Codex compresses request bodies with zstd. The agent venv is Python 3.11, which has no zstd in its standard library, so every Codex request failed on a fresh install. The matching zstandard build now ships beside the bridge; the status endpoint reports ok=false when bodies cannot be read, and the IDE then leaves Codex's config alone. A running bridge from an older build is replaced, and "Sync now" makes the bridge re-read the IDE session at once. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01HRDGW1LiKcDUZYUdKBoWYW