Ultra Research (effort=high)

GREP's most thorough tier. Takes up to 1 hour. Cannot be block-waited (Claude Code's bash tool caps at 10 minutes), so this skill uses the /loop feature to schedule an automatic recurring status check until the job completes.

CRITICAL: Tell the user up front

Before submitting, tell the user exactly this:

"Ultra-deep research can take anywhere from 10 minutes to a full hour. I'll submit the job now and set up a recurring check every 5 minutes — results will appear automatically when ready. You can keep working on other things while it runs."

Set expectations clearly.

When to use this skill vs the others