Codex CLI resolves plugin paths relative to the home directory (~), not relative to marketplace.json. The previous path "./everything-claude-code" resolved to ~/everything-claude-code (non-existent), causing "plugin/read failed" error in the TUI.
- Add .codex-plugin/plugin.json — Codex-native plugin manifest with skills reference and MCP server config pointer - Add .codex-plugin/.mcp.json — standalone MCP server config bundle (github, context7, exa, memory, playwright, sequential-thinking) - Add .codex-plugin/README.md — installation guide and server reference - Fix .claude-plugin/plugin.json — add missing agents[] (28 explicit file paths per validator rules), skills[], and commands[] arrays; remove hooks field (auto-loaded by Claude Code v2.1+ convention) - Add tests/plugin-manifest.test.js — 16 CI tests enforcing PLUGIN_SCHEMA_NOTES.md rules (no hooks, arrays throughout, explicit agent paths, version required, .mcp.json structural checks) - Update package.json: add .codex-plugin/ to files[], add plugin manifest test to npm test chain Refs: .claude-plugin/PLUGIN_SCHEMA_NOTES.md