2.21.0 (2026-02-13) Full Changelog: v2.20.0...v2.21.0 Features api: container network_policy and skills (d19de2e) Bug Fixes structured outputs: resolve memory leak in parse methods (#2860) (6dcbe21) webhooks: preserve method visibility for compatibility checks (44a8936) Chores internal: fix lint error on Python 3.14 (534f215) Documentation split `api.md` by standalone resources (96e41b3) update comment (63def23)