Answer prose round 1: the keep rule names what is kept and who decides, headSpans says what it counts, and compileStep and config.load stop restating

README.md

@@ -990,7 +990,7 @@ name.go         names: {x as n} bindings, the scopes they live in, the reads the
 namefence.go    the load fences over names
 pick.go         a render's named picks: each level's pick key, the frame each name scope renders in, the memo a pick keeps, and the reads kept under it
 env.go          renderEnv: what a render reads names and rows through, the stack of frames it renders in, and the frames a read opens and finds
-path.go         the dotted-path walks: the paths List advertises, the sub-paths every variant of a choice carries, proving a path reaches a node, and drawing it
+path.go         the dotted-path walks: the paths List advertises, the sub-paths every variant of a choice carries, proving a path reaches a node, and drawing the path
 render.go       Fake, the recursive renderer (choices, format strings, expansions) and the reads its tokens make
 record.go       records: Record, the JSON/CSV/SQL serializers, and their entry points
 struct.go       structs: FakeStruct, fake tags as one record's columns, and a field's Go type as its column's datatype