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Lisa Improve Harness

Category: Engineering  ·  Sub-category: testing  ·  Last updated:
Investigate ONE failed or expensive factory trajectory and prove whether a fix helped. Records the job contract, observes the baseline, locates the earliest failed handoff, classifies the gap as exactly one of context | capability | domain-ownership | authority | proof | feedback-delivery | worker-limitation, makes the smallest owning intervention at the authoritative owner (larger changes become a proposed-intervention ticket and the loop stops), verifies at both layers (native gates plus the operational journey), then reruns the same job class in a fresh session and isolated worktree behind a relevance gate — a rerun that never retrieved or invoked the intervention yields no-evidence-for-intervention, never retain. Terminates by posting a fingerprinted result record on the originating work item with decision retain, revise, remove, or test-without. Headless-safe, idempotent per trajectory, single-trajectory bounded claims only.
Security AStatic scan found no risk patternsHow grading works ›

From the source SKILL.md

Run ONE bounded baseline → intervention → fresh-rerun loop on a single failed or expensive trajectory. Trajectory: $ARGUMENTS

What this skill does

Lisa Improve Harness is a community-contributed Claude Code skill in the testing sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/lisa-improve-harness/ and loads when your prompt matches the skill's trigger.

Who uses this skill

The Lisa Improve Harness Claude Code skill is built for software engineers, backend developers, full-stack teams, and technical leads building and maintaining production systems. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 158,000+ 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/lisa-improve-harness
curl -L https://claudskills.com/skills/lisa-improve-harness/SKILL.md \
  -o ~/.claude/skills/lisa-improve-harness/SKILL.md

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

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

Telegram

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

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

Frequently asked questions

How do I install the Lisa Improve Harness Claude Code skill?
Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/lisa-improve-harness/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.
What does the Lisa Improve Harness skill do?
Investigate ONE failed or expensive factory trajectory and prove whether a fix helped. Records the job contract, observes the baseline, locates the earliest failed handoff, classifies the gap as exactly one of context | capability | domain-ownership | authority | proof | feedback-delivery | worker-limitation, makes the smallest owning intervention at the authoritative owner (larger changes become a proposed-intervention ticket and the loop stops), verifies at both layers (native gates plus the operational journey), then reruns the same job class in a fresh session and isolated worktree behind a relevance gate — a rerun that never retrieved or invoked the intervention yields no-evidence-for-intervention, never retain. Terminates by posting a fingerprinted result record on the originating work item with decision retain, revise, remove, or test-without. Headless-safe, idempotent per trajectory, single-trajectory bounded claims only.
Is this skill free to install?
Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.
When should I use the Lisa Improve Harness skill?
Use Lisa Improve Harness when your Claude Code task falls under the Engineering category — specifically in the testing area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Lisa Improve Harness" or describe the task and let Claude pick). Browse related skills at /category/engineering/.
What is a Claude Code skill and how does the Lisa Improve Harness skill fit in?
A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Lisa Improve Harness is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Engineering category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Cite this skill

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

APA
CodySwannGT. (2026). Lisa Improve Harness [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/lisa-improve-harness/
BibTeX
@misc{lisa-improve-harness-2026,
  author    = {CodySwannGT},
  title     = {Lisa Improve Harness [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/lisa-improve-harness/}
}

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Grade A · scanned 2026-07-23 — free static scan against the OWASP Agentic Skills Top 10.

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