sprint-distilllisted

# sprint-distill Turns a sprint's worth of merged work into `knowledge/` updates and `bigin-skills` convention updates — proposal-first, nothing writes until you approve it. Classifies every candidate learning as WHAT/WHY (→ `knowledge/`), HOW-we-work (→ `bigin-skills`), or neither (dropped, but reported). Never both. Not this skill: a single PR, a single change, or a one-off code review — use `/code-review` or `/review`. This one only operates on a sprint-scale date range. **Distillation compresses, never just appends.** Net line delta for `CLAUDE.md` and `.claude/rules/` should be ≤0 across a sprint unless there is explicit budget headroom. Every addition must name what it replaces or compresses. --- ## Phase 0: Scope Confirmation **Anti-trigger check first.** If the request is actually about one PR, one commit, or one change — not a sprint-scale range — stop and point to `/code-review` or `/review` instead. Do not proceed. **Determine `SPRINT_START`:** 1. Check whether `knowledge/` exists in this repo. - **Missing entirely** → this repo hasn't opted into the Knowledge Bundle. Ask: ``` No knowledge/ bundle found in this repo. Options: 1. skills-only — distill this sprint's HOW-we-work learnings into bigin-skills only; skip knowledge/ classification. I'll ask you for a start date. 2. bootstrap — set up the Knowledge Bundle first (via bigin-harness-setup), then re-run sprint-distill ``` Store `KB_MODE = skills-only` or