Host features

Created: 2026-10-05 Last updated: 2026-10-21

The Claude Code and Codex features the concise manifests use, as the host docs described them on 2026-10-05 (2026-10-08 for the NotebookEdit, PowerShell, MCP, task, question, and PostToolUse rows), and the omp features the omp extension uses, as of 2026-10-07. Read the sources again before you change a manifest or omp/extension.mjs.

Used by the manifests
The hooks docs say a handler defined in more than one settings file runs once.
Codex MCP server
The Codex plugin docs describe bundled MCP servers and plugin-scoped policy under plugins.<plugin>.mcp_servers.<server>, with a remote HTTP server as the example.
omp
omp (oh-my-pi) installs the plugin from the Claude Code marketplace catalog, .claude-plugin/marketplace.json.
Left out
Sources