9a609aecc7
M2 (per-thread runtime context + concurrency safety) fully closed: spec1c58055(grounding-check PASS 9/9) -> planb3388c8(Boss-corrected) -> iterc9a84b3(PARTIAL 4/9 + Boss spec-defect repair) +fbeeade(DONE 5-9) -> auditad88dec(CLEAN-after-tidy; bench exit 1 causally exonerated, NO ratify) -> tidya80d495(doc-honesty lockstep rename). No fieldtest (zero authoring-surface change). Sanitiser-verified coherent stop. WhatsNew entry mirrors the done-state notify text verbatim. Next: Embedding ABI — M3 (a new milestone, no spec — a /boss new-milestone bounce-back).