Title the stem decision by its rule, and point doc.go's whole at surveyAt

AGENTS.md

@@ -65,7 +65,7 @@ In [docs/decisions.md](docs/decisions.md):
 - A column of one reference alone is the column it reads
 - A typed column's calc is refused unless proven
 - `Column` carries text, not a Go value
-- `hold` names what a draw is kept in, `readValue` what a read drew
+- A unit takes the stem of what it is, and a file the stem of the units it holds
 - One name, one meaning
 - The package stays flat
 - The performance gate asserts allocations, not wall-clock time

doc.go

@@ -33,8 +33,8 @@ package fejkdata
 //   - family — a table and every table reaching it through a chain of
 //     `table.parentT`, named by the root that chain ends at: `table.familyRoot`.
 //   - whole — a read of a table with no selector and no descent, {/city}, landing on
-//     the `table` itself: it draws a row apart from every pin, so the fences keep the rows
-//     its cells stand in as `surveyAt.wholePins`, beside `surveyAt.wholeTable`.
+//     the `table` itself, so it draws a row apart from every pin:
+//     `surveyAt.wholeTable`, `surveyAt.wholePins`.
 //   - fence — a load-time check, so rendering a compiled tree cannot fail: `New`
 //     runs them over the data set, `NewTemplate` and `FakeStruct` over what those
 //     compile. The draw fences are `heldCheck`, `drawFence` and `checkFamilies`.

docs/decisions.md

@@ -302,10 +302,10 @@ in.
 `Value` is the rendered string beside `DataType` and `Null`, which each serializer
 writes as the load check proved it; a `Value any` would hand every caller a type switch.
 
-## `hold` names what a draw is kept in, `readValue` what a read drew
+## A unit takes the stem of what it is, and a file the stem of the units it holds
 
-Goal 2 wants a name to reach one unit, so a unit takes the stem of what it is, and a
-file the stem of the units it holds.
+Goal 2 wants a name to reach one unit: `hold` is what a draw is kept in, `readValue` what
+a read drew.
 
 ## One name, one meaning
 

todo.md

@@ -312,6 +312,7 @@ because pairing a street with its exact postnummer rewrites shipped rows.
 - Delete `doc.go`'s "The draw fences are …" sentence: it names a function, a type and
   a helper reached only through `readSurvey.check`, and misses `checkDrawGroup`,
   `checkOwnFamily` and `checkColumnDraws`; the README's Layout indexes the fences by file.
+  Say "fences" in the `pin` entry then, which names the draw fences too.
 - Cut the README's Layout block to the lines that say what a file name cannot:
   `calc.go`, `doc.go` and `cmd/fejkdata/` restate their names.
 - Cut `AGENTS.md` to the rules only it states: the round procedure stands word for word