b9356eb718
Add a third dev-cycle entry path: a specify skill that produces an approved spec from given sources (settled in-context discussion or an exhaustive issue) with review but no interview. Splits brainstorm's deciding half from its producing half — brainstorm becomes optional discovery, specify becomes the sole production gate before planner, mirroring the RED->GREEN split that keeps tdd/debug honest. specify bounces to brainstorm on an unresolved design fork, the same discipline tdd uses.