bernstein is an open-source python orchestrator for cli coding agents. it decomposes a goal into tasks, picks a model and a cli agent (claude code, codex, gemini cli, aider, plus 33 more adapters), isolates each task in a git worktree, runs lint, type-check, tests, and security scans, and merges only the worktrees that pass. the orchestrator itself is deterministic python, not an llm, so scheduling and routing spend zero model tokens. state lives in .sdd/ on disk; there is no server to provision. apache 2.0, python 3.12+, install with pipx install bernstein. source: https://github.com/sipyourdrink-ltd/bernstein.
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