[ThinkUP-Vers]

Problem

find_command tries Windows-only names first ("npx.cmd", "npm.cmd"). Under WSL, the Windows binaries exposed through /mnt/c PATH interop win over the Linux ones, and Python then fails to exec a batch file:

OSError: [Errno 8] Exec format error: '/mnt/c/Program Files/nodejs/npx.cmd'

This breaks make demo for every WSL user — which is notable, since WSL is a common path for Windows users who lack make.

Fix

Filter .cmd/.exe candidates when not on Windows. This matches the platform check already used in tools/video/remotion_caption_burn.py:329, so it follows an existing convention rather than introducing a new one. Windows behaviour is unchanged. One change point fixes node, npm and npx together.

Testing

Ubuntu 26.04 under WSL2, Node v22.22.1, Python 3.14.4. Before: fails at npx resolution. After: npx -> /usr/bin/npx, npm -> /usr/bin/npm, and render_demo.py renders all three demos (1920x1080, 30 fps) with the Windows PATH intact and no workaround.

🤖 Generated with Claude Code

[calesthio]

Thank you for the WSL command-resolution fix. The two-line filter cleanly integrates with current main and matches the existing native-platform convention. An independent mocked-PATH regression passed for Linux, macOS and Windows: non-Windows selects native npx without trying .cmd/.exe; Windows retains the original candidate order. I reviewed the full render_demo command-discovery call sites. No demo dependencies were installed or media rendered.