Bernstein (chernistry) MCP Server

website docs install first run glossary limitations name policy sponsor. It runs locally over stdio via the published package.

People connecting coding agent tools to Claude, Cursor, VS Code, or another MCP client. The project is written in Python.

NO LONGER MAINTAINED

LAST COMMIT 2026-08-25 · ★ 981 · VERIFIED 2026-08-25

Apache-2.0 · Python servers · how we verify → /methodology

01 · Install Bernstein (chernistry)

before you install - you'll need

BERNSTEIN_AUDIT

Environment variables documented in the project's README - it lists which are required and which have defaults.

Claude Code

claude mcp add chernistry-bernstein -- uvx bernstein

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "chernistry-bernstein": {
      "command": "uvx",
      "args": [
        "bernstein"
      ]
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions

license Apache-2.0 - declared in the repository

pypi package bernstein - check the name against the project README before installing (PyPI has no namespace ownership)

registry namespace io.github.chernistry is GitHub-verified and matches the repo owner

03 · What Bernstein (chernistry) can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

Latest releases

v3.17.2 · 2026-08-24

A patch release about proof: what a run recorded, and whether you can still check it afterwards. · Receipts you can re-derive · A gate verdict is three-valued, but receipts stored only the outcome, so an auditor…

v3.17.1 · 2026-08-22

A patch release about one thing: a container run that starts from an issue number and is still alive an hour later. · Agents stopped dying · The heartbeat was refreshed by a shell loop pasted into the agent's own…

v3.17.0 · 2026-08-21

This release began as an arXiv preprint. The evaluation section kept turning into · a bug report, so we shipped the bug report first. · The task graph dropped work · A failed or cancelled task now reaches dependents…

04 · Who maintains Bernstein (chernistry)

bernstein is maintained by chernistry. It's the only MCP server we track from this author; the repo dates to Mar 2026.

05 · Facts

repository: github.com/chernistry/bernstein
category: coding agent - dead as of 2026-08-25.
release cadence: 10+ releases in the last 90 days (latest 2026-08-24)
registry: io.github.chernistry/bernstein (deprecated, first published 2026-04-07)
packages: pypi:bernstein

06 · Bernstein (chernistry) FAQ

What is Bernstein (chernistry)?

website docs install first run glossary limitations name policy sponsor. It runs locally over stdio via the published package.

Is Bernstein (chernistry) still maintained?

Its last commit was 2026-08-25 (as of 2026-08-25) - we classify it as dead.

How do I install Bernstein (chernistry)?

Run `uvx bernstein`. The README documents one environment variable (BERNSTEIN_AUDIT) to set first. You can also paste the ready-made client config above.

Does Bernstein (chernistry) run locally?

Yes - it's a stdio server: it runs on your machine (via uvx) with your user's permissions. Your data stays local unless the server itself calls external APIs.

07 · Alternatives to Bernstein (chernistry)

Alternatives to Bernstein (chernistry)

Maintained coding agent servers if Bernstein (chernistry) isn't the fit.

Pairs well with

Servers that cover what Bernstein (chernistry) doesn't - only shown when the pairing reason fits the companion.