Runtime Model

Gormes exposes several user surfaces, but they should converge on one runtime model:

• CLI flags and config resolve provider/model/runtime settings.
• The TUI and one-shot paths run local interactive or single-turn sessions.
• Gateway paths adapt channel messages into the shared runtime.
• Tools execute through a registry with channel-neutral results.
• Renderers translate runtime events into terminal or chat UX.

The docs should describe this shared boundary before introducing subsystem internals.