ab8dc1ec72
The RFC seated the exit approval on the approval seam because that was the only asking machinery in flight when it was written. ask_user_question has since merged (PR #108): the exit moment is a question, not a permission — the user-interaction seam gives the review options plus a free-text channel, so a keep-planning answer carries the user's feedback to the model verbatim, and an approval can later grow options. The gate no longer returns ask (that vocabulary stays free for genuine permission gating); the tool conducts the review inside its own execution and degrades to manual mode-toggling without a provider. The approval-seam shape moves to Alternatives considered with the reasoning. Consequences: the roadmap's hard prerequisite on the sandbox branch disappears (this stack bases on master), the recorded scenarios script elicitation answers instead of permission answers, and the ACP v2 session-mode-removal direction is recorded as an accepted migration risk.