BRIAN

A self-hosted agent runtime. Model, loop, tools, memory, permissions.

pip-installable as brian-core 2.0.0rc24. The command is brian.

macOS / Linux

curl -fsSL https://heybrian.ai/install | bash

cmd

powershell -c "irm https://heybrian.ai/install.ps1 | iex"

PowerShell

irm https://heybrian.ai/install.ps1 | iex

First brian in a terminal asks for a provider, credentials, and model, seeds ~/.brian/SOUL.md if missing, live-pings the provider, then asks what to call you. brian doctor diagnoses the home without starting a session. Pipe install stays non-interactive. Bring your own LLM key. The wheel is code — memory and sessions start empty, in ~/.brian.

What you get

BrianClient talks to the HTTP API. It is not the Agent SDK.

from brian_core.sdk import run, stream

print(run("list python files"))
for event in stream("list python files"):
    ...

Twelve providers (Anthropic, OpenAI, Gemini, Bedrock, OpenRouter, DeepSeek, Mistral, xAI, Ollama, LM Studio, plus generic gateways). Seventy tools: shell, files, browser, desktop, web, media, MCP, subagents, durable runs that survive a crash.

From this repo

Git, Python 3.11+, uv. Code lives under src/brian_core.

git clone https://github.com/mrgizmo212/Brian.git
cd Brian
uv sync
uv run brian --help
uv run brian
uv run brian "list python files"

Optional extras: providers, hosted.

Modes

uv run brian                         # TUI
uv run brian --repl                  # CLI prompt
uv run brian "do this"               # one shot
uv run brian --continue              # last session
uv run brian --resume <session-id>
uv run brian --fork-session <id>
uv run brian --tui
uv run brian --api
uv run brian --scheduler
uv run brian --heartbeat-only
uv run brian --learning-graph
uv run brian --version
uv run brian doctor

One mode per invocation. --api requires API_SERVER_KEY.

HTTP API

uv run brian --api
curl -fsS http://127.0.0.1:8000/health
curl -fsS http://127.0.0.1:8000/v1/chat/completions \
  -H "Authorization: Bearer $API_SERVER_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"agent","messages":[{"role":"user","content":"Say hello."}]}'

Self-host with Docker: deploy/README.md.

Config

Settings live in ~/.brian/.env (or BRIAN_ENV_FILE). Names are in env.example. Required: PROVIDER, MODEL, and that provider's key.

Override the home directory with BRIAN_HOME.

Docs

• docs/CAPABILITIES.md — what it can do (Memory Trio: flush-before-compact, stub summary, skill proposals; Engine parity 2026-09-20: real token counting, file-tool fence, default step cap, one durable path, surfaced transcript failures, CI)
• docs/brian-operator.md — SOUL, skills, MCP, session save, compaction flags
• AGENTS.md — working in this repo (module index, Memory Trio table, Engine parity table)
• docs/core-v2/package-migration.md — package, CLI, and install reference

License

MIT License. Copyright 2026 TTG AI LLC. See LICENSE and NOTICE.