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.

Make every model cheaper or better. Measured on four Claude models, none got worse. What it actually is: a zero-config Claude Code plugin.
Use when deciding whether to spawn subagents — explicit rules for when delegation pays off and when direct work is faster. Opus…
Use when recording lessons learned in a project, or when a project contains lessons/ or MEMORY.md — file-based memory format and…
Use when a task spans more than a few steps or files — establishes a checkable definition of done, a verification cadence, and…
Fresh-context verifier. Use PROACTIVELY after completing any multi-step task - verifies work against its specification by running…
Extract a full task specification up front (goal, constraints, definition of done), then execute — the primary documented lever…
Write this session's lessons into the project's lessons/ directory using the memory-discipline format.
Spawn a fresh-context verifier subagent to check completed work against its specification before trusting it.
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