Agent Plugins Marketplace
← All plugins

ultrathink

v1.1.2+codex.6e4fdf6d3704

Invoke deep sequential thinking for complex problem-solving. Use when the user says 'use ultrathink', 'ultrathink', or when tackling problems that require careful step-by-step reasoning, planning, hypothesis generation, or multi-step analysis.

Codex1 Skill

By Alberto LealLicense: MIT22 GitHub starsUpdated 1 hour ago

Directory evidence

Runtimes
Codex
Parsed components
1 skill or MCP entry
Source updated
Aug 28, 2026
Manifest status
Canonical path parsed

The directory validates manifest shape and source location. It does not execute the plugin or provide a security endorsement. Review the indexing methodology →

Install plugin

Installs for the current user
codex plugin marketplace add IchenDEV/agent-plugin-mkt
codex plugin marketplace upgrade agent-plugin-marketplace
codex plugin add ultrathink@agent-plugin-marketplace

Paste and run these commands in a terminal with Codex. They add and refresh the PluginsMP catalog, then install this plugin.

The installer fetches third-party code from the source repository shown on this page. This directory validates manifest structure and source location, but does not perform a security audit; review the manifest, components, and source before installing.

Get the source manually
git clone https://github.com/dashed/claude-marketplace

Clone the source repository, then follow its setup instructions to add the plugin to a compatible client. The plugin root is plugins/ultrathink/.

Plugin files

plugins/ultrathink/
├── .codex-plugin/plugin.json
└── skills/ultrathink/SKILL.md

Included Skills1

ultrathinkskills/ultrathink/SKILL.md

Invoke deep sequential thinking for complex problem-solving. Use when the user says 'use ultrathink', 'ultrathink', or when tackling problems that require careful step-by-step reasoning, planning, hypothesis generation, or multi-step analysis.

Plugin manifests1

plugins/ultrathink/.codex-plugin/plugin.json
{
  "name": "ultrathink",
  "version": "1.1.2+codex.6e4fdf6d3704",
  "description": "Invoke deep sequential thinking for complex problem-solving. Use when the user says 'use ultrathink', 'ultrathink', or when tackling problems that require careful step-by-step reasoning, planning, hypothesis generation, or multi-step analysis.",
  "author": {
    "name": "Alberto Leal"
  },
  "license": "MIT",
  "keywords": [
    "thinking",
    "reasoning",
    "sequential",
    "planning",
    "analysis",
    "problem-solving"
  ],
  "interface": {
    "displayName": "Ultrathink",
    "shortDescription": "Invoke deep sequential thinking for complex problem-solving. Use when the user says 'use ultrathink', 'ultrathink', or when tackling problems that require careful step-by-step...",
    "longDescription": "Invoke deep sequential thinking for complex problem-solving. Use when the user says 'use ultrathink', 'ultrathink', or when tackling problems that require careful step-by-step reasoning, planning, hypothesis generation, or multi-step analysis.",
    "developerName": "Alberto Leal",
    "category": "Productivity",
    "capabilities": [
      "Skills"
    ],
    "defaultPrompt": [
      "Use $ultrathink for this task."
    ]
  },
  "repository": "https://github.com/dashed/claude-marketplace/tree/master/plugins/ultrathink",
  "skills": "./skills/"
}

For maintainers

If you maintain this plugin, link to this source-backed listing from your README so users can review its manifest and indexed components.

[ultrathink on Agent Plugins Marketplace](https://pluginsmp.com/plugins/ultrathink)