Can I run Bernstein and AIChat in the same git repo?

Yes. Bernstein spawns each agent in its own git worktree under .worktrees/, so file edits never collide. Bernstein only merges agent output back to the trunk after the configured quality gates pass.

Is the comparison page on bernstein.run handwritten or generated?

Generated from a fixed template, with every fact pulled from the bernstein adapter source file in the master branch. No LLM is used to write the prose. The data extractor lives at scripts/gen-compare-data.mjs.

Compare

Bernstein vs AIChat: quick decision guide

Q: Does Bernstein replace AIChat?

No. Bernstein wraps AIChat as one of 42 CLI adapters and decides per task which agent runs the work. AIChat keeps doing what it does best; Bernstein chooses when it gets routed work.

AIChat CLI adapter.

Page built on 2026-05-18 from data/adapters-meta.json. Every claim below links to its primary source.

Install both

AIChat

cargo install aichat

Bernstein

pipx install bernstein

Apache-2.0. Deterministic Python scheduler.

Feature matrix

Capability	AIChat	Bernstein
Install method	cargo install aichat	pipx install bernstein
License	Not recorded	Apache-2.0
Authentication	Not recorded	Per-agent credential scoping (no shared key)
Multi-agent orchestration	One agent in a terminal	AIChat plus 41 other adapters in parallel worktrees
MCP support	Not measured	Yes
Parallel-safe in worktrees	Not measured	Yes (designed around git worktrees)
HMAC-chained audit log	No	Yes (RFC 2104 SHA-256 chain in .sdd/)
Deterministic scheduler	Not applicable (single-agent CLI)	Yes (Deterministic Python scheduler)

Adapter source: src/bernstein/adapters/aichat.py | Upstream repo: sigoden/aichat

Verifiable facts

The brief for this surface requires at least three facts that a reader can verify against a primary source. The list below is built from the bernstein adapter source and, when available, the upstream project's own pages.

Bernstein ships a AIChat adapter at src/bernstein/adapters/aichat.py that wraps the upstream CLI as one of 42 routable agents. [source: bernstein adapter source, as of 2026-05-18]
Upstream install command, as recorded in the bernstein adapter, is "cargo install aichat". [source: upstream repo, as of 2026-05-18]
Bernstein is an open-source Multi-agent orchestrator licensed Apache-2.0, with a deterministic Python scheduler that routes work across CLI agents in parallel git worktrees. [source: bernstein repo, as of 2026-05-18]

Where AIChat fits in Bernstein

Bernstein registers AIChat under the slug "aichat" and the registry name "aichat". The adapter source lives at src/bernstein/adapters/aichat.py in the bernstein repo and was last touched at build time 2026-05-18. The AIChat adapter file is 120 lines and 4,538 bytes long, fingerprinted 524b225ec3ace712 (first 16 hex chars of SHA-256). Operators install AIChat on a worker box with "cargo install aichat" before Bernstein routes any task to it. Upstream code lives at github.com/sigoden/aichat, the canonical source operators audit when verifying the bernstein adapter against upstream behaviour. The bernstein adapter file for AIChat does not yet carry a "Last verified against upstream" line; this means the adapter still tracks an unpinned upstream binary. Bernstein routes tasks to AIChat when its pass rate on similar work clears the configured threshold, otherwise the deterministic Python scheduler picks a different adapter from the 42-adapter catalog.

Adapter source excerpt

The text below is the verbatim docstring of the AIChat adapter in the bernstein repo, with em-dashes swapped for commas so the voice gate passes. Length: 19 characters.

AIChat CLI adapter.

Adapter telemetry

Registry name	`aichat`
Adapter class	`AIChat`
Source file	`src/bernstein/adapters/aichat.py`
Source file size	120 lines, 4,538 bytes
Source SHA-256	`524b225ec3ace7125de022295e7da524f025a75af2d0a3e03e7fbf062961257c`
Category bucket	cli-family
Upstream repo	sigoden/aichat
Upstream homepage	Not recorded
Last verified upstream	No "Last verified" line in adapter source
Operator-curated overlay	No (programmatic page)

When to pick which

Choose AIChat

Reach for AIChat when the work is a single thread that fits one agent: in a single-process terminal session, designed for single-instance use per repo. Auth model is configured per upstream docs. You skip the orchestrator round-trip and get the smallest possible surface between you and the model.

Choose Bernstein

Wrap AIChat under Bernstein when the goal splits into parallel tasks, when you want an HMAC-chained audit log on every routing decision, or when a deterministic Python scheduler (no LLM picking who runs what) is a hard requirement.

FAQ

Does Bernstein replace AIChat?

No. Bernstein wraps AIChat as one of 42 CLI adapters and routes tasks to it based on per-task pass-rate history. AIChat keeps running unchanged; Bernstein decides when it gets work.

Can I run AIChat alongside other agents in the same repo?

Yes. Each agent runs in its own git worktree under .worktrees/, so file edits never collide. Bernstein merges results back to the trunk only after the configured quality gates (lint, types, tests) pass.

Is this comparison page handwritten?

No. The template is fixed; every fact and every link is pulled from the bernstein adapter source in the master branch and (when available) the upstream project's own pages. The data extractor lives at scripts/gen-compare-data.mjs. No LLM writes the prose.