py.sx is an SX-to-Python translator written in SX. Running it on the
Python evaluator against the spec files produces byte-for-byte identical
output to the hand-written bootstrap_py.py (128/128 defines match,
1490 lines, 88955 bytes).
The bootstrapper bootstraps itself: G0 (Python) == G1 (SX).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>