docs(adr): say plainly that a formula line's category tag is an id and _measure is implicit (improvise-cq1q.1)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01VdfEGXA7aJ6ftMsCc9PJze
2026-10-09 09:20:20 -07:00
parent 8405f5c18b
commit ccc6751886
1 changed files with 2 additions and 0 deletions
@@ -419,6 +419,8 @@ Under the amendment the same two formulas are written:
  lists `- Tax(tax)`). So the line names the target by its item id, `tax`, and
  `(tax-1)` is the formula's own id. The display is not repeated, because a display
  lives in one place.
+- **The tag is always an id**, the target category's (`[customcat]`, never
+  `[CustomCat]`), and `_measure` is implicit: it is never written as a tag.
 - **So the loader can always tell the two apart**: with a tag the target is an item
  id; without one it is a measure's display.
 - **The expression is over ids**, spelled through `quote::quote_name`. A reference to