Phase 7: add enqueueDeferredReinjectFromCompact — queue plan on session_compact without sendUserMessage.

Defer delivery stores planned skill names in pendingReinject for injection on the next before_agent_start, avoiding races with pi-auto-compact follow-ups.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/reinject.ts

@@ -37,3 +37,20 @@ export function planReinject(
 		registeredSkillNames(registeredSkills),
 	);
 }
+
+/** Defer path on session_compact: queue planned skills without sendUserMessage (SPEC §6.5.1, §16.2). */
+export function enqueueDeferredReinjectFromCompact(
+	state: ExtensionState,
+	settings: SkillReinjectSettings,
+	ctx: ExtensionContext,
+	compactionEvent: SessionCompactEvent,
+	registeredSkills: readonly Pick<Skill, "name">[],
+): void {
+	state.pendingReinject = planReinject(
+		state,
+		settings,
+		ctx,
+		compactionEvent,
+		registeredSkills,
+	);
+}