
Harness Starter Kit
Repo guardrails for reliable AI coding agents
What it does
Harness Starter Kit helps teams turn fragile AI coding prompts into durable repository rules: AGENTS.md, drift checks, failure memory, adoption reports, and stack profiles for safer agent collaboration.
Does the same job
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HarnessRouter Community Edition21d ago · harnessrouter.ai · ▲392Open-source unified interface for agent harnesses
- AHAgent-harness-kit scaffolding for multi-agent workflowsMay 2026 · ahk.cardor.dev · ▲82
HarnessRouterJul 2026 · harnessrouter.ai · ▲238Bring the world's best AI agents into your app, with one API

- ZYZot – Yet another coding agent harnessMay 2026 · zot.sh · ▲107
- ACAI CAD HarnessMay 2026 · fusion.adam.new · ▲101
Hi HN, I'm Zach, one of the co-founders of Adam (https://adam.new). We've been on HN twice before with text-to-CAD/3D experiments [1][2]. The honest takeaway from those threads: prompt-to-3D model web apps are fun, but serious mechanical engineers don't want a black box that spits out an STL. They want help inside the CAD tool they already use, with full visibility and control over the feature tree. So we built that. Adam is now a harness that integrates directly with your CAD. It reads your parts, understands the existing feature tree, and edits it for you agentically. We are…
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Hey HN, Henry here from Cactus. We open-sourced Needle, a 26M parameter function-calling (tool use) model. It runs at 6000 tok/s prefill and 1200 tok/s decode on consumer devices. We were always frustrated by the little effort made towards building agentic models that run on budget phones, so we conducted investigations that led to an observation: agentic experiences are built upon tool calling, and massive models are overkill for it. Tool calling is fundamentally retrieval-and-assembly (match query to tool name, extract argument values, emit JSON), not reasoning. Cross-attention…
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