Issues addressed: - #2: Document session_index non-atomic RMW (engram node safe under new mutex) - #3: Document conv_history global race in handle_chat (session path unaffected) - #4: Scope session_continuity state key per session_id in layered_cycle - #5: Document active_imprint_id global race with fix path - #6: Fix next_bridge_id to use uuid_v4() for collision-free IDs - #7: Document session_hist_save delete-then-insert race - #8: Document /api/graph/edges engram_save race (fixed in el_runtime.c) - #10: Document agentic_conv_history global race in awareness loop Issues #1 (engram_global mutex) and #8 (atomic engram_save write-to-temp+rename) are fully fixed in el_runtime.c (committed to foundation/el repo separately). Issue #9 skipped — already fixed in PR #31.