feat: add auto-assign section option to prompt workspace creation

lib/src/features/workbench/application/background_setup_jobs.dart

@@ -172,6 +172,8 @@ class BackgroundSetupJobs extends _$BackgroundSetupJobs
               issueUrl: issueUrl,
             ),
         launchAgent: runtime.launchAgent,
+        assignSection: (workspaceId, sectionId) =>
+            controller.saveWorkspaceSection(workspaceId, sectionId: sectionId),
         onPhase: (phase) => _setPhase(id, phase),
       );
       try {

lib/src/features/workbench/application/prompt_workspace_pipeline.dart

@@ -29,6 +29,7 @@ class const PromptWorkspacePipeline({
     required String operationId,
     required String projectId,
     required String prompt,
+    required bool autoAssignSection,
   })
   generateIdentity,
   required final Future<bool> Function(Project project, String branchName)
@@ -52,6 +53,8 @@ class const PromptWorkspacePipeline({
     required bool requireIdempotency,
   })
   launchAgent,
+  final Future<void> Function(String workspaceId, String sectionId)?
+  assignSection,
   final void Function(String phase)? onPhase,
   final String Function()? createOperationId,
 }) {
@@ -70,6 +73,7 @@ class const PromptWorkspacePipeline({
         operationId: createOperationId?.call() ?? const Uuid().v4(),
         projectId: request.project.id,
         prompt: identityPrompt,
+        autoAssignSection: request.autoAssignSection,
       );
       onPhase?.call('Checking generated branch');
       final collision =
@@ -93,6 +97,16 @@ class const PromptWorkspacePipeline({
           hostId: request.hostId,
           issueUrl: request.issueUrl,
         );
+        final sectionId = request.autoAssignSection ? identity.sectionId : null;
+        final sectionAssignment = assignSection;
+        if (sectionId != null && sectionAssignment != null) {
+          try {
+            await sectionAssignment(creation.workspace.id, sectionId);
+          } catch (_) {
+            // Section assignment is best-effort: the workspace itself was
+            // already created, so a failure must not fail the flow.
+          }
+        }
         break;
       } catch (error) {
         if (attempt == 0 && _looksLikeCollision(error)) {

lib/src/features/workbench/domain/background_setup_job.dart

@@ -36,6 +36,7 @@ class const PromptWorkspaceCreateRequest({
   final String? parentWorkspaceId,
   final String? hostId,
   final String? issueUrl,
+  final bool autoAssignSection = false,
   final WorkspaceCreationResult? created,
   final String? clientMutationId,
   final bool? originalLaunchWasIdempotent,
@@ -56,6 +57,7 @@ class const PromptWorkspaceCreateRequest({
       parentWorkspaceId: parentWorkspaceId,
       hostId: hostId,
       issueUrl: issueUrl,
+      autoAssignSection: autoAssignSection,
       created: created,
       clientMutationId: clientMutationId ?? this.clientMutationId,
       originalLaunchWasIdempotent:

lib/src/features/workbench/infra/prompt_workspace_runtime_client.dart

@@ -3,6 +3,7 @@ import 'package:alera/src/features/workbench/infra/terminal_host/terminal_host_p
 class const GeneratedWorkspaceIdentity({
   required final String workspaceName,
   required final String branchName,
+  final String? sectionId,
 });
 
 class const AgentProfileLaunchResult({
@@ -27,6 +28,7 @@ class PromptWorkspaceRuntimeClient(
     required String projectId,
     required String prompt,
     String? tabId,
+    bool autoAssignSection = false,
   }) async {
     await beforeAccess?.call();
     final payload = _asMap(
@@ -37,13 +39,17 @@ class PromptWorkspaceRuntimeClient(
           'projectId': projectId,
           'prompt': prompt,
           'tabId': ?tabId,
+          // Additive: an older host ignores the flag and simply omits
+          // sectionId from the response.
+          'autoAssignSection': autoAssignSection,
         },
         const Duration(minutes: 11),
       ),
     );
     return GeneratedWorkspaceIdentity(
       workspaceName: _requiredString(payload, 'workspaceName'),
       branchName: _requiredString(payload, 'branchName'),
+      sectionId: _optionalString(payload, 'sectionId'),
     );
   }
 
@@ -129,3 +135,11 @@ String _requiredString(Map<String, Object?> value, String key) {
   }
   throw FormatException('Runtime response is missing "$key".');
 }
+
+String? _optionalString(Map<String, Object?> value, String key) {
+  final field = value[key];
+  if (field is String && field.trim().isNotEmpty) {
+    return field;
+  }
+  return null;
+}

lib/src/features/workbench/presentation/prompt_workspace_dialog.dart

@@ -57,6 +57,7 @@ class const PromptWorkspaceDialog({
     required String operationId,
     required String projectId,
     required String prompt,
+    required bool autoAssignSection,
   })
   generateIdentity,
   required final Future<void> Function(String operationId) cancelGeneration,
@@ -102,6 +103,10 @@ class const PromptWorkspaceDialog({
   final String? initialError,
   final NewWorkspaceMode initialMode = .fromPrompt,
   final Widget? manualForm,
+  final bool hasWorkspaceSections = false,
+  final bool initialAutoAssignSection = true,
+  final Future<void> Function(String workspaceId, String sectionId)?
+  assignSection,
 }) extends StatefulWidget {
   @override
   State<PromptWorkspaceDialog> createState() => _PromptWorkspaceDialogState();
@@ -129,11 +134,16 @@ class _PromptWorkspaceDialogState extends State<PromptWorkspaceDialog> {
   String? _agentLaunchMutationId;
   bool? _originalAgentLaunchWasIdempotent;
   bool _createAnother = false;
+  bool _autoAssignSection = true;
   bool _useProjectCheckout = false;
 
+  bool get _autoAssignSectionEffective =>
+      widget.hasWorkspaceSections && _autoAssignSection;
+
   @override
   void initState() {
     super.initState();
+    _autoAssignSection = widget.initialAutoAssignSection;
     _useProjectCheckout =
         widget.enqueuePrompt != null && widget.initialUseProjectCheckout;
     _mode = widget.initialMode;
@@ -295,6 +305,7 @@ class _PromptWorkspaceDialogState extends State<PromptWorkspaceDialog> {
           parentWorkspaceId: _selectedParentWorkspaceId,
           hostId: _selectedHostId,
           issueUrl: _linkedIssueUrl(),
+          autoAssignSection: _autoAssignSectionEffective,
         ),
       );
       if (done == null) {
@@ -353,6 +364,7 @@ class _PromptWorkspaceDialogState extends State<PromptWorkspaceDialog> {
             operationId: operationId,
             projectId: project.id,
             prompt: identityPrompt,
+            autoAssignSection: _autoAssignSectionEffective,
           );
         } finally {
           if (_activeOperationId == operationId) {
@@ -388,6 +400,18 @@ class _PromptWorkspaceDialogState extends State<PromptWorkspaceDialog> {
             hostId: _selectedHostId,
             issueUrl: _linkedIssueUrl(),
           );
+          final sectionId = _autoAssignSectionEffective
+              ? identity.sectionId
+              : null;
+          final assignSection = widget.assignSection;
+          if (sectionId != null && assignSection != null) {
+            try {
+              await assignSection(creation.workspace.id, sectionId);
+            } catch (_) {
+              // Section assignment is best-effort: the workspace itself was
+              // already created, so a failure must not fail the flow.
+            }
+          }
           break;
         } catch (error) {
           if (attempt == 0 && _looksLikeCollision(error)) {
@@ -444,42 +468,6 @@ class _PromptWorkspaceDialogState extends State<PromptWorkspaceDialog> {
         message.contains('workspace for branch');
   }
 
-  Future<void> _cancelGeneration() async {
-    final operationId = _activeOperationId;
-    if (operationId != null) {
-      await widget.cancelGeneration(operationId);
-    }
-  }
-
-  Future<void> _finishCreation(
-    WorkspaceCreationResult creation,
-    String agentTabId,
-  ) async {
-    if (!_createAnother) {
-      Navigator.of(context).pop(
-        PromptWorkspaceDialogResult(creation: creation, agentTabId: agentTabId),
-      );
-      return;
-    }
-    await widget.onCreateAnother?.call(
-      creation: creation,
-      agentTabId: agentTabId,
-    );
-    if (!mounted) {
-      return;
-    }
-    _promptController.clear();
-    _issueUrlController.clear();
-    _agentLaunchMutationId = null;
-    _originalAgentLaunchWasIdempotent = null;
-    setState(() {
-      _working = false;
-      _phase = null;
-      _error = null;
-      _created = null;
-    });
-  }
-
   void _selectMode(NewWorkspaceMode mode) {
     setState(() => _mode = mode);
   }

lib/src/features/workbench/presentation/prompt_workspace_dialog_agent_launch.dart

@@ -49,4 +49,40 @@ extension _PromptWorkspaceDialogAgentLaunch on _PromptWorkspaceDialogState {
       }
     }
   }
+
+  Future<void> _cancelGeneration() async {
+    final operationId = _activeOperationId;
+    if (operationId != null) {
+      await widget.cancelGeneration(operationId);
+    }
+  }
+
+  Future<void> _finishCreation(
+    WorkspaceCreationResult creation,
+    String agentTabId,
+  ) async {
+    if (!_createAnother) {
+      Navigator.of(context).pop(
+        PromptWorkspaceDialogResult(creation: creation, agentTabId: agentTabId),
+      );
+      return;
+    }
+    await widget.onCreateAnother?.call(
+      creation: creation,
+      agentTabId: agentTabId,
+    );
+    if (!mounted) {
+      return;
+    }
+    _promptController.clear();
+    _issueUrlController.clear();
+    _agentLaunchMutationId = null;
+    _originalAgentLaunchWasIdempotent = null;
+    _update(() {
+      _working = false;
+      _phase = null;
+      _error = null;
+      _created = null;
+    });
+  }
 }

lib/src/features/workbench/presentation/prompt_workspace_dialog_form.dart

@@ -169,13 +169,28 @@ extension _PromptWorkspaceDialogForm on _PromptWorkspaceDialogState {
               ),
             ],
             const SizedBox(height: AleraTokens.space12),
-            AleraCheckbox(
-              value: _createAnother,
-              enabled: !_working && created == null,
-              onChanged: (value) {
-                _update(() => _createAnother = value);
-              },
-              label: 'Create Another',
+            Row(
+              children: <Widget>[
+                if (widget.hasWorkspaceSections) ...<Widget>[
+                  AleraCheckbox(
+                    value: _autoAssignSection,
+                    enabled: !_working && created == null,
+                    onChanged: (value) {
+                      _update(() => _autoAssignSection = value);
+                    },
+                    label: 'Auto Assign Section',
+                  ),
+                  const SizedBox(width: AleraTokens.space12),
+                ],
+                AleraCheckbox(
+                  value: _createAnother,
+                  enabled: !_working && created == null,
+                  onChanged: (value) {
+                    _update(() => _createAnother = value);
+                  },
+                  label: 'Create Another',
+                ),
+              ],
             ),
             const SizedBox(height: AleraTokens.space20),
             Row(

lib/src/features/workbench/presentation/workbench_dialog_launchers_create_workspace.dart

@@ -107,6 +107,9 @@ Future<void> _showCreateWorkspaceDialogs(
   String? remainingRetryJobId,
 }) async {
   var boundJobId = remainingRetryJobId;
+  final workbenchState = ref.read(workbenchControllerProvider);
+  final hasWorkspaceSections =
+      workbenchState.supportsSections && workbenchState.sections.isNotEmpty;
   final promptResult = await showDialog<PromptWorkspaceDialogResult>(
     context: context,
     builder: (_) => PromptWorkspaceDialog(
@@ -183,6 +186,10 @@ Future<void> _showCreateWorkspaceDialogs(
         for (final candidate in parentCandidates) candidate.workspace,
       ],
       initialUseProjectCheckout: retryPrompt?.useProjectCheckout ?? true,
+      hasWorkspaceSections: hasWorkspaceSections,
+      initialAutoAssignSection: retryPrompt?.autoAssignSection ?? true,
+      assignSection: (workspaceId, sectionId) =>
+          controller.saveWorkspaceSection(workspaceId, sectionId: sectionId),
       generateIdentity: runtime.generateIdentity,
       cancelGeneration: runtime.cancel,
       createWorkspace:

mobile/lib/src/features/runtime/domain/agent_profile_summary.dart

@@ -21,6 +21,7 @@ class const AgentProfileSummary({
 class const GeneratedWorkspaceIdentity({
   required final String workspaceName,
   required final String branchName,
+  final String? sectionId,
 });
 
 class const AgentProfileLaunchResult({

mobile/lib/src/features/runtime/domain/runtime_client_surfaces.dart

@@ -233,6 +233,7 @@ abstract interface class MobileWorkspaceClient {
     required String operationId,
     required String projectId,
     required String prompt,
+    bool autoAssignSection = false,
   });
   Future<void> cancelWorkspaceIdentity(String operationId);
   Future<PromptImageUploadResult> uploadPromptImage({

mobile/lib/src/features/runtime/infra/mobile_runtime_workspace_client.dart

@@ -299,19 +299,24 @@ mixin MobileRuntimeWorkspaceClient {
     required String operationId,
     required String projectId,
     required String prompt,
+    bool autoAssignSection = false,
   }) async {
     final payload = await requestMap(
       'aiText.workspaceIdentity.generate',
       <String, Object?>{
         'operationId': operationId,
         'projectId': projectId,
         'prompt': prompt,
+        // Additive: an older host ignores the flag and simply omits
+        // sectionId from the response.
+        'autoAssignSection': autoAssignSection,
       },
       const Duration(minutes: 11),
     );
     return GeneratedWorkspaceIdentity(
       workspaceName: payload.requiredString('workspaceName'),
       branchName: payload.requiredString('branchName'),
+      sectionId: payload.optionalString('sectionId'),
     );
   }