Cross-runtime plugin demonstrator — ships one strict-mode SKILL.md (agents-md-author) installable in both Anthropic Claude Code and OpenAI Codex CLI from the same source. Reference implementation for the dual-manifest authoring pattern (.claude-plugin/ + .codex-plugin/).
Installation
1
Add the marketplace
/plugin marketplace add anton-abyzov/vskill
2
Install plugins
/plugin
Run these commands in Claude Code to add this plugin to your environment. The marketplace must be added before you can install its plugins.