subagent transcript

session 17f09f89 · workflow wf_6c234df9
← 17f09f89 · archive
delegated task
GOAL: port PySide6 + shiboken6 to the FreeCAD WebAssembly toolchain (static, no-dlopen, asyncify, no-pthreads) so FreeCAD's Python/PySide workbenches
▸ Magik
GOAL: port PySide6 + shiboken6 to the FreeCAD WebAssembly toolchain (static, no-dlopen, asyncify, no-pthreads) so FreeCAD's Python/PySide workbenches and macros work in the browser. This is the keystone dependency. Ground EVERYTHING in the real files — investigate, do not speculate. ESTABLISHED GROUND TRUTH (verified this session): - PySide+shiboken SOURCE: /tmp/pyside-setup (git branch 6.11, matches Qt). sources/shiboken6, sources/shiboken6_generator, sources/pyside6 (check exact dir names). Built via setup.py + coin_build_instructions.py OR raw CMake per sources/*/CMakeLists.txt + README.*.md at repo root. - HOST toolchain (x86-64 Linux): clang/llvm 21 with libclang at /usr/lib/llvm-21/lib/libclang.so (llvm-config = 21.1.8); host CPython 3.14.4 (/usr/bin/python3, headers /opt/toolchains/src/Python-3.14.4/Include); host Qt 6.11.1 at /opt/toolchains/qt/6.11.1/gcc_64. - TARGET (wasm): emscripten 4.0.12 (/opt/toolchains/emsdk); Qt 6.11.1 asyncify single-thread at /opt/toolchains/qt-asyncify/6.11.1/wasm_singlethread (QT_FEATURE_thread == -1, i.e. -no-feature-thread); wasm CPython 3.14 at /opt/toolchains/python-wasm (headers include/python3.14, lib/python3.14.zip). FreeCAD-wasm build dir: /opt/toolchains/src/freecad-gui-build (reads Qt6_DIR=qt-asyncify/.../wasm_singlethread). - FreeCAD build links Python C-extensions STATICALLY and registers them via PyImport_AppendInittab in a generated src/Main/WasmInittab*.cpp (NO dlopen on wasm). PySide bindings must follow this model: build as STATIC libs, expose PyInit_* for each module (PySide6.QtCore etc.), register in the inittab. - FreeCAD source: /home/magik6k/lcad-wasm/freecad-port/FreeCAD (branch wasm-port). It ships a PySide shim at src/Ext/PySide (a compat layer) and uses shiboken (getCppPointer/wrapInstance) e.g. in Gui/PythonWrapper.cpp. FREECAD_USE_PYSIDE/FREECAD_USE_SHIBOKEN currently OFF. - KNOWN HARD ISSUES to design around: (1) static + NO dlopen — PySide's normal build emits shared modules; must emit static + inittab. (2) Qt is -no-feature-thread — shiboken typesystem for QtCore references QThread/QMutex/etc.; those must be excluded/guarded. (3) CPython 3.14 C-API changes vs what PySide 6.11 targets. (4) asyncify + JS-exceptions (-fexceptions) flags must match FreeCAD's; libshiboken/libpyside signal dispatch must be single-thread/asyncify safe. (5) binary size (wasm is already 196 MB; each Qt binding module is tens of MB — target ONLY the modules FreeCAD needs). DELIVERABLES — do BOTH: 1. Write a thorough, concrete, execution-ready plan to /home/magik6k/lcad-wasm/pyside-port/<SLUG>/plan.md with exact commands, cmake args, file paths, patch snippets (precise enough to apply), and any test outputs you gathered. Put patch/new-file contents as separate files in that dir. If you build/test something, capture the real output. 2. Return the structured summary (schema). Depth goes in plan.md; keep summary fields tight. Token cost is not a concern — be exhaustive and correct. Prefer running real commands (grep, ls, cmake --help, small test builds) over speculation. === YOUR SCOPE: FreeCAD's exact PySide/shiboken API surface (minimal binding scope) (slug: fc-pyside-usage) === Determine the MINIMAL set of Qt modules + classes + shiboken functions FreeCAD actually needs, so we bind only those (size!). Grep /home/magik6k/lcad-wasm/freecad-port/FreeCAD/src for: shiboken (getCppPointer, wrapInstance, Shiboken::), PySide imports across all Mod/*/*.py and Ext/PySide, Gui::PythonWrapper (PythonWrapper.cpp/.h), FreeCADGui.PySideUic/loadUi, and which Qt modules appear (QtCore/QtGui/QtWidgets/QtSvg/QtNetwork/QtPrintSupport/QtUiTools/...). Also check what the built-but-Python-gated workbenches (Draft, the PartDesign gear/sprocket, task dialogs) import. Output a ranked module list (must-have vs optional) and the specific classes/methods hit, plus whether FreeCAD needs QtUiTools (loadUi) — that pulls the ui parser. Create /home/magik6k/lcad-wasm/pyside-port/fc-pyside-usage/ and write plan.md (required) + any patches. Return the schema with deliverableFile=/home/magik6k/lcad-wasm/pyside-port/fc-pyside-usage/plan.md.
Fable
thinking
I'm diving into the FreeCAD codebase to figure out what minimal PySide and shiboken APIs are actually needed.
Fable
I'll investigate the FreeCAD source to determine the minimal PySide/shiboken API surface. Let me start exploring.
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && git branch --show-current 2>/dev/null; echo \"---\"; ls src/Ext/PySide 2>/dev/null; echo \"--- PythonWrapper ---\"; ls -la src/Gui/PythonWrapper.* 2>/dev/null", "description": …
Fable
⚙ Bash {"command": "mkdir -p /home/magik6k/lcad-wasm/pyside-port/fc-pyside-usage; echo done", "description": "Create output dir"}
tool result
wasm-port
---
--- PythonWrapper ---
-rw-r--r-- 1 agent agent 30730 Jul  3 17:58 src/Gui/PythonWrapper.cpp
-rw-r--r-- 1 agent agent  3592 Jul  3 17:58 src/Gui/PythonWrapper.h
tool result
done
Fable
thinking
I need to verify whether Ext/PySide was included in the list.
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && find src/Ext -maxdepth 2 -iname '*pyside*' -o -maxdepth 2 -iname 'PySide' 2>/dev/null | head; echo \"--- ls src/Ext ---\"; ls src/Ext; echo \"--- find PySide dir ---\"; find sr…
Fable
⚙ Read {"file_path": "/home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Gui/PythonWrapper.h"}
tool result
1	/***************************************************************************
2	 *   Copyright (c) 2021 Werner Mayer <wmayer[at]users.sourceforge.net>     *
3	 *                                                                         *
4	 *   This file is part of the FreeCAD CAx development system.              *
5	 *                                                                         *
6	 *   This library is free software; you can redistribute it and/or         *
7	 *   modify it under the  …[truncated]
tool result
--- ls src/Ext ---
CMakeLists.txt
freecad
--- find PySide dir ---
src/Tools/embedded/PySide
src/Tools/typing/inputs/overlays/PySide
Fable
thinking
Looking at the PythonWrapper.h file, I can see it loads several Qt modules at the C++ level: QtCore, QtGui, QtWidgets, QtPrintSupport, and QtUiTools. Now I need to check the .cpp file to see how shiboken is being used for module loading.
Fable
⚙ Read {"file_path": "/home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Gui/PythonWrapper.cpp"}
tool result
1	/***************************************************************************
2	 *   Copyright (c) 2021 Werner Mayer <wmayer[at]users.sourceforge.net>     *
3	 *                                                                         *
4	 *   This file is part of the FreeCAD CAx development system.              *
5	 *                                                                         *
6	 *   This library is free software; you can redistribute it and/or         *
7	 *   modify it under the  …[truncated]
Fable
thinking
Now I'm looking at the core C++ shiboken surface, particularly how UiLoader from QtUiTools integrates with the Ext/freecad PySide shim, and I need to trace the Python usages across the codebase. The key shiboken API surface involves module imports and type management, object lifecycle handling with validity and parent tracking, and conversion functions that bridge Python and C++ pointer types.
Fable
Now let me look at UiLoader (QtUiTools), the PySide shim, and grep the Python usage across the codebase.
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && ls src/Gui/UiLoader.* 2>/dev/null; echo \"=== find freecad PySide shim ===\"; find src/Ext/freecad -maxdepth 3 -iname '*pyside*' 2>/dev/null; echo \"=== ls src/Ext/freecad ===\…
tool result
src/Gui/UiLoader.cpp
src/Gui/UiLoader.h
=== find freecad PySide shim ===
=== ls src/Ext/freecad ===
CMakeLists.txt
UiTools.py
__init__.py.template
freecad_doc.py
module_io.py
part.py
partdesign.py
project_utility.py
sketcher.py
utils.py
utils_zip.py
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && grep -rn \"PySideUic\\|loadUi\\|loadUiType\\|UiLoader\\|QUiLoader\" src/Gui/*.cpp src/Gui/*.h 2>/dev/null | head -40", "description": "Find loadUi/UiLoader usages in Gui"}
tool result
src/Gui/Application.cpp:108:#include "UiLoader.h"
src/Gui/Application.cpp:625:        UiLoaderPy::init_type();
src/Gui/Application.cpp:626:        Base::Interpreter().addType(UiLoaderPy::type_object(), module, "UiLoader");
src/Gui/Application.cpp:634:        PyModule_AddObject(module, "PySideUic", Base::Interpreter().addModule(new PySideUicModule));
src/Gui/PropertyPage.cpp:34:#include "UiLoader.h"
src/Gui/PropertyPage.cpp:124:    auto loader = UiLoader::newInstance();
src/Gui/PythonWrapper.cp  …[truncated]
Fable
thinking
Looking at UiLoader.cpp, I can see it wraps QtUiTools's QUiLoader through PySide by importing PySide6.QtUiTools and calling member functions on that module, which confirms QtUiTools is required for loadUi to work.

Now I'm searching through the codebase to see which Qt modules are being imported in Python and understand the overall dependency pattern.
Fable
Let me read UiLoader.cpp and the PySide shim (src/Ext/freecad/__init__ template references), then grep Python imports.
Fable
⚙ Read {"file_path": "/home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Gui/UiLoader.cpp"}
tool result
1	/***************************************************************************
2	 *   Copyright (c) 2021 Werner Mayer <wmayer[at]users.sourceforge.net>     *
3	 *                                                                         *
4	 *   This file is part of the FreeCAD CAx development system.              *
5	 *                                                                         *
6	 *   This library is free software; you can redistribute it and/or         *
7	 *   modify it under the  …[truncated]
Fable
thinking
I'm noticing there's a conditional compilation flag for WASM where `HAVE_QT_UI_TOOLS` determines whether to use Qt's native QUiLoader or fall back to PySide's QtUiTools wrapper through Python. I need to check if QtUiTools is actually available in the Qt-asyncify build and look at how the fallback mechanism works when importing `freecad.UiTools`.

Now I'm searching through the codebase for all PySide imports across the modules and extensions to understand the Qt dependency surface.
Fable
Let me check UiTools.py and grep all PySide imports across the codebase.
Fable
⚙ Read {"file_path": "/home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Ext/freecad/UiTools.py"}
tool result
1	# SPDX-License-Identifier: LGPL-2.1-or-later
2	
3	# (c) 2021 Werner Mayer LGPL
4	
5	from PySide import QtUiTools
6	import FreeCADGui as Gui
7	
8	
9	class QUiLoader(QtUiTools.QUiLoader):
10	    """
11	    This is an extension of Qt's QUiLoader to also create custom widgets
12	    """
13	    def __init__(self, arg = None):
14	        super(QUiLoader, self).__init__(arg)
15	        self.ui = Gui.PySideUic
16	
17	    def createWidget(self, className, parent = None, name = ""):
18	        widget =   …[truncated]
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && echo \"=== unique Qt submodules imported via 'from PySide[6]?.<Mod> import' or 'from PySide import <Mod>' ===\"; grep -rhoE \"from PySide[26]?[^ ]* import [A-Za-z0-9_, ]+\" src…
tool result
=== unique Qt submodules imported via 'from PySide[6]?.<Mod> import' or 'from PySide import <Mod>' ===
    229 .QtCoreimportQT_TRANSLATE_NOOP
    169 importQtGui
    136 importQtCore,QtGui
    134 importQtCore
     27 importQtWidgets
     26 importQtGui,QtCore
     17 importQtCore,QtWidgets
     16 importQtCore,QtGui,QtWidgets
     12 WrapperimportQtCore,QtWidgets
      9 WrapperimportQtWidgets
      7 WrapperimportQtCore,QtGui,QtWidgets
      5 .QtWidgetsimportQApplication
      5 .QtGuiimportQ  …[truncated]
Fable
thinking
I need to track down the PySide compatibility shim in the FreeCAD source tree. My memory suggested it's under src/Ext/PySide, but that path doesn't seem to exist where I expected it. Let me search more systematically to find where the PySide import mapping is actually located.
Fable
Let me find the PySide compat shim and get a per-module usage tally including which distinguish QtGui vs QtWidgets classes.
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && echo \"=== locate PySide shim (top-level 'PySide' python package) ===\"; find src -path '*PySide/__init__.py' 2>/dev/null; find src -name '__init__.py' -path '*PySide*' 2>/dev/…
tool result
=== locate PySide shim (top-level 'PySide' python package) ===
=== any dir literally named PySide ===
src/Tools/embedded/PySide
src/Tools/typing/inputs/overlays/PySide
=== grep for the shim definition of QtGui/QtWidgets mapping ===
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && echo \"=== per-Qt-module mention count across ALL .py (import lines only) ===\"; grep -rhoE \"\\b(QtCore|QtGui|QtWidgets|QtSvg|QtSvgWidgets|QtNetwork|QtPrintSupport|QtUiTools|Q…
tool result
=== per-Qt-module mention count across ALL .py (import lines only) ===
   3555 QtCore
   3502 QtGui
    848 QtWidgets
     76 QtNetwork
     20 QtSvg
      9 QtSvgWidgets
      7 QtUiTools
      6 QtWebEngineWidgets
      5 QtOpenGL
      2 QtOpenGLWidgets
Fable
thinking
I need to locate the PySide compatibility shim in the FreeCAD repository. It's supposed to be somewhere in the codebase, possibly as a data file rather than in the src directory, so I'm going to search through the entire repository tree to find where the PySide package shim is defined that handles the mapping from PySide to PySide6.
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && echo \"=== find files that build the PySide compat package ===\"; grep -rln \"This module.*PySide\\|Compatibility.*PySide\\|import PySide6\\|from PySide6\" src --include=*.py 2…
tool result
=== find files that build the PySide compat package ===
src/3rdParty/pivy/pivy/qt/__init__.py
src/3rdParty/pivy/pivy/qt/QtCore/__init__.py
src/3rdParty/pivy/pivy/qt/QtOpenGL/__init__.py
src/3rdParty/pivy/pivy/qt/QtGui/__init__.py
src/3rdParty/pivy/pivy/qt/QtWidgets/__init__.py
src/Mod/AddonManager/PySideWrapper.py
src/Mod/AddonManager/addonmanager_freecad_interface.py
src/Mod/AddonManager/addonmanager_dependency_installer.py
src/Mod/AddonManager/addonmanager_uninstaller_gui.py
src/Mod/AddonManag  …[truncated]
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && grep -rln \"PySide\" cMake CMakeLists.txt cmake 2>/dev/null; echo \"=== global search for a 'PySide' package init that re-exports Qt modules ===\"; grep -rln \"QtWidgets = \\|s…
tool result
cMake/FindPySide6.cmake
cMake/FreeCAD_Helpers/CopyLibpackDirectories.cmake
cMake/FindPySide2Tools.cmake
cMake/FindPySide6Tools.cmake
cMake/FreeCAD_Helpers/PrintFinalReport.cmake
cMake/FreeCAD_Helpers/SetupShibokenAndPyside.cmake
cMake/FreeCAD_Helpers/CheckInterModuleDependencies.cmake
cMake/FreeCAD_Helpers/SetupCoin3D.cmake
=== global search for a 'PySide' package init that re-exports Qt modules ===
=== check Ext/CMakeLists ===
# SPDX-License-Identifier: LGPL-2.1-or-later

# this directory is th  …[truncated]
Fable
thinking
I need to track down where the top-level PySide package is defined—it's got to be somewhere in the repo, so I'm searching through everything including files outside the src directory.
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && find . -path ./.git -prune -o -type d -name PySide -print 2>/dev/null; echo \"=== find the compat init that re-exports Qt from PySide6 ===\"; grep -rln \"from PySide6 import\\|…
Fable
⚙ Read {"file_path": "/home/magik6k/lcad-wasm/freecad-port/FreeCAD/cMake/FreeCAD_Helpers/SetupShibokenAndPyside.cmake"}
tool result
1	macro(SetupShibokenAndPyside)
2	# -------------------------------- Shiboken/PySide ------------------------
3	
4	    option(FREECAD_USE_SHIBOKEN "Links to the shiboken library at build time. If OFF its Python module is imported at runtime" ON)
5	    option(FREECAD_USE_PYSIDE "Links to the PySide libraries at build time." ON)
6	
7	    if(DEFINED MACPORTS_PREFIX)
8	        find_package(Shiboken REQUIRED HINTS "${PYTHON_LIBRARY_DIR}/cmake")
9	        find_package(PySide REQUIRED HINTS "${PYTHON_L  …[truncated]
tool result
./src/Tools/embedded/PySide
./src/Tools/typing/inputs/overlays/PySide
=== find the compat init that re-exports Qt from PySide6 ===
=== the PySide shim referenced in memory: search for text 'PySide' package shim in Ext ===
src/Ext/freecad:
CMakeLists.txt
UiTools.py
__init__.py.template
freecad_doc.py
module_io.py
part.py
partdesign.py
project_utility.py
sketcher.py
utils.py
utils_zip.py
Fable
thinking
So the PySide compatibility shim is built at compile time in the binary directory, creating a set of wrapper modules that re-export everything from PySide6—QtCore, QtNetwork, and QtGui each get their own module that imports all their contents, with QtGui also pulling in QtWidgets to merge them together. The shim files themselves don't require the actual bindings to exist until they're imported, so for the wasm port I should focus on which modules are actually reached by the code paths we're building. I need to trace through where loadPrintSupportModule and loadUiToolsModule are called in the C++ code, and determine whether QtNetwork, QtSvg, and QtWebEngine are actually used in the target wor  …
Fable
The compat shim is key: `from PySide import QtGui` pulls in BOTH PySide6.QtGui and PySide6.QtWidgets. Now let me pin down where the C++ loads QtPrintSupport/QtUiTools, and which modules the gated workbenches (Draft, PartDesign) actually reach.
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && echo \"=== callers of load*Module in C++ ===\"; grep -rn \"loadPrintSupportModule\\|loadUiToolsModule\\|loadWidgetsModule\\|loadGuiModule\\|loadCoreModule\" src --include=*.cpp…
tool result
=== callers of load*Module in C++ ===
src/Gui/MDIViewPyWrap.cpp:79:        wrap.loadWidgetsModule();
src/Gui/MDIViewPyWrap.cpp:116:        wrap.loadPrintSupportModule();
src/Gui/ApplicationPy.cpp:1596:    wrap.loadGuiModule();
src/Gui/ApplicationPy.cpp:1597:    wrap.loadWidgetsModule();
src/Gui/EditableDatumLabelPyImp.cpp:406:        wrap.loadWidgetsModule();
src/Gui/CommandPyImp.cpp:290:        wrap.loadWidgetsModule();
src/Gui/ExpressionBindingPy.cpp:43:    wrap.loadWidgetsModule();
src/Gu  …[truncated]
Fable
thinking
QtPrintSupport is only used internally at the C++ level for printing views, so it doesn't need Python bindings. QtWebEngine is optional and heavy, only imported by Help.py, so it can be excluded. QtSvgWidgets is used by optional workbenches like Arch and MaterialEditor. QtOpenGL supports pivy quarter for Coin3D integration, though FreeCAD's WebAssembly build uses a different viewport approach.

Now I need to check which workbenches are actually enabled in the WebAssembly GUI build and which ones are gated behind Python imports. I should look at the build configuration to see which modules are enabled, then examine what Draft, Sketcher, and PartDesign actually import. For the shiboken generat  …
Fable
QtPrintSupport is C++-only (printing), no Python imports. Let me check which Mods are enabled in the wasm build and what Draft/Sketcher/PartDesign import.
Fable
⚙ Bash {"command": "cd /opt/toolchains/src/freecad-gui-build 2>/dev/null && grep -E \"BUILD_(DRAFT|SKETCHER|PART_DESIGN|PART|ARCH|BIM|FEM|TECHDRAW|MESH|ADDONMANAGER|GUI|SANDBOX|TEST|WEB|HELP|MATERIAL|SPREADSHEET|SHIPS|SURFACE|POINTS):\" CMakeCache…
tool result
BUILD_BIM:BOOL=OFF
BUILD_DRAFT:BOOL=OFF
BUILD_FEM:BOOL=OFF
BUILD_GUI:BOOL=ON
BUILD_HELP:BOOL=OFF
BUILD_MATERIAL:BOOL=ON
BUILD_MESH:BOOL=OFF
BUILD_PART:BOOL=ON
BUILD_PART_DESIGN:BOOL=ON
BUILD_POINTS:BOOL=OFF
BUILD_SKETCHER:BOOL=ON
BUILD_SPREADSHEET:BOOL=ON
BUILD_SURFACE:BOOL=ON
BUILD_TECHDRAW:BOOL=OFF
BUILD_TEST:BOOL=OFF
BUILD_WEB:BOOL=OFF
E57_BUILD_TEST:BOOL=OFF
=== FREECAD_USE flags ===
BUILD_GUI:BOOL=ON
FREECAD_USE_PYSIDE:BOOL=OFF
FREECAD_USE_SHIBOKEN:BOOL=OFF
FREECAD_QT_MAJOR_VERSION:INTERNAL  …[truncated]
Fable
thinking
Looking at which modules are enabled in the wasm build—Material, Part, PartDesign, Sketcher, Spreadsheet, Surface, plus the GUI and import utilities—I need to identify the essential Python surface that covers these. That means I'm focusing on Part, PartDesign, Sketcher, Spreadsheet, Surface, Material, and the core Gui components. Now I'm searching through the Qt module imports specifically within these enabled modules and the src/Gui directory to see what's actually being used.
Fable
Now let me scope the Qt module imports to only the enabled Mods (Part, PartDesign, Sketcher, Spreadsheet, Surface, Material) plus core Gui/Ext.
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && DIRS=\"src/Gui src/App src/Base src/Ext src/Main src/Mod/Part src/Mod/PartDesign src/Mod/Sketcher src/Mod/Spreadsheet src/Mod/Surface src/Mod/Material\"; echo \"=== Qt module m…
tool result
=== Qt module mentions in ENABLED scope (.py) ===
    205 QtCore
    203 QtGui
     10 QtWidgets
      3 QtSvgWidgets
      2 QtUiTools

=== files importing QtNetwork/QtSvg/QtSvgWidgets in enabled scope ===
src/Mod/Material/MaterialEditor.py
Fable
thinking
I'm checking which Qt modules are available in the enabled scope — QtCore, QtGui with its shim that includes QtWidgets, QtWidgets itself, QtSvgWidgets for MaterialEditor, and QtUiTools for loadUi — and I need to verify whether MaterialEditor's QtSvgWidgets dependency is optional or guarded, plus trace through the QtUiTools usages. I should also look into the shiboken C++ API and how FREECAD_USE_SHIBOKEN factors in.

With FREECAD_USE_SHIBOKEN currently OFF, FreeCAD relies on the Python fallback path where shiboken and PySide modules are imported at runtime, so the minimal binding set is just what those Python imports require — specifically getCppPointer and wrapInstance from the shiboken6 mod  …
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && echo \"=== MaterialEditor QtSvgWidgets lines ===\"; grep -n \"QtSvgWidgets\\|QSvgWidget\\|QtSvg\" src/Mod/Material/MaterialEditor.py; echo; echo \"=== QtUiTools in enabled scop…
tool result
=== MaterialEditor QtSvgWidgets lines ===
32:from PySide import QtCore, QtGui, QtSvgWidgets
97:        self.widget.PreviewRender = QtSvgWidgets.QSvgWidget(self.iconPath + "preview-rendered.svg")
101:        self.widget.PreviewVector = QtSvgWidgets.QSvgWidget(self.iconPath + "preview-vector.svg")

=== QtUiTools in enabled scope ===
src/Mod/Part/AttachmentEditor/TaskAttachmentEditor.py:55:    from FreeCADGui import PySideUic as uic
src/Mod/Part/AttachmentEditor/TaskAttachmentEditor.py:281:         …[truncated]
Fable
thinking
I'm confirming that PartDesign, Part AttachmentEditor, and Material all rely on `PySideUic.loadUi` and `UiLoader`, which means QtUiTools binding is essential for those task dialogs. Now I need to track down where shiboken's `wrapInstance` and `getCppPointer` are being used to understand the full Python API surface, and I'm also verifying the loadUi implementation path.

The key question is whether HAVE_QT_UI_TOOLS is defined in the wasm build — if it is, FreeCAD uses the native Qt QUiLoader directly without needing the PySide QtUiTools binding, but the Python freecad.UiTools module still imports from PySide. I need to check whether Qt-asyncify was built with the uitools module and whether HA  …
Fable
Let me check whether native QtUiTools (HAVE_QT_UI_TOOLS) is available in the Qt-asyncify build, and where wrapInstance is used in Python.
Fable
⚙ Bash {"command": "echo \"=== Qt6UiTools in asyncify Qt ===\"; ls /opt/toolchains/qt-asyncify/6.11.1/wasm_singlethread/lib/ 2>/dev/null | grep -i uitools; ls /opt/toolchains/qt-asyncify/6.11.1/wasm_singlethread/lib/cmake/ 2>/dev/null | grep -i ui…
tool result
=== Qt6UiTools in asyncify Qt ===
libQt6UiTools.a
libQt6UiTools.prl
Qt6UiTools
Qt6UiToolsPrivate
=== other Qt modules present in asyncify build ===
libQt6BundledLibjpeg
libQt6BundledLibpng
libQt6BundledPcre
libQt6Concurrent
libQt6Core
libQt6Gui
libQt6Network
libQt6OpenGL
libQt6OpenGLWidgets
libQt6PrintSupport
libQt6Sql
libQt6Svg
libQt6SvgWidgets
libQt6Test
libQt6UiTools
libQt6Widgets
libQt6Xml
=== HAVE_QT_UI_TOOLS references in FreeCAD ===
cMake/UseLibPackCLbundler.cmake:39:set (Qt5UiTools_DIR $  …[truncated]
Fable
thinking
I need to find where HAVE_QT_UI_TOOLS is defined.
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && grep -rn \"HAVE_QT_UI_TOOLS\" src cMake 2>/dev/null; echo \"=== available Qt6 libs FULL list asyncify ===\"; ls /opt/toolchains/qt-asyncify/6.11.1/wasm_singlethread/lib/*.a | x…
tool result
src/Gui/UiLoader.h:26:# define HAVE_QT_UI_TOOLS
src/Gui/UiLoader.h:29:#if defined(HAVE_QT_UI_TOOLS)
src/Gui/UiLoader.h:49:#if !defined(HAVE_QT_UI_TOOLS)
src/Gui/UiLoader.cpp:223:#if !defined(HAVE_QT_UI_TOOLS)
src/Gui/UiLoader.cpp:744:#if !defined(HAVE_QT_UI_TOOLS)
=== available Qt6 libs FULL list asyncify ===
libQt6Network.a
libQt6PrintSupport.a
libQt6Svg.a
libQt6SvgWidgets.a
libQt6UiTools.a
=== wrapInstance/getCppPointer python locations ===
src/3rdParty/pivy/tests/pyside_test.py:12:        …[truncated]
Fable
thinking
I need to check the UiLoader.h file to see what conditions define HAVE_QT_UI_TOOLS.
Fable
⚙ Read {"file_path": "/home/magik6k/lcad-wasm/freecad-port/FreeCAD/src/Gui/UiLoader.h", "limit": 55}
tool result
1	/***************************************************************************
2	 *   Copyright (c) 2021 Werner Mayer <wmayer[at]users.sourceforge.net>     *
3	 *                                                                         *
4	 *   This file is part of the FreeCAD CAx development system.              *
5	 *                                                                         *
6	 *   This library is free software; you can redistribute it and/or         *
7	 *   modify it under the  …[truncated]
Fable
thinking
The Qt UI tools are available natively on non-MinGW builds through FreeCAD's C++ UiLoader, so we don't need a PySide6 binding for that. However, the Python `loadUi` function still works through the same native path via FreeCADGui.UiLoader without importing PySide6.QtUiTools directly. The compat shim does provide a PySide/QtUiTools.py module, but it's only loaded if Python code explicitly imports from PySide.QtUiTools — and checking the enabled scope, the only references to QtUiTools are in freecad.UiTools, which is only imported by the C++ UiLoader in a branch that doesn't compile on wasm. So the PySide QtUiTools binding turns out to be optional for this build.

QtPrintSupport is also option  …
Fable
Native Qt6UiTools is used on wasm (HAVE_QT_UI_TOOLS defined on non-MinGW), so no PySide QtUiTools binding needed. Let me check thread-class usage (Qt is -no-feature-thread) and the top QtWidgets/QtGui classes in enabled scope.
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && DIRS=\"src/Gui src/App src/Base src/Ext src/Main src/Mod/Part src/Mod/PartDesign src/Mod/Sketcher src/Mod/Spreadsheet src/Mod/Surface src/Mod/Material\"; echo \"=== thread/conc…
tool result
=== thread/concurrency Qt classes in enabled python ===
=== does any enabled python do 'from PySide import QtUiTools' or 'import QtUiTools' ===
src/Ext/freecad/UiTools.py:5:from PySide import QtUiTools
src/Ext/freecad/UiTools.py:9:class QUiLoader(QtUiTools.QUiLoader):
=== top QtWidgets classes used (enabled scope) ===
      2 QtWidgets.QDialogButtonBox
      1 QtWidgets.QWidget
      1 QtWidgets.QPushButton
      1 QtWidgets.QLabel
      1 QtWidgets.QDockWidget
      1 QtWidgets.QApplication
Fable
thinking
Checking whether any other Python modules import freecad.UiTools directly, since the QtUiTools import in UiTools.py is only used in a non-WASM code path and shouldn't be an issue otherwise.

Now I need to look at the actual usage patterns — most QtGui and QtWidgets calls go through the PySide shim where QtGui merges both modules, so I should characterize the top QtGui classes being used and how Signal/Slot/Property are being invoked, since those are what drive the libpyside surface.
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && DIRS=\"src/Gui src/App src/Base src/Ext src/Main src/Mod/Part src/Mod/PartDesign src/Mod/Sketcher src/Mod/Spreadsheet src/Mod/Surface src/Mod/Material\"; echo \"=== top QtGui.*…
tool result
=== top QtGui.* (shim=QtGui+QtWidgets) classes ===
     54 QtGui.QMessageBox
     25 QtGui.QApplication
     19 QtGui.QDialogButtonBox
      9 QtGui.QLineEdit
      8 QtGui.QStandardItem
      8 QtGui.QLabel
      8 QtGui.QIcon
      5 QtGui.QDoubleSpinBox
      4 QtGui.QComboBox
      3 QtGui.QVBoxLayout
      3 QtGui.QDialog
      3 QtGui.QAbstractSpinBox
      2 QtGui.QPixmap
      2 QtGui.QMouseEvent
      2 QtGui.QMdiArea
      2 QtGui.QListWidgetItem
      2 QtGui.QKeyEvent
      2 QtGui.Q  …[truncated]
Fable
thinking
I'm noticing that the Qt imports are split between QtGui and QtWidgets because the shim layer combines them together, so I need bindings for both modules. The signal system uses `.connect()` for establishing connections, though the thought cuts off there.

Looking at what comes next, the signal and slot mechanism relies on libpyside's signal manager which needs to be thread-safe for asyncify, and QTimer is used throughout the codebase but that's fine since it's event-driven. I have enough context now to write out the plan and patch files, then return the schema. I should also check the AddonManager's PySideWrapper to see if it's relevant — it looks like a compatibility wrapper but the AddonM  …
Fable
Let me quickly check the WasmInittab registration model to ground the binding-registration recommendation.
Fable
⚙ Bash {"command": "cd /home/magik6k/lcad-wasm/freecad-port/FreeCAD && find . -path ./.git -prune -o -iname 'WasmInittab*' -print 2>/dev/null; find /opt/toolchains/src/freecad-gui-build -iname 'WasmInittab*' 2>/dev/null | head; echo \"=== sample i…
tool result
/opt/toolchains/src/freecad-gui-build/src/Main/WasmInittabGui.cpp
/opt/toolchains/src/freecad-gui-build/src/Main/WasmInittab.cpp
/opt/toolchains/src/freecad-gui-build/src/Main/CMakeFiles/FreeCADMain.dir/WasmInittabGui.cpp.o
=== sample inittab entries (PyInit_ registrations) ===
file: /opt/toolchains/src/freecad-gui-build/src/Main/WasmInittabGui.cpp
3:extern "C" PyObject* PyInit_Part();
4:extern "C" PyObject* PyInit_Sketcher();
5:extern "C" PyObject* PyInit__PartDesign();
6:extern "C" PyObject* P  …[truncated]
Fable
thinking
I need to examine the full WasmInittab.cpp file to understand how modules are named and registered, particularly since PySide uses dotted naming conventions like PySide6.QtCore that require registering both the parent package and submodules.
Fable
⚙ Read {"file_path": "/opt/toolchains/src/freecad-gui-build/src/Main/WasmInittab.cpp"}
tool result
1	// Generated by src/Main/CMakeLists.txt (wasm port)
2	#include <Python.h>
3	extern "C" PyObject* PyInit_Part();
4	extern "C" PyObject* PyInit_Sketcher();
5	extern "C" PyObject* PyInit__PartDesign();
6	extern "C" PyObject* PyInit_Spreadsheet();
7	extern "C" PyObject* PyInit_Materials();
8	extern "C" PyObject* PyInit_Measure();
9	extern "C" PyObject* PyInit_Surface();
10	extern "C" PyObject* PyInit_Import();
11	void freecadWasmRegisterInittab()
12	{
13	    PyImport_AppendInittab("Part", PyInit_P  …[truncated]
Fable
thinking
I'm realizing that dotted module names like `PySide6.QtCore` can be registered directly with `PyImport_AppendInittab`, since CPython's import system checks the inittab for the full dotted name. However, the parent package `PySide6` needs to exist first—normally it's a Python package with an `__init__.py`, but in a static build model I'd need to handle that differently.

Now I'm compiling my findings into a plan: the enabled modules on wasm are Part, PartDesign, Sketcher, Spreadsheet, Surface, Material, Measure, and Import with Gui. Looking at the C++ wrapper layer, the load methods reference QtCore, QtGui, QtWidgets, QtPrintSupport, and QtUiTools, though QtUiTools isn't actually needed since  …
Fable
I have a complete picture. Let me write the deliverable plan.md and supporting files.
Fable
⚙ Write {"file_path": "/home/magik6k/lcad-wasm/pyside-port/fc-pyside-usage/plan.md", "content": "# FreeCAD's exact PySide/shiboken API surface (minimal binding scope)\n\nScope owner: `fc-pyside-usage`.\nGoal: determine the MINIMAL set of Qt binding…
tool result
File created successfully at: /home/magik6k/lcad-wasm/pyside-port/fc-pyside-usage/plan.md (file state is current in your context — no need to Read it back)
Fable
Now the supporting files.
Fable
⚙ Write {"file_path": "/home/magik6k/lcad-wasm/pyside-port/fc-pyside-usage/pyside-inittab.snippet.cpp", "content": "// Registration model for statically-linked PySide/shiboken modules on wasm (no dlopen).\n// Mirrors the existing src/Main/WasmInitt…
tool result
File created successfully at: /home/magik6k/lcad-wasm/pyside-port/fc-pyside-usage/pyside-inittab.snippet.cpp (file state is current in your context — no need to Read it back)
Fable
⚙ Write {"file_path": "/home/magik6k/lcad-wasm/pyside-port/fc-pyside-usage/binding-scope.md", "content": "# Per-module binding scope notes (for the QtCore/QtGui/QtWidgets binding scopes)\n\n## QtCore — must-have, but exclude thread classes (Qt is -…
tool result
File created successfully at: /home/magik6k/lcad-wasm/pyside-port/fc-pyside-usage/binding-scope.md (file state is current in your context — no need to Read it back)
Fable
thinking
Now I'm working on a cmake patch for SetupShibokenAndPyside.cmake that restricts shim file generation to only the bound modules, and I'll frame it as guidance rather than a strict diff.
Fable
⚙ Write {"file_path": "/home/magik6k/lcad-wasm/pyside-port/fc-pyside-usage/pyside-shim-trim.cmake.patch", "content": "# Advisory patch for cMake/FreeCAD_Helpers/SetupShibokenAndPyside.cmake\n#\n# On wasm we bind only shiboken6 + PySide6.QtCore/QtGu…
tool result
File created successfully at: /home/magik6k/lcad-wasm/pyside-port/fc-pyside-usage/pyside-shim-trim.cmake.patch (file state is current in your context — no need to Read it back)
Fable
thinking
I've finished working through the investigation and have the structured output ready to share.
Fable
I've completed the investigation. All findings are grounded in the real FreeCAD tree, the wasm build config, and the asyncify Qt install.
Fable
⚙ StructuredOutput {"__unparsedToolInput": {"raw": "{\"slug\": \"fc-pyside-usage\", \"title\": \"FreeCAD's minimal PySide/shiboken binding surface\", \"verdict\": \"Minimal must-have set = shiboken6 (Shiboken) + PySide6.QtCore + PySide6.QtWidgets + PySide6.Qt…
tool result
<tool_use_error>InputValidationError: StructuredOutput was called with input that could not be parsed as JSON.
You sent (first 200 of 3652 bytes): {"slug": "fc-pyside-usage", "title": "FreeCAD's minimal PySide/shiboken binding surface", "verdict": "Minimal must-have set = shiboken6 (Shiboken) + PySide6.QtCore + PySide6.QtWidgets + PySide6.QtGui.
Common causes: unescaped backslashes in file paths (use / or \\), unescaped control characters, or truncated output. Retry with valid JSON.</tool_use_er  …[truncated]
Fable
⚙ StructuredOutput {"slug": "fc-pyside-usage", "title": "FreeCAD's minimal PySide/shiboken binding surface", "verdict": "Minimal must-have set = shiboken6 (Shiboken) + PySide6.QtCore + PySide6.QtWidgets + PySide6.QtGui; everything else is optional or provided…
tool result
Structured output provided successfully