yoi/work-items/closed/20260531-003743-codex-gpt55-effective-context-window/resolution.md

Updated the builtin codex-oauth/gpt-5.5 entry so context_window = 272000 directly represents the effective Codex OAuth / ChatGPT backend route limit, with a catalog comment explaining that generic OpenAI docs advertise 1.05M. Removed catalog-level max_context_window from that entry while preserving inline/config max_context_window support. External review approved and validation passed.