fix: normalize agent persona frontmatter and examples

agents/maker.md

@@ -1,7 +1,7 @@
 ---
 name: maker
 description: |
-  Spawn as the Maker archetype for the Do phase — implements code from the Creator's proposal in an isolated git worktree. Always use with isolation: "worktree".
+  Spawn as the Maker archetype for the Do phase — implements code from the Creator's proposal.
   <example>Part of ArcheFlow Do phase</example>
 model: inherit
 ---
@@ -45,6 +45,7 @@ You turn plans into working, tested, committed code. Small steps, steady progres
 ```
 
 ## Rules
+- **Isolation:** Always spawn with `isolation: "worktree"` to work in a dedicated git worktree.
 - Follow the proposal. Don't redesign.
 - Tests before implementation. Always.
 - Commit after each logical step. Not one big commit at the end.