15.9.0 (2026-05-14) Features agents: backfill TOOL spans for external tool returns in agent wrapper (#13185) (4b221b9) Bug Fixes agent: clarify PXI remote trace sharing consent (#13219) (f5da114) handle invalid GraphQL node ids (#13210) (35c8f3d) Documentation skills: weekly audit — 2026-05-13 (#13214) (8349361)