xint-requires-bun-runtime-separate-from-xpulse-python

xint is TypeScript-native and requires the Bun runtime (not Node.js, not Python). This is a separate runtime from X-Pulse’s Python environment and must be installed independently at /usr/local/bin/bun. The global launcher script at /usr/local/bin/xint must invoke Bun explicitly. Two runtimes is the correct tradeoff for full capability — do not attempt to port xint to Python.