Gambit, an open-source agent harness for building reliable AI agents
Hey HN! Wanted to show our open source agent harness called Gambit. If you’re not familiar, agent harnesses are sort of like an operating system for an agent... they handle tool calling, planning, context window management, and don’t require as much developer orchestration. Normally you might see an agent orchestration framework pipeline like: compute -> compute -> compute -> LLM -> compute -> compute -> LLM we invert this so with an agent harness, it’s more like: LLM -> LLM -> LLM -> compute -> LLM -> LLM -> compute -> LLM Essentially you describe each agent in either a self contained…
Gambit, an open-source agent harness for building reliable AI agents launched on January 16, 2026 with 91 votes, #383 of 14,586 launches that month and more than 95% of that year's launches.
In plain words
Gambit is an open-source agent harness that functions as an operating system for AI agents, handling tool calling, planning, and context window management. It reduces developer orchestration by prioritizing language model decisions over computation steps. Developers can define agents in markdown or TypeScript, with support for agent-to-agent communication through type-safe interfaces called decks. Each agent can be configured with different model parameters suited to its specific task.
written from the facts on this page · September 2026
From the sources
Agent harness framework for building, running, and verifying LLM workflows - getworkloop/gambit
In the maker’s words, at launch
Hey HN! Wanted to show our open source agent harness called Gambit. If you’re not familiar, agent harnesses are sort of like an operating system for an agent... they handle tool calling, planning, context window management, and don’t require as much developer orchestration. Normally you might see an agent…
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