Stage Chat Codex 0.2.0

Options::$serviceTier accepts fast or null. Fast requests the CLI feature and priority tier independently of reasoning effort. Omitting the option preserves the prior execution profile. Invalid tiers fail locally; provider rejection never triggers a model or tier fallback. The contract returns answer text without provider-confirmed model or served-tier metadata.

This Release records the existing immutable tag at f8ce0e124ce7594e627ee916937b620db29d9259; no tag or source history has been moved. It is a historical version. For new installations, use 0.2.1 and its current README, contribution guide, and operational limits.

Current public distribution and native checks are recorded on the 0.2.1 Release. This historical Release does not claim a new paid provider run or a separate fresh validation of this older checkout.