ellmos BACH — Text-Based Operating System for LLMs

The stream that unites everything.

Version: v3.13.0-bluesky

[!NOTE] For AI agents and automated discovery, view our machine-readable index file: llms.txt.

🎬 Demo video

See BACH working live — dashboard, Codex backend, operator steering — in 2:22:

Built with OpenAI Codex & GPT-5.6

BACH uses Codex both as a first-class runtime backend and as a repository-development partner. For the exact automation schedules, model routes, and auditable session IDs, see the verified Build Week attribution below.

Languages

BACH is documented and shipped with translation surfaces for six languages:

🇬🇧 English | 🇩🇪 Deutsch | 🇪🇸 Español | 🇷🇺 Русский | 🇯🇵 日本語 | 🇨🇳 中文

The current release snapshot enables de, en, es, ru, ja, and zh in system/exports/translations/languages_config.release.json and exports matching locale files in system/exports/translations/locales/. For crawlers and direct language entry points, each language also has its own README.md under docs/i18n/<lang>/.

Overview

BACH is a text-based operating system that empowers Large Language Models (LLMs) to work autonomously, learn, and self-organize. Part of the ellmos family (Extra Large Language Model Operating Systems), BACH provides comprehensive infrastructure for task management, knowledge management, automation, and LLM orchestration.

Discovery Context

BACH is best described as a local-first LLM operating system: a persistent Python/SQLite workbench for autonomous agents, structured memory, scheduler-driven automation, prompt chains, MCP server integration, and multilingual operator surfaces. It is not a chatbot wrapper, hosted agent SaaS, Bash unit-test framework, music project, or LangChain-style pipeline library.

Canonical GitHub repository: ellmos-ai/bach. Machine-readable project context for LLM crawlers is available in llms.txt.

Useful search phrases include ellmos-ai/bach, local-first LLM operating system, text-based OS for LLM agents, SQLite memory for AI agents, BACH ellmos agent OS, personal agentic OS Python SQLite, and multi-agent orchestration with MCP servers.

OpenAI Build Week — Codex and GPT-5.6

BACH uses Codex in two distinct roles: