build-aiui.sh (mid-write) + aiui/.gitignore, committed verbatim and UNVERIFIED
— not a task completion. The 13-09 executor will be killed by the reboot; its
continuation should read this checkpoint, judge it against the plan's
must_haves, and reset --soft / build forward as appropriate (same recovery
pattern as the 6ba52b22/13b576da broken-pipe rescue at the start of this phase).
Already committed by 13-09 before this: 6ac0ebbf (CSP sandbox task).
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
