{"repo":"vitaliikapliuk/modelharness","free":true,"listed":false,"github":"https://github.com/vitaliikapliuk/modelharness","clone":"git clone https://github.com/vitaliikapliuk/modelharness.git","description":"Make every model cheaper or better. Zero-config behavioral harness for Claude Code, with a reproducible 408-run benchmark","language":"Python","stars":48,"topics":["agent-harness","benchmark","claude-code","claude-code-plugin","fable","haiku","llm-harness","opus","sonnet"],"license":"MIT","category":"mcp-servers","readme_excerpt":"modelharness Make every model cheaper or better. Measured on four Claude models — none got worse. What it actually is: a zero-config Claude Code plugin. On every session start it injects a ≈910-token behavioral core — six working practices distilled from how Fable 5 was trained to operate — plus three on-demand skills and a fresh-context verifier agent. No commands to learn; the model just starts working differently: --- --- ✅ Grounded progress — only claims backed by a tool result; \"tests fail\" said plainly ⚡ Act, don't overplan — enough information means act, not narrate options 🎯 Autonomy calibration — decides minor things itself, asks only on scope or destructive actions 🔍 Self-verification loops — a checkable definition of done, real checks on a cadence, a fresh-context verifier before \"done\" 🔀 Delegation triggers — explicit rules for when to fan work out to subagents 📝 Cross-session memory — writes lessons and plans to files, so the next session can pick up the work What the 17 tasks test --- --- --- 🐛 Bug hunts 4 tasks · 96 runs Find and fix planted defects: TTL cache, CSV quoting, rate limiter, date rollover ✨ Features from spec 4 tasks · 96 runs Build to a written spec: retry backoff, config merging, cursor pagination, slugify ♻️ Refactors 2 tasks · 48 runs Restructure code with zero behavior change, verified structurally 🧠 Long-horizon builds 2 tasks · 48 runs Multi-stage pipelines where later steps depend on earlier decisions 🧩 Spec-dense traps 3 tasks · 72 ","default_branch":null,"files":null,"tree":[],"storefront":"/r/vitaliikapliuk","claimed":false,"request_supported":{"post":"https://gitbuyer.com/r/vitaliikapliuk/modelharness/request-supported","requests":0},"note":"indexed from public GitHub; nothing is for sale on this page. Clone it from GitHub. Paid listings live at /search."}