Get your environment ready for everything that follows.
Start this phase on GitHub
Prerequisites: None. You need Git and Python 3.11 or newer to begin. Other tools are installed only when your route needs them.
First lesson: Dev Environment
From the repository root, run the route-aware preflight:
bash
python3 phases/00-setup-and-tooling/01-dev-environment/code/verify.py --route beginnerKeep the command, repository-root working directory, exit code, required check
results, and the printed Next: command. Optional misses are not failures.
Next action: Fix every required failure, rerun until the command exits 0, then continue to Git and Collaboration.
Browse the full Phase 0 lesson list or the cross-phase roadmap.