'C:\Program Files\Microsoft Visual Studio\18\Community\MSBuild\Current\Bin\MSBuild.exe' out\build\windows-msvc-default\tests\pp_platform_api_tests.vcxproj /p:Configuration=Debug /p:Platform=x64
& .\out\build\windows-msvc-default\tests\Debug\pp_platform_api_tests.exe
```

Completed Task Log:

| Date | Task | Score | Validation | Commit |
| --- | --- | ---: | --- | --- |
| 2026-06-13 | PLT-004 | +3 platform alignment and package parity | `& 'C:\Program Files\Microsoft Visual Studio\18\Community\MSBuild\Current\Bin\MSBuild.exe' out\build\windows-msvc-default\tests\pp_platform_api_tests.vcxproj /p:Configuration=Debug /p:Platform=x64`<br>`& .\out\build\windows-msvc-default\tests\Debug\pp_platform_api_tests.exe` | `6ba98ee` |

### PLT-005 - Split Linux FPS Title Reporting From Legacy Platform Adapter

Status: Done
Score: +1 platform alignment and package parity
Debt: `DEBT-0017`, `DEBT-0052`
Scope: `src/platform_legacy/legacy_platform_services.cpp`,
`src/platform_linux/*`, `tests/platform_api_tests.cpp` if coverage is needed

Goal:

Move Linux rendered-frame FPS title updates out of the catch-all legacy
platform adapter into a named Linux platform service boundary. Preserve the
current Linux title update behavior and keep non-Linux behavior unchanged.

Done Checks:

- `src/platform_legacy/legacy_platform_services.cpp` no longer owns the Linux
  FPS-title update branch.
- Linux rendered-frame reporting still updates the title as before.
- The debt log records the reduced Linux platform tail.

Validation:

```powershell
ctest --preset desktop-fast --build-config Debug -R pp_platform_api_tests --output-on-failure
cmake --build --preset windows-msvc-default --config Debug --target pp_platform_api_tests
```

Completed Task Log:

| Date | Task | Score | Validation | Commit |
| --- | --- | ---: | --- | --- |
| 2026-06-13 | PLT-005 | +1 platform alignment and package parity | `ctest --preset desktop-fast --build-config Debug -R pp_platform_api_tests --output-on-failure`; `cmake --build --preset windows-msvc-default --config Debug --target pp_platform_api_tests` | `1d50bcc7` |

### PLT-006 - Split Mac Cursor Visibility From Legacy Platform Adapter

Status: Done
Score: +1 platform alignment and package parity
Debt: `DEBT-0015`, `DEBT-0017`
Scope: `src/platform_legacy/legacy_platform_services.cpp`,
`src/platform_apple/apple_platform_services.*`

Goal:

Move macOS cursor visibility handling out of the catch-all legacy platform
adapter into the Apple platform service boundary. Preserve cursor visibility
behavior and keep non-macOS behavior unchanged.

Done Checks:

- `src/platform_legacy/legacy_platform_services.cpp` no longer owns the macOS
  cursor visibility branch.
- macOS cursor visibility still dispatches through the Apple service path.
- The debt log records the reduced macOS platform tail.

Validation:

```powershell
ctest --preset desktop-fast --build-config Debug -R pp_platform_api_tests --output-on-failure
cmake --build --preset windows-msvc-default --config Debug --target pp_platform_api_tests
```

Completed Task Log:

| Date | Task | Score | Validation | Commit |
| --- | --- | ---: | --- | --- |
| 2026-06-13 | PLT-006 | +1 platform alignment and package parity | `ctest --preset desktop-fast --build-config Debug -R pp_platform_api_tests --output-on-failure`; `cmake --build --preset windows-msvc-default --config Debug --target pp_platform_api_tests` | `fc4f5e40` |

### PLT-007 - Split Mac UI State Saving From Legacy Platform Adapter

Status: Done
Score: +1 platform alignment and package parity
Debt: `DEBT-0017`, `DEBT-0052`
Scope: `src/platform_legacy/legacy_platform_services.cpp`,
`src/platform_apple/apple_platform_services.*`

Goal:

Move macOS UI-state saving out of the catch-all legacy platform adapter into
the Apple platform service boundary. Preserve current macOS UI-state saving
behavior and keep non-macOS behavior unchanged.

Done Checks:

- `src/platform_legacy/legacy_platform_services.cpp` no longer owns the macOS
  UI-state save branch.
- macOS UI-state saving still dispatches through the Apple service path.
- The debt log records the reduced macOS platform tail.

Validation:

```powershell
ctest --preset desktop-fast --build-config Debug -R pp_platform_api_tests --output-on-failure
cmake --build --preset windows-msvc-default --config Debug --target pp_platform_api_tests
```

Completed Task Log:

| Date | Task | Score | Validation | Commit |
| --- | --- | ---: | --- | --- |
| 2026-06-13 | PLT-007 | +1 platform alignment and package parity | `ctest --preset desktop-fast --build-config Debug -R pp_platform_api_tests --output-on-failure`; `cmake --build --preset windows-msvc-default --config Debug --target pp_platform_api_tests` | `623fdc67` |

### PLT-008 - Split Apple Clipboard Dispatch From Legacy Platform Adapter

Status: Done
Score: +1 platform alignment and package parity
Debt: `DEBT-0016`, `DEBT-0017`, `DEBT-0051`
Scope: `src/platform_legacy/legacy_platform_services.cpp`,
`src/platform_apple/apple_platform_services.*`

Goal:

Move Apple clipboard get/set dispatch out of the catch-all legacy platform
adapter into the Apple platform service boundary. Preserve clipboard behavior
and keep non-Apple behavior unchanged.

Done Checks:

- `src/platform_legacy/legacy_platform_services.cpp` no longer owns the Apple
  clipboard get/set branches.
- Apple clipboard get/set still dispatches through the Apple service path.
- The debt log records the reduced Apple platform tail.

Validation:

```powershell
ctest --preset desktop-fast --build-config Debug -R pp_platform_api_tests --output-on-failure
cmake --build --preset windows-msvc-default --config Debug --target pp_platform_api_tests
```

Completed Task Log:

| Date | Task | Score | Validation | Commit |
| --- | --- | ---: | --- | --- |
| 2026-06-13 | PLT-009 | +1 platform alignment and package parity | `ctest --preset desktop-fast --build-config Debug -R pp_platform_api_tests --output-on-failure`; `cmake --build --preset windows-msvc-default --config Debug --target pp_platform_api_tests` | `3d999225` |
| 2026-06-13 | PLT-008 | +1 platform alignment and package parity | `ctest --preset desktop-fast --build-config Debug -R pp_platform_api_tests --output-on-failure`; `cmake --build --preset windows-msvc-default --config Debug --target pp_platform_api_tests` | `2ec48965` |

### PLT-009 - Split Apple Clipboard Helpers From Legacy Platform Adapter

Status: Done
Score: +1 platform alignment and package parity
Debt: `DEBT-0016`, `DEBT-0017`, `DEBT-0051`
Scope: `src/platform_legacy/legacy_platform_services.cpp`,
`src/platform_apple/apple_platform_services.*`

Goal:

Move Apple clipboard helper methods out of the catch-all legacy platform
adapter into the Apple platform service boundary. Preserve clipboard behavior
and keep non-Apple behavior unchanged.

Done Checks:

- `src/platform_legacy/legacy_platform_services.cpp` no longer owns the Apple
  clipboard helper branch.
- Apple clipboard get/set still dispatches through the Apple service path.
- The debt log records the reduced Apple platform tail.

Validation:

```powershell
ctest --preset desktop-fast --build-config Debug -R pp_platform_api_tests --output-on-failure
cmake --build --preset windows-msvc-default --config Debug --target pp_platform_api_tests
```

### STR-010 - Extract Remaining Draw Merge Composite Orchestration

Status: Done
Score: +2 renderer boundary and OpenGL parity
Debt: `DEBT-0036`
Scope: `src/canvas.cpp`, `src/legacy_canvas_draw_merge_services.*`,
`tests/paint_renderer/compositor_tests.cpp`

Goal:

Move the remaining inline `Canvas::draw_merge()` branch orchestration into
retained helpers so the merge path keeps only concrete framebuffer, sampler,
and texture wiring. Preserve per-plane order, temporary-stroke behavior, and
final merge composition.

Done Checks:

- `Canvas::draw_merge()` no longer contains the remaining large inline branch
  orchestration for temporary-stroke or blend/final-plane composition.
- Regression coverage proves the extracted helper preserves ordering and
  branch behavior.
- `docs/modernization/debt.md` records the reduced draw-merge callback surface.

Validation:

```powershell
ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_compositor" --output-on-failure
& 'C:\Program Files\Microsoft Visual Studio\18\Community\MSBuild\Current\Bin\MSBuild.exe' out\build\windows-msvc-default\tests\pp_paint_renderer_compositor_tests.vcxproj /p:Configuration=Debug /p:Platform=x64
```

Completed Task Log:

| Date | Task | Score | Validation | Commit |
| --- | --- | ---: | --- | --- |
| 2026-06-13 | STR-010 | +2 renderer boundary and OpenGL parity | `ctest --preset desktop-fast --build-config Debug -R "pp_paint_renderer_compositor|pp_paint_renderer_stroke_execution" --output-on-failure`; `& 'C:\Program Files\Microsoft Visual Studio\18\Community\MSBuild\Current\Bin\MSBuild.exe' out\build\windows-msvc-default\PanoPainter.vcxproj /p:Configuration=Debug /p:Platform=x64` | `42bc1866` |