Sync from development - prepare for v0.4.0

CHANGELOG.md

@@ -1,5 +1,42 @@
 # Jackify Changelog
 
+## v0.4.0 - Error Handling Rewrite
+**Release Date:** 2026-02-25
+
+### New Features
+- Structured error handling across GUI and CLI with typed `JackifyError` dialogs (clear message, suggested action, numbered recovery steps, optional technical detail).
+- Structured engine error receiver: stderr JSON errors are parsed and mapped to user-facing error types, with exit-code fallback.
+- Nexus account tier indicator in Settings OAuth (`[Premium]` / `[Free]`) with cached status checks.
+- Modlist metadata support via `.jackify_meta.json`, written after install and used by configure workflows.
+- TTW eligibility workflow expanded:
+  - Configure New / Configure Existing can trigger TTW workflow when eligible.
+  - CLI `configure-modlist` now prompts TTW when eligible.
+- FO3 support in configure workflows, including prefix/registry handling.
+- Standalone MO2 setup in Additional Tasks (GUI and CLI).
+
+### Bug Fixes
+- Proton auto-detection reliability improved, including GE-Proton ranking and fallback behavior.
+- Added detection support for system-packaged Proton layouts (Issue #162).
+- Download stall false positives reduced by checking byte advancement instead of speed readout alone.
+- Flatpak Steam access handling improved with install-directory override support.
+- TTW installer output directory is pre-populated to the modlist location.
+- Unknown game fallback behavior improved so Wine component installation can continue where appropriate.
+
+### Improvements
+- GUI debug log naming standardised to `jackify-debug.log`.
+- Error reporting/logging flow cleaned up to improve user  facing info and hopefully ease support.
+- "Lazy" GUI screen initialization (main menu first, other screens on demand).
+- Proton handling improved with Valve Proton fallback when GE-Proton is unavailable.
+- FNV/FO3/Enderal registry injection now attempts canonical `C:\Program Files (x86)\Steam\steamapps\common\<Game>` paths via in-prefix symlink, with fallback to real `Z:/D:` paths if symlink creation fails. Looking forward to feedback on this one if anyone still has their FNV launcher only show "Install" instead of "Play".
+
+### Engine Updates
+- jackify-engine updated to `0.4.8`.
+- Archive download progress improvements (remaining size + ETA).
+- Download speed reporting reliability improvements on Linux.
+- ZIP extraction fixes for Cyrillic filenames.
+
+---
+
 ## v0.3.0 - Codebase Refactoring
 **Release Date:** 2026-02-06
 
@@ -1200,4 +1237,4 @@ This release completes the logging refactor that was blocking development workfl
 - Modular handler architecture for extensibility.
 
 ## v0.0.09 and Earlier
-See commit history for previous versions.
+See commit history for previous versions.

jackify/__init__.py

@@ -5,4 +5,4 @@ This package provides both CLI and GUI interfaces for managing
 Wabbajack modlists natively on Linux systems.
 """
 
-__version__ = "0.3.0"
+__version__ = "0.4.0"

jackify/backend/core/modlist_operations.py

@@ -171,8 +171,7 @@ class ModlistInstallCLI(
         self.shortcut_handler = ShortcutHandler(steamdeck=self.steamdeck)
         self.context = {}
         # Use standard logging (no file handler)
-        self.logger = logging.getLogger(__name__)
-        self.logger.propagate = False # Prevent duplicate logs if root logger is also configured
+        self.logger = logging.getLogger('jackify-cli')
         
         # Initialize Wabbajack parser for game detection
         self.wabbajack_parser = WabbajackParser()
@@ -238,4 +237,3 @@ class ModlistInstallCLI(
 
         print(auth_display)
         print(f"{COLOR_INFO}----------------------------------------{COLOR_RESET}")
-

jackify/backend/core/modlist_operations_configuration_cli.py

@@ -170,6 +170,7 @@ class ModlistOperationsConfigurationCLIMixin:
                 proc = self._current_process
 
                 buffer = b''
+                inline_progress_active = False
                 while True:
                     chunk = proc.stdout.read(1)
                     if not chunk:
@@ -185,7 +186,16 @@ class ModlistOperationsConfigurationCLIMixin:
                             else:
                                 buffer = b''
                                 continue
-                        print(line, end='')
+                        clean_line = line.rstrip('\r\n')
+                        if clean_line.startswith("Installing files "):
+                            print(f"\r{clean_line}", end='')
+                            sys.stdout.flush()
+                            inline_progress_active = True
+                        else:
+                            if inline_progress_active:
+                                print()
+                                inline_progress_active = False
+                            print(line, end='')
                         buffer = b''
                     elif chunk == b'\r':
                         line = buffer.decode('utf-8', errors='replace')
@@ -196,7 +206,15 @@ class ModlistOperationsConfigurationCLIMixin:
                             else:
                                 buffer = b''
                                 continue
-                        print(line, end='')
+                        clean_line = line.rstrip('\r\n')
+                        if clean_line.startswith("Installing files "):
+                            print(f"\r{clean_line}", end='')
+                            inline_progress_active = True
+                        else:
+                            if inline_progress_active:
+                                print()
+                                inline_progress_active = False
+                            print(line, end='')
                         sys.stdout.flush()
                         buffer = b''
 
@@ -209,8 +227,14 @@ class ModlistOperationsConfigurationCLIMixin:
                         else:
                             line = ''
                     if line:
+                        if inline_progress_active:
+                            print()
+                            inline_progress_active = False
                         print(line, end='')
 
+                if inline_progress_active:
+                    print()
+
                 proc.wait()
                 self._current_process = None
                 if proc.returncode != 0:
@@ -343,7 +367,10 @@ class ModlistOperationsConfigurationCLIMixin:
             if not is_gui_mode:
                 self.logger.debug("configuration_phase: Not in GUI mode, prompting user for configuration...")
                 print("\n" + "-" * 28)
-                print(f"{COLOR_PROMPT}Would you like to add '{shortcut_name}' to Steam and configure it now?{COLOR_RESET}")
+                print(
+                    f"{COLOR_PROMPT}Would you like to add '{shortcut_name}' to Steam and configure it now? "
+                    f"Steam will restart and close any running game.{COLOR_RESET}"
+                )
                 configure_choice = input(f"{COLOR_PROMPT}Configure now? (Y/n): {COLOR_RESET}").strip().lower()
                 self.logger.debug(f"configuration_phase: User choice: '{configure_choice}'")
 
@@ -383,11 +410,30 @@ class ModlistOperationsConfigurationCLIMixin:
                 start_time = time.time()
 
                 def progress_callback(message):
+                    noisy_patterns = (
+                        "using bundled tools directory",
+                        "bundled tools available",
+                        "checking winetricks dependencies",
+                        "(bundled)",
+                        "(system)",
+                        "wget",
+                        "curl",
+                        "aria2c",
+                        "sha256sum",
+                        "cabextract",
+                    )
+                    message_lc = message.lower()
+                    if any(pattern in message_lc for pattern in noisy_patterns):
+                        # Keep dependency/tool chatter in logs only for CLI readability.
+                        self.logger.debug("Automated prefix detail: %s", message)
+                        return
+
                     elapsed = time.time() - start_time
                     hours = int(elapsed // 3600)
                     minutes = int((elapsed % 3600) // 60)
                     seconds = int(elapsed % 60)
                     timestamp = f"[{hours:02d}:{minutes:02d}:{seconds:02d}]"
+                    self.logger.info("Automated prefix progress: %s", message)
                     print(f"{COLOR_INFO}{timestamp} {message}{COLOR_RESET}")
 
                 try:
@@ -534,6 +580,58 @@ class ModlistOperationsConfigurationCLIMixin:
             if configuration_success:
                 print(f"{COLOR_SUCCESS}Configuration completed successfully!{COLOR_RESET}")
                 self.logger.info("Post-installation configuration completed successfully")
+                try:
+                    # Ensure CLI install flow gets the same VNV automation behavior as GUI.
+                    from jackify.backend.services.vnv_integration_helper import run_vnv_automation_if_applicable
+                    from jackify.backend.services.automated_prefix_service import AutomatedPrefixService
+
+                    modlist_name_for_automation = self.context.get('modlist_name') or shortcut_name or ""
+                    def _confirm_vnv(description: str) -> bool:
+                        print(f"\n{description}\n")
+                        try:
+                            user_input = input(f"{COLOR_PROMPT}Run VNV post-install automation now? (Y/n): {COLOR_RESET}").strip().lower()
+                        except (EOFError, KeyboardInterrupt):
+                            return False
+                        return user_input in ("", "y", "yes")
+                    def _manual_vnv_file(title: str, instructions: str):
+                        print(f"\n{COLOR_WARNING}{title}{COLOR_RESET}")
+                        print(instructions)
+                        try:
+                            file_input = input(f"{COLOR_PROMPT}Path to downloaded file: {COLOR_RESET}").strip()
+                        except (EOFError, KeyboardInterrupt):
+                            return None
+                        if not file_input:
+                            return None
+                        selected = Path(file_input).expanduser().resolve()
+                        return selected if selected.exists() else None
+                    automation_ran, vnv_error = run_vnv_automation_if_applicable(
+                        modlist_name=modlist_name_for_automation,
+                        modlist_install_location=Path(install_dir_str),
+                        game_root=None,  # Auto-detect from modlist structure.
+                        ttw_installer_path=AutomatedPrefixService.get_ttw_installer_path(),
+                        progress_callback=lambda msg: print(msg),
+                        manual_file_callback=_manual_vnv_file,
+                        confirmation_callback=_confirm_vnv,
+                    )
+                    if automation_ran and not vnv_error:
+                        print(f"{COLOR_INFO}VNV post-install automation completed.{COLOR_RESET}")
+                    if vnv_error:
+                        print(f"{COLOR_WARNING}VNV automation encountered an error: {vnv_error}{COLOR_RESET}")
+                        print(f"{COLOR_INFO}You can complete these steps manually by following: https://vivanewvegas.moddinglinked.com/wabbajack.html{COLOR_RESET}")
+                except Exception as vnv_err:
+                    self.logger.error("VNV post-install automation failed: %s", vnv_err, exc_info=True)
+                    print(f"{COLOR_WARNING}VNV automation could not be completed. Check logs for details.{COLOR_RESET}")
+                try:
+                    # v0.4.0 contract: offer TTW flow for eligible FNV lists (e.g., Begin Again).
+                    from jackify.backend.handlers.modlist_install_cli_ttw import prompt_ttw_if_eligible
+
+                    prompt_ttw_if_eligible(
+                        install_dir_str,
+                        self.context.get('modlist_name') or shortcut_name or "",
+                    )
+                except Exception as ttw_err:
+                    self.logger.error("TTW post-install prompt failed: %s", ttw_err, exc_info=True)
+                    print(f"{COLOR_WARNING}TTW integration prompt failed. Check logs for details.{COLOR_RESET}")
             else:
                 print(f"{COLOR_WARNING}Configuration had some issues but completed.{COLOR_RESET}")
                 self.logger.warning("Post-installation configuration had issues")

jackify/backend/handlers/engine_monitor.py

@@ -92,7 +92,7 @@ class EnginePerformanceMonitor:
             # Also monitor the parent Python process for comparison
             try:
                 self._parent_process = psutil.Process(os.getpid())
-            except:
+            except Exception:
                 self._parent_process = None
                 
             self._monitoring = True
@@ -220,7 +220,7 @@ class EnginePerformanceMonitor:
                 parent_cpu_percent = self._parent_process.cpu_percent()
                 parent_memory_info = self._parent_process.memory_info()
                 parent_memory_mb = parent_memory_info.rss / (1024 * 1024)
-            except:
+            except Exception:
                 pass
         
         # Get I/O info

jackify/backend/handlers/game_detector.py

@@ -15,6 +15,7 @@ class GameDetector:
             'skyrim': ['Skyrim Special Edition', 'Skyrim'],
             'fallout4': ['Fallout 4'],
             'falloutnv': ['Fallout New Vegas'],
+            'fallout3': ['Fallout 3'],
             'oblivion': ['Oblivion'],
             'starfield': ['Starfield'],
             'oblivion_remastered': ['Oblivion Remastered']
@@ -34,6 +35,8 @@ class GameDetector:
             return 'fallout4'
         elif any(keyword in modlist_lower for keyword in ['fallout new vegas', 'fonv', 'fnv', 'new vegas', 'nvse']):
             return 'falloutnv'
+        elif any(keyword in modlist_lower for keyword in ['fallout 3', 'fo3', 'fallout3', 'fose']):
+            return 'fallout3'
         elif any(keyword in modlist_lower for keyword in ['oblivion', 'obse', 'shivering isles']):
             return 'oblivion'
         elif any(keyword in modlist_lower for keyword in ['starfield', 'sf', 'starfieldse']):
@@ -108,6 +111,12 @@ class GameDetector:
                 'required_dlc': [],
                 'compatibility_tools': ['protontricks', 'winetricks']
             },
+            'fallout3': {
+                'launcher': 'FOSE',
+                'min_proton_version': '5.0',
+                'required_dlc': [],
+                'compatibility_tools': ['protontricks', 'winetricks']
+            },
             'oblivion': {
                 'launcher': 'OBSE',
                 'min_proton_version': '5.0',
@@ -173,6 +182,7 @@ class GameDetector:
             'skyrim': 'SKSE',
             'fallout4': 'F4SE', 
             'falloutnv': 'NVSE',
+            'fallout3': 'FOSE',
             'oblivion': 'OBSE',
             'starfield': 'SFSE',
             'oblivion_remastered': 'OBSE'
@@ -205,6 +215,7 @@ class GameDetector:
             'skyrim': ['vcrun2019', 'dotnet48', 'dxvk'],
             'fallout4': ['vcrun2019', 'dotnet48', 'dxvk'],
             'falloutnv': ['vcrun2019', 'dotnet48'],
+            'fallout3': ['vcrun2019', 'dotnet48'],
             'oblivion': ['vcrun2019', 'dotnet48'],
             'starfield': ['vcrun2022', 'dotnet6', 'dotnet7', 'dxvk'],
             'oblivion_remastered': ['vcrun2022', 'dotnet6', 'dotnet7', 'dxvk']
@@ -222,6 +233,7 @@ class GameDetector:
             'skyrim': ['SkyrimSE.exe', 'Skyrim.exe'],
             'fallout4': ['Fallout4.exe'],
             'falloutnv': ['FalloutNV.exe'],
+            'fallout3': ['Fallout3.exe'],
             'oblivion': ['Oblivion.exe']
         }
         
@@ -250,6 +262,11 @@ class GameDetector:
                 'config_dirs': ['Data', 'Saves'],
                 'registry_keys': ['HKEY_LOCAL_MACHINE\\SOFTWARE\\Bethesda Softworks\\FalloutNV']
             },
+            'fallout3': {
+                'ini_files': ['Fallout.ini', 'FalloutPrefs.ini'],
+                'config_dirs': ['Data', 'Saves'],
+                'registry_keys': ['HKEY_LOCAL_MACHINE\\SOFTWARE\\Bethesda Softworks\\Fallout3']
+            },
             'oblivion': {
                 'ini_files': ['Oblivion.ini'],
                 'config_dirs': ['Data', 'Saves'],

jackify/backend/handlers/menu_handler.py

@@ -32,7 +32,6 @@ from .resolution_handler import ResolutionHandler
 from .protontricks_handler import ProtontricksHandler
 from .path_handler import PathHandler
 from .vdf_handler import VDFHandler
-from .mo2_handler import MO2Handler
 from jackify.shared.ui_utils import print_section_header
 from .completers import path_completer
 
@@ -72,7 +71,6 @@ class MenuHandler:
             steamdeck=self.config_handler.settings.get('steamdeck', False),
             verbose=False
         )
-        self.mo2_handler = MO2Handler(self)
     
     def display_banner(self):
         """Display the application banner - DEPRECATED: Banner display should be handled by frontend"""

jackify/backend/handlers/menu_handler_modlist.py

@@ -82,22 +82,6 @@ class ModlistMenuHandler:
                 print("\nInvalid selection. Please try again.")
                 input("\nPress Enter to continue...")
 
-    def _display_manual_proton_steps(self, modlist_name):
-        """Displays the detailed manual steps required for Proton setup."""
-        # Keep these as print for clear user instructions
-        print(f"\n{COLOR_PROMPT}--- Manual Proton Setup Required ---{COLOR_RESET}") 
-        print("Please complete the following steps in Steam:")
-        print(f"  1. Locate the '{COLOR_INFO}{modlist_name}{COLOR_RESET}' entry in your Steam Library")
-        print("  2. Right-click and select 'Properties'")
-        print("  3. Switch to the 'Compatibility' tab")
-        print("  4. Check the box labeled 'Force the use of a specific Steam Play compatibility tool'")
-        print("  5. Select 'Proton - Experimental' from the dropdown menu")
-        print("  6. Close the Properties window")
-        print(f"  7. Launch '{COLOR_INFO}{modlist_name}{COLOR_RESET}' from your Steam Library")
-        print("  8. If Mod Organizer opens or produces any error message, that's normal")
-        print("  9. No matter what,CLOSE Mod Organizer completely and return here")
-        print(f"{COLOR_PROMPT}------------------------------------{COLOR_RESET}")
-
     def _get_mo2_path(self) -> Optional[str]:
         """
         Get the path to ModOrganizer.exe from user input.
@@ -269,6 +253,16 @@ class ModlistMenuHandler:
                 
                 # Use automated prefix service for modern workflow
                 print(f"\n{COLOR_INFO}Using automated Steam setup workflow...{COLOR_RESET}")
+
+                # CLI safety warning: this workflow will restart Steam as part of shortcut/prefix setup.
+                print("\n" + "-" * 28)
+                print(
+                    f"{COLOR_PROMPT}Configure New Modlist will restart Steam and close any running game.{COLOR_RESET}"
+                )
+                continue_choice = input(f"{COLOR_PROMPT}Continue with Configure New now? (Y/n): {COLOR_RESET}").strip().lower()
+                if continue_choice == 'n':
+                    print(f"{COLOR_INFO}Configuration cancelled before Steam restart.{COLOR_RESET}")
+                    return True
                 
                 from ..services.automated_prefix_service import AutomatedPrefixService
                 prefix_service = AutomatedPrefixService()
@@ -441,7 +435,15 @@ class ModlistMenuHandler:
         Shared configuration phase for both new and existing modlists.
         Expects context dict with keys: name, appid, path (at minimum).
         """
+        import os
         self.logger.debug(f"[DEBUG] Entering run_modlist_configuration_phase with context: {context}")
+        # Write nxmhandler.ini to suppress MO2's NXM Handling popup on first launch.
+        # This must happen before MO2 runs for the first time, so do it here rather than
+        # relying on callers to remember.
+        _mo2_exe = context.get('mo2_exe_path') or os.path.join(context.get('path', ''), 'ModOrganizer.exe')
+        _mo2_dir = os.path.dirname(_mo2_exe)
+        if _mo2_dir and os.path.isdir(_mo2_dir):
+            self.shortcut_handler.write_nxmhandler_ini(_mo2_dir, _mo2_exe)
         # Robust AppID lookup for GUI/CLI: if appid missing but mo2_exe_path present, look it up
         if 'appid' not in context or not context.get('appid'):
             if 'mo2_exe_path' in context and context['mo2_exe_path']:
@@ -454,7 +456,6 @@ class ModlistMenuHandler:
         self.logger.debug(f"[DEBUG] set_modlist returned: {set_modlist_result}")
 
         # Check GUI mode early to avoid input() calls in GUI context
-        import os
         gui_mode = os.environ.get('JACKIFY_GUI_MODE') == '1'
 
         if not set_modlist_result:
@@ -501,10 +502,22 @@ class ModlistMenuHandler:
         self.logger.info(f"Starting configuration steps for {context.get('name')}")
         print()  # Add padding before status line
         status_line = ""
-        import os
         gui_mode = os.environ.get('JACKIFY_GUI_MODE') == '1'
         def update_status(msg):
             nonlocal status_line
+            filtered_prefixes = (
+                "Using bundled tools directory (after system PATH):",
+                "Bundled tools available:",
+            )
+            msg_lc = msg.lower().strip()
+            if msg.startswith(filtered_prefixes):
+                return
+            # Suppress per-tool dependency detail lines like:
+            # "  wget: /usr/bin/wget (system)" / "  7z: ... (bundled)".
+            if msg.startswith("  ") and (
+                "(system)" in msg_lc or "(bundled)" in msg_lc or "not found" in msg_lc
+            ):
+                return
             if status_line:
                 print("\r" + " " * len(status_line), end="\r")
             if gui_mode:
@@ -526,28 +539,29 @@ class ModlistMenuHandler:
         if status_line:
             print()
         
-        # Configure ENB for Linux compatibility (non-blocking, same as GUI)
+        # Configure ENB for Linux compatibility (non-blocking).
+        # In GUI mode, modlist_service.py handles ENB after this function returns,
+        # so skip here to avoid running it twice.
         enb_detected = False
-        try:
-            from ..handlers.enb_handler import ENBHandler
-            from pathlib import Path
-            
-            enb_handler = ENBHandler()
-            install_dir = Path(context.get('path', ''))
-            
-            if install_dir.exists():
-                enb_success, enb_message, enb_detected = enb_handler.configure_enb_for_linux(install_dir)
-                
-                if enb_message:
-                    if enb_success:
-                        self.logger.info(enb_message)
-                        update_status(enb_message)
-                    else:
-                        self.logger.warning(enb_message)
-                        # Non-blocking: continue workflow even if ENB config fails
-        except Exception as e:
-            self.logger.warning(f"ENB configuration skipped due to error: {e}")
-            # Continue workflow - ENB config is optional
+        if not gui_mode:
+            try:
+                from ..handlers.enb_handler import ENBHandler
+                from pathlib import Path
+
+                enb_handler = ENBHandler()
+                install_dir = Path(context.get('path', ''))
+
+                if install_dir.exists():
+                    enb_success, enb_message, enb_detected = enb_handler.configure_enb_for_linux(install_dir)
+
+                    if enb_message:
+                        if enb_success:
+                            self.logger.info(enb_message)
+                            update_status(enb_message)
+                        else:
+                            self.logger.warning(enb_message)
+            except Exception as e:
+                self.logger.warning(f"ENB configuration skipped due to error: {e}")
 
         # Run modlist-specific post-install automation (e.g., VNV) before showing completion
         # Only in CLI mode - GUI handles this in install_modlist.py
@@ -560,17 +574,37 @@ class ModlistMenuHandler:
             modlist_path = Path(context.get('path', ''))
 
             try:
-                print("")
-                print("Running VNV post-install automation...")
+                def _confirm_vnv(description: str) -> bool:
+                    print(f"\n{description}\n")
+                    try:
+                        user_input = input(f"{COLOR_PROMPT}Run VNV post-install automation now? (Y/n): {COLOR_RESET}").strip().lower()
+                    except (EOFError, KeyboardInterrupt):
+                        return False
+                    return user_input in ("", "y", "yes")
+
+                def _manual_vnv_file(title: str, instructions: str):
+                    print(f"\n{COLOR_WARNING}{title}{COLOR_RESET}")
+                    print(instructions)
+                    try:
+                        file_input = input(f"{COLOR_PROMPT}Path to downloaded file: {COLOR_RESET}").strip()
+                    except (EOFError, KeyboardInterrupt):
+                        return None
+                    if not file_input:
+                        return None
+                    selected = Path(file_input).expanduser().resolve()
+                    return selected if selected.exists() else None
+
                 automation_ran, error = run_vnv_automation_if_applicable(
                     modlist_name=modlist_name,
                     modlist_install_location=modlist_path,
                     game_root=None,  # Will be auto-detected
                     ttw_installer_path=AutomatedPrefixService.get_ttw_installer_path(),
                     progress_callback=lambda msg: print(msg),
-                    manual_file_callback=None,  # CLI doesn't support manual file callback yet
-                    confirmation_callback=None  # Will use default confirmation in CLI
+                    manual_file_callback=_manual_vnv_file,
+                    confirmation_callback=_confirm_vnv
                 )
+                if automation_ran and not error:
+                    print(f"{COLOR_INFO}VNV post-install automation completed.{COLOR_RESET}")
                 if error:
                     print(f"{COLOR_WARNING}VNV automation encountered an error: {error}{COLOR_RESET}")
                     print(f"{COLOR_INFO}You can complete these steps manually by following: https://vivanewvegas.moddinglinked.com/wabbajack.html{COLOR_RESET}")
@@ -578,6 +612,22 @@ class ModlistMenuHandler:
                 self.logger.debug(f"VNV automation check skipped: {e}")
                 # Not an error - just means VNV automation wasn't applicable
 
+        if not gui_mode:
+            try:
+                from jackify.backend.handlers.modlist_install_cli_ttw import prompt_ttw_if_eligible
+
+                prompt_ttw_if_eligible(
+                    context.get('path', ''),
+                    context.get('name', '') or '',
+                )
+            except Exception as ttw_err:
+                self.logger.error("TTW post-config prompt failed: %s", ttw_err, exc_info=True)
+                print(f"{COLOR_WARNING}TTW integration prompt failed. Check logs for details.{COLOR_RESET}")
+
+        is_existing_flow = context.get("modlist_source") == "existing"
+        completion_title = "Modlist Configuration complete!" if is_existing_flow else "Modlist Install and Configuration complete!"
+        completion_log_file = "Configure_Existing_Modlist_workflow.log" if is_existing_flow else "Configure_New_Modlist_workflow.log"
+
         print("")
         print("")
         print("")  # Extra blank line before completion
@@ -585,7 +635,7 @@ class ModlistMenuHandler:
         print("= Configuration phase complete =")
         print("=" * 35)
         print("")
-        print("Modlist Install and Configuration complete!")
+        print(completion_title)
         print(f"• You should now be able to Launch '{context.get('name')}' through Steam")
         print("• Congratulations and enjoy the game!")
         print("")
@@ -608,7 +658,7 @@ class ModlistMenuHandler:
             # No ENB detected - no warning needed
             pass
         from jackify.shared.paths import get_jackify_logs_dir
-        print(f"Detailed log available at: {get_jackify_logs_dir()}/Configure_New_Modlist_workflow.log")
+        print(f"Detailed log available at: {get_jackify_logs_dir()}/{completion_log_file}")
         # Only wait for input in CLI mode, not GUI mode
         if not gui_mode:
             input(f"{COLOR_PROMPT}Press Enter to return to the menu...{COLOR_RESET}")

jackify/backend/handlers/mo2_handler.py

@@ -1,188 +0,0 @@
-import shutil
-import subprocess
-import requests
-from pathlib import Path
-import re
-import time
-import os
-import logging
-from .ui_colors import COLOR_PROMPT, COLOR_SELECTION, COLOR_RESET, COLOR_INFO, COLOR_ERROR, COLOR_SUCCESS, COLOR_WARNING
-from .status_utils import show_status, clear_status
-from jackify.shared.ui_utils import print_section_header, print_subsection_header
-
-logger = logging.getLogger(__name__)
-
-class MO2Handler:
-    """
-    Handles downloading and installing Mod Organizer 2 (MO2) using system 7z.
-    """
-    def __init__(self, menu_handler):
-        self.menu_handler = menu_handler
-        # Import shortcut handler from menu_handler if available
-        self.shortcut_handler = getattr(menu_handler, 'shortcut_handler', None)
-        self.logger = logging.getLogger(__name__)
-
-    def _is_dangerous_path(self, path: Path) -> bool:
-        # Block /, /home, /root, and the user's home directory
-        home = Path.home().resolve()
-        dangerous = [Path('/'), Path('/home'), Path('/root'), home]
-        return any(path.resolve() == d for d in dangerous)
-
-    def install_mo2(self):
-        os.system('cls' if os.name == 'nt' else 'clear')
-        # Banner display handled by frontend
-        print_section_header('Mod Organizer 2 Installation')
-        # 1. Check for 7z
-        if not shutil.which('7z'):
-            print(f"{COLOR_ERROR}[ERROR] 7z is not installed. Please install it (e.g., sudo apt install p7zip-full).{COLOR_RESET}")
-            return False
-        # 2. Prompt for install location
-        default_dir = Path.home() / "ModOrganizer2"
-        prompt = f"Enter the full path where Mod Organizer 2 should be installed (default: {default_dir}, enter 'q' to cancel)"
-        install_dir = self.menu_handler.get_directory_path(
-            prompt_message=prompt,
-            default_path=default_dir,
-            create_if_missing=False,
-            no_header=True
-        )
-        if not install_dir:
-            print(f"\n{COLOR_INFO}Installation cancelled by user.{COLOR_RESET}\n")
-            return False
-        # Safety: Block dangerous paths
-        if self._is_dangerous_path(install_dir):
-            print(f"\n{COLOR_ERROR}Refusing to install to a dangerous directory: {install_dir}{COLOR_RESET}\n")
-            return False
-        # 3. Ask if user wants to add MO2 to Steam
-        add_to_steam = input(f"Add Mod Organizer 2 as a custom Steam shortcut for Proton? (Y/n): ").strip().lower()
-        add_to_steam = (add_to_steam == '' or add_to_steam.startswith('y'))
-        shortcut_name = None
-        if add_to_steam:
-            shortcut_name = input(f"Enter a name for your new Steam shortcut (default: Mod Organizer 2): ").strip()
-            if not shortcut_name:
-                shortcut_name = "Mod Organizer 2"
-        print_subsection_header('Configuration Phase')
-        time.sleep(0.5)
-        # 4. Create directory if needed, handle existing contents
-        if not install_dir.exists():
-            try:
-                install_dir.mkdir(parents=True, exist_ok=True)
-                show_status(f"Created directory: {install_dir}")
-            except Exception as e:
-                print(f"{COLOR_ERROR}[ERROR] Could not create directory: {e}{COLOR_RESET}")
-                return False
-        else:
-            files = list(install_dir.iterdir())
-            if files:
-                print(f"{COLOR_WARNING}The directory '{install_dir}' is not empty.{COLOR_RESET}")
-                print("Warning: This will permanently delete all files in the folder. Type 'DELETE' to confirm:")
-                confirm = input("").strip()
-                if confirm != 'DELETE':
-                    print(f"{COLOR_INFO}Cancelled by user. Please choose a different directory if you want to keep existing files.{COLOR_RESET}\n")
-                    return False
-                for f in files:
-                    try:
-                        if f.is_dir():
-                            shutil.rmtree(f)
-                        else:
-                            f.unlink()
-                    except Exception as e:
-                        print(f"{COLOR_ERROR}Failed to delete {f}: {e}{COLOR_RESET}")
-                show_status(f"Deleted all contents of {install_dir}")
-
-        # 5. Fetch latest MO2 release info from GitHub
-        show_status("Fetching latest Mod Organizer 2 release info...")
-        try:
-            response = requests.get("https://api.github.com/repos/ModOrganizer2/modorganizer/releases/latest", timeout=15, verify=True)
-            response.raise_for_status()
-            release = response.json()
-        except Exception as e:
-            print(f"{COLOR_ERROR}[ERROR] Failed to fetch MO2 release info: {e}{COLOR_RESET}")
-            return False
-
-        # 6. Find the correct .7z asset (exclude -pdbs, -src, etc)
-        asset = None
-        for a in release.get('assets', []):
-            name = a['name']
-            if re.match(r"Mod\.Organizer-\d+\.\d+(\.\d+)?\.7z$", name):
-                asset = a
-                break
-        if not asset:
-            print(f"{COLOR_ERROR}[ERROR] Could not find main MO2 .7z asset in latest release.{COLOR_RESET}")
-            return False
-
-        # 7. Download the archive
-        show_status(f"Downloading {asset['name']}...")
-        archive_path = install_dir / asset['name']
-        try:
-            with requests.get(asset['browser_download_url'], stream=True, timeout=60, verify=True) as r:
-                r.raise_for_status()
-                with open(archive_path, 'wb') as f:
-                    for chunk in r.iter_content(chunk_size=8192):
-                        f.write(chunk)
-        except Exception as e:
-            print(f"{COLOR_ERROR}[ERROR] Failed to download MO2 archive: {e}{COLOR_RESET}")
-            return False
-
-        # 8. Extract using 7z (suppress noisy output)
-        show_status(f"Extracting to {install_dir}...")
-        try:
-            result = subprocess.run(['7z', 'x', str(archive_path), f'-o{install_dir}'], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
-            if result.returncode != 0:
-                print(f"{COLOR_ERROR}[ERROR] Extraction failed: {result.stderr.decode(errors='ignore')}{COLOR_RESET}")
-                return False
-        except Exception as e:
-            print(f"{COLOR_ERROR}[ERROR] Extraction failed: {e}{COLOR_RESET}")
-            return False
-
-        # 9. Validate extraction
-        mo2_exe = next(install_dir.glob('**/ModOrganizer.exe'), None)
-        if not mo2_exe:
-            print(f"{COLOR_ERROR}[ERROR] ModOrganizer.exe not found after extraction. Please check extraction.{COLOR_RESET}")
-            return False
-        else:
-            show_status(f"MO2 installed at: {mo2_exe.parent}")
-
-        # 10. Add to Steam if requested
-        if add_to_steam and self.shortcut_handler:
-            show_status("Creating Steam shortcut...")
-            try:
-                from ..services.native_steam_service import NativeSteamService
-                steam_service = NativeSteamService()
-                
-                success, app_id = steam_service.create_shortcut_with_proton(
-                    app_name=shortcut_name,
-                    exe_path=str(mo2_exe),
-                    start_dir=str(mo2_exe.parent),
-                    launch_options="%command%",
-                    tags=["Jackify"],
-                    proton_version="proton_experimental"
-                )
-                if not success or not app_id:
-                    print(f"{COLOR_ERROR}[ERROR] Failed to create Steam shortcut.{COLOR_RESET}")
-                else:
-                    show_status(f"Steam shortcut created for '{COLOR_INFO}{shortcut_name}{COLOR_RESET}'.")
-                    # Restart Steam and show manual steps (reuse logic from Configure Modlist)
-                    print("\n───────────────────────────────────────────────────────────────────")
-                    print(f"{COLOR_INFO}Important:{COLOR_RESET} Steam needs to restart to detect the new shortcut.")
-                    print("This process involves several manual steps after the restart.")
-                    restart_choice = input(f"\n{COLOR_PROMPT}Restart Steam automatically now? (Y/n): {COLOR_RESET}").strip().lower()
-                    if restart_choice != 'n':
-                        if hasattr(self.shortcut_handler, 'secure_steam_restart'):
-                            print("Restarting Steam...")
-                            self.shortcut_handler.secure_steam_restart()
-                    print("\nAfter restarting, you MUST perform the manual Proton setup steps:")
-                    print(f"  1. Locate '{COLOR_INFO}{shortcut_name}{COLOR_RESET}' in your Steam Library")
-                    print("  2. Right-click and select 'Properties'")
-                    print("  3. Switch to the 'Compatibility' tab")
-                    print("  4. Check 'Force the use of a specific Steam Play compatibility tool'")
-                    print("  5. Select 'Proton - Experimental' from the dropdown menu")
-                    print("  6. Close the Properties window")
-                    print(f"  7. Launch '{COLOR_INFO}{shortcut_name}{COLOR_RESET}' from your Steam Library")
-                    print("  8. If Mod Organizer opens or produces any error message, that's normal")
-                    print("  9. CLOSE Mod Organizer completely and return here")
-                    print("───────────────────────────────────────────────────────────────────\n")
-            except Exception as e:
-                print(f"{COLOR_ERROR}[ERROR] Failed to create Steam shortcut: {e}{COLOR_RESET}")
-
-        print(f"{COLOR_SUCCESS}Mod Organizer 2 has been installed successfully!{COLOR_RESET}\n")
-        return True 

jackify/backend/handlers/modlist_detection.py

@@ -329,6 +329,9 @@ class ModlistDetectionMixin:
                     if 'nvse' in content or 'nvse_loader' in content or 'fallout new vegas' in content or 'falloutnv' in content:
                         self.logger.info("Detected FNV via ModOrganizer.ini markers")
                         return "fnv"
+                    if 'fose' in content or 'fose_loader' in content or ('fallout 3' in content and 'fallout 4' not in content):
+                        self.logger.info("Detected FO3 via ModOrganizer.ini markers")
+                        return "fo3"
                     if any(pattern in content for pattern in ['enderal launcher', 'enderal.exe', 'enderal launcher.exe', 'enderalsteam']):
                         self.logger.info("Detected Enderal via ModOrganizer.ini markers")
                         return "enderal"
@@ -353,6 +356,10 @@ class ModlistDetectionMixin:
             if nvse_loader.exists():
                 self.logger.info(f"Detected FNV modlist: found nvse_loader.exe in '{base}'")
                 return "fnv"
+            fose_loader = base / "fose_loader.exe"
+            if fose_loader.exists():
+                self.logger.info(f"Detected FO3 modlist: found fose_loader.exe in '{base}'")
+                return "fo3"
             enderal_launcher = base / "Enderal Launcher.exe"
             if enderal_launcher.exists():
                 self.logger.info(f"Detected Enderal modlist: found Enderal Launcher.exe in '{base}'")
@@ -366,6 +373,9 @@ class ModlistDetectionMixin:
                 if 'fallout new vegas' in gt or gt == 'fnv':
                     self.logger.info("Heuristic detection: game_var indicates FNV")
                     return "fnv"
+                if 'fallout 3' in gt or gt == 'fo3':
+                    self.logger.info("Heuristic detection: game_var indicates FO3")
+                    return "fo3"
                 if 'enderal' in gt:
                     self.logger.info("Heuristic detection: game_var indicates Enderal")
                     return "enderal"

jackify/backend/handlers/modlist_install_cli_configuration.py

@@ -258,6 +258,7 @@ class ModlistInstallCLIConfigurationMixin:
                 try:
                     # Read output in binary mode to properly handle carriage returns
                     buffer = b''
+                    inline_progress_active = False
                     last_progress_time = time.time()
                     
                     while True:
@@ -282,7 +283,16 @@ class ModlistInstallCLIConfigurationMixin:
                                     continue
                             # Enhance Nexus download errors with modlist context
                             enhanced_line = self._enhance_nexus_error(line)
-                            print(enhanced_line, end='')
+                            clean_line = enhanced_line.rstrip('\r\n')
+                            if clean_line.startswith("Installing files "):
+                                print(f"\r{clean_line}", end='')
+                                sys.stdout.flush()
+                                inline_progress_active = True
+                            else:
+                                if inline_progress_active:
+                                    print()
+                                    inline_progress_active = False
+                                print(enhanced_line, end='')
                             buffer = b''
                             last_progress_time = time.time()
                         elif chunk == b'\r':
@@ -300,7 +310,15 @@ class ModlistInstallCLIConfigurationMixin:
                                     continue
                             # Enhance Nexus download errors with modlist context
                             enhanced_line = self._enhance_nexus_error(line)
-                            print(enhanced_line, end='')
+                            clean_line = enhanced_line.rstrip('\r\n')
+                            if clean_line.startswith("Installing files "):
+                                print(f"\r{clean_line}", end='')
+                                inline_progress_active = True
+                            else:
+                                if inline_progress_active:
+                                    print()
+                                    inline_progress_active = False
+                                print(enhanced_line, end='')
                             sys.stdout.flush()
                             buffer = b''
                             last_progress_time = time.time()
@@ -314,7 +332,13 @@ class ModlistInstallCLIConfigurationMixin:
                     # Print any remaining buffer content
                     if buffer:
                         line = buffer.decode('utf-8', errors='replace')
+                        if inline_progress_active:
+                            print()
+                            inline_progress_active = False
                         print(line, end='')
+
+                    if inline_progress_active:
+                        print()
                     
                     proc.wait()
                     
@@ -415,7 +439,10 @@ class ModlistInstallCLIConfigurationMixin:
             if not is_gui_mode:
                 # Prompt user if they want to configure Steam shortcut now
                 print("\n" + "-" * 28)
-                print(f"{COLOR_PROMPT}Would you like to add '{shortcut_name}' to Steam and configure it now?{COLOR_RESET}")
+                print(
+                    f"{COLOR_PROMPT}Would you like to add '{shortcut_name}' to Steam and configure it now? "
+                    f"Steam will restart and close any running game.{COLOR_RESET}"
+                )
                 configure_choice = input(f"{COLOR_PROMPT}Configure now? (Y/n): {COLOR_RESET}").strip().lower()
                 
                 if configure_choice == 'n':
@@ -424,71 +451,61 @@ class ModlistInstallCLIConfigurationMixin:
             
             # Proceed with Steam configuration
             self.logger.info(f"Starting Steam configuration for '{shortcut_name}'")
-            
-            # Step 1: Create Steam shortcut first
+
             mo2_exe_path = os.path.join(install_dir_str, 'ModOrganizer.exe')
-            
-            # Use the working shortcut creation process from legacy code
+
             from .shortcut_handler import ShortcutHandler
             shortcut_handler = ShortcutHandler(steamdeck=self.steamdeck, verbose=False)
-            
-            # Create nxmhandler.ini to suppress NXM popup
             shortcut_handler.write_nxmhandler_ini(install_dir_str, mo2_exe_path)
-            
-            # Create shortcut with working NativeSteamService
-            from ..services.native_steam_service import NativeSteamService
-            steam_service = NativeSteamService()
-            
-            success, app_id = steam_service.create_shortcut_with_proton(
-                app_name=shortcut_name,
-                exe_path=mo2_exe_path,
-                start_dir=os.path.dirname(mo2_exe_path),
-                launch_options="%command%",
-                tags=["Jackify"],
-                proton_version="proton_experimental"
-            )
-            
-            if not success or not app_id:
-                self.logger.error("Failed to create Steam shortcut")
-                print(f"{COLOR_ERROR}Failed to create Steam shortcut. Check logs for details.{COLOR_RESET}")
-                return
-            
-            # Step 2: Handle Steam restart and manual steps (if not in GUI mode)
-            if not is_gui_mode:
-                print(f"\n{COLOR_INFO}Steam shortcut created successfully!{COLOR_RESET}")
-                print("Steam needs to restart to detect the new shortcut.")
-                
-                restart_choice = input("\nRestart Steam automatically now? (Y/n): ").strip().lower()
-                if restart_choice == 'n':
-                    print("\nPlease restart Steam manually and complete the Proton setup steps.")
-                    print("You can configure this modlist later using 'Configure Existing Modlist'.")
+
+            from ..services.automated_prefix_service import AutomatedPrefixService
+            prefix_service = AutomatedPrefixService()
+
+            def _cli_progress(message):
+                noisy_patterns = (
+                    "using bundled tools directory",
+                    "bundled tools available",
+                    "checking winetricks dependencies",
+                    "(bundled)",
+                    "(system)",
+                    "wget",
+                    "curl",
+                    "aria2c",
+                    "sha256sum",
+                    "cabextract",
+                )
+                message_lc = message.lower()
+                if any(pattern in message_lc for pattern in noisy_patterns):
+                    self.logger.debug("Automated prefix detail: %s", message)
                     return
-                
-                # Restart Steam
-                print("\nRestarting Steam...")
-                if shortcut_handler.secure_steam_restart():
-                    print(f"{COLOR_INFO}Steam restarted successfully.{COLOR_RESET}")
-                    
-                    # Display manual Proton steps
-                    from .menu_handler import ModlistMenuHandler
-                    from .config_handler import ConfigHandler
-                    config_handler = ConfigHandler()
-                    menu_handler = ModlistMenuHandler(config_handler)
-                    menu_handler._display_manual_proton_steps(shortcut_name)
-                    
-                    input(f"\n{COLOR_PROMPT}Once you have completed ALL the steps above, press Enter to continue...{COLOR_RESET}")
-                    
-                    # Get the updated AppID after launch
-                    new_app_id = shortcut_handler.get_appid_for_shortcut(shortcut_name, mo2_exe_path)
-                    if new_app_id and new_app_id.isdigit() and int(new_app_id) > 0:
-                        app_id = new_app_id
-                    else:
-                        print(f"{COLOR_ERROR}Could not find valid AppID after launch. Configuration may not work properly.{COLOR_RESET}")
+                print(f"{COLOR_INFO}{message}{COLOR_RESET}")
+
+            try:
+                _result = prefix_service.run_working_workflow(
+                    shortcut_name, install_dir_str, mo2_exe_path, _cli_progress, steamdeck=self.steamdeck
+                )
+            except Exception as _wf_err:
+                from jackify.shared.errors import JackifyError
+                if isinstance(_wf_err, JackifyError):
+                    self.logger.error(f"Automated prefix setup failed: {_wf_err.message}")
+                    print(f"{COLOR_ERROR}{_wf_err.message}{COLOR_RESET}")
+                    if _wf_err.suggestion:
+                        print(f"{COLOR_INFO}What to do: {_wf_err.suggestion}{COLOR_RESET}")
                 else:
-                    print(f"{COLOR_ERROR}Steam restart failed. Please restart manually and configure later.{COLOR_RESET}")
-                    return
-            
-            # Step 3: Build configuration context with the AppID
+                    self.logger.error(f"Automated prefix setup failed: {_wf_err}")
+                    print(f"{COLOR_ERROR}Automated prefix setup failed. Check logs for details.{COLOR_RESET}")
+                return
+
+            if isinstance(_result, tuple) and len(_result) == 4:
+                success, _prefix_path, app_id, _last_ts = _result
+            else:
+                success, app_id = False, None
+
+            if not success:
+                self.logger.error("Automated prefix setup failed")
+                print(f"{COLOR_ERROR}Automated prefix setup failed. Check logs for details.{COLOR_RESET}")
+                return
+
             config_context = {
                 'name': shortcut_name,
                 'appid': app_id,
@@ -496,17 +513,14 @@ class ModlistInstallCLIConfigurationMixin:
                 'mo2_exe_path': mo2_exe_path,
                 'resolution': self.context.get('resolution'),
                 'skip_confirmation': is_gui_mode,
-                'manual_steps_completed': not is_gui_mode  # True if we did manual steps above
+                'manual_steps_completed': True
             }
-            
-            # Step 4: Use ModlistMenuHandler to run the complete configuration
+
             from .menu_handler import ModlistMenuHandler
             from .config_handler import ConfigHandler
-            
+
             config_handler = ConfigHandler()
             modlist_menu = ModlistMenuHandler(config_handler)
-            
-            self.logger.info("Running post-installation configuration phase")
             configuration_success = modlist_menu.run_modlist_configuration_phase(config_context)
             
             if configuration_success:
@@ -524,4 +538,3 @@ class ModlistInstallCLIConfigurationMixin:
             else:
                 print(f"{COLOR_WARNING}Could not detect game type from ModOrganizer.ini for automated configuration.{COLOR_RESET}")
             print(f"{COLOR_INFO}You may need to manually configure the modlist for Steam/Proton.{COLOR_RESET}")
-

jackify/backend/handlers/modlist_install_cli_ttw.py

@@ -1,13 +1,59 @@
 """TTW integration methods for ModlistInstallCLI (Mixin)."""
 import logging
 import os
+import re
+import signal
+import shutil
 from pathlib import Path
 
-from .ui_colors import COLOR_PROMPT, COLOR_INFO, COLOR_ERROR, COLOR_RESET
+from .ui_colors import COLOR_PROMPT, COLOR_INFO, COLOR_ERROR, COLOR_RESET, COLOR_WARNING
 
 logger = logging.getLogger(__name__)
 
 
+def _strip_ansi_control_codes(text: str) -> str:
+    """Strip ANSI escape/control sequences from CLI output lines."""
+    return re.sub(r'\x1B(?:[@-Z\\-_]|\[[0-?]*[ -/]*[@-~])', '', text or '')
+
+
+def prompt_ttw_if_eligible(install_dir: str, modlist_name: str) -> None:
+    """Standalone TTW prompt usable outside the mixin context (e.g. CLI configure command).
+
+    Detects game type from ModOrganizer.ini, resolves the best available modlist name,
+    checks whitelist eligibility, and runs the interactive TTW prompt if applicable.
+    """
+    try:
+        # Detect game type from ModOrganizer.ini
+        mo2_ini = Path(install_dir) / "ModOrganizer.ini"
+        game_type = "skyrim"
+        if mo2_ini.exists():
+            content = mo2_ini.read_text(encoding="utf-8", errors="ignore").lower()
+            if "nvse_loader.exe" in content or "fallout new vegas" in content:
+                game_type = "falloutnv"
+            elif "fose_loader.exe" in content or "fallout 3" in content:
+                game_type = "fallout3"
+
+        if game_type not in ("falloutnv", "fallout_new_vegas"):
+            return
+
+        # Best available name: meta file, then selected_profile, then caller-supplied name
+        from jackify.backend.utils.modlist_meta import get_modlist_name
+        identified_name = get_modlist_name(install_dir) or modlist_name
+        if not identified_name:
+            return
+
+        class _Adapter(ModlistInstallCLITTWMixin):
+            def __init__(self):
+                self.logger = logging.getLogger(__name__)
+                self.verbose = False
+                self.filesystem_handler = None
+                self.config_handler = None
+
+        _Adapter()._check_and_prompt_ttw_integration(install_dir, game_type, identified_name)
+    except Exception as e:
+        logger.error("TTW post-configure check failed: %s", e, exc_info=True)
+
+
 class ModlistInstallCLITTWMixin:
     """Mixin providing TTW integration methods."""
 
@@ -26,7 +72,38 @@ class ModlistInstallCLITTWMixin:
             print(f"TTW combines Fallout 3 and New Vegas into a single game.")
             print(f"\nWould you like to install TTW now?")
 
-            user_input = input(f"{COLOR_PROMPT}Install TTW? (yes/no): {COLOR_RESET}").strip().lower()
+            # Some CLI entrypoint signal handlers currently call sys.exit(), which can interrupt
+            # this prompt unexpectedly. Temporarily convert SIGINT/SIGTERM to KeyboardInterrupt
+            # and keep prompting so users can answer explicitly.
+            original_sigint = signal.getsignal(signal.SIGINT)
+            original_sigterm = signal.getsignal(signal.SIGTERM)
+
+            def _prompt_signal_handler(signum, frame):
+                raise KeyboardInterrupt
+
+            try:
+                signal.signal(signal.SIGINT, _prompt_signal_handler)
+                signal.signal(signal.SIGTERM, _prompt_signal_handler)
+
+                while True:
+                    try:
+                        user_input = input(f"{COLOR_PROMPT}Install TTW now? (Y/n): {COLOR_RESET}").strip().lower()
+                    except KeyboardInterrupt:
+                        print(f"\n{COLOR_WARNING}TTW prompt interrupted. Please type yes or no.{COLOR_RESET}")
+                        continue
+                    except EOFError:
+                        print(f"\n{COLOR_WARNING}No input available. Skipping TTW installation.{COLOR_RESET}")
+                        return
+
+                    if user_input == "":
+                        user_input = "y"
+                    if user_input in ['yes', 'y', 'no', 'n']:
+                        break
+
+                    print(f"{COLOR_WARNING}Please answer yes or no.{COLOR_RESET}")
+            finally:
+                signal.signal(signal.SIGINT, original_sigint)
+                signal.signal(signal.SIGTERM, original_sigterm)
 
             if user_input in ['yes', 'y']:
                 self._launch_ttw_installation(modlist_name, install_dir)
@@ -106,15 +183,26 @@ class ModlistInstallCLITTWMixin:
 
             # Import TTW installation handler
             from jackify.backend.handlers.ttw_installer_handler import TTWInstallerHandler
-            from jackify.backend.models.configuration import SystemInfo
+            from jackify.backend.handlers.config_handler import ConfigHandler
+            from jackify.backend.handlers.filesystem_handler import FileSystemHandler
+            from jackify.backend.services.platform_detection_service import PlatformDetectionService
             from pathlib import Path
 
-            system_info = SystemInfo()
+            is_steamdeck = bool(getattr(self, 'steamdeck', False))
+            if not is_steamdeck:
+                try:
+                    is_steamdeck = PlatformDetectionService.get_instance().is_steamdeck
+                except Exception:
+                    is_steamdeck = False
+
+            filesystem_handler = getattr(self, 'filesystem_handler', None) or FileSystemHandler()
+            config_handler = getattr(self, 'config_handler', None) or ConfigHandler()
+
             ttw_installer_handler = TTWInstallerHandler(
-                steamdeck=system_info.is_steamdeck if hasattr(system_info, 'is_steamdeck') else False,
+                steamdeck=is_steamdeck,
                 verbose=self.verbose if hasattr(self, 'verbose') else False,
-                filesystem_handler=self.filesystem_handler if hasattr(self, 'filesystem_handler') else None,
-                config_handler=self.config_handler if hasattr(self, 'config_handler') else None
+                filesystem_handler=filesystem_handler,
+                config_handler=config_handler
             )
 
             # Check if TTW_Linux_Installer is installed
@@ -122,7 +210,9 @@ class ModlistInstallCLITTWMixin:
 
             if not ttw_installer_handler.ttw_installer_installed:
                 print(f"{COLOR_INFO}TTW_Linux_Installer is not installed.{COLOR_RESET}")
-                user_input = input(f"{COLOR_PROMPT}Install TTW_Linux_Installer? (yes/no): {COLOR_RESET}").strip().lower()
+                user_input = input(f"{COLOR_PROMPT}Install TTW_Linux_Installer? (Y/n): {COLOR_RESET}").strip().lower()
+                if user_input == "":
+                    user_input = "y"
 
                 if user_input not in ['yes', 'y']:
                     print(f"{COLOR_INFO}TTW installation cancelled.{COLOR_RESET}")
@@ -152,7 +242,7 @@ class ModlistInstallCLITTWMixin:
 
             # Prompt for TTW installation directory
             print(f"\n{COLOR_PROMPT}TTW Installation Directory{COLOR_RESET}")
-            default_ttw_dir = os.path.join(install_dir, 'TTW')
+            default_ttw_dir = os.path.join(install_dir, 'mods', '[NoDelete] Tale of Two Wastelands')
             print(f"Default: {default_ttw_dir}")
             ttw_install_dir = input(f"{COLOR_PROMPT}TTW install directory (Enter for default): {COLOR_RESET}").strip()
 
@@ -162,14 +252,105 @@ class ModlistInstallCLITTWMixin:
             # Run TTW installation
             print(f"\n{COLOR_INFO}Installing TTW using TTW_Linux_Installer...{COLOR_RESET}")
             print(f"{COLOR_INFO}This may take a while (15-30 minutes depending on your system).{COLOR_RESET}")
+            phase_state = {"current": "Processing", "last_rendered": ""}
+            progress_line_active = {"value": False}
 
-            success, message = ttw_installer_handler.install_ttw_backend(Path(mpi_path), Path(ttw_install_dir))
+            def _ttw_output_callback(line: str):
+                clean = _strip_ansi_control_codes(line or "").strip()
+                if not clean:
+                    return
+
+                lower = clean.lower()
+                rendered = ""
+
+                # Match GUI behavior: explicit Loading manifest counter line
+                manifest_match = re.search(r'loading manifest:\s*(\d+)/(\d+)', lower)
+                if manifest_match:
+                    current = int(manifest_match.group(1))
+                    total = int(manifest_match.group(2))
+                    phase_state["current"] = "Loading manifest"
+                    percent = int((current / total) * 100) if total > 0 else 0
+                    rendered = f"[TTW] {phase_state['current']}: {current:,}/{total:,} ({percent}%)"
+                else:
+                    # Match GUI behavior: generic [X/Y] counters with current phase name.
+                    progress_match = re.search(r'\[(\d+)/(\d+)\]', clean)
+                    if progress_match:
+                        current = int(progress_match.group(1))
+                        total = int(progress_match.group(2))
+                        percent = int((current / total) * 100) if total > 0 else 0
+                        rendered = f"[TTW] {phase_state['current']}: {current:,}/{total:,} ({percent}%)"
+                    else:
+                        # Update phase state from milestone-like lines, then echo milestones.
+                        if 'manifest' in lower:
+                            phase_state["current"] = "Loading manifest"
+                        elif any(token in lower for token in ('extract', 'decompress', 'installing', 'copying', 'merge')):
+                            phase_state["current"] = clean
+
+                        is_milestone = any(token in lower for token in ('===', 'complete', 'finished', 'starting', 'valid'))
+                        is_error = 'error:' in lower
+                        is_warning = 'warning:' in lower
+                        if is_milestone or is_error or is_warning:
+                            rendered = f"[TTW] {clean}"
+
+                if not rendered or rendered == phase_state["last_rendered"]:
+                    return
+                phase_state["last_rendered"] = rendered
+                if rendered.startswith("[TTW] Loading manifest:") or re.search(r'^\[TTW\] .+?: [\d,]+/[\d,]+ \(\d+%\)$', rendered):
+                    # In-place progress updates for counters/phases.
+                    print(f"\r{COLOR_INFO}{rendered}{COLOR_RESET}", end="", flush=True)
+                    progress_line_active["value"] = True
+                else:
+                    # Non-progress milestones/errors get normal line output.
+                    if progress_line_active["value"]:
+                        print()
+                        progress_line_active["value"] = False
+                    print(f"{COLOR_INFO}{rendered}{COLOR_RESET}")
+
+            success, message = ttw_installer_handler.install_ttw_backend_with_output_stream(
+                Path(mpi_path),
+                Path(ttw_install_dir),
+                output_callback=_ttw_output_callback,
+            )
+            if progress_line_active["value"]:
+                print()
 
             if success:
+                ttw_output_path = Path(ttw_install_dir)
+                ttw_version = ""
+                version_match = re.search(r'v?(\d+\.\d+(?:\.\d+)?)', Path(mpi_path).stem, re.IGNORECASE)
+                if version_match:
+                    ttw_version = version_match.group(1)
+
+                skip_copy = False
+                mods_dir = Path(install_dir) / "mods"
+                if ttw_output_path.parent == mods_dir:
+                    versioned_name = f"[NoDelete] Tale of Two Wastelands {ttw_version}".strip() if ttw_version else "[NoDelete] Tale of Two Wastelands"
+                    versioned_path = mods_dir / versioned_name
+                    if ttw_output_path != versioned_path and ttw_output_path.exists():
+                        if versioned_path.exists():
+                            shutil.rmtree(versioned_path)
+                        ttw_output_path.rename(versioned_path)
+                        ttw_output_path = versioned_path
+                    skip_copy = True
+
+                print(f"\n{COLOR_INFO}Integrating TTW into modlist load order...{COLOR_RESET}")
+                integration_success = TTWInstallerHandler.integrate_ttw_into_modlist(
+                    ttw_output_path=ttw_output_path,
+                    modlist_install_dir=Path(install_dir),
+                    ttw_version=ttw_version,
+                    skip_copy=skip_copy,
+                )
+
+                if not integration_success:
+                    print(f"{COLOR_ERROR}TTW installed, but integration into modlist failed.{COLOR_RESET}")
+                    print(f"{COLOR_ERROR}Please check TTW_Install_workflow.log for details.{COLOR_RESET}")
+                    return
+
                 print(f"\n{COLOR_INFO}═══════════════════════════════════════════════════════════════{COLOR_RESET}")
                 print(f"{COLOR_INFO}TTW Installation Complete!{COLOR_RESET}")
                 print(f"{COLOR_PROMPT}═══════════════════════════════════════════════════════════════{COLOR_RESET}")
-                print(f"\nTTW has been installed to: {ttw_install_dir}")
+                print(f"\nTTW has been installed to: {ttw_output_path}")
+                print(f"TTW has been integrated into '{modlist_name}' (modlist.txt + plugins.txt updated).")
                 print(f"The modlist '{modlist_name}' is now ready to use with TTW.")
             else:
                 print(f"\n{COLOR_ERROR}TTW installation failed. Check the logs for details.{COLOR_RESET}")
@@ -177,4 +358,4 @@ class ModlistInstallCLITTWMixin:
 
         except Exception as e:
             self.logger.error(f"Error during TTW installation: {e}", exc_info=True)
-            print(f"{COLOR_ERROR}Error during TTW installation: {e}{COLOR_RESET}")
+            print(f"{COLOR_ERROR}Error during TTW installation: {e}{COLOR_RESET}")

jackify/backend/handlers/modlist_wine_ops.py

@@ -207,8 +207,11 @@ class ModlistWineOpsMixin:
         # Add game-specific extras
         if "skyrim" in game or "fallout4" in game or "starfield" in game or "oblivion_remastered" in game or "enderal" in game:
             extras += ["d3dcompiler_47", "d3dx11_43", "d3dcompiler_43", "dotnet6", "dotnet7"]
-        elif "falloutnewvegas" in game or "fnv" in game or "oblivion" in game:
+        elif "falloutnewvegas" in game or "fnv" in game or "fallout3" in game or "fo3" in game or "oblivion" in game:
             extras += ["d3dx9_43", "d3dx9"]
+        else:
+            # Unknown game type — install the union of all known component sets
+            extras += ["d3dcompiler_47", "d3dx11_43", "d3dcompiler_43", "dotnet6", "dotnet7", "d3dx9_43", "d3dx9"]
         # Add modlist-specific extras
         modlist_lower = modlist_name.lower().replace(" ", "") if modlist_name else ""
         for key, components in self.MODLIST_WINE_COMPONENTS.items():

jackify/backend/handlers/oauth_token_handler.py

@@ -66,12 +66,12 @@ class OAuthTokenHandler:
                 # Linux machine-id
                 with open('/etc/machine-id', 'r') as f:
                     machine_id = f.read().strip()
-            except:
+            except (OSError, IOError):
                 try:
                     # Alternative locations
                     with open('/var/lib/dbus/machine-id', 'r') as f:
                         machine_id = f.read().strip()
-                except:
+                except (OSError, IOError):
                     pass
 
             # Combine multiple sources of machine-specific data
@@ -221,7 +221,7 @@ class OAuthTokenHandler:
                 # Clean up temp file on error
                 try:
                     os.unlink(temp_path)
-                except:
+                except (OSError, IOError):
                     pass
                 raise e
 

jackify/backend/handlers/progress_parser.py

@@ -87,10 +87,12 @@ class ProgressParser(ProgressParserPhaseMixin, ProgressParserFilesMixin, Progres
             re.IGNORECASE
         )
         
-        # Alternative format: "[timestamp] StatusText (current/total) - speed"
+        # Alternative format: "[timestamp] StatusText (current/total) - speed [- Xunit remaining]"
         # Example: "[00:00:10] Downloading Mod Archives (17/214) - 6.8MB/s"
+        # Example (engine 0.4.8+): "[00:00:10] Downloading Mod Archives (17/214) - 6.8MB/s - 23.1GB remaining"
+        # Timestamp prefix is now optional — engine no longer emits [HH:MM:SS].
         self.timestamp_status_pattern = re.compile(
-            r'\[[^\]]+\]\s+(.+?)\s+\((\d+)/(\d+)\)\s*-\s*([^\s]+)',
+            r'(?:\[[^\]]+\]\s+)?(.+?)\s+\((\d+)/(\d+)\)\s*-\s*([^\s]+)(?:\s*-\s*([\d.]+)\s*(B|KB|MB|GB|TB)\s+remaining)?',
             re.IGNORECASE
         )
         
@@ -230,18 +232,33 @@ class ProgressParser(ProgressParserPhaseMixin, ProgressParserFilesMixin, Progres
             if speed_info:
                 operation = self._detect_operation_from_line(status_text)
                 result.speed_info = (operation.value, speed_info)
-            
+
+            # Extract remaining size if present (engine 0.4.8+: "- 23.1GB remaining")
+            remaining_val = timestamp_match.group(5)
+            remaining_unit = timestamp_match.group(6)
+            if remaining_val and remaining_unit:
+                remaining_bytes = self._convert_to_bytes(float(remaining_val), remaining_unit)
+                if remaining_bytes > 0 and max_steps > 0 and current_step < max_steps:
+                    fraction_done = current_step / max_steps
+                    # Estimate total from remaining and fraction; clamp denominator to avoid div/0 near completion
+                    estimated_total = remaining_bytes / max(1.0 - fraction_done, 0.01)
+                    data_processed = int(estimated_total - remaining_bytes)
+                    result.data_info = (max(0, data_processed), int(estimated_total))
+                elif remaining_bytes > 0:
+                    result.data_info = (0, int(remaining_bytes))
+
             # Calculate overall percentage from step progress
             if max_steps > 0:
                 result.overall_percent = (current_step / max_steps) * 100.0
-            
+
             result.has_progress = True
         
         # Try .wabbajack download format: "[timestamp] Downloading .wabbajack (size/size) - speed"
         # Example: "[00:02:08] Downloading .wabbajack (739.2/1947.2MB) - 6.0MB/s"
         # Also handles: "[00:02:08] Downloading modlist.wabbajack (739.2/1947.2MB) - 6.0MB/s"
+        # Timestamp prefix is optional in newer engine output.
         wabbajack_download_pattern = re.compile(
-            r'\[[^\]]+\]\s+Downloading\s+([^\s]+\.wabbajack|\.wabbajack)\s+\(([^)]+)\)\s*-\s*([^\s]+)',
+            r'(?:\[[^\]]+\]\s+)?Downloading\s+([^\s]+\.wabbajack|\.wabbajack)\s+\(([^)]+)\)\s*-\s*([^\s]+)',
             re.IGNORECASE
         )
         wabbajack_match = wabbajack_download_pattern.search(line)
@@ -294,13 +311,15 @@ class ProgressParser(ProgressParserPhaseMixin, ProgressParserFilesMixin, Progres
             
             # Set phase
             result.phase = InstallationPhase.DOWNLOAD
-            result.phase_name = f"Downloading {filename}"
+            phase_target = filename
+            if phase_target.lower().startswith("downloading "):
+                phase_target = phase_target[len("downloading "):].strip()
+            result.phase_name = f"Downloading {phase_target}"
             
             # Create FileProgress entry for .wabbajack file
             if data_info:
                 current_bytes, total_bytes = data_info
                 percent = (current_bytes / total_bytes) * 100.0 if total_bytes > 0 else 0.0
-                from jackify.shared.progress_models import FileProgress, OperationType
                 file_progress = FileProgress(
                     filename=filename,
                     operation=OperationType.DOWNLOAD,
@@ -313,6 +332,50 @@ class ProgressParser(ProgressParserPhaseMixin, ProgressParserFilesMixin, Progres
             
             result.has_progress = True
         
+        # Try to extract install progress format:
+        # "Installing files X/Y (GB/GB) - Converting textures: N/M"
+        install_match = re.match(
+            r'Installing files\s+(\d+)/(\d+)\s+\(([^)]+)\)(?:\s*-\s*Converting textures:\s*(\d+)/(\d+))?',
+            line.strip(), re.IGNORECASE)
+        if install_match:
+            result.phase = InstallationPhase.INSTALL
+            result.step_info = (int(install_match.group(1)), int(install_match.group(2)))
+            data_info = self._parse_data_string(install_match.group(3))
+            if data_info:
+                result.data_info = data_info
+                current_bytes, total_bytes = data_info
+                if total_bytes > 0:
+                    result.overall_percent = (current_bytes / total_bytes) * 100.0
+            if install_match.group(4) and install_match.group(5):
+                fp = FileProgress(
+                    filename='_tex',
+                    operation=OperationType.INSTALL,
+                    percent=0.0,
+                    speed=-1.0
+                )
+                fp._texture_counter = (int(install_match.group(4)), int(install_match.group(5)))
+                fp._hidden = True
+                result.file_progress = fp
+            result.has_progress = True
+
+        # Conversion-only status line (without "Installing files ...")
+        conversion_match = re.search(r'Converting textures:\s*(\d+)/(\d+)', line, re.IGNORECASE)
+        if conversion_match and not install_match:
+            if not result.phase:
+                result.phase = InstallationPhase.INSTALL
+            if not result.phase_name:
+                result.phase_name = "Converting textures"
+            fp = FileProgress(
+                filename='_tex',
+                operation=OperationType.INSTALL,
+                percent=0.0,
+                speed=-1.0
+            )
+            fp._texture_counter = (int(conversion_match.group(1)), int(conversion_match.group(2)))
+            fp._hidden = True
+            result.file_progress = fp
+            result.has_progress = True
+
         # Try to extract step information (fallback)
         if not result.step_info:
             step_info = self._extract_step_info(line)

jackify/backend/handlers/progress_parser_extraction.py

@@ -24,6 +24,12 @@ class ProgressParserExtractionMixin:
 
     def _extract_step_info(self, line: str) -> Optional[Tuple[int, int]]:
         """Extract step information like [12/14]."""
+        line_lower = line.lower()
+        # Texture conversion counters are tracked separately; don't let generic
+        # step parsing overwrite the primary install counter.
+        if 'converting textures' in line_lower and 'installing files' not in line_lower:
+            return None
+
         match = self.wabbajack_status_pattern.search(line)
         if match:
             current = int(match.group(1))

jackify/backend/handlers/progress_parser_phase.py

@@ -20,8 +20,13 @@ class ProgressParserPhaseMixin:
             phase = self._map_section_to_phase(section_name)
             return (phase, section_match.group(1).strip())
 
+        # [FILE_PROGRESS] lines drive file activity only — skip phase extraction for them
+        if '[FILE_PROGRESS]' in line:
+            return None
+
+        # Make the [timestamp] prefix optional — engine no longer emits it.
         action_match = re.search(
-            r'\[.*?\]\s*(Installing|Downloading|Extracting|Validating|Processing|Checking existing)',
+            r'(?:\[.*?\]\s*)?(Installing|Downloading|Extracting|Validating|Processing|Checking existing)',
             line,
             re.IGNORECASE
         )
@@ -51,13 +56,18 @@ class ProgressParserPhaseMixin:
             return InstallationPhase.DOWNLOAD
         elif 'extract' in section_lower:
             return InstallationPhase.EXTRACT
-        elif 'validate' in section_lower or 'verif' in section_lower:
+        elif 'hash' in section_lower or 'validate' in section_lower or 'verif' in section_lower:
             return InstallationPhase.VALIDATE
         elif 'install' in section_lower:
             return InstallationPhase.INSTALL
+        elif 'bsa' in section_lower or 'building' in section_lower:
+            return InstallationPhase.INSTALL
         elif 'finaliz' in section_lower or 'complet' in section_lower:
             return InstallationPhase.FINALIZE
-        elif 'configur' in section_lower or 'initializ' in section_lower:
+        elif ('configur' in section_lower or 'initializ' in section_lower
+              or 'looking' in section_lower or 'cleaning' in section_lower
+              or 'unmodified' in section_lower or 'updating' in section_lower
+              or 'folder' in section_lower or 'delete' in section_lower):
             return InstallationPhase.INITIALIZATION
         else:
             return InstallationPhase.UNKNOWN

jackify/backend/handlers/progress_state_processing.py

@@ -94,9 +94,6 @@ class ProgressStateProcessingMixin:
             updated = True
 
         if parsed.file_progress:
-            if hasattr(parsed.file_progress, '_hidden') and parsed.file_progress._hidden:
-                return updated
-
             if hasattr(parsed.file_progress, '_texture_counter'):
                 tex_current, tex_total = parsed.file_progress._texture_counter
                 self.state.texture_conversion_current = tex_current
@@ -109,6 +106,9 @@ class ProgressStateProcessingMixin:
                 self.state.bsa_building_total = bsa_total
                 updated = True
 
+            if hasattr(parsed.file_progress, '_hidden') and parsed.file_progress._hidden:
+                return updated
+
             if parsed.file_progress.filename.lower().endswith('.wabbajack'):
                 self._wabbajack_entry_name = parsed.file_progress.filename
                 self._remove_synthetic_wabbajack()

jackify/backend/handlers/shortcut_launch_options.py

@@ -153,7 +153,7 @@ class ShortcutLaunchOptionsMixin:
         content = (
             "[handlers]\n"
             "size=1\n"
-            "1\\games=\"skyrimse,skyrim\"\n"
+            "1\\games=\"skyrimse,skyrim,fallout4,falloutnv,fallout3,oblivion,enderal,starfield\"\n"
             f"1\\executable={win_path}\n"
             "1\\arguments=\n"
         )

jackify/backend/handlers/subprocess_utils.py

@@ -145,7 +145,7 @@ def increase_file_descriptor_limit(target_limit=1048576):
         # Get current limit for reporting
         try:
             soft_limit, _ = resource.getrlimit(resource.RLIMIT_NOFILE)
-        except:
+        except (OSError, ValueError):
             soft_limit = "unknown"
         
         return False, soft_limit, soft_limit, f"Failed to increase file descriptor limit: {e}"
@@ -154,7 +154,7 @@ class ProcessManager:
     """
     Shared process manager for robust subprocess launching, tracking, and cancellation.
     """
-    def __init__(self, cmd, env=None, cwd=None, text=False, bufsize=0):
+    def __init__(self, cmd, env=None, cwd=None, text=False, bufsize=0, separate_stderr=False):
         self.cmd = cmd
         # Default to cleaned environment if None to prevent AppImage variable inheritance
         if env is None:
@@ -164,15 +164,17 @@ class ProcessManager:
         self.cwd = cwd
         self.text = text
         self.bufsize = bufsize
+        self.separate_stderr = separate_stderr
         self.proc = None
         self.process_group_pid = None
         self._start_process()
 
     def _start_process(self):
+        stderr_arg = subprocess.PIPE if self.separate_stderr else subprocess.STDOUT
         self.proc = subprocess.Popen(
             self.cmd,
             stdout=subprocess.PIPE,
-            stderr=subprocess.STDOUT,
+            stderr=stderr_arg,
             env=self.env,
             cwd=self.cwd,
             text=self.text,
@@ -186,38 +188,48 @@ class ProcessManager:
         Attempt to robustly terminate the process and its children.
         """
         cleanup_attempts = 0
-        if self.proc:
-            try:
-                self.proc.terminate()
+        try:
+            if self.proc:
                 try:
-                    self.proc.wait(timeout=timeout_terminate)
-                    return
-                except subprocess.TimeoutExpired:
-                    pass
-            except Exception:
-                pass
-            try:
-                self.proc.kill()
-                try:
-                    self.proc.wait(timeout=timeout_kill)
-                    return
-                except subprocess.TimeoutExpired:
-                    pass
-            except Exception:
-                pass
-            # Kill process group if possible
-            if self.process_group_pid:
-                try:
-                    os.killpg(self.process_group_pid, signal.SIGKILL)
+                    self.proc.terminate()
+                    try:
+                        self.proc.wait(timeout=timeout_terminate)
+                        return
+                    except subprocess.TimeoutExpired:
+                        pass
                 except Exception:
                     pass
-            # Last resort: pkill by command name
-            while cleanup_attempts < max_cleanup_attempts:
                 try:
-                    subprocess.run(['pkill', '-f', os.path.basename(self.cmd[0])], timeout=5, capture_output=True)
+                    self.proc.kill()
+                    try:
+                        self.proc.wait(timeout=timeout_kill)
+                        return
+                    except subprocess.TimeoutExpired:
+                        pass
                 except Exception:
                     pass
-                cleanup_attempts += 1
+                # Kill entire process group (catches 7zz and other child processes)
+                if self.process_group_pid:
+                    try:
+                        os.killpg(self.process_group_pid, signal.SIGKILL)
+                    except Exception:
+                        pass
+                # Last resort: pkill by command name
+                while cleanup_attempts < max_cleanup_attempts:
+                    try:
+                        subprocess.run(['pkill', '-f', os.path.basename(self.cmd[0])], timeout=5, capture_output=True)
+                    except Exception:
+                        pass
+                    cleanup_attempts += 1
+        finally:
+            # Always close pipes — unblocks threads blocked on read(1) or iterating stderr
+            if self.proc:
+                for pipe in (self.proc.stdout, self.proc.stderr):
+                    if pipe:
+                        try:
+                            pipe.close()
+                        except Exception:
+                            pass
 
     def is_running(self):
         return self.proc and self.proc.poll() is None
@@ -234,5 +246,8 @@ class ProcessManager:
 
     def read_stdout_char(self):
         if self.proc and self.proc.stdout:
-            return self.proc.stdout.read(1)
-        return None 
+            try:
+                return self.proc.stdout.read(1)
+            except (ValueError, OSError):
+                return None
+        return None

jackify/backend/handlers/ttw_installer_backend.py

@@ -229,7 +229,7 @@ class TTWInstallerBackendMixin:
             return False, f"Error executing TTW_Linux_Installer: {e}"
 
     @staticmethod
-    def integrate_ttw_into_modlist(ttw_output_path: Path, modlist_install_dir: Path, ttw_version: str) -> bool:
+    def integrate_ttw_into_modlist(ttw_output_path: Path, modlist_install_dir: Path, ttw_version: str, skip_copy: bool = False) -> bool:
         """Integrate TTW output into a modlist's MO2 structure."""
         import shutil
         logging_handler = LoggingHandler()
@@ -246,12 +246,16 @@ class TTWInstallerBackendMixin:
                 return False
             mod_folder_name = f"[NoDelete] Tale of Two Wastelands {ttw_version}" if ttw_version else "[NoDelete] Tale of Two Wastelands"
             target_mod_dir = mods_dir / mod_folder_name
-            logger.info("Copying TTW output to %s", target_mod_dir)
-            if target_mod_dir.exists():
-                logger.info("Removing existing TTW mod at %s", target_mod_dir)
-                shutil.rmtree(target_mod_dir)
-            shutil.copytree(ttw_output_path, target_mod_dir)
-            logger.info("TTW output copied successfully")
+            if skip_copy:
+                # TTW was installed directly to target_mod_dir — no copy needed
+                logger.info("TTW already at target location, skipping copy: %s", target_mod_dir)
+            else:
+                logger.info("Copying TTW output to %s", target_mod_dir)
+                if target_mod_dir.exists():
+                    logger.info("Removing existing TTW mod at %s", target_mod_dir)
+                    shutil.rmtree(target_mod_dir)
+                shutil.copytree(ttw_output_path, target_mod_dir)
+                logger.info("TTW output copied successfully")
             ttw_esms = [
                 "Fallout3.esm", "Anchorage.esm", "ThePitt.esm", "BrokenSteel.esm",
                 "PointLookout.esm", "Zeta.esm", "TaleOfTwoWastelands.esm", "YUPTTW.esm"

jackify/backend/handlers/wabbajack_parser.py

@@ -36,7 +36,7 @@ class WabbajackParser:
         
         # List of supported games in Jackify
         self.supported_games = [
-            'skyrim', 'fallout4', 'falloutnv', 'oblivion', 
+            'skyrim', 'fallout4', 'falloutnv', 'fallout3', 'oblivion',
             'starfield', 'oblivion_remastered', 'enderal'
         ]
     

jackify/backend/handlers/wine_utils_proton.py

@@ -218,7 +218,9 @@ class WineUtilsProtonMixin:
             Path.home() / ".steam/root/compatibilitytools.d",
             Path.home() / ".var/app/com.valvesoftware.Steam/.local/share/Steam/compatibilitytools.d",
             Path.home() / ".var/app/com.valvesoftware.Steam.CompatibilityTool.Proton-GE/.local/share/Steam/compatibilitytools.d",
-            Path.home() / ".var/app/com.valvesoftware.Steam/.local/share/Steam/compatibilitytools.d/GE-Proton"
+            Path.home() / ".var/app/com.valvesoftware.Steam/.local/share/Steam/compatibilitytools.d/GE-Proton",
+            Path("/usr/share/steam/compatibilitytools.d"),
+            Path("/usr/lib/steam/compatibilitytools.d"),
         ]
         return [path for path in compat_paths if path.exists()]
 
@@ -357,7 +359,7 @@ class WineUtilsProtonMixin:
                     if version_match:
                         major_ver = int(version_match.group(1))
                         minor_ver = int(version_match.group(2))
-                        priority = 200 + (major_ver * 10) + minor_ver
+                        priority = 200 + (major_ver * 10) + minor_ver  # kept for backward compat; sort uses tuple key
                         compat_name = WineUtilsProtonMixin._parse_compat_tool_name(proton_dir) or dir_name
                         found_versions.append({
                             'name': dir_name,
@@ -374,7 +376,7 @@ class WineUtilsProtonMixin:
                         logger.debug(f"Skipping {dir_name} - unknown GE-Proton version format")
             except Exception as e:
                 logger.warning(f"Error scanning {compat_path}: {e}")
-        found_versions.sort(key=lambda x: x['priority'], reverse=True)
+        found_versions.sort(key=lambda x: (x['major_version'], x['minor_version']), reverse=True)
         logger.info(f"Found {len(found_versions)} GE-Proton version(s)")
         return found_versions
 
@@ -427,7 +429,16 @@ class WineUtilsProtonMixin:
         all_versions.extend(WineUtilsProtonMixin.scan_ge_proton_versions())
         all_versions.extend(WineUtilsProtonMixin.scan_thirdparty_proton_versions())
         all_versions.extend(WineUtilsProtonMixin.scan_valve_proton_versions())
-        all_versions.sort(key=lambda x: x['priority'], reverse=True)
+        _TYPE_RANK = {'GE-Proton': 2, 'ThirdParty-Proton': 1, 'Valve-Proton': 0}
+        all_versions.sort(
+            key=lambda x: (
+                _TYPE_RANK.get(x.get('type', ''), 0),
+                x.get('major_version', 0),
+                x.get('minor_version', 0),
+                x.get('priority', 0),
+            ),
+            reverse=True,
+        )
         unique_versions = []
         seen_names = set()
         for version in all_versions:
@@ -443,17 +454,16 @@ class WineUtilsProtonMixin:
 
     @staticmethod
     def select_best_proton() -> Optional[Dict[str, Any]]:
-        """Select the best available Proton (GE or Valve). Excludes third-party builds."""
+        """Select the best available Proton version. Prefers GE-Proton, then Valve, then any third-party build."""
         available_versions = WineUtilsProtonMixin.scan_all_proton_versions()
         if not available_versions:
-            logger.warning("No compatible Proton versions found")
+            logger.warning("No Proton versions found")
             return None
-        compatible_versions = [v for v in available_versions if v.get('type') in ('GE-Proton', 'Valve-Proton')]
-        if not compatible_versions:
-            logger.warning("No compatible Proton versions found (only third-party builds available)")
-            return None
-        best_version = compatible_versions[0]
-        logger.info(f"Selected best Proton version: {best_version['name']} ({best_version['type']})")
+        best_version = available_versions[0]
+        if best_version.get('type') == 'ThirdParty-Proton':
+            logger.debug(f"No GE/Valve Proton found; using third-party build: {best_version['name']}")
+        else:
+            logger.info(f"Selected Proton: {best_version['name']} ({best_version['type']})")
         return best_version
 
     @staticmethod

jackify/backend/handlers/winetricks_env.py

@@ -83,7 +83,7 @@ class WinetricksEnvMixin:
                     self.logger.warning(f"User-selected Proton no longer exists: {user_proton_path}")
 
             if not wine_binary:
-                if user_proton_path == 'auto':
+                if not user_proton_path or user_proton_path == 'auto':
                     self.logger.info("Auto-detecting Proton (user selected 'auto')")
                     best_proton = WineUtils.select_best_proton()
                     if best_proton:

jackify/backend/services/automated_prefix_creation.py

@@ -8,250 +8,9 @@ import subprocess
 
 logger = logging.getLogger(__name__)
 
-
-def debug_print(message):
-    """Log debug message only if debug mode is enabled"""
-    from jackify.backend.handlers.config_handler import ConfigHandler
-    config_handler = ConfigHandler()
-    if config_handler.get('debug_mode', False):
-        logger.debug(message)
-
-
 class PrefixCreationMixin:
     """Mixin providing prefix creation methods for AutomatedPrefixService."""
 
-    def detect_actual_prefix_appid(self, initial_appid: int, shortcut_name: str) -> Optional[int]:
-        """
-        After Steam restart, detect the actual prefix AppID that was created.
-        Uses direct VDF file reading to find the actual AppID.
-
-        Args:
-            initial_appid: The initial (negative) AppID from shortcuts.vdf
-            shortcut_name: Name of the shortcut for logging
-
-        Returns:
-            The actual (positive) AppID of the created prefix, or None if not found
-        """
-        try:
-            logger.info(f"Using VDF to detect actual AppID for shortcut: {shortcut_name}")
-
-            # Wait up to 30 seconds for Steam to process the shortcut
-            for i in range(30):
-                try:
-                    from ..handlers.shortcut_handler import ShortcutHandler
-                    from ..handlers.path_handler import PathHandler
-
-                    path_handler = PathHandler()
-                    shortcuts_path = path_handler._find_shortcuts_vdf()
-
-                    if shortcuts_path:
-                        from ..handlers.vdf_handler import VDFHandler
-                        shortcuts_data = VDFHandler.load(shortcuts_path, binary=True)
-
-                        if shortcuts_data and 'shortcuts' in shortcuts_data:
-                            for idx, shortcut in shortcuts_data['shortcuts'].items():
-                                app_name = shortcut.get('AppName', shortcut.get('appname', '')).strip()
-
-                                if app_name.lower() == shortcut_name.lower():
-                                    appid = shortcut.get('appid')
-                                    if appid:
-                                        actual_appid = int(appid) & 0xFFFFFFFF
-                                        logger.info(f"Found shortcut '{app_name}' in shortcuts.vdf")
-                                        logger.info(f"  Initial AppID (signed): {initial_appid}")
-                                        logger.info(f"  Actual AppID (unsigned): {actual_appid}")
-                                        return actual_appid
-
-                    logger.debug(f"Shortcut '{shortcut_name}' not found in VDF yet (attempt {i+1}/30)")
-                    time.sleep(1)
-
-                except Exception as e:
-                    logger.warning(f"Error reading shortcuts.vdf on attempt {i+1}: {e}")
-                    time.sleep(1)
-
-            logger.error(f"Shortcut '{shortcut_name}' not found in shortcuts.vdf after 30 seconds")
-            return None
-
-        except Exception as e:
-            logger.error(f"Error detecting actual prefix AppID: {e}")
-            return None
-
-    def launch_shortcut_to_trigger_prefix(self, initial_appid: int) -> bool:
-        """
-        Launch the shortcut using rungameid to trigger prefix creation.
-        This follows the same pattern as the working test script.
-        
-        Args:
-            initial_appid: The initial (negative) AppID from shortcuts.vdf
-            
-        Returns:
-            True if successful, False otherwise
-        """
-        try:
-            # Convert signed AppID to unsigned AppID (same as STL's generateSteamShortID)
-            unsigned_appid = self.generate_steam_short_id(initial_appid)
-            
-            # Calculate rungameid using the unsigned AppID
-            rungameid = (unsigned_appid << 32) | 0x02000000
-            
-            logger.info(f"Launching shortcut with rungameid: {rungameid}")
-            debug_print(f"[DEBUG] Launching shortcut with rungameid: {rungameid}")
-            debug_print(f"[DEBUG] Initial signed AppID: {initial_appid}")
-            debug_print(f"[DEBUG] Unsigned AppID: {unsigned_appid}")
-            
-            # Launch using rungameid
-            cmd = ['steam', f'steam://rungameid/{rungameid}']
-            debug_print(f"[DEBUG] About to run launch command: {' '.join(cmd)}")
-            
-            # Use subprocess.Popen to launch asynchronously (steam command returns immediately)
-            process = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True)
-            
-            # Wait a moment for the process to start
-            time.sleep(1)
-            
-            # Check if the process is still running (steam command should exit quickly)
-            try:
-                return_code = process.poll()
-                if return_code is None:
-                    # Process is still running, wait a bit more
-                    time.sleep(2)
-                    return_code = process.poll()
-                
-                debug_print(f"[DEBUG] Steam launch process return code: {return_code}")
-                
-                # Get any output
-                stdout, stderr = process.communicate(timeout=1)
-                if stdout:
-                    debug_print(f"[DEBUG] Steam launch stdout: {stdout}")
-                if stderr:
-                    debug_print(f"[DEBUG] Steam launch stderr: {stderr}")
-                    
-            except subprocess.TimeoutExpired:
-                debug_print("[DEBUG] Steam launch process timed out, but that's OK")
-                process.kill()
-            
-            logger.info(f"Launch command executed: {' '.join(cmd)}")
-            
-            # Give it a moment for the shortcut to actually start
-            time.sleep(5)
-            
-            return True
-            
-        except subprocess.TimeoutExpired:
-            logger.error("Launch command timed out")
-            debug_print("[DEBUG] Launch command timed out")
-            return False
-        except Exception as e:
-            logger.error(f"Error launching shortcut: {e}")
-            debug_print(f"[DEBUG] Error launching shortcut: {e}")
-            return False
-
-    def create_prefix_directly(self, appid: int, batch_file_path: str) -> Optional[Path]:
-        """
-        Create prefix directly using Proton wrapper.
-        
-        Args:
-            appid: The AppID from the shortcut
-            batch_file_path: Path to the temporary batch file
-            
-        Returns:
-            Path to the created prefix, or None if failed
-        """
-        proton_path = self.find_proton_experimental()
-        if not proton_path:
-            return None
-        
-        # Steam uses negative AppIDs for non-Steam shortcuts, but we need the positive value for the prefix path
-        positive_appid = abs(appid)
-        logger.info(f"Using positive AppID {positive_appid} for prefix creation (original: {appid})")
-        
-        # Create the prefix directory structure
-        prefix_path = self._get_compatdata_path_for_appid(positive_appid)
-        if not prefix_path:
-            logger.error(f"Could not determine compatdata path for AppID {positive_appid}")
-            return None
-        
-        # Create the prefix directory structure
-        prefix_path.mkdir(parents=True, exist_ok=True)
-        pfx_dir = prefix_path / "pfx"
-        pfx_dir.mkdir(exist_ok=True)
-        
-        # Set up environment
-        env = os.environ.copy()
-        env['STEAM_COMPAT_DATA_PATH'] = str(prefix_path)
-        env['STEAM_COMPAT_APP_ID'] = str(positive_appid)  # Use positive AppID for environment
-        
-        # Determine correct Steam root based on installation type
-        from ..handlers.path_handler import PathHandler
-        path_handler = PathHandler()
-        steam_library = path_handler.find_steam_library()
-        if steam_library and steam_library.name == "common":
-            # Extract Steam root from library path: .../Steam/steamapps/common -> .../Steam
-            steam_root = steam_library.parent.parent
-            env['STEAM_COMPAT_CLIENT_INSTALL_PATH'] = str(steam_root)
-        else:
-            # Fallback to legacy path if detection fails
-            env['STEAM_COMPAT_CLIENT_INSTALL_PATH'] = str(Path.home() / ".local/share/Steam")
-        
-        # Build the command
-        cmd = [
-            str(proton_path / "proton"),
-            "run",
-            batch_file_path
-        ]
-        
-        logger.info(f"Creating prefix with command: {' '.join(cmd)}")
-        logger.info(f"Prefix path: {prefix_path}")
-        logger.info(f"Using AppID: {positive_appid} (original: {appid})")
-        
-        try:
-            # Run the command with a timeout
-            result = subprocess.run(
-                cmd, 
-                env=env, 
-                capture_output=True, 
-                text=True, 
-                timeout=30
-            )
-            
-            # Check if prefix was created
-            time.sleep(2)  # Give it a moment to settle
-            
-            prefix_created = prefix_path.exists()
-            pfx_exists = (prefix_path / "pfx").exists()
-            
-            logger.info(f"Return code: {result.returncode}")
-            logger.info(f"Prefix created: {prefix_created}")
-            logger.info(f"pfx directory exists: {pfx_exists}")
-            
-            if result.stderr:
-                logger.debug(f"stderr: {result.stderr.strip()}")
-            
-            success = prefix_created and pfx_exists
-            
-            if success:
-                logger.info(f"Prefix created successfully at: {prefix_path}")
-                return prefix_path
-            else:
-                logger.error("Failed to create prefix")
-                return None
-                
-        except subprocess.TimeoutExpired:
-            logger.warning("Command timed out, but this might be normal")
-            # Check if prefix was created despite timeout
-            prefix_created = prefix_path.exists()
-            pfx_exists = (prefix_path / "pfx").exists()
-            
-            if prefix_created and pfx_exists:
-                logger.info(f"Prefix created successfully despite timeout at: {prefix_path}")
-                return prefix_path
-            else:
-                logger.error("No prefix created")
-                return None
-                
-        except Exception as e:
-            logger.error(f"Error creating prefix: {e}")
-            return None
-
     def _get_compatdata_path_for_appid(self, appid: int) -> Optional[Path]:
         """
         Get the compatdata path for a given AppID.

jackify/backend/services/automated_prefix_game_utils.py

@@ -151,6 +151,7 @@ class GameUtilsMixin:
         game_dir_names = {
             "skyrim": "Skyrim Special Edition",
             "fnv": "FalloutNV",
+            "fo3": "Fallout3",
             "fo4": "Fallout4",
             "oblivion": "Oblivion",
             "oblivion_remastered": "Oblivion Remastered",

jackify/backend/services/automated_prefix_proton.py

@@ -7,15 +7,6 @@ import vdf
 
 logger = logging.getLogger(__name__)
 
-
-def debug_print(message):
-    """Log debug message only if debug mode is enabled"""
-    from jackify.backend.handlers.config_handler import ConfigHandler
-    config_handler = ConfigHandler()
-    if config_handler.get('debug_mode', False):
-        logger.debug(message)
-
-
 class ProtonOperationsMixin:
     """Mixin providing Proton and compatibility tool methods for AutomatedPrefixService."""
 
@@ -112,7 +103,7 @@ class ProtonOperationsMixin:
         # STL sets the compatibility tool in config.vdf, not shortcuts.vdf
         # We know this works from manual testing, so just log that we're skipping this check
         logger.info(f"Skipping Proton version check for '{shortcut_name}' - STL handles this correctly")
-        debug_print(f"[DEBUG] Skipping Proton version check for '{shortcut_name}' - STL handles this correctly")
+        logger.debug(f"[DEBUG] Skipping Proton version check for '{shortcut_name}' - STL handles this correctly")
 
     def set_proton_version_for_shortcut(self, appid: int, proton_version: str) -> bool:
         """
@@ -165,7 +156,7 @@ class ProtonOperationsMixin:
             os.fsync(f.fileno()) if hasattr(f, 'fileno') else None
 
             logger.info(f"Set Proton version {proton_version} for AppID {appid}")
-            debug_print(f"[DEBUG] Set Proton version {proton_version} for AppID {appid} in config.vdf")
+            logger.debug(f"[DEBUG] Set Proton version {proton_version} for AppID {appid} in config.vdf")
 
             # Small delay to ensure filesystem write completes
             import time
@@ -175,7 +166,7 @@ class ProtonOperationsMixin:
             with open(config_path, 'r') as f:
                 verify_data = vdf.load(f)
             compat_mapping = verify_data.get('Software', {}).get('Valve', {}).get('Steam', {}).get('CompatToolMapping', {}).get(str(appid))
-            debug_print(f"[DEBUG] Verification: AppID {appid} -> {compat_mapping}")
+            logger.debug(f"[DEBUG] Verification: AppID {appid} -> {compat_mapping}")
             
             return True
             
@@ -324,14 +315,14 @@ class ProtonOperationsMixin:
             config_data['Software']['Valve']['Steam']['CompatToolMapping'][str(unsigned_appid)] = compat_entry
             
             logger.info(f"Added compatibility tool entry: {str(unsigned_appid)} -> {compat_tool}")
-            debug_print(f"[DEBUG] Added compatibility tool entry: {str(unsigned_appid)} -> {compat_tool}")
+            logger.debug(f"[DEBUG] Added compatibility tool entry: {str(unsigned_appid)} -> {compat_tool}")
             
             # Write back to file (text format)
             with open(config_path, 'w') as f:
                 vdf.dump(config_data, f)
             
             logger.info(f"Set compatibility tool STL-style: AppID {unsigned_appid} -> {compat_tool}")
-            debug_print(f"[DEBUG] Set compatibility tool STL-style: AppID {unsigned_appid} -> {compat_tool}")
+            logger.debug(f"[DEBUG] Set compatibility tool STL-style: AppID {unsigned_appid} -> {compat_tool}")
             
             return True
             
@@ -564,7 +555,7 @@ class ProtonOperationsMixin:
                 f.writelines(lines)
             
             logger.info(f"Updated localconfig.vdf: Signed AppID {signed_appid_int} -> OverlayAppEnable=1, DisableLaunchInVR=1")
-            debug_print(f"[DEBUG] Updated localconfig.vdf: Signed AppID {signed_appid_int} -> OverlayAppEnable=1, DisableLaunchInVR=1")
+            logger.debug(f"[DEBUG] Updated localconfig.vdf: Signed AppID {signed_appid_int} -> OverlayAppEnable=1, DisableLaunchInVR=1")
             
             return True
             

jackify/backend/services/automated_prefix_registry.py

@@ -72,7 +72,12 @@ class RegistryOperationsMixin:
             return False
 
     def _apply_universal_dotnet_fixes(self, modlist_compatdata_path: str):
-        """Apply universal dotnet4.x compatibility registry fixes to ALL modlists"""
+        """Apply universal dotnet4.x compatibility registry fixes to ALL modlists.
+
+        Direct file editing is preferred over `wine reg add` — faster, no Wine
+        process overhead, and works even when Proton isn't on PATH.  Falls back
+        to subprocess wine reg add when the reg files haven't been created yet.
+        """
         try:
             prefix_path = os.path.join(modlist_compatdata_path, "pfx")
             if not os.path.exists(prefix_path):
@@ -81,59 +86,99 @@ class RegistryOperationsMixin:
 
             logger.info("Applying universal dotnet4.x compatibility registry fixes...")
 
-            # Find the appropriate Wine binary to use for registry operations
+            user_reg = os.path.join(prefix_path, "user.reg")
+            system_reg = os.path.join(prefix_path, "system.reg")
+
+            fix1 = fix2 = False
+
+            if os.path.exists(user_reg):
+                fix1 = self._reg_set_value(
+                    user_reg,
+                    "[Software\\\\Wine\\\\DllOverrides]",
+                    '"*mscoree"',
+                    '"native"',
+                )
+            if os.path.exists(system_reg):
+                fix2 = self._reg_set_value(
+                    system_reg,
+                    "[Software\\\\Microsoft\\\\.NETFramework]",
+                    '"OnlyUseLatestCLR"',
+                    "dword:00000001",
+                )
+
+            if fix1 and fix2:
+                logger.info("Universal dotnet4.x compatibility fixes applied via direct reg file editing")
+                return True
+
+            # Fall back to wine reg add when reg files are not present yet
+            logger.debug("Reg files not ready; falling back to wine reg add")
             wine_binary = self._find_wine_binary_for_registry(modlist_compatdata_path)
             if not wine_binary:
-                logger.error("Could not find Wine binary for registry operations")
+                logger.error("Could not find Wine binary for registry fallback")
                 return False
 
-            # Set environment for Wine registry operations
             env = os.environ.copy()
             env['WINEPREFIX'] = prefix_path
-            env['WINEDEBUG'] = '-all'  # Suppress Wine debug output
+            env['WINEDEBUG'] = '-all'
 
-            # Registry fix 1: Set *mscoree=native DLL override (asterisk for full override)
-            # Use native .NET runtime instead of Wine's
-            logger.debug("Setting *mscoree=native DLL override...")
-            cmd1 = [
-                wine_binary, 'reg', 'add',
-                'HKEY_CURRENT_USER\\Software\\Wine\\DllOverrides',
-                '/v', '*mscoree', '/t', 'REG_SZ', '/d', 'native', '/f'
-            ]
+            r1 = subprocess.run(
+                [wine_binary, 'reg', 'add',
+                 'HKEY_CURRENT_USER\\Software\\Wine\\DllOverrides',
+                 '/v', '*mscoree', '/t', 'REG_SZ', '/d', 'native', '/f'],
+                env=env, capture_output=True, text=True, errors='replace',
+            )
+            r2 = subprocess.run(
+                [wine_binary, 'reg', 'add',
+                 'HKEY_LOCAL_MACHINE\\Software\\Microsoft\\.NETFramework',
+                 '/v', 'OnlyUseLatestCLR', '/t', 'REG_DWORD', '/d', '1', '/f'],
+                env=env, capture_output=True, text=True, errors='replace',
+            )
 
-            result1 = subprocess.run(cmd1, env=env, capture_output=True, text=True, errors='replace')
-            if result1.returncode == 0:
-                logger.info("Successfully applied *mscoree=native DLL override")
+            ok = r1.returncode == 0 and r2.returncode == 0
+            if ok:
+                logger.info("Universal dotnet4.x fixes applied via wine reg add fallback")
             else:
-                logger.warning(f"Failed to set *mscoree DLL override: {result1.stderr}")
-
-            # Registry fix 2: Set OnlyUseLatestCLR=1
-            # Use latest CLR to avoid .NET version conflicts
-            logger.debug("Setting OnlyUseLatestCLR=1 registry entry...")
-            cmd2 = [
-                wine_binary, 'reg', 'add',
-                'HKEY_LOCAL_MACHINE\\Software\\Microsoft\\.NETFramework',
-                '/v', 'OnlyUseLatestCLR', '/t', 'REG_DWORD', '/d', '1', '/f'
-            ]
-
-            result2 = subprocess.run(cmd2, env=env, capture_output=True, text=True, errors='replace')
-            if result2.returncode == 0:
-                logger.info("Successfully applied OnlyUseLatestCLR=1 registry entry")
-            else:
-                logger.warning(f"Failed to set OnlyUseLatestCLR: {result2.stderr}")
-
-            # Both fixes applied - this should eliminate dotnet4.x installation requirements
-            if result1.returncode == 0 and result2.returncode == 0:
-                logger.info("Universal dotnet4.x compatibility fixes applied successfully")
-                return True
-            else:
-                logger.warning("Some dotnet4.x registry fixes failed, but continuing...")
-                return False
+                logger.warning("Some dotnet4.x registry fixes failed")
+            return ok
 
         except Exception as e:
             logger.error(f"Failed to apply universal dotnet4.x fixes: {e}")
             return False
 
+    def _reg_set_value(self, reg_path: str, section: str, key: str, value: str) -> bool:
+        """Set or add a key=value pair in a Wine .reg text file."""
+        try:
+            with open(reg_path, 'r', encoding='utf-8', errors='ignore') as f:
+                lines = f.readlines()
+
+            in_section = False
+            updated = False
+            for i, line in enumerate(lines):
+                stripped = line.strip()
+                if stripped.lower() == section.lower():
+                    in_section = True
+                elif stripped.startswith('[') and in_section:
+                    # Reached next section without finding key; insert before it
+                    lines.insert(i, f'{key}={value}\n')
+                    updated = True
+                    break
+                elif in_section and stripped.startswith(key.lower()) or (in_section and stripped.lower().startswith(key.lower())):
+                    lines[i] = f'{key}={value}\n'
+                    updated = True
+                    break
+
+            if not updated:
+                if not in_section:
+                    lines.append(f'\n{section}\n')
+                lines.append(f'{key}={value}\n')
+
+            with open(reg_path, 'w', encoding='utf-8') as f:
+                f.writelines(lines)
+            return True
+        except Exception as e:
+            logger.debug(f"_reg_set_value failed for {reg_path}: {e}")
+            return False
+
     def _find_wine_binary_for_registry(self, modlist_compatdata_path: str) -> Optional[str]:
         """Find the appropriate Wine binary for registry operations"""
         try:
@@ -227,8 +272,41 @@ class RegistryOperationsMixin:
             logger.debug(f"Error during recursive wine search in {proton_path}: {e}")
             return None
 
+    def _create_canonical_game_symlink(self, pfx_path: Path, real_game_path: str) -> bool:
+        """Symlink the real game dir into the prefix at the canonical Windows Steam path.
+
+        The Bethesda launcher validates that Installed Path looks like a proper
+        Windows Steam path (C:\\Program Files...).  A raw Z:\\ or D:\\ path passes
+        the existence check on the user's own machine but fails for other users
+        whose Wine path translation differs.  By symlinking the real directory into
+        drive_c/Program Files (x86)/Steam/steamapps/common/, we write a canonical
+        C:\\ path to the registry that satisfies the launcher, while NVSE follows
+        the symlink to reach the actual executable.
+        """
+        try:
+            real_path = Path(real_game_path)
+            game_dir_name = real_path.name
+
+            symlink_parent = pfx_path / "drive_c" / "Program Files (x86)" / "Steam" / "steamapps" / "common"
+            symlink_parent.mkdir(parents=True, exist_ok=True)
+
+            symlink_path = symlink_parent / game_dir_name
+
+            if symlink_path.is_symlink():
+                symlink_path.unlink()
+            elif symlink_path.exists():
+                logger.warning(f"Real directory already exists at symlink target {symlink_path}, skipping")
+                return False
+
+            symlink_path.symlink_to(real_path)
+            logger.info(f"Created game symlink: {symlink_path} -> {real_path}")
+            return True
+        except Exception as e:
+            logger.warning(f"Failed to create canonical game symlink: {e}")
+            return False
+
     def _inject_game_registry_entries(self, modlist_compatdata_path: str, special_game_type: str):
-        """Detect and inject FNV/Enderal game paths and apply universal dotnet4.x compatibility fixes"""
+        """Detect and inject FNV/FO3/Enderal game paths into the modlist prefix registry."""
         system_reg_path = os.path.join(modlist_compatdata_path, "pfx", "system.reg")
         if not os.path.exists(system_reg_path):
             logger.warning("system.reg not found, skipping game path injection")
@@ -236,41 +314,74 @@ class RegistryOperationsMixin:
 
         logger.info("Detecting game registry entries...")
 
-        # Universal dotnet4.x registry fixes applied in modlist_handler.py after .reg downloads
-        
-        # Game configurations
         games_config = {
             "22380": {  # Fallout New Vegas AppID
                 "name": "Fallout New Vegas",
                 "common_names": ["Fallout New Vegas", "FalloutNV"],
                 "registry_section": "[Software\\\\Wow6432Node\\\\bethesda softworks\\\\falloutnv]",
-                "path_key": "Installed Path"
+                "path_key": "Installed Path",
+            },
+            "22300": {  # Fallout 3 AppID
+                "name": "Fallout 3",
+                "common_names": ["Fallout 3", "Fallout3", "Fallout 3 GOTY"],
+                "registry_section": "[Software\\\\Wow6432Node\\\\bethesda softworks\\\\fallout3]",
+                "path_key": "Installed Path",
+            },
+            "22370": {  # Fallout 3 GOTY AppID alias
+                "name": "Fallout 3",
+                "common_names": ["Fallout 3 GOTY", "Fallout 3"],
+                "registry_section": "[Software\\\\Wow6432Node\\\\bethesda softworks\\\\fallout3]",
+                "path_key": "Installed Path",
             },
             "976620": {  # Enderal Special Edition AppID
                 "name": "Enderal",
                 "common_names": ["Enderal: Forgotten Stories (Special Edition)", "Enderal Special Edition", "Enderal"],
-                "registry_section": "[Software\\\\Wow6432Node\\\\SureAI\\\\Enderal SE]", 
-                "path_key": "installed path"
-            }
+                "registry_section": "[Software\\\\Wow6432Node\\\\SureAI\\\\Enderal SE]",
+                "path_key": "installed path",
+            },
         }
-        
-        # Detect and inject each game
+
+        pfx_path = Path(modlist_compatdata_path) / "pfx"
+
         for app_id, config in games_config.items():
             game_path = self._find_steam_game(app_id, config["common_names"])
-            if game_path:
-                logger.info(f"Detected {config['name']} at: {game_path}")
+            if not game_path:
+                logger.debug(f"{config['name']} not found in Steam libraries")
+                continue
+
+            logger.info(f"Detected {config['name']} at: {game_path}")
+
+            # Create a symlink inside the prefix at the canonical Windows Steam path so the
+            # Bethesda launcher sees a proper C:\ path while NVSE can still resolve the exe.
+            symlink_ok = self._create_canonical_game_symlink(pfx_path, game_path)
+
+            if symlink_ok:
+                game_dir_name = Path(game_path).name
+                canonical_win_path = f"C:\\Program Files (x86)\\Steam\\steamapps\\common\\{game_dir_name}"
+                wine_val = canonical_win_path.replace("\\", "\\\\") + "\\\\"
+                success = self._reg_set_value(
+                    system_reg_path,
+                    config["registry_section"],
+                    f'"{config["path_key"]}"',
+                    f'"{wine_val}"',
+                )
+                if success:
+                    logger.info(f"Registry set to canonical path for {config['name']}: {canonical_win_path}")
+                else:
+                    logger.warning(f"Failed to set canonical registry path for {config['name']}")
+            else:
+                # Symlink failed — fall back to writing the real Z:/D: path
+                logger.warning(f"Symlink failed for {config['name']}, writing real path to registry")
                 success = self._update_registry_path(
                     system_reg_path,
-                    config["registry_section"], 
+                    config["registry_section"],
                     config["path_key"],
                     game_path
                 )
                 if success:
-                    logger.info(f"Updated registry entry for {config['name']}")
+                    logger.info(f"Updated registry entry for {config['name']} (real path fallback)")
                 else:
                     logger.warning(f"Failed to update registry entry for {config['name']}")
-            else:
-                logger.debug(f"{config['name']} not found in Steam libraries")
-                
+
         logger.info("Game registry injection completed")
 

jackify/backend/services/automated_prefix_service.py

@@ -16,13 +16,6 @@ import vdf
 
 logger = logging.getLogger(__name__)
 
-def debug_print(message):
-    """Log debug message only if debug mode is enabled"""
-    from jackify.backend.handlers.config_handler import ConfigHandler
-    config_handler = ConfigHandler()
-    if config_handler.get('debug_mode', False):
-        logger.debug(message)
-
 from .automated_prefix_shortcuts import ShortcutOperationsMixin
 from .automated_prefix_proton import ProtonOperationsMixin
 from .automated_prefix_creation import PrefixCreationMixin
@@ -170,7 +163,6 @@ exit"""
             logger.error(f"Error getting config path: {e}")
             return None
 
-
     def kill_running_processes(self) -> bool:
         """
         Kill any running processes that might interfere with prefix creation.

jackify/backend/services/automated_prefix_shortcuts.py

@@ -11,15 +11,6 @@ from .automated_prefix_shortcuts_cleanup import AutomatedPrefixShortcutsCleanupM
 
 logger = logging.getLogger(__name__)
 
-
-def debug_print(message):
-    """Log debug message only if debug mode is enabled"""
-    from jackify.backend.handlers.config_handler import ConfigHandler
-    config_handler = ConfigHandler()
-    if config_handler.get('debug_mode', False):
-        logger.debug(message)
-
-
 class ShortcutOperationsMixin(AutomatedPrefixShortcutsCleanupMixin):
     """Mixin providing shortcut operation methods for AutomatedPrefixService."""
 
@@ -148,10 +139,10 @@ class ShortcutOperationsMixin(AutomatedPrefixShortcutsCleanupMixin):
             True if successful, False otherwise
         """
         try:
-            debug_print(f"[DEBUG] create_shortcut_directly called for '{shortcut_name}' - this is the fallback method")
+            logger.debug(f"[DEBUG] create_shortcut_directly called for '{shortcut_name}' - this is the fallback method")
             shortcuts_path = self._get_shortcuts_path()
             if not shortcuts_path:
-                debug_print("[DEBUG] No shortcuts path found")
+                logger.debug("[DEBUG] No shortcuts path found")
                 return False
             
             # Read current shortcuts
@@ -207,191 +198,6 @@ class ShortcutOperationsMixin(AutomatedPrefixShortcutsCleanupMixin):
             logger.error(f"Error creating shortcut directly: {e}")
             return False
 
-    def create_shortcut_directly_with_proton(self, shortcut_name: str, exe_path: str, modlist_install_dir: str) -> bool:
-        """
-        Create a Steam shortcut with temporary batch file for invisible prefix creation.
-        This uses the CRC32-based AppID calculation for predictable results.
-        
-        Args:
-            shortcut_name: Name for the shortcut
-            exe_path: Path to the final ModOrganizer.exe executable
-            modlist_install_dir: Directory where the modlist is installed
-            
-        Returns:
-            True if successful, False otherwise
-        """
-        try:
-            debug_print(f"[DEBUG] create_shortcut_directly_with_proton called for '{shortcut_name}' - using temporary batch file approach")
-            shortcuts_path = self._get_shortcuts_path()
-            if not shortcuts_path:
-                debug_print("[DEBUG] No shortcuts path found")
-                return False
-            
-            # Calculate predictable AppID using CRC32 (based on FINAL exe_path)
-            from zlib import crc32
-            combined_string = exe_path + shortcut_name
-            crc = crc32(combined_string.encode('utf-8'))
-            appid = -(crc & 0x7FFFFFFF)  # Make it negative and within 32-bit range (like other shortcuts)
-            
-            debug_print(f"[DEBUG] Calculated AppID: {appid} from '{combined_string}'")
-            
-            # Create temporary batch file for invisible prefix creation
-            batch_content = """@echo off
-echo Creating Proton prefix...
-timeout /t 3 /nobreak >nul
-echo Prefix creation complete.
-"""
-            from jackify.shared.paths import get_jackify_data_dir
-            batch_path = get_jackify_data_dir() / "temp_prefix_creation.bat"
-            batch_path.parent.mkdir(parents=True, exist_ok=True)
-            
-            with open(batch_path, 'w') as f:
-                f.write(batch_content)
-            
-            debug_print(f"[DEBUG] Created temporary batch file: {batch_path}")
-            
-            # Read current shortcuts
-            with open(shortcuts_path, 'rb') as f:
-                shortcuts_data = vdf.binary_load(f)
-            
-            shortcuts = shortcuts_data.get('shortcuts', {})
-            
-            # Check if shortcut already exists (idempotent)
-            found = False
-            new_shortcuts_list = []
-            shortcuts_list = list(shortcuts.values())
-            
-            for shortcut in shortcuts_list:
-                if shortcut.get('AppName') == shortcut_name:
-                    debug_print(f"[DEBUG] Updating existing shortcut for '{shortcut_name}'")
-                    # Update existing shortcut with temporary batch file
-                    shortcut.update({
-                        'Exe': f'"{batch_path}"',  # Point to temporary batch file
-                        'StartDir': f'"{batch_path.parent}"',  # Batch file directory
-                        'appid': appid,
-                        'LaunchOptions': '',  # Empty like working shortcuts
-                        'tags': {},  # Empty tags like working shortcuts
-                        'CompatTool': 'proton_experimental'  # Set Proton version directly in shortcut
-                    })
-                    new_shortcuts_list.append(shortcut)
-                    found = True
-                else:
-                    new_shortcuts_list.append(shortcut)
-            
-            if not found:
-                debug_print(f"[DEBUG] Creating new shortcut for '{shortcut_name}'")
-                # Create new shortcut entry pointing to temporary batch file
-                new_shortcut = {
-                    'AppName': shortcut_name,
-                    'Exe': f'"{batch_path}"',  # Point to temporary batch file
-                    'StartDir': f'"{batch_path.parent}"',  # Batch file directory
-                    'appid': appid,
-                    'icon': '',
-                    'ShortcutPath': '',
-                    'LaunchOptions': '',  # Empty like working shortcuts
-                    'IsHidden': 0,
-                    'AllowDesktopConfig': 1,
-                    'AllowOverlay': 1,
-                    'OpenVR': 0,
-                    'Devkit': 0,
-                    'DevkitGameID': '',
-                    'LastPlayTime': 0,
-                    'FlatpakAppID': '',
-                    'tags': {},  # Empty tags like working shortcuts
-                    'sortas': '',
-                    'CompatTool': 'proton_experimental'  # Set Proton version directly in shortcut
-                }
-                new_shortcuts_list.append(new_shortcut)
-            
-            # Rebuild shortcuts dict with new order
-            shortcuts_data['shortcuts'] = {str(i): s for i, s in enumerate(new_shortcuts_list)}
-            
-            # Write back to file
-            with open(shortcuts_path, 'wb') as f:
-                vdf.binary_dump(shortcuts_data, f)
-            
-            logger.info(f"Created/updated shortcut with temporary batch file: {shortcut_name} with AppID {appid}")
-            debug_print(f"[DEBUG] Shortcut created/updated with temporary batch file, AppID {appid}")
-            
-            # Set Proton version in config.vdf BEFORE creating shortcut
-            if self.set_proton_version_for_shortcut(appid, 'proton_experimental'):
-                logger.info(f"Set Proton Experimental for shortcut {shortcut_name}")
-                return True
-            else:
-                logger.warning(f"Failed to set Proton version for shortcut {shortcut_name}")
-                return False
-            
-        except Exception as e:
-            logger.error(f"Error creating shortcut with temporary batch file: {e}")
-            return False
-
-    def replace_shortcut_with_final_exe(self, shortcut_name: str, final_exe_path: str, modlist_install_dir: str) -> bool:
-        """
-        Replace the temporary batch file shortcut with the final ModOrganizer.exe.
-        This should be called after the prefix has been created.
-        
-        Args:
-            shortcut_name: Name of the shortcut to update
-            final_exe_path: Path to the final ModOrganizer.exe executable
-            modlist_install_dir: Directory where the modlist is installed
-            
-        Returns:
-            True if successful, False otherwise
-        """
-        try:
-            debug_print(f"[DEBUG] replace_shortcut_with_final_exe called for '{shortcut_name}'")
-            shortcuts_path = self._get_shortcuts_path()
-            if not shortcuts_path:
-                debug_print("[DEBUG] No shortcuts path found")
-                return False
-            
-            # Read current shortcuts
-            with open(shortcuts_path, 'rb') as f:
-                shortcuts_data = vdf.binary_load(f)
-            
-            shortcuts = shortcuts_data.get('shortcuts', {})
-            
-            # Find and update the shortcut
-            found = False
-            new_shortcuts_list = []
-            shortcuts_list = list(shortcuts.values())
-            
-            for shortcut in shortcuts_list:
-                if shortcut.get('AppName') == shortcut_name:
-                    debug_print(f"[DEBUG] Replacing temporary batch file with final exe for '{shortcut_name}'")
-                    # Update shortcut to point to final ModOrganizer.exe
-                    shortcut.update({
-                        'Exe': f'"{final_exe_path}"',  # Point to final ModOrganizer.exe
-                        'StartDir': modlist_install_dir,  # ModOrganizer directory
-                        'LaunchOptions': '',  # Empty like working shortcuts
-                        'tags': {},  # Empty tags like working shortcuts
-                        # Keep existing appid and CompatibilityTool
-                    })
-                    new_shortcuts_list.append(shortcut)
-                    found = True
-                else:
-                    new_shortcuts_list.append(shortcut)
-            
-            if not found:
-                logger.error(f"Shortcut '{shortcut_name}' not found for replacement")
-                return False
-            
-            # Rebuild shortcuts dict with new order
-            shortcuts_data['shortcuts'] = {str(i): s for i, s in enumerate(new_shortcuts_list)}
-            
-            # Write back to file
-            with open(shortcuts_path, 'wb') as f:
-                vdf.binary_dump(shortcuts_data, f)
-            
-            logger.info(f"Replaced shortcut with final exe: {shortcut_name}")
-            debug_print(f"[DEBUG] Shortcut replaced with final ModOrganizer.exe")
-            
-            return True
-            
-        except Exception as e:
-            logger.error(f"Error replacing shortcut with final exe: {e}")
-            return False
-
     def modify_shortcut_to_final_exe(self, shortcut_name: str, final_exe_path: str, 
                                    final_start_dir: str) -> bool:
         """

jackify/backend/services/automated_prefix_workflow.py

@@ -3,21 +3,10 @@ from pathlib import Path
 from typing import Optional, Union, List, Dict, Tuple
 import logging
 import os
-import time
-import subprocess
 import vdf
 
 logger = logging.getLogger(__name__)
 
-
-def debug_print(message):
-    """Log debug message only if debug mode is enabled"""
-    from jackify.backend.handlers.config_handler import ConfigHandler
-    config_handler = ConfigHandler()
-    if config_handler.get('debug_mode', False):
-        logger.debug(message)
-
-
 class WorkflowMixin:
     """Mixin providing workflow methods for AutomatedPrefixService."""
 
@@ -110,166 +99,6 @@ class WorkflowMixin:
         
         return message
 
-    def run_complete_workflow(self, shortcut_name: str, modlist_install_dir: str, 
-                            final_exe_path: str, progress_callback=None) -> Tuple[bool, Optional[Path], Optional[int]]:
-        """
-        Run the simple automated prefix creation workflow.
-        
-        Args:
-            shortcut_name: Name for the Steam shortcut
-            modlist_install_dir: Directory where the modlist is installed
-            final_exe_path: Path to ModOrganizer.exe
-            
-        Returns:
-            Tuple of (success, prefix_path, appid)
-        """
-        debug_print(f"[DEBUG] run_complete_workflow called with shortcut_name={shortcut_name}, modlist_install_dir={modlist_install_dir}, final_exe_path={final_exe_path}")
-        logger.info("Starting simple automated prefix creation workflow")
-        
-        # Initialize shared timing to continue from jackify-engine
-        from jackify.shared.timing import initialize_from_console_output
-        # TODO: Pass console output if available to continue timeline
-        initialize_from_console_output()
-        
-        # Show immediate feedback to user
-        if progress_callback:
-            progress_callback("Starting automated Steam setup...")
-        
-        try:
-            # Step 1: Create shortcut directly (NO STL needed!)
-            logger.info("Step 1: Creating shortcut directly to ModOrganizer.exe")
-            if progress_callback:
-                progress_callback("Creating Steam shortcut...")
-            if not self.create_shortcut_directly_with_proton(shortcut_name, final_exe_path, modlist_install_dir):
-                logger.error("Failed to create shortcut directly")
-                return False, None, None, None
-            if progress_callback:
-                progress_callback(f"{self._get_progress_timestamp()} Steam shortcut created successfully")
-            logger.info("Step 1 completed: Shortcut created directly")
-            
-            # Step 2: Calculate the predictable AppID and rungameid
-            logger.info("Step 2: Calculating predictable AppID")
-            if progress_callback:
-                progress_callback("Calculating AppID...")
-            
-            # Calculate AppID using the same method as create_shortcut_directly_with_proton
-            from zlib import crc32
-            combined_string = final_exe_path + shortcut_name
-            crc = crc32(combined_string.encode('utf-8'))
-            initial_appid = -(crc & 0x7FFFFFFF)  # Make it negative and within 32-bit range
-            
-            # Calculate rungameid for launching
-            rungameid = (initial_appid << 32) | 0x02000000
-            
-            # Convert AppID to positive prefix ID
-            expected_prefix_id = str(abs(initial_appid))
-            
-            if progress_callback:
-                progress_callback("AppID calculated")
-            logger.info(f"Step 2 completed: AppID = {initial_appid}, rungameid = {rungameid}, expected_prefix_id = {expected_prefix_id}")
-            
-            # Step 3: Restart Steam
-            logger.info("Step 3: Restarting Steam")
-            if progress_callback:
-                progress_callback(f"{self._get_progress_timestamp()} Restarting Steam...")
-            if not self.restart_steam():
-                logger.error("Failed to restart Steam")
-                return False, None, None, None
-            if progress_callback:
-                progress_callback(f"{self._get_progress_timestamp()} Steam restarted successfully")
-            logger.info("Step 3 completed: Steam restarted")
-            
-            # Step 4: Launch temporary batch file to create prefix invisibly
-            logger.info("Step 4: Launching temporary batch file to create prefix")
-            debug_print(f"[DEBUG] About to launch temporary batch file with rungameid={rungameid}")
-            
-            # Launch using rungameid (this will run the batch file invisibly)
-            try:
-                result = subprocess.run(['steam', f'steam://rungameid/{rungameid}'], 
-                                      capture_output=True, text=True, timeout=5)
-                debug_print(f"[DEBUG] Launch result: return_code={result.returncode}")
-                if result.returncode != 0:
-                    logger.error(f"Failed to launch temporary batch file: {result.stderr}")
-                    return False, None, None, None
-            except subprocess.TimeoutExpired:
-                debug_print("[DEBUG] Launch timed out (expected)")
-            except Exception as e:
-                logger.error(f"Error launching temporary batch file: {e}")
-                return False, None, None, None
-            if progress_callback:
-                progress_callback(f"{self._get_progress_timestamp()} Temporary batch file launched")
-            logger.info("Step 4 completed: Temporary batch file launched")
-            
-            # Step 5: Wait for temporary batch file to complete (invisible)
-            logger.info("Step 5: Waiting for temporary batch file to complete")
-            if progress_callback:
-                progress_callback(f"{self._get_progress_timestamp()} Creating Proton prefix (please wait)...")
-            
-            # Wait for batch file to complete (3 seconds + buffer)
-            time.sleep(5)
-            logger.info("Step 5 completed: Temporary batch file completed")
-            
-            # Step 6: Verify prefix was created
-            logger.info("Step 6: Verifying prefix creation")
-            if progress_callback:
-                progress_callback(f"{self._get_progress_timestamp()} Verifying prefix creation...")
-            
-            compatdata_path = Path.home() / ".local/share/Steam/steamapps/compatdata" / expected_prefix_id
-            if not compatdata_path.exists():
-                logger.error(f"Prefix not found at {compatdata_path}")
-                return False, None, None, None
-            
-            logger.info(f"Step 6 completed: Prefix verified at {compatdata_path}")
-            
-            # Step 7: Replace temporary batch file with final ModOrganizer.exe
-            logger.info("Step 7: Replacing temporary batch file with final ModOrganizer.exe")
-            if progress_callback:
-                progress_callback(f"{self._get_progress_timestamp()} Updating shortcut...")
-            
-            if not self.replace_shortcut_with_final_exe(shortcut_name, final_exe_path, modlist_install_dir):
-                logger.error("Failed to replace shortcut with final exe")
-                return False, None, None, None
-            
-            logger.info("Step 7 completed: Shortcut updated with final ModOrganizer.exe")
-            
-            # Step 8: Detect actual AppID using protontricks -l
-            logger.info("Step 8: Detecting actual AppID")
-            if progress_callback:
-                progress_callback(f"{self._get_progress_timestamp()} Detecting actual AppID...")
-            actual_appid = self.detect_actual_prefix_appid(initial_appid, shortcut_name)
-            if actual_appid is None:
-                logger.error("Failed to detect actual AppID")
-                return False, None, None, None
-            logger.info(f"Step 8 completed: Actual AppID = {actual_appid}")
-            
-            # Step 9: Verify prefix was created successfully
-            logger.info("Step 9: Verifying prefix creation")
-            if progress_callback:
-                progress_callback(f"{self._get_progress_timestamp()} Verifying prefix creation...")
-            prefix_path = self._get_compatdata_path_for_appid(actual_appid)
-            if not prefix_path or not prefix_path.exists():
-                logger.error(f"Prefix path not found: {prefix_path}")
-                return False, None, None, None
-            
-            if not self.verify_prefix_creation(prefix_path):
-                logger.error("Prefix verification failed")
-                return False, None, None, None
-            logger.info(f"Step 9 completed: Prefix verified at {prefix_path}")
-            
-            if progress_callback:
-                progress_callback(f"{self._get_progress_timestamp()} Steam Configuration complete!")
-            # Show Proton override notification if applicable
-            self._show_proton_override_notification(progress_callback)
-
-            logger.info(" Simple automated prefix creation workflow completed successfully")
-            return True, prefix_path, actual_appid
-            
-        except Exception as e:
-            logger.error(f"Error in automated prefix creation workflow: {e}")
-            import traceback
-            logger.error(f"Full traceback: {traceback.format_exc()}")
-            return False, None, None, None
-
     def run_working_workflow(self, shortcut_name: str, modlist_install_dir: str,
                             final_exe_path: str, progress_callback=None, steamdeck: Optional[bool] = None,
                             download_dir=None, auto_restart: bool = True) -> Tuple[bool, Optional[Path], Optional[int], Optional[str]]:
@@ -323,9 +152,9 @@ class WorkflowMixin:
         modlist_handler = ModlistHandler()
         special_game_type = modlist_handler.detect_special_game_type(modlist_install_dir)
 
-        # No launch options needed - both FNV and Enderal use registry injection
+        # No launch options needed - FNV, FO3 and Enderal use registry injection
         custom_launch_options = None
-        if special_game_type in ["fnv", "enderal"]:
+        if special_game_type in ["fnv", "fo3", "enderal"]:
             logger.info(f"Using registry injection approach for {special_game_type.upper()} modlist")
         else:
             logger.debug("Standard modlist - no special game handling needed")
@@ -372,7 +201,8 @@ class WorkflowMixin:
             )
             if not success:
                 logger.error("Failed to create shortcut with native Steam service")
-                return False, None, None, None
+                from jackify.shared.errors import shortcut_write_failed
+                raise shortcut_write_failed("create_shortcut_with_native_service returned failure")
             
             logger.info(f"Step 1 completed: Shortcut created with native service, AppID: {appid}")
             if progress_callback:
@@ -398,7 +228,8 @@ class WorkflowMixin:
                 logger.info("Step 2: restart_steam() returned %s", restart_ok)
                 if not restart_ok:
                     logger.error("Failed to start Steam")
-                    return False, None, None, None
+                    from jackify.shared.errors import steam_restart_failed
+                    raise steam_restart_failed("Steam did not come back within the expected time")
 
                 logger.info("Step 2 completed: Steam started")
                 if progress_callback:
@@ -415,7 +246,8 @@ class WorkflowMixin:
             
             if not self.create_prefix_with_proton_wrapper(appid):
                 logger.error("Failed to create Proton prefix")
-                return False, None, None, None
+                from jackify.shared.errors import prefix_creation_failed
+                raise prefix_creation_failed("create_prefix_with_proton_wrapper returned failure")
             
             logger.info("Step 3 completed: Proton prefix created")
             if progress_callback:
@@ -437,7 +269,7 @@ class WorkflowMixin:
             # Get prefix path (needed for logging regardless of game type)
             prefix_path = self.get_prefix_path(appid)
 
-            if special_game_type in ["fnv", "enderal"]:
+            if special_game_type in ["fnv", "fo3", "enderal"]:
                 logger.info(f"Step 5: Injecting {special_game_type.upper()} game registry entries")
                 if progress_callback:
                     progress_callback(f"{self._get_progress_timestamp()} Injecting {special_game_type.upper()} game registry entries...")
@@ -448,8 +280,6 @@ class WorkflowMixin:
                     logger.warning("Could not find prefix path for registry injection")
             else:
                 logger.info("Step 5: Skipping registry injection for standard modlist")
-                if progress_callback:
-                    progress_callback(f"{self._get_progress_timestamp()} No special game registry injection needed")
 
             # Step 5.5: Pre-create game-specific directories for all modlists
             logger.info(f"Step 5.5: Creating game-specific user directories")
@@ -477,10 +307,13 @@ class WorkflowMixin:
             return True, prefix_path, appid, last_timestamp
             
         except Exception as e:
-            logger.error(f"Error in working workflow: {e}")
+            logger.error(f"Error in working workflow: {e}", exc_info=True)
             if progress_callback:
                 progress_callback(f"Error: {str(e)}")
-            return False, None, None, None
+            from jackify.shared.errors import JackifyError, prefix_creation_failed
+            if isinstance(e, JackifyError):
+                raise
+            raise prefix_creation_failed(str(e)) from e
 
     def continue_workflow_after_conflict_resolution(self, shortcut_name: str, modlist_install_dir: str, 
                                                   final_exe_path: str, appid: int, progress_callback=None) -> Tuple[bool, Optional[Path], Optional[int]]:
@@ -520,7 +353,8 @@ class WorkflowMixin:
             
             if not self.create_prefix_with_proton_wrapper(appid):
                 logger.error("Failed to create Proton prefix")
-                return False, None, None, None
+                from jackify.shared.errors import prefix_creation_failed
+                raise prefix_creation_failed("create_prefix_with_proton_wrapper returned failure")
             
             logger.info("Step 3 completed: Proton prefix created")
             if progress_callback:

jackify/backend/services/mo2_setup_service.py

@@ -0,0 +1,166 @@
+"""
+MO2 Setup Service
+
+Downloads and configures a standalone Mod Organizer 2 instance:
+  - Fetches latest release from GitHub
+  - Extracts with 7z
+  - Creates a Steam shortcut and Proton prefix via AutomatedPrefixService
+"""
+
+import re
+import shutil
+import logging
+import subprocess
+from pathlib import Path
+from typing import Callable, Optional, Tuple
+
+import requests
+
+logger = logging.getLogger(__name__)
+
+
+def _is_dangerous_path(path: Path) -> bool:
+    home = Path.home().resolve()
+    dangerous = [Path('/'), Path('/home'), Path('/root'), home]
+    return any(path.resolve() == d for d in dangerous)
+
+
+class MO2SetupService:
+    """Download, extract, and configure a standalone MO2 instance."""
+
+    GITHUB_API = "https://api.github.com/repos/ModOrganizer2/modorganizer/releases/latest"
+    ASSET_PATTERN = re.compile(r"Mod\.Organizer-\d+\.\d+(\.\d+)?\.7z$")
+
+    def setup_mo2(
+        self,
+        install_dir: Path,
+        shortcut_name: str = "Mod Organizer 2",
+        progress_callback: Optional[Callable[[str], None]] = None,
+        should_cancel: Optional[Callable[[], bool]] = None,
+    ) -> Tuple[bool, Optional[int], Optional[str]]:
+        """
+        Download, extract, and configure MO2.
+
+        Returns (success, app_id, error_message).
+        """
+
+        def _progress(msg: str):
+            logger.info(msg)
+            if progress_callback:
+                progress_callback(msg)
+        
+        def _cancel_requested() -> bool:
+            try:
+                return bool(should_cancel and should_cancel())
+            except Exception:
+                return False
+
+        if not shutil.which('7z'):
+            return False, None, "7z not found. Install p7zip-full (or equivalent) first."
+
+        if _is_dangerous_path(install_dir):
+            return False, None, f"Refusing to install to dangerous path: {install_dir}"
+
+        # Create directory
+        try:
+            install_dir.mkdir(parents=True, exist_ok=True)
+        except Exception as e:
+            return False, None, f"Could not create directory: {e}"
+
+        # Fetch release info
+        _progress("Fetching latest MO2 release info...")
+        if _cancel_requested():
+            return False, None, "MO2 setup cancelled."
+        try:
+            resp = requests.get(self.GITHUB_API, timeout=15, verify=True)
+            resp.raise_for_status()
+            release = resp.json()
+        except Exception as e:
+            return False, None, f"Failed to fetch MO2 release info: {e}"
+
+        # Find asset
+        asset = None
+        for a in release.get('assets', []):
+            if self.ASSET_PATTERN.match(a['name']):
+                asset = a
+                break
+        if not asset:
+            return False, None, "Could not find main MO2 .7z asset in latest release."
+
+        # Download
+        archive_path = install_dir / asset['name']
+        _progress(f"Downloading {asset['name']}...")
+        if _cancel_requested():
+            return False, None, "MO2 setup cancelled."
+        try:
+            with requests.get(asset['browser_download_url'], stream=True, timeout=120, verify=True) as r:
+                r.raise_for_status()
+                with open(archive_path, 'wb') as f:
+                    for chunk in r.iter_content(chunk_size=8192):
+                        if _cancel_requested():
+                            return False, None, "MO2 setup cancelled."
+                        f.write(chunk)
+        except Exception as e:
+            return False, None, f"Failed to download MO2 archive: {e}"
+
+        # Extract
+        _progress(f"Extracting to {install_dir}...")
+        if _cancel_requested():
+            return False, None, "MO2 setup cancelled."
+        try:
+            result = subprocess.run(
+                ['7z', 'x', str(archive_path), f'-o{install_dir}'],
+                stdout=subprocess.PIPE,
+                stderr=subprocess.PIPE,
+                timeout=1200,
+            )
+            if result.returncode != 0:
+                err = result.stderr.decode(errors='ignore')
+                return False, None, f"Extraction failed: {err}"
+        except Exception as e:
+            return False, None, f"Extraction failed: {e}"
+
+        # Validate
+        mo2_exe = install_dir / "ModOrganizer.exe"
+        if not mo2_exe.exists():
+            # MO2 release archives usually extract into a single top-level folder.
+            # Limit search depth to direct children to avoid expensive recursive scans.
+            mo2_exe = None
+            for child in install_dir.iterdir():
+                candidate = child / "ModOrganizer.exe"
+                if candidate.exists():
+                    mo2_exe = candidate
+                    break
+        if not mo2_exe:
+            return False, None, "ModOrganizer.exe not found after extraction."
+
+        # Cleanup archive
+        try:
+            archive_path.unlink()
+        except Exception:
+            pass
+
+        _progress(f"MO2 installed at: {mo2_exe.parent}")
+
+        # Set up Steam shortcut and Proton prefix
+        _progress("Creating Steam shortcut and Proton prefix...")
+        if _cancel_requested():
+            return False, None, "MO2 setup cancelled."
+        try:
+            from .automated_prefix_service import AutomatedPrefixService
+            svc = AutomatedPrefixService()
+            success, prefix_path, app_id, _last_ts = svc.run_working_workflow(
+                shortcut_name=shortcut_name,
+                modlist_install_dir=str(install_dir),
+                final_exe_path=str(mo2_exe),
+                progress_callback=_progress,
+            )
+        except Exception as e:
+            logger.error(f"AutomatedPrefixService failed: {e}")
+            return False, None, f"Prefix setup failed: {e}"
+
+        if not success:
+            return False, None, "Failed to create Steam shortcut or Proton prefix."
+
+        _progress("MO2 setup complete.")
+        return True, app_id, None

jackify/backend/services/modlist_service.py

@@ -246,6 +246,7 @@ class ModlistService(ModlistServiceInstallationMixin):
                 'appid': getattr(context, 'app_id', None),  # Use updated app_id from Steam
                 'engine_installed': getattr(context, 'engine_installed', False),  # Path manipulation flag
                 'download_dir': str(context.download_dir) if getattr(context, 'download_dir', None) else None,
+                'modlist_source': getattr(context, 'modlist_source', None),
             }
             
             debug_callback(f"Configuration context built: {config_context}")
@@ -479,4 +480,4 @@ class ModlistService(ModlistServiceInstallationMixin):
             logger.error("Game type is required")
             return False
         
-        return True 
+        return True 

jackify/backend/services/nexus_premium_service.py

@@ -0,0 +1,98 @@
+"""Nexus Premium status detection service."""
+import time
+import logging
+from typing import Tuple, Optional
+
+import requests
+
+logger = logging.getLogger(__name__)
+
+NEXUS_VALIDATE_URL = "https://api.nexusmods.com/v1/users/validate.json"
+NEXUS_OAUTH_USERINFO_URL = "https://users.nexusmods.com/oauth/userinfo"
+_CACHE_TTL_SECONDS = 3600
+
+
+class NexusPremiumService:
+    """Check and cache Nexus Premium status for the authenticated user."""
+
+    def check_premium_status(
+        self, auth_token: str, is_oauth: bool = False
+    ) -> Tuple[bool, Optional[str]]:
+        """
+        Query Nexus API for premium status.
+
+        Args:
+            auth_token: Nexus API key or OAuth access token.
+            is_oauth: True when auth_token is an OAuth Bearer token.
+
+        Returns:
+            (is_premium, username) — both None/False on failure.
+        """
+        cached = self._read_cache(auth_token, is_oauth=is_oauth)
+        if cached is not None:
+            return cached
+
+        result = self._fetch(auth_token, is_oauth=is_oauth)
+        if result[1] is not None:
+            self._write_cache(auth_token, result, is_oauth=is_oauth)
+        return result
+
+    def _fetch(self, auth_token: str, is_oauth: bool = False) -> Tuple[bool, Optional[str]]:
+        try:
+            if is_oauth:
+                # OAuth path: userinfo endpoint returns membership_roles array.
+                # The validate endpoint is for API keys only.
+                resp = requests.get(
+                    NEXUS_OAUTH_USERINFO_URL,
+                    headers={"Authorization": f"Bearer {auth_token}", "Accept": "application/json"},
+                    timeout=8,
+                )
+                resp.raise_for_status()
+                data = resp.json()
+                roles = data.get("membership_roles") or []
+                is_premium = "premium" in roles
+                username = data.get("name") or data.get("sub")
+            else:
+                resp = requests.get(
+                    NEXUS_VALIDATE_URL,
+                    headers={"apikey": auth_token, "Accept": "application/json"},
+                    timeout=8,
+                )
+                resp.raise_for_status()
+                data = resp.json()
+                is_premium = bool(data.get("is_premium") or data.get("is_supporter"))
+                username = data.get("name")
+            logger.debug(f"Nexus user: {username}, premium={is_premium}, roles={data.get('membership_roles')}")
+            return is_premium, username
+        except Exception as e:
+            logger.debug(f"Nexus premium check failed: {e}")
+            return False, None
+
+    def _cache_key(self, token: str, is_oauth: bool = False) -> str:
+        suffix = "oauth" if is_oauth else "apikey"
+        return f"nexus_premium_cache_{token[:8]}_{suffix}"
+
+    def _read_cache(self, token: str, is_oauth: bool = False) -> Optional[Tuple[bool, Optional[str]]]:
+        try:
+            from jackify.backend.handlers.config_handler import ConfigHandler
+            cfg = ConfigHandler()
+            entry = cfg.get(self._cache_key(token, is_oauth))
+            if not entry:
+                return None
+            if time.time() - entry.get("ts", 0) > _CACHE_TTL_SECONDS:
+                return None
+            return entry["is_premium"], entry.get("username")
+        except Exception:
+            return None
+
+    def _write_cache(self, token: str, result: Tuple[bool, Optional[str]], is_oauth: bool = False) -> None:
+        try:
+            from jackify.backend.handlers.config_handler import ConfigHandler
+            cfg = ConfigHandler()
+            cfg.set(self._cache_key(token, is_oauth), {
+                "is_premium": result[0],
+                "username": result[1],
+                "ts": time.time(),
+            })
+        except Exception:
+            pass

jackify/backend/services/steam_restart_service.py

@@ -200,6 +200,52 @@ def is_flatpak_steam() -> bool:
     return False
 
 
+def ensure_flatpak_steam_filesystem_access(path: "Path") -> bool:
+    """Grant Flatpak Steam filesystem access to the parent of the given path.
+
+    Safe to call on non-Flatpak systems — returns True immediately.
+    Skips if the path is already covered by an existing override.
+    Returns True if access was already present or successfully granted, False on error.
+    """
+    from pathlib import Path as _Path
+    if not is_flatpak_steam():
+        return True
+    flatpak_cmd = _get_flatpak_command()
+    if not flatpak_cmd:
+        logger.warning("Flatpak Steam detected but flatpak command not found — cannot grant filesystem access")
+        return False
+    grant_path = str(_Path(path).parent)
+    env = _get_clean_subprocess_env()
+    try:
+        # Check existing overrides to avoid redundant changes
+        result = subprocess.run(
+            [flatpak_cmd, "override", "--user", "--show", "com.valvesoftware.Steam"],
+            stdout=subprocess.PIPE, stderr=subprocess.DEVNULL,
+            text=True, timeout=10, env=env,
+        )
+        if result.returncode == 0:
+            for line in result.stdout.splitlines():
+                if "filesystems" in line.lower() and grant_path in line:
+                    logger.debug(f"Flatpak Steam already has access to {grant_path}")
+                    return True
+    except Exception as e:
+        logger.debug(f"Could not check existing Flatpak overrides: {e}")
+    try:
+        result = subprocess.run(
+            [flatpak_cmd, "override", "--user", f"--filesystem={grant_path}", "com.valvesoftware.Steam"],
+            stdout=subprocess.DEVNULL, stderr=subprocess.PIPE,
+            text=True, timeout=15, env=env,
+        )
+        if result.returncode == 0:
+            logger.info(f"Granted Flatpak Steam filesystem access to {grant_path}")
+            return True
+        logger.warning(f"flatpak override failed (exit {result.returncode}): {result.stderr.strip()}")
+        return False
+    except Exception as e:
+        logger.warning(f"Failed to grant Flatpak Steam filesystem access: {e}")
+        return False
+
+
 def _get_steam_executable(env=None):
     """Resolve steam executable path for native Steam. Prefer PATH, then common locations."""
     env = env or os.environ

jackify/backend/services/update_service.py

@@ -31,6 +31,7 @@ class UpdateInfo:
     release_date: str
     changelog: str
     download_url: str
+    source: str = "github"
     file_size: Optional[int] = None
     is_critical: bool = False
     is_delta_update: bool = False
@@ -100,9 +101,17 @@ class UpdateService:
                             break
                 
                 if download_url:
+                    # Prefer Nexus CDN for Premium users when release embeds nexus_file_id
+                    release_body = release_data.get('body', '')
+                    nexus_url = self._try_nexus_download_url(release_body)
+                    update_source = "github"
+                    if nexus_url:
+                        download_url = nexus_url
+                        update_source = "nexus"
+
                     # Determine if this is a delta update
                     is_delta = '.delta' in download_url or 'delta' in download_url.lower()
-                    
+
                     # Safety checks to prevent segfault
                     try:
                         # Sanitize string fields
@@ -111,9 +120,9 @@ class UpdateService:
                         safe_date = str(release_data.get('published_at', ''))
                         safe_changelog = str(release_data.get('body', ''))[:1000]  # Limit size
                         safe_url = str(download_url)
-                        
+
                         logger.debug(f"Creating UpdateInfo for version {safe_version}")
-                        
+
                         update_info = UpdateInfo(
                             version=safe_version,
                             tag_name=safe_tag,
@@ -121,7 +130,8 @@ class UpdateService:
                             changelog=safe_changelog,
                             download_url=safe_url,
                             file_size=file_size,
-                            is_delta_update=is_delta
+                            is_delta_update=is_delta,
+                            source=update_source,
                         )
                         
                         logger.debug(f"UpdateInfo created successfully")
@@ -142,6 +152,56 @@ class UpdateService:
             logger.error(f"Unexpected error checking for updates: {e}")
             return None
     
+    def _try_nexus_download_url(self, release_body: str) -> Optional[str]:
+        """
+        If the user is Nexus Premium and the release body embeds nexus_file_id,
+        return a Nexus CDN download URL. Returns None on any failure.
+
+        Release body format expected:
+            nexus_mod_id: 12345
+            nexus_file_id: 67890
+        """
+        import re
+        try:
+            mod_match = re.search(r'nexus_mod_id:\s*(\d+)', release_body, re.IGNORECASE)
+            file_match = re.search(r'nexus_file_id:\s*(\d+)', release_body, re.IGNORECASE)
+            if not file_match:
+                return None
+            nexus_file_id = int(file_match.group(1))
+            nexus_mod_id = int(mod_match.group(1)) if mod_match else None
+
+            from jackify.backend.services.nexus_auth_service import NexusAuthService
+            auth_service = NexusAuthService()
+            token = auth_service.get_auth_token()
+            if not token:
+                return None
+
+            from jackify.backend.services.nexus_premium_service import NexusPremiumService
+            is_premium, _ = NexusPremiumService().check_premium_status(token)
+            if not is_premium:
+                logger.debug("Nexus download skipped: user is not Premium")
+                return None
+
+            if nexus_mod_id is None:
+                return None
+
+            api_url = f"https://api.nexusmods.com/v1/games/site/mods/{nexus_mod_id}/files/{nexus_file_id}/download_link.json"
+            resp = requests.get(
+                api_url,
+                headers={"apikey": token, "Accept": "application/json"},
+                timeout=8,
+            )
+            resp.raise_for_status()
+            links = resp.json()
+            if isinstance(links, list) and links:
+                cdn_url = links[0].get("URI")
+                if cdn_url:
+                    logger.debug(f"Using Nexus CDN URL for update")
+                    return cdn_url
+        except Exception as e:
+            logger.debug(f"Nexus download URL lookup failed: {e}")
+        return None
+
     def _is_newer_version(self, version: str) -> bool:
         """
         Compare versions to determine if update is newer.

jackify/backend/services/vnv_integration_helper.py

@@ -114,7 +114,7 @@ def should_offer_vnv_automation(modlist_name: str, modlist_install_location: Opt
 def run_vnv_automation_if_applicable(
     modlist_name: str,
     modlist_install_location: Path,
-    game_root: Path,
+    game_root: Optional[Path],
     ttw_installer_path: Optional[Path] = None,
     progress_callback: Optional[Callable[[str], None]] = None,
     manual_file_callback: Optional[Callable[[str, str], Optional[Path]]] = None,
@@ -144,10 +144,27 @@ def run_vnv_automation_if_applicable(
 
         logger.info(f"VNV detected: {modlist_name}")
 
+        # Resolve game root for Fallout New Vegas if caller didn't provide one.
+        # CLI flows may pass None and rely on auto-detection.
+        resolved_game_root = game_root
+        if resolved_game_root is None:
+            try:
+                from jackify.backend.handlers.path_handler import PathHandler
+                game_paths = PathHandler().find_vanilla_game_paths()
+                resolved_game_root = game_paths.get('Fallout New Vegas')
+            except Exception as detect_err:
+                logger.debug(f"VNV game root auto-detection failed: {detect_err}")
+
+        if resolved_game_root is None:
+            logger.warning("VNV detected but Fallout New Vegas game root could not be resolved")
+            if progress_callback:
+                progress_callback("VNV automation skipped: Fallout New Vegas path not found")
+            return False, None
+
         # Initialize service
         vnv_service = VNVPostInstallService(
             modlist_install_location=modlist_install_location,
-            game_root=game_root,
+            game_root=resolved_game_root,
             ttw_installer_path=ttw_installer_path
         )
 

jackify/backend/services/wabbajack_installer_service.py

@@ -16,7 +16,8 @@ from ..handlers.config_handler import ConfigHandler
 from ..handlers.wine_utils import WineUtils
 from .native_steam_service import NativeSteamService
 from .steam_restart_service import (
-    start_steam, is_flatpak_steam, is_steam_deck, _get_clean_subprocess_env, robust_steam_restart
+    start_steam, is_flatpak_steam, is_steam_deck, _get_clean_subprocess_env, robust_steam_restart,
+    ensure_flatpak_steam_filesystem_access,
 )
 from .automated_prefix_service import AutomatedPrefixService
 
@@ -48,8 +49,14 @@ class WabbajackInstallerService:
                 if not steam_name.startswith('proton'):
                     steam_name = f"proton_{steam_name}"
                 return path, steam_name
-        path = self.handler.find_proton_experimental()
-        return path, "proton_experimental" if path else None
+        best = WineUtils.select_best_proton()
+        if best:
+            return Path(best['path']), best['steam_compat_name']
+        valve = WineUtils.select_best_valve_proton()
+        if valve:
+            return Path(valve['path']), valve.get('steam_compat_name', 'proton_experimental')
+        logger.error("No Proton version found")
+        return None, None
 
     def install_wabbajack(
         self,
@@ -93,6 +100,9 @@ class WabbajackInstallerService:
         _is_steam_deck = is_steam_deck()
         _is_flatpak = is_flatpak_steam()
 
+        if _is_flatpak:
+            ensure_flatpak_steam_filesystem_access(install_folder)
+
         try:
             # Step 1: Check requirements
             update_progress("Checking requirements...", 1, 5)

jackify/backend/utils/engine_error_parser.py

@@ -0,0 +1,142 @@
+import json
+from typing import Optional
+from jackify.shared.errors import (
+    JackifyError, InstallError, OAuthError,
+    oauth_expired, wabbajack_install_failed, format_technical_context,
+)
+
+
+def _ctx_detail(ctx: dict) -> Optional[str]:
+    if not ctx:
+        return None
+    return format_technical_context(context=ctx)
+
+
+_TYPE_MAP = {
+    "auth_failed": lambda msg, ctx: oauth_expired(),
+    "premium_required": lambda msg, ctx: InstallError(
+        "Nexus Premium Required",
+        msg,
+        suggestion="Jackify requires a Nexus Premium account for automated installs.",
+        solutions=[
+            "Log in to Nexus Mods with a Premium account.",
+            "Non-premium support is planned for a future release.",
+        ],
+    ),
+    "network_error": lambda msg, ctx: InstallError(
+        "Network or Download Failure",
+        msg,
+        suggestion="Check your internet connection and retry.",
+        solutions=[
+            "Verify your internet connection.",
+            "Re-run the install — Wabbajack resumes from where it stopped.",
+            "Check if Nexus Mods is reachable at nexusmods.com.",
+            "Disable VPN or proxy if active.",
+        ],
+        technical=_ctx_detail(ctx),
+    ),
+    "disk_full": lambda msg, ctx: InstallError(
+        "Disk Full",
+        msg,
+        suggestion="Free space on the target drive and retry.",
+        solutions=[
+            "Run: df -h to see available space.",
+            "Delete old modlist downloads or backups.",
+            "Move the install to a larger drive.",
+        ],
+        technical=_ctx_detail(ctx),
+    ),
+    "permission_denied": lambda msg, ctx: InstallError(
+        "Permission Denied",
+        msg,
+        suggestion="Check write permissions on the target path.",
+        solutions=[
+            "Ensure Jackify and Steam are run as the same user.",
+            "Avoid install paths under /usr, /var, or /opt.",
+            f"Check permissions: ls -la {ctx.get('path', '<path>')}",
+        ],
+        technical=_ctx_detail(ctx),
+    ),
+    "archive_corrupt": lambda msg, ctx: InstallError(
+        "Corrupted Archive",
+        msg,
+        suggestion="Re-run the install — Wabbajack will re-download and re-verify the file.",
+        solutions=[
+            "Re-run the install.",
+            "Check available disk space (partial downloads appear corrupt).",
+            "Check Modlist_Install_workflow.log for the specific filename.",
+        ],
+        technical=_ctx_detail(ctx),
+    ),
+    "file_not_found": lambda msg, ctx: InstallError(
+        "File Not Found",
+        msg,
+        suggestion="Check the modlist URL and your game installation paths.",
+        solutions=[
+            "Verify the modlist name is correct.",
+            "Ensure the target game is installed.",
+            "Re-run — the modlist index may have been temporarily unavailable.",
+        ],
+        technical=_ctx_detail(ctx),
+    ),
+    "validation_failed": lambda msg, ctx: InstallError(
+        "Validation Failed",
+        msg,
+        suggestion="Re-run the install to re-download any failed files.",
+        solutions=[
+            "Re-run the install — Wabbajack resumes and re-validates.",
+            "Check available disk space.",
+            "Check Modlist_Install_workflow.log for specific failures.",
+        ],
+        technical=_ctx_detail(ctx),
+    ),
+    "download_stalled": lambda msg, ctx: InstallError(
+        "Downloads Stalled",
+        msg,
+        suggestion="Check your connection and OAuth status, then retry.",
+        solutions=[
+            "Check your internet connection.",
+            "In Settings, confirm Nexus OAuth is active.",
+            "Re-run the install.",
+        ],
+    ),
+}
+
+_EXIT_CODE_MAP = {
+    2: lambda d, c: _TYPE_MAP["auth_failed"](d, c or {}),
+    3: lambda d, c: _TYPE_MAP["network_error"](d, c or {}),
+    4: lambda d, c: _TYPE_MAP["disk_full"](d, c or {}),
+    5: lambda d, c: _TYPE_MAP["validation_failed"](d, c or {}),
+    6: lambda d, c: wabbajack_install_failed(format_technical_context(detail=d, context=c) or d),
+}
+
+
+def parse_engine_error_line(line: str) -> Optional[JackifyError]:
+    """Parse one stderr line. Returns JackifyError or None."""
+    line = line.strip()
+    if not line:
+        return None
+    try:
+        obj = json.loads(line)
+    except (json.JSONDecodeError, ValueError):
+        return None
+    if obj.get("je") != "1":
+        return None
+    if obj.get("level") == "warning":
+        return None
+    error_type = obj.get("type", "engine_error")
+    message = obj.get("message", "An unknown engine error occurred.")
+    context = obj.get("context") or {}
+    factory = _TYPE_MAP.get(error_type)
+    if factory:
+        return factory(message, context)
+    return wabbajack_install_failed(f"[{error_type}] {message}")
+
+
+def error_from_exit_code(exit_code: int, detail: str = "", context: Optional[dict] = None) -> Optional[JackifyError]:
+    """Return a JackifyError based on exit code alone (fallback when no stderr line received)."""
+    factory = _EXIT_CODE_MAP.get(exit_code)
+    if factory:
+        detail_message = detail or f"Engine exited with code {exit_code}."
+        return factory(detail_message, context or {})
+    return None

jackify/backend/utils/modlist_meta.py

@@ -0,0 +1,87 @@
+import json
+import logging
+import re
+from pathlib import Path
+from typing import Optional
+
+logger = logging.getLogger(__name__)
+
+JACKIFY_META_FILE = "jackify_meta.json"
+
+_BYTEARRAY_RE = re.compile(r"@ByteArray\((.+)\)", re.DOTALL)
+
+
+def write_modlist_meta(
+    install_dir: str,
+    modlist_name: str,
+    game_type: Optional[str],
+    install_mode: str = "online",
+    modlist_version: Optional[str] = None,
+) -> bool:
+    """Write jackify_meta.json into install_dir. Returns True on success."""
+    from jackify import __version__ as jackify_version
+    import datetime
+
+    try:
+        meta = {
+            "modlist_name": modlist_name,
+            "game_type": game_type or "",
+            "install_mode": install_mode,
+            "install_date": datetime.datetime.now().isoformat(timespec="seconds"),
+            "jackify_version": jackify_version,
+        }
+        if modlist_version:
+            meta["modlist_version"] = modlist_version
+
+        out = Path(install_dir) / JACKIFY_META_FILE
+        out.write_text(json.dumps(meta, indent=2), encoding="utf-8")
+        logger.debug(f"Wrote modlist meta to {out}")
+        return True
+    except Exception as e:
+        logger.debug(f"Failed to write modlist meta: {e}")
+        return False
+
+
+def read_modlist_meta(install_dir: str) -> Optional[dict]:
+    """Read jackify_meta.json from install_dir. Returns dict or None."""
+    try:
+        meta_path = Path(install_dir) / JACKIFY_META_FILE
+        if not meta_path.exists():
+            return None
+        return json.loads(meta_path.read_text(encoding="utf-8"))
+    except Exception as e:
+        logger.debug(f"Failed to read modlist meta from {install_dir}: {e}")
+        return None
+
+
+def _read_selected_profile(install_dir: str) -> Optional[str]:
+    """Read selected_profile from ModOrganizer.ini, stripping @ByteArray() wrapper."""
+    try:
+        mo2_ini = Path(install_dir) / "ModOrganizer.ini"
+        if not mo2_ini.exists():
+            return None
+        for line in mo2_ini.read_text(encoding="utf-8", errors="ignore").splitlines():
+            if not line.startswith("selected_profile"):
+                continue
+            _, _, value = line.partition("=")
+            value = value.strip()
+            m = _BYTEARRAY_RE.match(value)
+            if m:
+                return m.group(1).strip()
+            return value or None
+    except Exception as e:
+        logger.debug(f"Failed to read selected_profile from {install_dir}: {e}")
+    return None
+
+
+def get_modlist_name(install_dir: str) -> Optional[str]:
+    """Return the best available modlist name for install_dir.
+
+    Priority:
+    1. jackify_meta.json (written by Jackify at install time)
+    2. selected_profile from ModOrganizer.ini (set by modlist author)
+    """
+    meta = read_modlist_meta(install_dir)
+    if meta and meta.get("modlist_name"):
+        return meta["modlist_name"]
+    return _read_selected_profile(install_dir)