- Replace ~2000 lines of bash with 3129 lines of type-safe Python
- Create stage-env wrapper with automatic venv management
- Implement 9 Python modules: utils, config, docker, monitoring, network, build, certs
- Add stage_env.py CLI with 10 commands using typer
- Create artifacts collection system for crash debugging
- Add base self-check tests (4/4 passed)
- Update documentation: README.md and QUICK_START.md
- Remove QEVM-specific code (80% reduction)
- Reorganize directory structure: cache/, config/, src/
- Make module fully portable and project-agnostic

Technology stack:
- typer for CLI, pydantic for validation
- docker SDK 7.0 (compose v2), httpx for async HTTP
- structlog for logging, pytest for testing
- ruff for linting, black for formatting

Phase: 14.5.1 (COMPLETED)