pleme-io/carveMonolithic-branch → ticket-aligned stacked-PR primitive. Plan-centric YAML, BLAKE3-attested backup tags, tree-hash gate, cross-cutting commit splits, per-team JIRA policy via .carve.toml. Pre-PR sibling of vitrine. Theory in theory/CARVE.md, skill in blackmatter-claude/skills/carve/SKILL.md.