explain.kz — the `explain` COMMAND for Koru The SQL-`EXPLAIN` move, lifted to the compiler: a library optionally ships a comptime *explainer* that reads the program AST and explains how the library interpreted YOUR program's use of ITS OWN facilities — not generic docs, but "given this config and these call sites, here is what I decided about THIS code." Report rows carry `at` witness hashes — `koruc <file> at <hash>` resolves them (see site_hash.zig; rendering lives in the `wit` part). koruc main.k explain # human-readable (text) koruc main.k explain json # machine-readable koruc main.k explain html # rich page The `explain` command is the ONLY caller of explainers — runs INSTEAD of compilation on the freshly-parsed, pre-analysis AST (closest to source).