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Agent skill

Repo Harness Test

by Ancienttwo in Ancienttwo/repo-harness

Write or select tests and real fixtures in the repo-harness source checkout.

MITAuto-check passed

Install Repo Harness Test

skills CLI
$ npx skills add Ancienttwo/repo-harness --skill repo-harness-test -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install Ancienttwo/repo-harness repo-harness-test --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/Ancienttwo/repo-harness.git skills-src && mkdir -p .claude/skills && cp -r skills-src/assets/skills/repo-harness-test .claude/skills/repo-harness-test && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
repo-harness-test
GitHub stars
434
Token cost
~234 tokens
SKILL.md length
81 words
Files
5 (incl. references)
Skills in repo
12
Repo updated
First seen
Licence
MIT

At a glance

Write or select tests and real fixtures in the repo-harness source checkout.

  • SKILL.md covers Mode Selection and Boundaries
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Repo Harness Test is an agent skill from Ancienttwo/repo-harness. Write or select tests and real fixtures in the repo-harness source checkout. Exclude downstream projects, diagnosis, and acceptance decisions.

Its SKILL.md is about 230 tokens, which your agent loads only when the skill is triggered. The skill folder holds 5 other files, including reference files (for example `references/authoring.md`, `references/refactor-evidence.md` and `references/running.md`).

The repository describes itself as: File-backed workflow harness for reliable Claude Code and Codex sessions. The licence is MIT.

Example prompts

  • “/repo-harness-test”

What it can do on your machine

Read from SKILL.md and the folder at commit 461e054. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Repo Harness Test loads about 234 tokens when it runs, and up to ~4.3k if it reads all its reference files. Until then it costs about 40 tokens; SKILL.md has 81 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~40
When it runs · the whole SKILL.md, loaded when a task matches
~234
With references · SKILL.md plus every file in references/, read only if the agent opens them
~4.3k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from Ancienttwo/repo-harness at commit 461e054, republished under its MIT licence (© Ancienttwo). 81 words, ~234 tokens.

Download SKILL.mdSave it as .claude/skills/repo-harness-test/SKILL.md (or your agent's skills folder). This skill also uses 4 other files; get the full folder from GitHub.
name
repo-harness-test
description
Write or select tests and real fixtures in the repo-harness source checkout. Exclude downstream projects, diagnosis, and acceptance decisions.
when_to_use
repo-harness-test

repo-harness-test

Worker entrypoint. Confirm this is the repo-harness source checkout.

Mode Selection

  • Extend tests and select real fixtures: references/authoring.md.
  • Select affected tests and inspect runtime cost: references/running.md.
  • Move or remove tests without losing coverage: references/refactor-evidence.md.
  • Assign checks to CI lanes: references/verification-plan.md.

Boundaries

Follow the target repo's test instructions. Preserve assertions unless behavior changes require them. Do not fabricate pre-fix logs or acceptance results. Report command, result, revision, environment and incomplete coverage. Diagnosis belongs to hunt; acceptance decisions belong to the Bot.

© Ancienttwo, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 4 other files (references) in assets/skills/repo-harness-test of Ancienttwo/repo-harness.

  • SKILL.md
  • references/authoring.md
  • references/refactor-evidence.md
  • references/running.md
  • references/verification-plan.md

Open the folder on GitHubat commit 461e054

Compare with similar skills

Repo Harness Test next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Repo Harness Test compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Repo Harness Test this skillAncienttwo/repo-harness434—~234Automated safety check: PassMIT
Select Namethedaviddias/Front-End-Checklist74k—~451Automated safety check: PassMIT
Engine Selectionsickn33/agentic-awesome-skills47k1 repos~1.2kAutomated safety check: PassMIT
OpenLogi Device Fixture ContributionAprilNEA/OpenLogi23k—~1.2kAutomated safety check: PassApache-2.0
Technology Selectiondotnet/skills5.6k1 repos~2.1kAutomated safety check: PassMIT
Accounting Software Selectionsickn33/agentic-awesome-skills47k1 repos~7.4kAutomated safety check: PassMIT

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More from Ancienttwo/repo-harness

All 12 skills in this repo

  • Development Scheduler

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    434 GitHub stars~703 tokensUpdated today
    Auto-check passed

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  • Repo Harness Chatgpt

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    434 GitHub stars~587 tokensUpdated today
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  • Repo Harness Setup

    Ancienttwo/repo-harness

    Canonical rule owner for installing, migrating, upgrading, repairing, scaffolding, and capability-configuring the repo-harness workflow in a repository.

    434 GitHub stars~474 tokensUpdated today
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  • Repo Harness Ship

    Ancienttwo/repo-harness

    Close out verified harness work only when the user explicitly asks to commit, push, open a PR, merge, or clean merged worktrees.

    434 GitHub stars~251 tokensUpdated today
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  • Repo Harness

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    Eval-only bounded frontier stress test for complex repo-harness planning; never installed as a managed Skill.

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Questions about Repo Harness Test

What does Repo Harness Test do?

Write or select tests and real fixtures in the repo-harness source checkout. Repo Harness Test is an agent skill from Ancienttwo/repo-harness. Write or select tests and real fixtures in the repo-harness source checkout.

How do I install Repo Harness Test in Claude Code?

Run `npx skills add Ancienttwo/repo-harness --skill repo-harness-test -a claude-code`. Or copy the skill folder (assets/skills/repo-harness-test in Ancienttwo/repo-harness) into .claude/skills/repo-harness-test in your project. Claude Code loads it when a task matches its description.

How do I install Repo Harness Test in Codex?

Run `npx skills add Ancienttwo/repo-harness --skill repo-harness-test -a codex`. Or copy the skill folder (assets/skills/repo-harness-test in Ancienttwo/repo-harness) into .agents/skills/repo-harness-test in your project. Codex loads it when a task matches its description.

Can I use Repo Harness Test in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add Ancienttwo/repo-harness --skill repo-harness-test -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/repo-harness-test, .gemini/skills/repo-harness-test, .github/skills/repo-harness-test and .opencode/skills/repo-harness-test in your project.

What does Repo Harness Test need to run?

SKILL.md names no scripts, command-line tools or credentials: Repo Harness Test is instructions for the agent only.

Does Repo Harness Test access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Repo Harness Test safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Repo Harness Test use?

Repo Harness Test is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Repo Harness Test use?

About 234 tokens (SKILL.md is roughly 936 characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 4.1k tokens, read only when the agent opens those files.

What are the alternatives to Repo Harness Test?

Skills that share tags, products or a category with Repo Harness Test: Select Name (thedaviddias/Front-End-Checklist, 74k stars), Engine Selection (sickn33/agentic-awesome-skills, 47k stars), OpenLogi Device Fixture Contribution (AprilNEA/OpenLogi, 23k stars) and Technology Selection (dotnet/skills, 5.6k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Repo Harness Test?

Ancienttwo (a GitHub user) maintains it in Ancienttwo/repo-harness, which has 434 GitHub stars. The repository holds 12 skills in this directory. The repository was last updated on October 10, 2026.

Source: Ancienttwo/repo-harness on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.