Unified sprint script at db/connectors/sprint with 5 subcommands:
status, start, stop, start-work, prepare. Calls ticket CLI via
subprocess (no SQL duplication), auto-detects sprint from DB state
and team from git branch. Guards prevent activating unplanned
sprints. Updated start-sprint, plan-sprint, and ticket skills to
reference the new CLI. Added sprint CLI section to CLAUDE.md.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>