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Agent skill

Share Skills

by spinabot in spinabot/brigade

Explains how a skill folder should be laid out and bundled as a tar archive for sharing, with a checklist covering name, description and eligibility keys.

MITAuto-check passedAgent Workflows

Install Share Skills

skills CLI
$ npx skills add spinabot/brigade --skill share-skills -a claude-code

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

GitHub CLI
$ gh skill install spinabot/brigade share-skills --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/spinabot/brigade.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/share-skills .claude/skills/share-skills && 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
share-skills
GitHub stars
11k
Token cost
~759 tokens
SKILL.md length
324 words
Files
1
Skills in repo
11
Repo updated
First seen
Licence
MIT

At a glance

Explains how a skill folder should be laid out and bundled as a tar archive for sharing, with a checklist covering name, description and eligibility keys.

  • Packaging a skill folder to hand to a colleague
  • SKILL.md covers Where skills live, SKILL.md format, Versioning a shared skill and Packaging a folder to share, plus 1 more section
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
  • Checking that a skill's name matches its folder and frontmatter

What it does

A companion to skill authoring: where a skill-creator helps write the content, this covers structure. Each skill is a folder under skills/ whose lowercase name must match the name field in its SKILL.md frontmatter, and a SKILL.md is Markdown with a YAML frontmatter block followed by the body. The body should open with a short overview, describe only actions the runtime can perform, refer to supporting files by relative path and stay lean.

For sharing, the whole folder is archived with tar so supporting files travel along. The recipient unpacks it into their own skills directory and re-checks that the name still matches and that eligibility keys such as os, requires-bins, requires-any-bins and requires-env fit the new environment. A changelog section or a CHANGELOG.md helps recipients tell versions apart, and a closing checklist covers name, description, eligibility keys and file references.

When your agent uses it

  • Packaging a skill folder to hand to a colleague
  • Checking that a skill's name matches its folder and frontmatter
  • Adding a changelog and eligibility keys before sharing a skill

Example prompts

  • “Package my release-notes skill folder into a tar archive I can send to a teammate.”
  • “Check that my skill folder follows the SKILL.md format before I share it.”
  • “Add a changelog section and eligibility keys to this skill.”

Requirements

  • tar for creating and unpacking the archive

What it can do on your machine

Read from SKILL.md and the folder at commit 4c2a18f. 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 (its code samples are bash and yaml).

    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

Share Skills loads about 759 tokens when it runs. Until then it costs about 48 tokens; SKILL.md has 324 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~48
When it runs · the whole SKILL.md, loaded when a task matches
~759

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 spinabot/brigade at commit 4c2a18f, republished under its MIT licence (© spinabot). 324 words, ~759 tokens.

Download SKILL.mdSave it as .claude/skills/share-skills/SKILL.md (or your agent's skills folder).
name
share-skills
description
Use when you need to author, package, or share a skill folder — understanding the SKILL.md format, where skills live, and how to bundle a folder so it can be shared with others.

Sharing Skills

This skill explains how skills are structured and how to package one for sharing. It is a companion to skill authoring: where skill-creator helps you write a skill, this covers laying it out correctly and bundling it to hand off.

Where skills live

Each skill is a folder under the skills/ directory. The folder name is the skill's identity and must match the name field in its frontmatter (lowercase). At minimum a skill folder contains a SKILL.md; it may also include supporting files (scripts, reference docs, assets) the skill refers to.

skills/
  my-skill/
    SKILL.md
    reference.md        # optional supporting docs
    scripts/run.sh      # optional helper scripts

SKILL.md format

A SKILL.md is a Markdown file with a YAML frontmatter block followed by the skill body.

yaml
---
name: my-skill          # must equal the folder name, lowercase
description: Use when ...  # the "use when" trigger guidance, product-free
# optional eligibility keys (omit any that don't apply):
os: [darwin, linux]       # OS restriction
requires-bins: [foo]      # binaries that MUST be present
requires-any-bins: [a, b] # at least one of these binaries
requires-env: [MY_TOKEN]  # required environment variables
---

Body guidelines:

  • Open with a short overview of what the skill does and when to reach for it.
  • Keep instructions truthful: only describe actions the runtime can actually perform.
  • Reference any supporting files by relative path within the folder.
  • Keep it lean — the description and metadata are what get surfaced; the body is read on demand.

Versioning a shared skill

When you intend to share a skill, keep a changelog note and a version in mind so recipients can tell revisions apart. A simple convention is a ## Changelog section at the bottom of SKILL.md or a sibling CHANGELOG.md.

Packaging a folder to share

To share a skill, bundle its entire folder (so supporting files travel with it) and hand it off as an archive.

bash
# from the skills/ directory, archive a single skill folder
tar -czf my-skill.tar.gz my-skill/

The recipient unpacks the archive into their own skills/ directory:

bash
tar -xzf my-skill.tar.gz -C ./skills/

After unpacking, confirm the folder name still matches the name in frontmatter and that any requires-* eligibility keys are accurate for the new environment.

Checklist before sharing

  • name equals the folder name (lowercase).
  • description is present and free of product names.
  • Eligibility keys (os / requires-bins / requires-any-bins / requires-env) reflect real requirements — omit them when there are none.
  • Supporting files are inside the folder and referenced by relative path.
  • The body never instructs calling a tool the runtime does not have.

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

Files

Just SKILL.md in skills/share-skills of spinabot/brigade.

Open the folder on GitHubat commit 4c2a18f

Compare with similar skills

Share Skills 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.

Share Skills compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Share Skills this skillspinabot/brigade11k—~759Automated safety check: PassMIT
Darwin Skill Optimizeralchaincyf/darwin-skill6.2k1 repos~4.7kAutomated safety check: PassMIT
Skill Creatorzhayujie/CowAgent47k—~4.7kAutomated safety check: NotesMIT
Open-Science Skill Creatoraipoch/open-science5.5k—~1.7kAutomated safety check: PassApache-2.0
Skill Quality ReviewerGalaxy-Dawn/claude-scholar5.7k1 repos~3kAutomated safety check: PassMIT
Prismer Skill CreatorPrismer-AI/PrismerCloud1.6k—~2.6kAutomated safety check: NotesMIT

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  • Skill Creator

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Categories

Questions about Share Skills

What does Share Skills do?

Explains how a skill folder should be laid out and bundled as a tar archive for sharing, with a checklist covering name, description and eligibility keys. A companion to skill authoring: where a skill-creator helps write the content, this covers structure.md is Markdown with a YAML frontmatter block followed by the body.

When should I use Share Skills?

Share Skills fits situations like: packaging a skill folder to hand to a colleague; checking that a skill's name matches its folder and frontmatter; adding a changelog and eligibility keys before sharing a skill.

How do I install Share Skills in Claude Code?

Run `npx skills add spinabot/brigade --skill share-skills -a claude-code`. Or copy the skill folder (skills/share-skills in spinabot/brigade) into .claude/skills/share-skills in your project. Claude Code loads it when a task matches its description.

How do I install Share Skills in Codex?

Run `npx skills add spinabot/brigade --skill share-skills -a codex`. Or copy the skill folder (skills/share-skills in spinabot/brigade) into .agents/skills/share-skills in your project. Codex loads it when a task matches its description.

Can I use Share Skills 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 spinabot/brigade --skill share-skills -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/share-skills, .gemini/skills/share-skills, .github/skills/share-skills and .opencode/skills/share-skills in your project.

What does Share Skills need to run?

SKILL.md names no scripts, command-line tools or credentials: Share Skills is instructions for the agent only. Our summary lists: tar for creating and unpacking the archive.

Does Share Skills 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 Share Skills 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 Share Skills use?

Share Skills 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 Share Skills use?

About 759 tokens (SKILL.md is roughly 3k 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 Share Skills?

Skills that share tags, products or a category with Share Skills: Darwin Skill Optimizer (alchaincyf/darwin-skill, 6.2k stars), Skill Creator (zhayujie/CowAgent, 47k stars), Open-Science Skill Creator (aipoch/open-science, 5.5k stars) and Skill Quality Reviewer (Galaxy-Dawn/claude-scholar, 5.7k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Share Skills?

spinabot (a GitHub organization) maintains it in spinabot/brigade, which has 11,308 GitHub stars. The repository holds 11 skills in this directory. The repository was last updated on October 9, 2026.

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