Agent Plugins Marketplace
← All plugins

overlay-must-not-win

v9.9.9

Portable adapter fixture. Includes 1 skill and 1 MCP server.

CodexAgent Plugins1 Skill1 MCP serverstdio

5 GitHub starsUpdated 1 hour ago

Directory evidence

Runtimes
Codex and Agent Plugins
Parsed components
2 skill or MCP entries
Source updated
Oct 2, 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 overlay-must-not-win for Codex

Installs for the current user
codex plugin marketplace add IchenDEV/agent-plugin-mkt
codex plugin marketplace upgrade agent-plugin-marketplace
codex plugin add overlay-must-not-win@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/shaktsin/umcode

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

Plugin files

internal/plugins/testdata/portable/
├── .codex-plugin/plugin.json
├── plugin.json
├── skills/greet/SKILL.md
└── .mcp.json

Included Skills1

greetskills/greet/SKILL.md

Return a greeting.

MCP servers1

echostdio
command
echo-server
args
--stdio

Plugin manifests2

internal/plugins/testdata/portable/.codex-plugin/plugin.json
{
  "name": "overlay-must-not-win",
  "version": "9.9.9",
  "hooks": "./hooks/hooks.json"
}
internal/plugins/testdata/portable/plugin.json
{
  "$schema": "https://agent-plugins.org/schemas/1.0.0/plugin.schema.json",
  "name": "sample-plugin",
  "version": "1.0.0",
  "description": "Portable adapter fixture",
  "extensions": {
    "com.openai": {
      "hooks": "./hooks/hooks.json"
    }
  }
}

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.

[overlay-must-not-win on Agent Plugins Marketplace](https://pluginsmp.com/plugins/overlay-must-not-win)