diff --git a/docs/modernization/debt.md b/docs/modernization/debt.md
index 5dac2948..aa2abcc7 100644
--- a/docs/modernization/debt.md
+++ b/docs/modernization/debt.md
@@ -18,6 +18,12 @@ agent or engineer to remove them without reconstructing context from chat.
 
 ## Recent Reductions
 
+- 2026-06-15: `DEBT-0042` was narrowed again. The retained Save Version
+  execution in `src/legacy_document_session_services.cpp` now routes through a
+  focused helper instead of living inline in
+  `LegacyDocumentVersionSaveServices::save_document_version()`; the remaining
+  document-session bridge debt stays concentrated in close prompts, save
+  dialogs, overwrite prompts, and keyboard/dialog cleanup.
 - 2026-06-15: `DEBT-0040` was narrowed again. The retained close-unsaved
   prompt wiring in `src/legacy_document_session_services.cpp` now routes
   through a focused helper instead of living inline in
diff --git a/docs/modernization/roadmap.md b/docs/modernization/roadmap.md
index 52b5d3a3..26bbdd97 100644
--- a/docs/modernization/roadmap.md
+++ b/docs/modernization/roadmap.md
@@ -1420,6 +1420,10 @@ The retained close-unsaved prompt wiring in
 helper, so the remaining document-session bridge debt is further concentrated
 on save-before-workflow prompts, save-version routing, app document field
 mutation, and keyboard/dialog cleanup.
+The retained Save Version execution in `src/legacy_document_session_services.*`
+now also routes through a focused helper, so the remaining document-session
+bridge debt is further concentrated on close prompts, save dialogs,
+overwrite prompts, and keyboard/dialog cleanup.
 `App::dialog_newdoc` now routes accepted new-document plans through the
 app-core new-document executor and `src/legacy_document_session_services.*`,
 preserving target overwrite prompts, legacy canvas resize/layer setup, history
diff --git a/docs/modernization/tasks.md b/docs/modernization/tasks.md
index d5819901..ff841cb9 100644
--- a/docs/modernization/tasks.md
+++ b/docs/modernization/tasks.md
@@ -1524,6 +1524,42 @@ Completed Task Log:
 | --- | --- | ---: | --- | --- |
 | 2026-06-15 | ADP-040 | no score movement | `powershell -ExecutionPolicy Bypass -File scripts\\automation\\quiet-validate.ps1 -BuildTargets pano_cli,pp_app_core_document_session_tests -TestRegex "pp_app_core_document_session|pano_cli_plan_document_session_prompt"` | `be8dee8d` |
 
+### ADP-041 - Extract Document-Session Save-Version Helper
+
+Status: Done
+Score: no score movement
+Debt: `DEBT-0042`
+Scope: `src/legacy_document_session_services.cpp` only
+
+Closeout: `be8dee8d`
+
+Goal:
+
+Reduce the inline retained Save Version execution surface by extracting the
+version-save body from `LegacyDocumentVersionSaveServices::save_document_version()`
+into a focused helper while preserving current behavior.
+
+Done Checks:
+
+- The retained Save Version execution no longer lives inline in
+  `LegacyDocumentVersionSaveServices::save_document_version()`.
+- The retained version-save path now routes through a focused helper in
+  `src/legacy_document_session_services.cpp`.
+- `DEBT-0042` and the roadmap note the reduced remaining document-session
+  bridge surface.
+
+Validation:
+
+```powershell
+powershell -ExecutionPolicy Bypass -File scripts\\automation\\quiet-validate.ps1 -BuildTargets pano_cli,pp_app_core_document_session_tests -TestRegex "pp_app_core_document_session|pano_cli_plan_document_session_prompt"
+```
+
+Completed Task Log:
+
+| Date | Task | Score | Validation | Commit |
+| --- | --- | ---: | --- | --- |
+| 2026-06-15 | ADP-041 | no score movement | `powershell -ExecutionPolicy Bypass -File scripts\\automation\\quiet-validate.ps1 -BuildTargets pano_cli,pp_app_core_document_session_tests -TestRegex "pp_app_core_document_session|pano_cli_plan_document_session_prompt"` | `be8dee8d` |
+
 ### RND-001 - Make Pure Equirectangular Export The Primary Success Path
 
 Status: Done
diff --git a/src/legacy_document_session_services.cpp b/src/legacy_document_session_services.cpp
index 912f140d..a011df8b 100644
--- a/src/legacy_document_session_services.cpp
+++ b/src/legacy_document_session_services.cpp
@@ -252,6 +252,8 @@ private:
     std::shared_ptr<NodeDialogSave> dialog_;
 };
 
+void save_document_version(App& app, const pp::app::DocumentVersionTarget& target);
+
 class LegacyDocumentVersionSaveServices final : public pp::app::DocumentVersionSaveServices {
 public:
     explicit LegacyDocumentVersionSaveServices(App& app) noexcept
@@ -261,21 +263,26 @@ public:
 
     void save_document_version(const pp::app::DocumentVersionTarget& target) override
     {
-        const auto history_status = apply_document_history(pp::app::plan_document_version_save_history(target));
-        if (!history_status.ok()) {
-            LOG("Document version history effect failed: %s", history_status.message);
-        }
-        app_.doc_name = target.name;
-        app_.doc_path = target.path;
-        app_.canvas->m_canvas->m_unsaved = true;
-        app_.title_update();
-        project_save_after_snapshot(app_, app_.doc_path);
+        save_document_version(app_, target);
     }
 
 private:
     App& app_;
 };
 
+void save_document_version(App& app, const pp::app::DocumentVersionTarget& target)
+{
+    const auto history_status = apply_document_history(pp::app::plan_document_version_save_history(target));
+    if (!history_status.ok()) {
+        LOG("Document version history effect failed: %s", history_status.message);
+    }
+    app.doc_name = target.name;
+    app.doc_path = target.path;
+    app.canvas->m_canvas->m_unsaved = true;
+    app.title_update();
+    project_save_after_snapshot(app, app.doc_path);
+}
+
 class LegacyCloseRequestServices final : public pp::app::CloseRequestServices {
 public:
     LegacyCloseRequestServices(App& app, bool& dialog_already_opened) noexcept