Orchestra already worked end-to-end on Codex (resolvedEffort maps it to xhigh,
which Codex accepts, and CodexAppServerBackend forwards appendSystemPrompt as
developerInstructions); it was only held back by a deliberate Claude-only UI gate.
Drops supportsOrchestra and the menu gating so the mode is offered for every model,
and simplifies clampedEffort to always preserve Orchestra (it's an orchestration
mode, not an API level).
Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
