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

doc.go

@@ -27,9 +27,9 @@ package fejkdata
 //   - named pick — the draw a token such as {/person as p} binds to a name, drawn
 //     on its first read and kept while its scope renders: `nameBinding`,
 //     `namedPick`, `pickFrame`.
+//   - level, pick key, addressed key — `pickKey`.
 //   - memo — what a named pick keeps its draws in, the variant drawn at each level
 //     and the value each path read: `drawMemo`.
-//   - level, pick key, addressed key — `pickKey`.
 //   - pin — fixing which row of a table one path, or one named pick, uses:
 //     `pinSet`, `namedPick.pins`, `table.followStep`.
 //   - link — a table's tie to its parent table, each row to its parent row: