Status: IN
Write-time operations eliminate coordination needs across two complementary dimensions: deterministic identity derivation (sorted user-pairs, first-message IDs) removes central ID assignment, and reference-based routing (post IDs, inbox pointers) removes data-payload coordination — together, writes commit binding decisions using only local computation and lightweight references, requiring neither a coordinator nor full data payloads.
Two independent coordination-elimination strategies (identity derivation, reference routing) jointly make writes coordination-free
Depends on (SL): identity-derivation-trades-validation-for-simplicity, write-time-decisions-are-lightweight-but-binding