Delegate sprint-status to a haiku subagent (sprint-plan pattern) so
intermediate artifacts (sweep JSON, template read, PR list) stay out
of the main context window. Trim sweep JSON output by removing unused
fields (ok, sprint.status, priority, ticket_id) and shortening issue
detail strings. Condense output template by moving rendering rules
into SKILL.md and simplifying the bookkeeping table to two columns.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>