Tiny helper command for ad-hoc multi-session flows that don't run through
/ultraexecute-local. Writes .session-state.local.json so /ultracontinue
can resume in a fresh chat. Required args (next-brief-path, next-label) —
no inline prompt, headless-safe. Validates via session-state-validator
and prints the same 3-line narration that /ultracontinue Phase 3 uses
(SC-8 cross-project consistency).
Step 9 of /ultracontinue v3.3.0. README/CLAUDE updates land in Step 11.
