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Harness is standalone desktop apps that talk to any AI agent through localhost APIs. Not a plugin, not a platform. Just apps on your
machine. The agent reads your kanban board, respects your "don't do" list, sends you alerts, leaves async questions, and checks how much time it has left. Works with Claude Code, Codex, Cursor, or anything that can make HTTP requests. Drop a markdown file in your project and the agent knows the apps exist. No accounts, no cloud, no tracking.
HarnessTiny apps for agents and humans
Matthew Kenneyleft a comment
Hey! I built Harness because I kept running into the same problem: I'm working with an AI agent, it finishes a task, and I have no idea what it did or what it needs from me. The terminal scrolls past and context is lost. I wanted simple, physical tools on my desktop. A board I can glance at, a sound when something breaks, a place the agent can leave me a note. Not another tab, not another SaaS...
HarnessTiny apps for agents and humans