Codex App-Server Runtime
Codex App Server Runtime Hermes can optionally hand and turns to the Codex CLI app server instead of running its own tool loop. When enabled, terminal commands,
Hermes can optionally hand and turns to the Codex CLI app-server instead of running its own tool loop. When enabled, terminal commands, file edits, sandboxing, and MCP tool calls all execute inside Codex's runtime — Hermes becomes the shell around it (sessions DB, slash commands, gateway, memory and skill review). This is opt-in only. …
What this page covers
- Why
- What tools the model actually has
- 1. Codex's built-in toolset (always on)
- 2. Native Codex plugins (auto-migrated from your codex plugin install)
- 3. Hermes tool callback (MCP server, registered in ~/.codex/config.toml)
- What's NOT available on this runtime
- Workflow features (/goal, kanban, cron)
- /goal (the Ralph loop)
- Kanban (multi-agent worktree dispatch)
- Cron jobs
- Trade-offs
- Prerequisites
- Enabling
- Self-improvement loop (memory + skill nudges)
- How approvals work
- Permission profiles
- Auxiliary tasks and ChatGPT subscription token cost
- Editing ~/.codex/config.toml safely
- Multi-profile / multi-tenant setups
- HOME environment variable passthrough
- MCP server migration
- Native Codex plugin migration
- Hermes tool callback (the new MCP server)
- Disabling
- Limitations
- Architecture
Section outline mirrored from the official Hermes Agent documentation. Follow any heading to read the complete text on the source site.
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