Holt

What Holt is

Holt is an open-source personal agent OS that runs on a user’s machine and keeps work memory readable and editable. Conversations and distilled facts are stored locally by folder. For recall, it can use a local Ollama embedding model or fall back to keyword matching; the memory can also be viewed as a cross-linked wiki or interactive knowledge graph. Holt supports Claude, OpenAI, Gemini, Kimi, Grok, and local models, with conversation context retained when switching between them. It provides an MCP server for Claude Code, Cursor, and Codex, plus ambient memory hooks for Claude Code. Thirteen skills are included, with more available through a community registry. Tasks can run once, use native operating-system timers, or be saved as named routines. Holt can also run as a Telegram bot for phone messaging and scheduled notifications, and can draft writing based on an interview or samples of a user’s style. It is free and MIT licensed. The installation guide lists macOS 13+, Windows 10 build 1809+, Ubuntu 20.04+, and Debian 10+ as supported minimums; npm installation requires Node.js 20 or newer and at least 4 GB RAM.