Claw Web arcade integration — reproduction instructions

Engine source: https://github.com/arthurboss/claw-web
Commit: e723d3d48b5ba2cc723751209954cfc46c82d202
Toolchain: Emscripten SDK 6.0.1, CMake 4.4.3, zip, Python 3.

From an empty workspace, create tools/ and research/browser-port-sources/.
Copy package-claw-runtime.py and claw-chunks.js from arcade-integration/ in
corresponding-source.tar.gz into tools/. Clone the engine repository into
research/browser-port-sources/claw-web-src and check out the commit above.
Install Emscripten SDK 6.0.1 using the official emsdk installer.

In claw-web-src, activate the SDK environment, then run:
  cd Build_Release/ASSETS
  zip -q -r ../ASSETS.ZIP .
  cd ../..
  emcmake cmake -S . -B build -DEmscripten=1 -DCMAKE_POLICY_VERSION_MINIMUM=3.5
  cmake --build build -j 4

From the workspace root:
  python3 tools/package-claw-runtime.py

Output is public/ports/claw. The archive preserves the pinned source and
dependency notices; only the generated Visual Studio .sdf database is omitted.
Packaging externalizes shell scripts and event handlers for the arcade CSP,
disables service worker/installation prompts, and replaces binary caching with
the authenticated chunk loader. No CLAW.REZ is copied.

Serve the output under /ports/claw/ on the same origin as the arcade.
The document CSP needs script-src 'self' 'wasm-unsafe-eval', not unsafe-eval
or unsafe-inline. Engine parts are 8 MiB maximum. Original data uses local
IndexedDB. The engine is a reimplementation, not a verified matching decompile.