diff --git a/docs/comprehension-history.md b/docs/comprehension-history.md
index a76056b..9e99a2c 100644
--- a/docs/comprehension-history.md
+++ b/docs/comprehension-history.md
@@ -20,3 +20,24 @@ Inherited architect, decided by:
 - `pick.go:9` `pickKey`: the 3am path for a named pick now ends in one file, with its worked example
 - `render.go:155` `readField`: `keptInPick` holds its own nil and reference checks
 - `path.go:72` `compiledPath`: the field no longer reuses the vocabulary word level
+
+## 2026-10-09T09:24:31Z, PR #190 at 65a32db, against ee4b40b
+
+Ruling: better
+
+| Seat | Vote |
+|---|---|
+| Mid A | better |
+| Inherited architect | better |
+
+Mid A, decided by:
+
+- `pick.go:9` `pickKey`: the definitions sit on the type, beside the functions that build and read the keys
+- `datatype.go:217` `columnRead`: beside `itemDatatype` and `checkColumns`, which consume it
+- `node.go:70` `template.readsColumn`: names the four readers that change together
+
+Inherited architect, decided by:
+
+- `pick.go:9` `pickKey`: a pick-key bug needs one file, where it needed four and the vocabulary
+- `render.go:155` `readField`: one named predicate, `keptInPick`, states the keep rule
+- `path.go:72` `compiledPath`: `headSpans` is the costliest new read in the diff