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Harness Improvement Loop

Category: General  ·  Sub-category: operations  ·  Last updated:
ai:agenttype:debug
Agentic harness diagnostic + improvement loop. Probes the framework with real model runs, uses the rax-diagnose CLI to root-cause failures from structured trace data, ships ONE coordinated architectural fix, verifies via before/after diff, commits with empirical evidence. Use at the start of any harness improvement session — replaces ad-hoc grep + log-spelunking with a deterministic feedback loop.

What this skill does

Harness Improvement Loop is a community-contributed Claude Code skill in the operations sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/harness-improvement-loop/ and loads when your prompt matches the skill's trigger.

Who uses this skill

The Harness Improvement Loop Claude Code skill is built for Claude Code users and developers across all disciplines looking for general-purpose AI assistance. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 70,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/harness-improvement-loop
curl -L https://claudskills.com/skills/harness-improvement-loop/SKILL.md \
  -o ~/.claude/skills/harness-improvement-loop/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/harness-improvement-loop/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/harness-improvement-loop/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\harness-improvement-loop\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA
ClaudSkills. (2026). Harness Improvement Loop [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/harness-improvement-loop/
BibTeX
@misc{harness-improvement-loop-2026,
  author    = {ClaudSkills},
  title     = {Harness Improvement Loop [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/harness-improvement-loop/}
}

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Part of ClaudSkills — the open registry for Claude Skills & Claude Code Skills.  ·  What's New  ·  Install guide  ·  About  ·  llms.txt

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