diff --git a/skills/brainstorm/SKILL.md b/skills/brainstorm/SKILL.md
index 4b77703..c655fa2 100644
--- a/skills/brainstorm/SKILL.md
+++ b/skills/brainstorm/SKILL.md
@@ -210,4 +210,10 @@ Hand off carries:
   criterion" — gate this skill applies during spec writing.
 - **Output target:** `skills/planner/SKILL.md` — only valid next
   skill.
-- **No private agents.** This skill is dialogue-driven.
+- **No private agents.** This skill is dialogue-driven. The Boss
+  MAY ad-hoc dispatch `skills/planner/agents/ailang-plan-recon.md`
+  during Step 1 when the milestone enters code territory the Boss
+  has not recently read; this is opt-in and not part of the standard
+  process. Rationale: brainstorm's recon phase is interwoven with
+  the user Q&A — see `docs/specs/2026-05-11-plan-recon-subagent.md`
+  for the full reasoning.