Sprint — focused 1-2 hour execution

A sprint has a whistle and a finish line. You walk in with a topic. You walk out with one of four states: SHIPPED, PAUSED, FAILED, or ABORTED_BY_USER. Only a fully approved run attempts ship; SHIPPED is recorded only after delivery succeeds. Other outcomes emit a checkpoint candidate to the host.

When to invoke

• 1-2 hour focused work on a specific topic
• "Let's ship X today" / "sprint on this"
• Coming out of grill --brief with an approved brief
• Bug fix that needs review + ship discipline (was commands/fix.md)
• Quick ship on a small change with --quick flag (was commands/quick.md)

When to skip

• Trivial 1-line change (just edit + commit)
• Multi-day project (use grill --brief first, then sprint per session)
• Pure planning / scoping (use grill --brief, not sprint)