Record shared history bridge closeout

docs/modernization/debt.md

@@ -87,6 +87,11 @@ agent or engineer to remove them without reconstructing context from chat.
   helper in `src/legacy_document_open_services.cpp` instead of living inline in
   the retained document-open helper; the remaining document-open bridge debt
   stays concentrated in retained history services.
+- 2026-06-15: `DEBT-0039`/`DEBT-0040` were narrowed again. The retained
+  history adapter now reuses the shared `src/legacy_history_services.*` helper
+  from both document-open and document-session bridges instead of living
+  inline in those bridge files; the remaining bridge debt stays concentrated in
+  retained history services.
 - 2026-06-15: `DEBT-0038` was narrowed again. The retained cloud downloaded-
   project open camera reset and layer-clear setup in
   `execute_legacy_downloaded_project_open()` now routes through a focused

docs/modernization/roadmap.md

@@ -1411,6 +1411,10 @@ retained history services.
 The retained project-open history-planning call in `open_legacy_project()`
 now also routes through a focused helper, so the remaining document-open
 bridge debt is further concentrated on retained history services.
+The retained history adapter now also reuses the shared
+`src/legacy_history_services.*` helper from both document-open and
+document-session bridges, so the remaining bridge debt is further concentrated
+on retained history services.
 `App::request_close`, `App::save_document`, and
 `App::continue_document_workflow_after_optional_save` now route through
 app-core document-session executors and `src/legacy_document_session_services.*`,

docs/modernization/tasks.md

@@ -1815,6 +1815,42 @@ Completed Task Log:
 | --- | --- | ---: | --- | --- |
 | 2026-06-15 | ADP-048 | no score movement | `powershell -ExecutionPolicy Bypass -File scripts\\automation\\quiet-validate.ps1 -BuildTargets pano_cli -TestRegex "pp_app_core_document_route|pp_app_core_document_session"` | `c2083565` |
 
+### ADP-049 - Reuse Shared History Service In Document Bridges
+
+Status: Done
+Score: no score movement
+Debt: `DEBT-0039`, `DEBT-0040`
+Scope: `src/legacy_document_open_services.cpp`, `src/legacy_document_session_services.cpp`
+
+Closeout: `530e572e`
+
+Goal:
+
+Reduce the duplicated retained history adapter surface by reusing the shared
+`src/legacy_history_services.*` helper from both document-open and
+document-session bridges while preserving current behavior.
+
+Done Checks:
+
+- The retained history adapter no longer lives inline in the document-open and
+  document-session bridges.
+- The retained document-open and document-session history paths now reuse the
+  shared `src/legacy_history_services.*` helper.
+- `DEBT-0039`, `DEBT-0040`, and the roadmap note the reduced retained history
+  adapter surface.
+
+Validation:
+
+```powershell
+powershell -ExecutionPolicy Bypass -File scripts\\automation\\quiet-validate.ps1 -BuildTargets pano_cli -TestRegex "pp_app_core_document_route|pp_app_core_document_session"
+```
+
+Completed Task Log:
+
+| Date | Task | Score | Validation | Commit |
+| --- | --- | ---: | --- | --- |
+| 2026-06-15 | ADP-049 | no score movement | `powershell -ExecutionPolicy Bypass -File scripts\\automation\\quiet-validate.ps1 -BuildTargets pano_cli -TestRegex "pp_app_core_document_route|pp_app_core_document_session"` | `530e572e` |
+
 ### RND-001 - Make Pure Equirectangular Export The Primary Success Path
 
 Status: Done