bernstein

Overview

Bernstein is a deterministic Python scheduler that orchestrates multiple CLI coding agents (Claude Code, Codex, Gemini CLI, etc.) in parallel git worktrees. It provides HMAC-SHA256 audit chains, signed agent cards, per-artifact lineage, and air-gap deploy capabilities. The scheduler uses plain Python rather than LLMs for task coordination, ensuring determinism and reproducibility while maintaining security for regulated environments.

Try asking AI

After installing, here are 5 things you can ask your AI assistant:

• idea-to-pr

  Runs a workflow from research to PR implementation

  Try:Run the idea-to-pr workflow for adding JWT auth
• refactor-with-tests

  Workflow for finding, proposing, and implementing refactoring

  Try:Start refactor-with-tests for the authentication module
• security-review

  Workflow for scanning, triaging, and patching security issues

  Try:Run security-review on the payment processing code
• doc-update

  Workflow for auditing and updating documentation

  Try:Update documentation for the API endpoints
• dependency-bump

  Workflow for bumping and testing dependencies

  Try:Bump the React version and test the changes
• hot-fix

  Workflow for reproducing and fixing critical issues

  Try:Apply hot-fix for the production bug in checkout

Note: Tool names inferred from workflow examples in the documentation, though these appear to be workflow configurations rather than direct MCP tools

Comparable tools

Installation

pipx install bernstein
bernstein init
bernstein run -g "fix the failing test in tests/test_foo.py"

{
  "mcpServers": {
    "bernstein": {
      "command": "bernstein",
      "args": ["mcp"]
    }
  }
}

curl -fsSL https://bernstein.run/install.sh | sh  # macOS/Linux
irm https://bernstein.run/install.ps1 | iex     # Windows
pip install bernstein                           # pip
uv tool install bernstein                       # uv
brew tap chernistry/tap && brew install bernstein # Homebrew

FAQ

How is Bernstein different from other agent orchestrators?

Bernstein uses deterministic Python scheduling instead of LLM coordination, provides HMAC-chained audit logs, signed agent cards, per-artifact lineage, and is designed for on-prem deployment with air-gap capability - features lacking in most other orchestrators.

Does Bernstein support multiple AI providers?

Yes, Bernstein supports 44 CLI agent adapters including Claude Code, Codex, Gemini CLI, and 40+ others. It can wrap any CLI coding tool rather than being limited to specific AI providers.

On Hacker News

Recent discussion from the developer community.

• Bernstein: Deterministic orchestrator for 40 CLI AI agents▲ 3
  Story by nateb2022 · 2026-05-08

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