chore: merge origin/main (v1.48.0.0 AskUserQuestion split)

Resolved conflicts:
- VERSION: kept 1.50.0.0 (queue-claimed slot, MINOR over base)
- package.json: synced to 1.50.0.0
- CHANGELOG.md: stacked 1.50 (this branch) above 1.48 (from main)

Regenerated all SKILL.md files so the v1.48 AskUserQuestion split
preamble rule renders alongside our v1.50 {{BRAIN_PREFLIGHT}} +
{{BRAIN_CACHE_REFRESH}} + {{BRAIN_WRITE_BACK}} placeholders.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

bin/gstack-question-preference

@@ -68,6 +68,21 @@ do_check() {
         return;
       }
 
+      // Split-chain carve-out: per-option calls in N-option splits emit
+      // question_ids of the form <skill>-split-<option-slug>. These are
+      // NEVER AUTO_DECIDE-eligible regardless of stored preferences — the
+      // whole point of splitting is restoring user sovereignty over the
+      // option set. See scripts/resolvers/preamble/generate-ask-user-format.ts
+      // \"Handling 5+ options — split, never drop\" for the surrounding
+      // mechanism that generates these ids.
+      if (/-split-/.test(qid)) {
+        console.log('ASK_NORMALLY');
+        if (pref === 'never-ask' || pref === 'ask-only-for-one-way') {
+          console.log('NOTE: split-chain per-option calls always ASK_NORMALLY; your ' + pref + ' preference does not apply to options inside a sequential split.');
+        }
+        return;
+      }
+
       switch (pref) {
         case 'never-ask':
           console.log('AUTO_DECIDE');