Use shared formatter target choices

docs/prompt-architecture-improvement-plan.md

@@ -89,9 +89,10 @@ Formatter target handling now has one home:
 - `formatter_target.py`
 
 It owns route-neutral target normalization for `auto`, `single`, `softcore`,
-and `hardcore`, including pair-side semantics. Single-output formatters select
-the softcore side for pair `auto`/`single` targets, while caption pair routing
-can still include both sides for combined training captions.
+and `hardcore`, including node choice lists and pair-side semantics.
+Single-output formatters select the softcore side for pair `auto`/`single`
+targets, while caption pair routing can still include both sides for combined
+training captions.
 
 Shared hardcore phrase cleanup now has one home: