Agent skill

Harness Mint

Scaffold a custom AI agent harness via metaharness new <name --template <id --host <id.

MITAuto-check: notesDevelopment

Install Harness Mint

skills CLI

$ npx skills add ruvnet/ruflo --skill harness-mint -a claude-code

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

GitHub CLI

$ gh skill install ruvnet/ruflo harness-mint --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/ruvnet/ruflo.git skills-src && mkdir -p .claude/skills && cp -r skills-src/plugins/ruflo-metaharness/skills/harness-mint .claude/skills/harness-mint && 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/

Paste into Claude Code

Install the "harness-mint" agent skill from https://github.com/ruvnet/ruflo/tree/main/plugins/ruflo-metaharness/skills/harness-mint into .claude/skills/harness-mint/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "harness-mint", 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

$skill-installer install https://github.com/ruvnet/ruflo/tree/main/plugins/ruflo-metaharness/skills/harness-mint

Type 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.

skills CLI

$ npx skills add ruvnet/ruflo --skill harness-mint -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install ruvnet/ruflo harness-mint --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/ruvnet/ruflo.git skills-src && mkdir -p .agents/skills && cp -r skills-src/plugins/ruflo-metaharness/skills/harness-mint .agents/skills/harness-mint && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "harness-mint" agent skill from https://github.com/ruvnet/ruflo/tree/main/plugins/ruflo-metaharness/skills/harness-mint into .agents/skills/harness-mint/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "harness-mint", 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.

skills CLI

$ npx skills add ruvnet/ruflo --skill harness-mint -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install ruvnet/ruflo harness-mint --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/ruvnet/ruflo.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/plugins/ruflo-metaharness/skills/harness-mint .cursor/skills/harness-mint && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "harness-mint" agent skill from https://github.com/ruvnet/ruflo/tree/main/plugins/ruflo-metaharness/skills/harness-mint into .cursor/skills/harness-mint/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "harness-mint", 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

$ gemini skills install https://github.com/ruvnet/ruflo.git --path plugins/ruflo-metaharness/skills/harness-mint

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add ruvnet/ruflo --skill harness-mint -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install ruvnet/ruflo harness-mint --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/ruvnet/ruflo.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/plugins/ruflo-metaharness/skills/harness-mint .gemini/skills/harness-mint && rm -rf skills-src

Use ~/.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/

Paste into Gemini CLI

Install the "harness-mint" agent skill from https://github.com/ruvnet/ruflo/tree/main/plugins/ruflo-metaharness/skills/harness-mint into .gemini/skills/harness-mint/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "harness-mint", 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.

GitHub CLI

$ gh skill install ruvnet/ruflo harness-mint

Installs 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).

skills CLI

$ npx skills add ruvnet/ruflo --skill harness-mint -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/ruvnet/ruflo.git skills-src && mkdir -p .github/skills && cp -r skills-src/plugins/ruflo-metaharness/skills/harness-mint .github/skills/harness-mint && rm -rf skills-src

Use ~/.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/

Paste into GitHub Copilot

Install the "harness-mint" agent skill from https://github.com/ruvnet/ruflo/tree/main/plugins/ruflo-metaharness/skills/harness-mint into .github/skills/harness-mint/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "harness-mint", 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.

skills CLI

$ npx skills add ruvnet/ruflo --skill harness-mint -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install ruvnet/ruflo harness-mint --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/ruvnet/ruflo.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/plugins/ruflo-metaharness/skills/harness-mint .opencode/skills/harness-mint && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "harness-mint" agent skill from https://github.com/ruvnet/ruflo/tree/main/plugins/ruflo-metaharness/skills/harness-mint into .opencode/skills/harness-mint/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "harness-mint", 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-mint
GitHub stars: 74k
Used in: 1 other repo
Token cost: ~720 tokens
SKILL.md length: 235 words
Files: 1
Skills in repo: 264
Repo updated: Oct 8, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

Scaffold a custom AI agent harness via metaharness new <name --template <id --host <id.

Works in 4 steps: Dry-run by default. Without --confirm,… → Refuses project root. If --target… → Refuses existing target. Won't overwrite… → …
Tasks that involve Architecture decision records
SKILL.md covers Safety (load-bearing), Algorithm, Templates and Hosts, plus 2 more sections
Calls node

What it does

Harness Mint is an agent skill from ruvnet/ruflo. Scaffold a custom AI agent harness via metaharness new <name --template <id --host <id. Defaults to DRY-RUN (no writes) unless --confirm is passed. Refuses to write to the calling repo root or anywhere inside it. Honors ADR-150 architectural constraint + ruflo's "destructive-action confirmation" pattern.

Its SKILL.md is about 720 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Development, covering Architecture decision records. The repository describes itself as: 🌊 The original agent harness. Deploy intelligent multi-player swarms, coordinate autonomous workflows, and build conversational AI systems. Features adaptive memory…. The licence is MIT.

When your agent uses it

Tasks that involve Architecture decision records

Example prompts

“destructive-action confirmation”
“/harness-mint”

Requirements

Node.js
Pre-approved tools (allowed-tools): Bash

Workflow steps

4 steps, taken from the first numbered list in SKILL.md.

Dry-run by default. Without --confirm, the script prints what
Refuses project root. If --target resolves to the current
Refuses existing target. Won't overwrite — must scaffold into a
Subprocess + 60s timeout. No library import, no in-process

What it can do on your machine

Read from SKILL.md and the folder at commit 6051f67. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves these tools, so the agent can use them without asking each time:
- Bash
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
- node
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 Mint loads about 720 tokens when it runs. Until then it costs about 81 tokens; SKILL.md has 235 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~81
When it runs · the whole SKILL.md, loaded when a task matches: ~720

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: notes

The automated check noted patterns worth knowing about, such as sudo or a known installer.

NotePre-approves every shell command (allowed-tools: Bash)SKILL.md
```
allowed-tools: Bash
```

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 ruvnet/ruflo at commit 6051f67, republished under its MIT licence (© ruvnet). 235 words, ~720 tokens.

Download SKILL.mdSave it as .claude/skills/harness-mint/SKILL.md (or your agent's skills folder).

name: harness-mint
description: Scaffold a custom AI agent harness via `metaharness new <name> --template <id> --host <id>`. Defaults to DRY-RUN (no writes) unless --confirm is passed. Refuses to write to the calling repo root or anywhere inside it. Honors ADR-150 architectural constraint + ruflo's "destructive-action confirmation" pattern.
allowed-tools: Bash
argument-hint: --name <id> --template <vertical:coding|minimal|…> [--host claude-code|codex|…] [--target /abs/path] [--confirm] [--format table|json]

The one write-capable skill in the plugin. Every other skill is pure-read. This one calls metaharness new, which writes a new directory tree.

Safety (load-bearing)

Dry-run by default. Without --confirm, the script prints what it would do and exits 0 without touching disk.
Refuses project root. If --target resolves to the current working directory OR any path inside it, the script errors out with exit 2. Target must be an absolute path OUTSIDE the calling repo (default is a fresh /tmp/ruflo-mint-<ts>-<name>/ dir).
Refuses existing target. Won't overwrite — must scaffold into a non-existent dir.
Subprocess + 60s timeout. No library import, no in-process execution. The mint stays sandboxed from ruflo's runtime.

Algorithm

Implementation: scripts/mint.mjs.

Validate --name, --template. Default --host to claude-code.
Resolve --target (default: temp dir).
Run safety checks (no project-root writes; target must not exist).
Without --confirm: emit dry-run plan, exit 0.
With --confirm: shell npx metaharness new <name> --template <id> --host <id> --target <abs> --yes.

Templates

minimal, vertical:coding, vertical:devops, vertical:support, vertical:legal, vertical:research, vertical:trading, vertical:health, vertical:education, vertical:sales, vertical:business, vertical:crm, vertical:marketing, vertical:advertising, vertical:ai, vertical:agentics, vertical:ruview, vertical:gaming, vertical:repo-maintainer, vertical:exotic.

Hosts

claude-code, codex, pi-dev, hermes, openclaw, rvm, copilot, opencode, github-actions.

Example dry-run

$ node scripts/mint.mjs --name my-harness --template vertical:coding --host claude-code
# harness-mint (dry-run)

- action: metaharness new
- name: my-harness
- template: vertical:coding
- host: claude-code
- target: /tmp/ruflo-mint-1718560000-my-harness
- confirm: false
- willWrite: false

Re-run with `--confirm` to actually scaffold.

Why dry-run by default

Ruflo's behavioral rules say "executing actions with care" — destructive or repo-touching actions need confirmation. The dry-run output makes the WHAT visible before the WHEN. A human sees target, decides, then adds --confirm if happy.

Files

Just SKILL.md in plugins/ruflo-metaharness/skills/harness-mint of ruvnet/ruflo.

Open the folder on GitHubat commit 6051f67

Used in 1 other repository

We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in ruvnet/ruflo, which our catalogue first saw on October 7, 2026.

majiayu000/claude-skill-registryskills/bash/harness-mint

Compare with similar skills

Harness Mint 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.

Harness Mint compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Harness Mint this skillruvnet/ruflo	74k	1 repos	~720	Automated safety check: Notes	MIT	today
PR Design DocOpenHands/OpenHands	90k	—	~2.4k	Automated safety check: Pass	MIT	today
Cto AdvisorIbrahim-3d/orchestrator-supaconductor	380	4 repos	~2.4k	Automated safety check: Pass	MIT	11 days ago
Improve Codebase Architectureywwynm/EverythingDone	144	15 repos	~1.3k	Automated safety check: Pass	GPL-3.0	24 days ago
Domain Modelingbrim-borium/spotify_sdk	166	5 repos	~806	Automated safety check: Pass	Apache-2.0	2 days ago
Design Doc MermaidSpillwaveSolutions/design-doc-mermaid	175	1 repos	~5.6k	Automated safety check: Pass	None	1 mo ago

Similar skills

PR Design Doc
OpenHands/OpenHands
For a non-trivial pull request, write a self-contained HTML design doc under the temporary .pr/ directory and link a visibility-appropriate preview in the PR description, so maintainers grasp the…
90k GitHub stars~2.4k tokensUpdated today
DevelopmentAuto-check passed
Cto Advisor
Ibrahim-3d/orchestrator-supaconductor
Technical leadership guidance for engineering teams, architecture decisions, and technology strategy.
380 GitHub starsUsed in 4 repos~2.4k tokens
DevelopmentAuto-check passed
Improve Codebase Architecture
ywwynm/EverythingDone
Find deepening opportunities in a codebase, informed by the domain language in CONTEXT.md and the decisions in docs/adr/.
144 GitHub starsUsed in 15 repos~1.3k tokens
DevelopmentAuto-check passed
Domain Modeling
brim-borium/spotify_sdk
Build and sharpen a project's domain model. An agent skill from brim-borium/spotify_sdk.
166 GitHub starsUsed in 5 repos~806 tokens
DevelopmentAuto-check passed
Design Doc Mermaid
SpillwaveSolutions/design-doc-mermaid
Create Mermaid diagrams (flowchart, sequence, class, ER, state, C4, architecture) from text or source code.
175 GitHub starsUsed in 1 repo~5.6k tokens
DevelopmentAuto-check passed
Learning Opportunities
DrCatHicks/learning-opportunities
Facilitates deliberate skill development during AI-assisted coding.
2.5k GitHub stars~2.5k tokensUpdated 1 mo ago
DevelopmentAuto-check passed

Questions about Harness Mint

What does Harness Mint do?

Scaffold a custom AI agent harness via metaharness new <name --template <id --host <id. Harness Mint is an agent skill from ruvnet/ruflo. Scaffold a custom AI agent harness via metaharness new <name --template <id --host <id.

When should I use Harness Mint?

Harness Mint fits situations like: tasks that involve Architecture decision records.

How do I install Harness Mint in Claude Code?

Run `npx skills add ruvnet/ruflo --skill harness-mint -a claude-code`. Or copy the skill folder (plugins/ruflo-metaharness/skills/harness-mint in ruvnet/ruflo) into .claude/skills/harness-mint in your project. Claude Code loads it when a task matches its description.

How do I install Harness Mint in Codex?

Run `npx skills add ruvnet/ruflo --skill harness-mint -a codex`. Or copy the skill folder (plugins/ruflo-metaharness/skills/harness-mint in ruvnet/ruflo) into .agents/skills/harness-mint in your project. Codex loads it when a task matches its description.

Can I use Harness Mint 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 ruvnet/ruflo --skill harness-mint -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-mint, .gemini/skills/harness-mint, .github/skills/harness-mint and .opencode/skills/harness-mint in your project.

What does Harness Mint need to run?

Going by SKILL.md and its folder, Harness Mint needs the command-line tools its instructions call (node). Our summary lists: Node.js. Its frontmatter pre-approves these tools: Bash.

Does Harness Mint 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 Mint safe to install?

Our automated static check of SKILL.md found notes only (pre-approves every shell command (allowed-tools: bash)), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.

What licence does Harness Mint use?

Harness Mint 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 Mint use?

About 720 tokens (SKILL.md is roughly 2.9k 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 Mint?

Skills that share tags, products or a category with Harness Mint: PR Design Doc (OpenHands/OpenHands, 90k stars), Cto Advisor (Ibrahim-3d/orchestrator-supaconductor, 380 stars), Improve Codebase Architecture (ywwynm/EverythingDone, 144 stars) and Domain Modeling (brim-borium/spotify_sdk, 166 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Harness Mint?

ruvnet (a GitHub user) maintains it in ruvnet/ruflo, which has 74,089 GitHub stars. The repository holds 264 skills in this directory. The repository was last updated on October 8, 2026.

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

Install Harness Mint

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Safety (load-bearing)

Algorithm

Templates

Hosts

Example dry-run

Why dry-run by default

Files

Used in 1 other repository

Compare with similar skills

Similar skills

More from ruvnet/ruflo

Related

Questions about Harness Mint