Qwen Agent
thananon/9arm-skills
Delegate menial, well-scoped coding tasks to a cheap Qwen-backed subagent via the claude-9arm command instead of burning Claude tokens/quota.
Route Harness Starter Kit workflows. An agent skill from harnessworks/harness-starter-kit.
Install Harness
$ npx skills add harnessworks/harness-starter-kit --skill harness -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install harnessworks/harness-starter-kit harness --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/harnessworks/harness-starter-kit.git skills-src && mkdir -p .claude/skills && cp -r skills-src/agent-skills/skills/harness .claude/skills/harness && rm -rf skills-srcUse ~/.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/
Install the "harness" agent skill from https://github.com/harnessworks/harness-starter-kit/tree/main/agent-skills/skills/harness into .claude/skills/harness/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "harness", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/harnessworks/harness-starter-kit/tree/main/agent-skills/skills/harnessType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add harnessworks/harness-starter-kit --skill harness -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install harnessworks/harness-starter-kit harness --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/harnessworks/harness-starter-kit.git skills-src && mkdir -p .agents/skills && cp -r skills-src/agent-skills/skills/harness .agents/skills/harness && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "harness" agent skill from https://github.com/harnessworks/harness-starter-kit/tree/main/agent-skills/skills/harness into .agents/skills/harness/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "harness", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add harnessworks/harness-starter-kit --skill harness -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install harnessworks/harness-starter-kit harness --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/harnessworks/harness-starter-kit.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/agent-skills/skills/harness .cursor/skills/harness && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "harness" agent skill from https://github.com/harnessworks/harness-starter-kit/tree/main/agent-skills/skills/harness into .cursor/skills/harness/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "harness", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/harnessworks/harness-starter-kit.git --path agent-skills/skills/harness--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add harnessworks/harness-starter-kit --skill harness -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install harnessworks/harness-starter-kit harness --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/harnessworks/harness-starter-kit.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/agent-skills/skills/harness .gemini/skills/harness && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "harness" agent skill from https://github.com/harnessworks/harness-starter-kit/tree/main/agent-skills/skills/harness into .gemini/skills/harness/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "harness", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install harnessworks/harness-starter-kit harnessInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add harnessworks/harness-starter-kit --skill harness -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/harnessworks/harness-starter-kit.git skills-src && mkdir -p .github/skills && cp -r skills-src/agent-skills/skills/harness .github/skills/harness && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "harness" agent skill from https://github.com/harnessworks/harness-starter-kit/tree/main/agent-skills/skills/harness into .github/skills/harness/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "harness", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add harnessworks/harness-starter-kit --skill harness -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install harnessworks/harness-starter-kit harness --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/harnessworks/harness-starter-kit.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/agent-skills/skills/harness .opencode/skills/harness && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "harness" agent skill from https://github.com/harnessworks/harness-starter-kit/tree/main/agent-skills/skills/harness into .opencode/skills/harness/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "harness", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
harness- GitHub stars
- 115
- Token cost
- ~490 tokens
- SKILL.md length
- 188 words
- Files
- 2
- Skills in repo
- 6
- Repo updated
- First seen
- Licence
- MIT
At a glance
Route Harness Starter Kit workflows. An agent skill from harnessworks/harness-starter-kit.
- Works in 5 steps: Read ../../references/package-contract.md. → Identify the requested subcommand → If the target repository has… → …
- The user invokes /harness with adopt
- SKILL.md covers Steps and Subcommand Map
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Harness is an agent skill from harnessworks/harness-starter-kit. Route Harness Starter Kit workflows. Use when the user invokes /harness with adopt, doctor, update, refresh, review, or review sub-agent, or asks to apply, diagnose, maintain, or review repository harness guidance.
Its SKILL.md is about 490 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files (for example `agents/openai.yaml`).
It sits in Development, covering Project scaffolding and Subagents. The repository describes itself as: 🐴 Prompt-first harness engineering for safer AI coding agent workflows. The licence is MIT.
When your agent uses it
- The user invokes /harness with adopt
- Review sub-agent
- Review repository harness guidance
Example prompts
- “/harness”
Workflow steps
5 steps, taken from the first numbered list in SKILL.md.
- Read ../../references/package-contract.md.
- Identify the requested subcommand
- If the target repository has ./harness-starter-kit, prefer the matching
- Execute the selected workflow exactly according to its mutation boundary
- Finish with the workflow's required report shape. For substantial harness
What it can do on your machine
Read from SKILL.md and the folder at commit 62437be. 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
Harness loads about 490 tokens when it runs. Until then it costs about 56 tokens; SKILL.md has 188 words of instructions outside code blocks.
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 harnessworks/harness-starter-kit at commit 62437be, republished under its MIT licence (© harnessworks). 188 words, ~490 tokens.
Download SKILL.mdSave it as
.claude/skills/harness/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.- name
- harness
- description
- Route Harness Starter Kit workflows. Use when the user invokes /harness with adopt, doctor, update, refresh, review, or review sub-agent, or asks to apply, diagnose, maintain, or review repository harness guidance.
- argument-hint
- [adopt|doctor|update|refresh|review] [details]
Harness
Use this as the command router for Harness Starter Kit workflows.
Steps
- Read
../../references/package-contract.md. - Identify the requested subcommand:
adopt,apply, or no subcommand with an adoption request: read../../references/adopt-workflow.md.doctor: read../../references/doctor-workflow.md.update: read../../references/update-workflow.md.refresh: read../../references/refresh-workflow.md.revieworreview sub-agent: read../../references/review-workflow.md.
- If the target repository has
./harness-starter-kit, prefer the matching canonical workflow doc from that clone over the bundled reference. - Execute the selected workflow exactly according to its mutation boundary: diagnostic workflows inspect and report; adoption and update workflows may edit only when the user asked for that work.
- Finish with the workflow's required report shape. For substantial harness work, say whether task outcome evidence was recorded or skipped and why.
Subcommand Map
| Request | Workflow |
|---|---|
/harness adopt | Apply prompt-first harness engineering to a target repository. |
/harness doctor | Score durable harness evidence without modifying files. |
/harness update | Refresh a target harness from a confirmed kit source. |
/harness refresh | Review stale, duplicated, obsolete, or unused harness guidance. |
/harness review | Challenge the current diff from a harness-engineering perspective. |
/harness review sub-agent | Try the read-only reviewer subagent path, then fall back if unavailable. |
© harnessworks, 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 1 other file in agent-skills/skills/harness of harnessworks/harness-starter-kit.
- SKILL.md
- agents/openai.yaml
Open the folder on GitHubat commit 62437be
Compare with similar skills
Harness 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.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Harness this skillharnessworks/harness-starter-kit | 115 | — | ~490 | Automated safety check: Pass | MIT | |
| Qwen Agentthananon/9arm-skills | 3.2k | — | ~1.5k | Automated safety check: Pass | None | |
| Antigravityyuting0624/antigravity-for-claude-code | 377 | — | ~9.1k | Automated safety check: Pass | MIT | |
| Dlab CLIpymc-labs/decision-lab | 199 | — | ~957 | Automated safety check: Pass | Apache-2.0 | |
| Project Healthjezweb/claude-skills | 1.1k | — | ~3k | Automated safety check: Pass | MIT | |
| Agent Buildertestdouble/han | 279 | — | ~3.8k | Automated safety check: Pass | MIT |
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More from harnessworks/harness-starter-kit
Harness Adopt
harnessworks/harness-starter-kit
Apply Harness Starter Kit prompt-first adoption to a target repository.
Harness Doctor
harnessworks/harness-starter-kit
Run the diagnostic Harness Doctor workflow. An agent skill from harnessworks/harness-starter-kit.
Harness Refresh
harnessworks/harness-starter-kit
Review stale, duplicated, obsolete, or unused target harness guidance.
Harness Review
harnessworks/harness-starter-kit
Review the current change set from an opposing harness-engineering perspective.
Harness Update
harnessworks/harness-starter-kit
Refresh an adopted target repository from the latest Harness Starter Kit reference.
Related
Categories
Questions about Harness
What does Harness do?
Route Harness Starter Kit workflows. An agent skill from harnessworks/harness-starter-kit. Harness is an agent skill from harnessworks/harness-starter-kit. Route Harness Starter Kit workflows.
When should I use Harness?
Harness fits situations like: the user invokes /harness with adopt; review sub-agent; review repository harness guidance.
How do I install Harness in Claude Code?
Run `npx skills add harnessworks/harness-starter-kit --skill harness -a claude-code`. Or copy the skill folder (agent-skills/skills/harness in harnessworks/harness-starter-kit) into .claude/skills/harness in your project. Claude Code loads it when a task matches its description.
How do I install Harness in Codex?
Run `npx skills add harnessworks/harness-starter-kit --skill harness -a codex`. Or copy the skill folder (agent-skills/skills/harness in harnessworks/harness-starter-kit) into .agents/skills/harness in your project. Codex loads it when a task matches its description.
Can I use Harness 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 harnessworks/harness-starter-kit --skill harness -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/harness, .gemini/skills/harness, .github/skills/harness and .opencode/skills/harness in your project.
What does Harness need to run?
SKILL.md names no scripts, command-line tools or credentials: Harness is instructions for the agent only.
Does Harness 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 Harness 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 Harness use?
Harness 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 Harness use?
About 490 tokens (SKILL.md is roughly 2k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Harness?
Skills that share tags, products or a category with Harness: Qwen Agent (thananon/9arm-skills, 3.2k stars), Antigravity (yuting0624/antigravity-for-claude-code, 377 stars), Dlab CLI (pymc-labs/decision-lab, 199 stars) and Project Health (jezweb/claude-skills, 1.1k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Harness?
harnessworks (a GitHub organization) maintains it in harnessworks/harness-starter-kit, which has 115 GitHub stars. The repository holds 6 skills in this directory. The repository was last updated on June 18, 2026.
Source: harnessworks/harness-starter-kit on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.