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Agent skill

Repo Harness Check

by Ancienttwo in Ancienttwo/repo-harness

Plan scoped harness work, review a plan, or assess recorded checks and risk.

MITAuto-check passed

Install Repo Harness Check

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

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

GitHub CLI
$ gh skill install Ancienttwo/repo-harness repo-harness-check --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/skill-commands/repo-harness-check .claude/skills/repo-harness-check && 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-check
GitHub stars
434
Token cost
~354 tokens
SKILL.md length
146 words
Files
4 (incl. references)
Skills in repo
12
Repo updated
First seen
Licence
MIT

At a glance

Plan scoped harness work, review a plan, or assess recorded checks and risk.

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

What it does

Repo Harness Check is an agent skill from Ancienttwo/repo-harness. Plan scoped harness work, review a plan, or assess recorded checks and risk. Do not execute implementation or publish by default.

Its SKILL.md is about 350 tokens, which your agent loads only when the skill is triggered. The skill folder holds 4 other files, including reference files (for example `references/create.md`, `references/deploy-readiness.md` and `references/review.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-check”

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 Check loads about 354 tokens when it runs, and up to ~1.2k if it reads all its reference files. Until then it costs about 37 tokens; SKILL.md has 146 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~37
When it runs · the whole SKILL.md, loaded when a task matches
~354
With references · SKILL.md plus every file in references/, read only if the agent opens them
~1.2k

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). 146 words, ~354 tokens.

Download SKILL.mdSave it as .claude/skills/repo-harness-check/SKILL.md (or your agent's skills folder). This skill also uses 3 other files; get the full folder from GitHub.
name
repo-harness-check
description
Plan scoped harness work, review a plan, or assess recorded checks and risk. Do not execute implementation or publish by default.
when_to_use
repo-harness-check

repo-harness-check

Bot entrypoint for planning and verification decisions. Confirm the repo, scope, subject revision and worker ownership.

Mode Selection

  • Create a plan only when a design decision needs it: references/create.md.
  • Review an existing plan: references/review.md.
  • Assess verification: consume commands, results, revision and environment. Ask the worker for missing checks from the target repo's agent instructions.
  • Deployment readiness: references/deploy-readiness.md.

Boundaries

Ordinary tasks do not require an Approved plan or a contract file. Reuse passing evidence only for its recorded subject. Run delta checks after edits. Report failed, stale, timed-out or omitted coverage. Missing optional tooling is a diagnostic. Use independent review for large changes, security/permissions, or unresolved uncertainty. Review does not authorize implementation or publication.

For skill-effectiveness claims, require full_test_count > 0, dry_run_ratio <= 30%, and graders reported. Mark non-authoritative: dry-run-heavy or all-dry-run evidence. Mark unavailable: no current eval evidence. Does not claim skill-effectiveness authority from dry-run benchmark output.

© 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 3 other files (references) in assets/skill-commands/repo-harness-check of Ancienttwo/repo-harness.

  • SKILL.md
  • references/create.md
  • references/deploy-readiness.md
  • references/review.md

Open the folder on GitHubat commit 461e054

Compare with similar skills

Repo Harness Check 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 Check compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Repo Harness Check this skillAncienttwo/repo-harness434—~354Automated safety check: PassMIT
Recordingcodewhale-hq/Codewhale41k—~540Automated safety check: PassMIT
Architecture Decision Recordsaffaan-m/ECC276k4 repos~1.8kAutomated safety check: PassMIT
Architecture Decision Recordsaffaan-m/ECC276k1 repos~863Automated safety check: PassMIT
Architecture Decision Recordsaffaan-m/ECC276k—~1.1kAutomated safety check: PassMIT
Conducting Cyber Risk Assessment With Nist 800 30mukul975/Anthropic-Cybersecurity-Skills34k—~2.5kAutomated safety check: PassApache-2.0

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More from Ancienttwo/repo-harness

All 12 skills in this repo

  • Development Scheduler

    Ancienttwo/repo-harness

    在 repo-harness session 或 Bot 中通过 Herdr 调度开发任务、跟进阻碍、组织独立审查和安全交接；用于多角色开发协调，不用于单次代码修改或只读状态查询。

    434 GitHub stars~703 tokensUpdated today
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  • Repo Harness

    Ancienttwo/repo-harness

    Route explicit repo-harness commands and active harness work.

    434 GitHub stars~365 tokensUpdated today
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  • Repo Harness Chatgpt

    Ancienttwo/repo-harness

    Canonical rule owner for repo-harness ChatGPT integration -- Oracle-first browser/GPT Pro consult and continuation, advisory orchestration, MCP Connector setup, MCP bridge planning handoff, and…

    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

    Ancienttwo/repo-harness

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

    434 GitHub stars~533 tokensUpdated today
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Questions about Repo Harness Check

What does Repo Harness Check do?

Plan scoped harness work, review a plan, or assess recorded checks and risk. Repo Harness Check is an agent skill from Ancienttwo/repo-harness. Plan scoped harness work, review a plan, or assess recorded checks and risk.

How do I install Repo Harness Check in Claude Code?

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

How do I install Repo Harness Check in Codex?

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

Can I use Repo Harness Check 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-check -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-check, .gemini/skills/repo-harness-check, .github/skills/repo-harness-check and .opencode/skills/repo-harness-check in your project.

What does Repo Harness Check need to run?

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

Does Repo Harness Check 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 Check 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 Check use?

Repo Harness Check 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 Check use?

About 354 tokens (SKILL.md is roughly 1.4k 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 869 tokens, read only when the agent opens those files.

What are the alternatives to Repo Harness Check?

Skills that share tags, products or a category with Repo Harness Check: Recording (codewhale-hq/Codewhale, 41k stars), Architecture Decision Records (affaan-m/ECC, 276k stars), Architecture Decision Records (affaan-m/ECC, 276k stars) and Architecture Decision Records (affaan-m/ECC, 276k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Repo Harness Check?

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.