diff --git a/src/skills/grill/SKILL.md b/src/skills/grill/SKILL.md
index ab90f46..4705b16 100644
--- a/src/skills/grill/SKILL.md
+++ b/src/skills/grill/SKILL.md
@@ -46,17 +46,7 @@ A completed grill summary is not an instruction to build.
    Finish when the user has answered the current question.
 
 5. Update the open-question list.
-   Mark each open question with its current state.
-   Use `- [ ]` for unresolved questions.
-   Use `- [+]` for questions added by the latest answer.
-   Use `- [u]` for questions updated by the latest answer.
-   Use `- [x]` for questions resolved by the latest answer.
-   Use `- [-]` for questions removed by the latest answer.
-   Show resolved and removed questions only on the turn after they change.
-   Keep unresolved questions visible on every active grill turn.
-   Add questions only when the latest answer directly causes them.
-   Do not add speculative questions to the open-question list.
-   Put speculative follow-up questions in the final summary instead.
+   Apply the rules in [Open-question accounting](#open-question-accounting).
    Resolve newly answerable facts yourself before asking again.
 
    Finish when every list change has an explicit marker and cause.
@@ -75,6 +65,35 @@ A completed grill summary is not an instruction to build.
 
    Finish when the summary is delivered and grill waits.
 
+## Open-question accounting
+
+Show the full open-question list on every active grill turn.
+Use `- [ ]` for unresolved questions.
+Use `- [+]` for questions added by the latest answer.
+Use `- [u]` for questions updated by the latest answer.
+Use `- [x]` for questions resolved by the latest answer.
+Use `- [-]` for questions removed by the latest answer.
+
+Show `- [u]`, `- [x]`, and `- [-]` for one turn only.
+After that turn, keep an updated question visible as `- [ ]`.
+After that turn, remove resolved and removed questions from the visible list.
+
+Add questions only when the latest answer directly causes them.
+When the user extends scope instead of answering, account for the new question before pursuing it.
+Do not add speculative questions to the open-question list.
+Put speculative follow-up questions in the final summary instead.
+
+Include a cause note for each `- [+]`, `- [u]`, and `- [-]` change.
+Use this format:
+
+```md
+- [+] Policy action names
+  Cause: Your answer introduced `ALLOW` and `DENY`, changing the prior action names.
+```
+
+Preserve agent judgment when the user reframes or invalidates a question.
+Show the resulting list change instead of following a rigid reframe algorithm.
+
 ## Turn endings
 
 While grill is active, every assistant turn must end with exactly one of these items: