0.53.0

Highlights

• Fixing error 400 issues
• Improve sandboxing for Java

PRs

#5897 – codex: add developer instructions #5939 – app-server: remove serde(skip_serializing_if = "Option::is_none") annotations #3754 – docs: add missing period #5976 – hygiene: remove include_view_image_tool config #3987 – fix: update Seatbelt policy for Java on macOS #4905 – Windows Sandbox alpha version #5997 – build: bump Windows stack size to 8 MB #5986 – remove last-turn reasoning filtering #6005 – app-server: split API types into v1 and v2 #6002 – feat: add /exit slash-command alias for quit #6000 – rate-limit errors now return absolute time #4144 – docs: fix markdown list spacing in review_prompt.md #6007 – override verbosity for gpt-5-codex