subagent transcript

I'll start by looking at what's in both deploy directories to get a sense of the structure.

I'm comparing the two deployment versions to identify what's changed. The main difference I'm seeing is in the FreeCAD.wasm file size—the parity version is about 26MB larger than the current deploy, though both JavaScript files are identical. The timestamps also differ slightly between the two builds.

Looking at all the data packages, they appear to be the same size across both deployments, so the variation is isolated to the wasm binary and potentially the boot.py and index.html files. Let me check the actual content differences in those files.

The index.html file is identical in both versions, but boot.py differs—deploy-parity includes a webbrowser shim and CAM migration patch that deploy doesn't have. I'm also noticing a byte-level difference in FreeCAD.js at position 278149, so I need to examine the full boot.py files side by side and check the wasm files and data packages using checksums to understand what else has changed.

I'm checking the FreeCAD.js file differences between the two deployments—both are 338787 bytes but have different content at byte 278149, despite being built on the same day with different timestamps. I also need to look into what's diverging in the wasm files.

The wasm packages show a significant size discrepancy—181MB in the parity version versus 155MB in deploy—so I'm verifying the data package checksums to see if they're actually identical or if there's a real difference there.

The FreeCAD.js and FreeCAD.wasm files are a matched pair that must be deployed together, since the JavaScript glue code contains hardcoded memory addresses that correspond to the specific wasm build. The parity build has a larger wasm file, which explains why the ASM_CONSTS addresses differ between the two versions.

Now I'm checking whether the .data packages are identical by comparing their checksums.

So the key differences are just three files: the matched FreeCAD.js and FreeCAD.wasm pair (with the newer, larger wasm build), plus boot.py which has the webbrowser shim and CAM migration patch. Everything else—all the .data packages and index.html—is identical between the two. To move deploy-parity into production, I'd copy over those three files, but there's something else to consider...

The production deploy also has gzipped versions of these files (.gz) for HTTP serving, so if I update the wasm and js, I'd need to regenerate their compressed versions too. I should check if there's a serve.mjs or build script in the deploy directory that handles this, and look for any promotion or build   …

I'm noticing the deploy directory has precompressed .gz files that serve.mjs delivers when clients support gzip, but the set is incomplete—most data files are there, though the FreeCAD.js.gz appears stale from an older build, and the list cuts off mid-filename suggesting there are more missing files to account for.

The real issue is that serve.mjs prioritizes .gz files for gzip-accepting clients, so if I promote new FreeCAD.js and FreeCAD.wasm without regenerating their .gz counterparts, browsers would receive the old compressed versions instead—creating a dangerous mismatch where the promotion appears to fail or serves incompatible file pairs. The promote step must either regenerate or del  …

I need to track down the build and packaging setup for this FreeCAD WebAssembly port — specifically where the file_packager scripts are invoked to create the .data packages, how the modules list is configured, and what the index.html loader looks like. I should also check the deploy-final script to understand the full build pipeline.

I'm not finding file_packager scripts in the expected location, so I need to explore the FreeCAD source structure more carefully to understand where the build actually happens. Let me check the memory files that document the build pipeline and module setup.

I need to check the viewport memory and parity roadmap to understand how the .data packages are constructed and locate the file_packager scripts, which are likely in the build directory rather than within the FreeCAD source tree.

I'm tracing through the packaging pipeline, starting with the pack-mods.sh script at `/home/magik6k/lcad-wasm/pack-mods.sh` and the build directory at `/opt/toolchains/src/freecad-gui-build`, then I'll check the deployment process and review the parity roadmap to understand what still needs to be addressed.

I need to examine the index.html to see which .data packages are loaded and understand the boot flow, then search for specific warning strings like Tux_rc, urllib.request, "Cannot find icon", "Migrating", and Arch_rc to track down any remaining issues.

I need to examine the other shell scripts and the index.html files to understand the full deployment setup and boot sequence, particularly to verify whether the deploy-parity environment loads all the same data packages.

I'm realizing the production deployment setup: the live site at magik.net/librecad is what check-deploy.sh validates against, and the deploy/ folder is what gets synced there. The packaging scripts write directly to deploy/ with maximum compression, and the validation script performs size checks via HTTP headers plus optional SHA256 verification for full comparisons.

The key issue is that after updating the core WebAssembly and JavaScript files, the gzipped versions in deploy/ need to be regenerated since serve.mjs prefers serving the .gz files locally, while the live site likely uses either pre-gzipped assets or server-side compression. Now I need to trace through the index.html to underst  …

Now I'm tracing through the boot sequence—index.html loads boot.py via XHR during preRun and writes it to /startup-gui.py, which runApplication then executes. The boot.py script handles demo-doc creation and sets up the necessary shims. Let me search the codebase for those specific warnings to categorize them properly.

I'm examining a few specific imports and modules that need attention. First, there's Tux_rc being imported in the navigation indicator GUI—I should check what this module does and how it gets initialized. Then there's urllib.request in the Help workbench that I need to verify is properly guarded. Finally, I'm looking into the Start Workbench migration code to understand what needs to be handled there.

I'm also tracking down some missing icon resources—the BitmapFactory is throwing errors when certain Workbench.svg icons can't be found, so I need to identify which workbenches are missing their icons. There's also an Arch_rc reference in the BIM module I should investigate.

The issue is that Tux's InitGui.py conditionally imports NavigationIndicatorGui when the user parameter is enabled, but NavigationIndicatorGui tries to import Tux_rc—a compiled Qt resource file that isn't packaged—causing a ModuleNotFoundError that prevents the workbench from loading. I'm wondering whether Tux is even meant to be compiled as a workbench in WebAssembly.

Since Tux is Python-only and InitGui.py runs at startup, it's being loaded from the filesystem, which confirms the import failure. The real problem is that Tux_rc is generated during the build process from .qrc files using pyside6-rcc, but this compiled resource file isn't included in the WebAssembly package. I have a few opt  …

I found that Tux_rc.py is a generated resource file from pyside6-rcc that exists in both the build and source directories, so packaging this compiled resource file into the filesystem could resolve the missing module error, though it's quite large.

Help_rc.py is already in the source tree and gets packaged correctly, but Help.py imports urllib.request at the module level, which is likely excluded from the wasm CPython build since it pulls in heavy dependencies like http.client, ssl, and socket. This causes the Help module to fail on import.

Arch_rc.py is the 45MB resource file in the build directory that was deliberately dropped from packaging, which is why the Arch module can't find it.

  …

I'm seeing that the packaged stdlib zip is missing `urllib/request.pyc` even though it has the other urllib modules, which explains why `import urllib.request` fails in Help.py. Now I need to figure out which stdlib zip is actually being deployed in the environment.

Looking at the file sizes: Tux_rc.py is 432KB (manageable to package), Arch_rc.py is 45MB (deliberately excluded), and Help_rc.py is 836KB (already included). The real issue is that Tux_rc.py isn't being shipped, so when NavigationIndicatorGui tries to import it, the whole module fails to load — the nav indicator just won't appear, which is a minor cosmetic issue since the rest of Tux's functionality still works.

For the urllib  …

The issue is that `Help.py` imports `urllib.request` at the module level, but this module isn't available in the WebAssembly standard library. When `InitGui.py` tries to import Help during GUI initialization, it fails immediately with a ModuleNotFoundError, preventing the Help preferences page and language path from being registered. This is a boot-time failure that should be fixed if we want Help functionality to work properly.

I'm weighing three approaches: adding the full `urllib.request` chain to the packaged stdlib (which pulls in heavy dependencies like `http.client`, `ssl`, and `socket` that aren't useful in WebAssembly anyway), wrapping the imports with try-except blocks and deferri  …

The parity harness covers Draft, TechDraw, BIM, and CAM workbenches, so those are all enabled. I should spin up the deploy-parity in a headless browser and capture the actual boot log to get the definitive list of icon warnings and other issues. It'll take about 60 seconds to launch a server with Playwright, but that's the most reliable way to get accurate ground truth on what's actually missing.

Let me weigh the time investment — the core deliverable is the promotion checklist and warning classification, which I already have solid mechanistic understanding of. Running a full browser boot with the 180MB WASM load is slow and could be flaky. But it would give me the exact icon list. I'll try  …

The issue is that playwright resolves correctly from the freecad-port directory where node_modules is located, but not from scratchpad. Since ESM resolution is relative to the file location, I need to either move the harness into freecad-port or set NODE_PATH — the simplest approach is placing the harness in the freecad-port directory where playwright is actually installed.

Looking at the boot log, the migration message is a one-time operation that prints once and sets a flag—but whether it repeats depends on persistence. In this headless session there's no persisted user config, so the flag doesn't carry over. In a real browser with IDBFS, that flag would persist after the first visit and prevent the message from appearing again.

The missing MassPropertiesIcon is purely cosmetic—the command works fine without its icon. The `Tux_rc` module error is more significant: it breaks the entire Tux/InitGui initialization, which cascades to prevent both the NavigationIndicatorGui and PersistentToolbarsGui from loading. Since persistent toolbars is an actual feature tha  …

The FreeCAD.js and wasm files in deploy-parity match the build directory exactly, so I can promote from either source. The existing compressed wasm file is stale—it's the old 155MB version gzipped, but the new wasm is 181MB, so I need to regenerate the .gz file.

Now I'm checking the BIM/InitGui UI file issue and the CAM migration code, specifically looking at how the preference page registration works and what the CAMAssetMigrator's check_migration_needed function does.

Looking at the import guard on line 32 for Arch_rc, it's already marked as omitted on wasm to save memory, but I need to check if it's wrapped in a try/except block to handle cases where the resource module isn't available. Then I should examine how the preference pages at lines 601-614 and 847-851 reference these resources to see if they'll fail gracefully when Arch_rc is missing.

The real issue is that BIM's `import Arch_rc` is already wrapped in a try/except block, so it doesn't fail outright. The problem surfaces later when `loadPreferences()` tries to register a preference page using a UI file path that depends on Arch_rc's resources being loaded—since those resources aren't available, the call fails with a "UI file does not exist" error. The solution would be to add similar error handling around the `loadPreferences()` call itself.

I'm also noticing that the CAM workbench (historically called "Path") is activating successfully according to the boot log, and the boot script imports from `Path.Tool.migration.migration`, but I can't find a `Mod/Path` directory in t  …

I'm locating the migration code in the CAM module—specifically the `check_migration_needed` function at line 66 and the QMessageBox dialog at line 182, along with the webbrowser import from SanityCmd.py. Now I need to trace through the migration flow to see whether `check_migration_needed` itself triggers the dialog or if that happens elsewhere in the process.

The boot.py monkeypatch replaces `check_migration_needed` with a no-op that returns None, which short-circuits the entire migration chain and prevents the dialog from appearing. Even though the C++ fix now handles modal dialogs gracefully during async activation (logging instead of crashing), the monkeypatch still provides value by av  …

I'm noticing that the icon directory structure exists for some modules like Material, but is missing for many workbenches including Assembly, BIM, CAM, Draft, and others. The workbench initialization file attempts to set the Icon property by constructing a path to the Resources directory, though the path construction appears to be cut off mid-line.

The issue is that the freecad.data package was built from a staging tree that only included enabled modules at that time, so newer workbenches' icon SVGs aren't present in `/freecad/share/Mod/<WB>/Resources/icons/`. While some Workbench.svg files do exist in the mods packages mounted at `/freecad/Mod/<M>/...`, the InitGui files are looking in the  …

I've identified which packages need to be repacked: freecad-mods-t1 for the Tux module fix and freecad-mods-t4 for the Help and BIM fixes. The pack-mods-fixed.sh script takes an output name and module list as arguments, so I can use it to repack t1 by specifying the output filename and the Tux module.

To give precise repack commands, I should extract the actual module lists from each package's manifest to see exactly which modules belong to t1 and t4, then provide the exact invocations needed to regenerate them.

I've identified the module groupings for the two tiers: tier 1 includes Inspection, Mesh, MeshPart, Points, Robot, TemplatePyMod, Test, and Tux, while tier 4 contains BIM, CAM, and Help. Now I'm working through the repack commands using the fixed script, starting with tier 1's module list.

For the Tux module specifically, there's a complication: the build-generated Tux_rc.py file isn't in the source directory where the rsync pulls from, so I need to either copy it into src/Mod/Tux before repacking, or guard the import in NavigationIndicatorGui.py to handle its absence gracefully. The guarded import approach is more minimal and avoids adding 432KB to the package, though copying the file woul  …

Now I'm organizing everything into the structured output—putting the prioritized checklist into the fix plan, covering the root cause around the promote-delta and warning mechanisms, listing the exact file paths that need changes, detailing which .data packages require rebuilding, and flagging the key risks like the gzip pitfall along with verification steps.