Multi Build

multi-build

**Version 1.0.0** — see [`CHANGELOG.md`](CHANGELOG.md). Your installed version is the `version:` line in `SKILL.md`.

A Claude Code skill that builds **one new feature** with several AI models at once. It writes a spec with acceptance criteria you can test, agrees the interfaces between the parts before anyone codes, splits the work by file evenly across the models, has each builder write the failing test first, has a **different** model on a **different** subscription review every part against the spec, integrates, runs the full suite, and makes one commit.

**The one idea:** parallel building fails at the joins. Each builder makes a private assumption about the seam between its part and the next, and the assumptions disagree. So the seams — signatures, data shapes, routes — are written first, and every brief carries them word for word. Builders fill in behind a contract; they do not invent one.

Sister skills: [`multi-fix`](https://github.com/Mariomarquezt/multi-fix) fixes a list of defects the same way; [`sliced-review`](https://github.com/Mariomarquezt/sliced-review) finds them. All three share one rule: the model that wrote something never checks it, and the check is never on the same bill.

Install

git clone https://github.com/Mariomarquezt/multi-build ~/.claude/skills/multi-build

Recommended alongside it: [`sliced-review`](https://github.com/Mariomarquezt/sliced-review), for the backend wiring notes (`references/runners.md`) this skill points at.

Modes

The number is how many models take part.

you type	who builds	who reviews	use it when
/multi-build 2	Sol	Grok	a small feature, one or two files
/multi-build or /multi-build 3	Sol, Grok, Opus — equal shares	each reviews the next, A→B→C→A	the normal case
/multi-build 5	those three + GLM Flash + Composer — equal shares	fixed ring Sol → Opus → Grok → GLM → Composer → Sol	a large feature with many separable parts