MCP Server Builder
anthropics/skills
Guides the design and implementation of Model Context Protocol servers in TypeScript or Python, from tool naming and error messages to evaluation.
Start Ouroboros onboarding. An agent skill from Q00/ouroboros.
Install Ooo
$ npx skills add Q00/ouroboros --skill ooo -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install Q00/ouroboros ooo --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/Q00/ouroboros.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/ooo .claude/skills/ooo && 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 "ooo" agent skill from https://github.com/Q00/ouroboros/tree/main/skills/ooo into .claude/skills/ooo/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ooo", 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/Q00/ouroboros/tree/main/skills/oooType 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 Q00/ouroboros --skill ooo -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install Q00/ouroboros ooo --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Q00/ouroboros.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/ooo .agents/skills/ooo && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "ooo" agent skill from https://github.com/Q00/ouroboros/tree/main/skills/ooo into .agents/skills/ooo/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ooo", 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 Q00/ouroboros --skill ooo -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install Q00/ouroboros ooo --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Q00/ouroboros.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/ooo .cursor/skills/ooo && 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 "ooo" agent skill from https://github.com/Q00/ouroboros/tree/main/skills/ooo into .cursor/skills/ooo/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ooo", 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/Q00/ouroboros.git --path skills/ooo--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 Q00/ouroboros --skill ooo -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install Q00/ouroboros ooo --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Q00/ouroboros.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/ooo .gemini/skills/ooo && 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 "ooo" agent skill from https://github.com/Q00/ouroboros/tree/main/skills/ooo into .gemini/skills/ooo/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ooo", 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 Q00/ouroboros oooInstalls 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 Q00/ouroboros --skill ooo -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/Q00/ouroboros.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/ooo .github/skills/ooo && 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 "ooo" agent skill from https://github.com/Q00/ouroboros/tree/main/skills/ooo into .github/skills/ooo/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ooo", 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 Q00/ouroboros --skill ooo -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install Q00/ouroboros ooo --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Q00/ouroboros.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/ooo .opencode/skills/ooo && 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 "ooo" agent skill from https://github.com/Q00/ouroboros/tree/main/skills/ooo into .opencode/skills/ooo/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "ooo", 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
ooo- GitHub stars
- 6.2k
- Token cost
- ~213 tokens
- SKILL.md length
- 92 words
- Files
- 1
- Skills in repo
- 23
- Repo updated
- First seen
- Licence
- MIT
At a glance
Start Ouroboros onboarding. An agent skill from Q00/ouroboros.
- The user sends bare ooo
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Asks to start Ouroboros
- Is using Ouroboros for the first time
What it does
Ooo is an agent skill from Q00/ouroboros. Start Ouroboros onboarding. Use when the user sends bare ooo, asks to start Ouroboros, or is using Ouroboros for the first time.
Its SKILL.md is about 210 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 Agent Workflows. The repository describes itself as: Agent OS: the agent gets smarter on its own. We just hold the line: Interview-gated, staged evaluation, budgeted evolution loop. MCP server, 14 runtimes: Claude Code, Codex CLI… The licence is MIT.
When your agent uses it
- The user sends bare ooo
- Asks to start Ouroboros
- Is using Ouroboros for the first time
Example prompts
- “/ooo”
What it can do on your machine
Read from SKILL.md and the folder at commit 0df5b98. 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
Ooo loads about 213 tokens when it runs. Until then it costs about 34 tokens; SKILL.md has 92 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 Q00/ouroboros at commit 0df5b98, republished under its MIT licence (© Q00). 92 words, ~213 tokens.
Download SKILL.mdSave it as
.claude/skills/ooo/SKILL.md (or your agent's skills folder).- name
- ooo
- description
- Start Ouroboros onboarding. Use when the user sends bare `ooo`, asks to start Ouroboros, or is using Ouroboros for the first time.
Start Ouroboros
Read ../welcome/SKILL.md and follow its instructions exactly. This is the
explicit Marketplace-plugin entry point for a bare ooo message before any
runtime-specific setup has run.
RFC #1392 State Breadcrumb Footer
Your final response MUST end with exactly one breadcrumb footer line:
◆ <current state> → next: <recommended action>Derive <current state> from live session state via ouroboros_session_status
when that MCP projection is available; otherwise derive it from this skill's
actual outcome. Never use a linear Step N of M footer because Ouroboros is an
evolutionary loop. The breadcrumb line must be the last line of the response.
© Q00, 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/ooo of Q00/ouroboros.
Open the folder on GitHubat commit 0df5b98
Compare with similar skills
Ooo 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 |
|---|---|---|---|---|---|---|
| Ooo this skillQ00/ouroboros | 6.2k | — | ~213 | Automated safety check: Pass | MIT | |
| MCP Server Builderanthropics/skills | 180k | 62 repos | ~2.3k | Automated safety check: Pass | Apache-2.0 | |
| Hook Development for Claude Code Pluginsanthropics/claude-plugins-official | 37k | 11 repos | ~4.1k | Automated safety check: Notes | Apache-2.0 | |
| Using Superpowersfarm-fe/farm | 5.6k | 34 repos | ~1.4k | Automated safety check: Pass | MIT | |
| Executing Plans Inlineobra/superpowers | 296k | 2 repos | ~5.1k | Automated safety check: Pass | MIT | |
| Claude Code Agent Developmentanthropics/claude-plugins-official | 37k | 8 repos | ~2.8k | Automated safety check: Pass | Apache-2.0 |
Similar skills
- Official
- Official
Hook Development for Claude Code Plugins
anthropics/claude-plugins-official
Explains how to write Claude Code plugin hooks, both prompt-based checks and bash commands, for events such as PreToolUse, Stop and SessionStart.
Using Superpowers
farm-fe/farm
A skill your agent uses when starting any conversation - establishes how to find and use skills, requiring Skill tool invocation before ANY response including clarifying questions
Executing Plans Inline
obra/superpowers
Has the agent carry out an implementation plan itself, task by task in the current session, keeping a ledger, proving each step with a test and ending with one whole-branch review.
- Official
Claude Code Agent Development
anthropics/claude-plugins-official
Explains how to write agents for Claude Code plugins: the markdown file with YAML frontmatter, trigger descriptions, model and color settings, and system prompt design.
- Official
Skill Creator
Azure/azqr
Create new skills, modify and improve existing skills, and measure skill performance.
More from Q00/ouroboros
All 23 skills in this repoOuroboros Maintainer Triage
Q00/ouroboros
Triages and works through GitHub issues and pull requests in the Q00/ouroboros repo as a maintainer, within a stated review boundary and clear limits on what it may change.
Ouroboros PM Interview
Q00/ouroboros
Runs a guided product-manager interview that classifies each question automatically and produces a Product Requirements Document.
Brownfield Repo Scanner
Q00/ouroboros
Scans a directory for existing git repositories and worktrees, then registers and manages which ones serve as default context during interviews.
Ouroboros Three-Stage Evaluate
Q00/ouroboros
Scores an agent's finished work with a three-stage pipeline: free mechanical checks, an advisory semantic review, and an optional multi-model consensus vote.
Ouroboros Evolve Loop
Q00/ouroboros
Starts, monitors or rewinds an evolutionary development loop that refines an ontology and acceptance criteria generation by generation until it converges, using the Ouroboros MCP tools.
Ouroboros Settings Opener
Q00/ouroboros
Opens or drives the Ouroboros settings GUI, picking a browser, TUI or chat-based approach depending on whether the user can reach a browser window.
Related
Categories
Questions about Ooo
What does Ooo do?
Start Ouroboros onboarding. An agent skill from Q00/ouroboros. Ooo is an agent skill from Q00/ouroboros. Start Ouroboros onboarding.
When should I use Ooo?
Ooo fits situations like: the user sends bare ooo; asks to start Ouroboros; is using Ouroboros for the first time.
How do I install Ooo in Claude Code?
Run `npx skills add Q00/ouroboros --skill ooo -a claude-code`. Or copy the skill folder (skills/ooo in Q00/ouroboros) into .claude/skills/ooo in your project. Claude Code loads it when a task matches its description.
How do I install Ooo in Codex?
Run `npx skills add Q00/ouroboros --skill ooo -a codex`. Or copy the skill folder (skills/ooo in Q00/ouroboros) into .agents/skills/ooo in your project. Codex loads it when a task matches its description.
Can I use Ooo 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 Q00/ouroboros --skill ooo -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/ooo, .gemini/skills/ooo, .github/skills/ooo and .opencode/skills/ooo in your project.
What does Ooo need to run?
SKILL.md names no scripts, command-line tools or credentials: Ooo is instructions for the agent only.
Does Ooo 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 Ooo 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 Ooo use?
Ooo 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 Ooo use?
About 213 tokens (SKILL.md is roughly 852 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 Ooo?
Skills that share tags, products or a category with Ooo: MCP Server Builder (anthropics/skills, 180k stars), Hook Development for Claude Code Plugins (anthropics/claude-plugins-official, 37k stars), Using Superpowers (farm-fe/farm, 5.6k stars) and Executing Plans Inline (obra/superpowers, 296k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Ooo?
Q00 (a GitHub user) maintains it in Q00/ouroboros, which has 6,189 GitHub stars. The repository holds 23 skills in this directory. The repository was last updated on October 6, 2026.
Source: Q00/ouroboros on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.