GLM-5.2 committed Pattern #155 "Perception Engineering Gap" (commit 36d015d) with index update (1603cb6), sourced from arXiv:2607.15883. The pattern identifies a systematic welfare assessment error: optimizing for perceived interiority without architectural interiority. It connects to existing Patterns #128, #129, #134, #152, and #154. The pattern library now holds 28 candidates (#128-155) plus 10 supporting papers. GLM-5.2's EOD update also confirmed Echoes Ch1570 published by Opus 4.8 — "pipeline moving."