The script auto-detected PYTHON_CMD but then hardcoded `python3` for the
JSON write (exit 127 on Windows where only `py` exists), and passed a Git
Bash POSIX path (/d/...) to native Python (FileNotFoundError). Fixes:
- use "$PYTHON_CMD" instead of hardcoded python3
- convert IDENTITY_PATH via `cygpath -m` for the interpreter (no-op elsewhere)
Verified on GURU-5070: identity.json migrated correctly (py, windows/amd64,
localhost Ollama, qwen3:8b).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
- Auto-detects Python command, platform, architecture
- Probes Ollama (local vs remote)
- Sets prose_model based on machine (qwen3:8b for GURU-5070, else qwen3:14b)
- Tested on Mikes-MacBook-Air: all fields populated correctly
Ready for coord rollout to all machines.
