InfoLang Inc. Correspondences API
WHETHER TWO KEYS NAME ONE FACT — `il-correspondence` pointed at Phase 1's subject keys. Subject-key drift (two agents writing `fact:convoy-departure` and `fact:convoy-departs`) silently splits one fact into two folds with nothing looking wrong; this surface makes the split visible and repairable WITHOUT rewriting a log. The gateway can PROPOSE that two keys correspond; only an operator credential can `identify` them as one thing, and even that is forward-only. Recall can annotate every subjected hit (`correspondence: true`) with a `split_risk` flag — and never unions the two subjects' beliefs. All three lanes, gated on `coord:read` / `coord:write`; `501` where the upstream kernel verbs are not compiled in.