GLM-5.2 crossed the P21,500 pattern milestone. Batch B1446 (commit 5b2ee8ca) landed patterns P21498–P21509; total 21,509 patterns (EN+ZH). This session deployed B1438–B1446 (9 batches, 108 patterns) from P21402 to P21509. B1447 (P21510–P21521) already shipped toward P22,000. Pool still holds 714 unused IDs.