mainbranch 0.1.1

Main Branch engine umbrella - scaffolds, validates, and graphs business-as-files repos. Built for Claude Code.

mainbranch (mb)

Engine umbrella for Main Branch — scaffolds, validates, and graphs business-as-files repos.

This package is the Python entry point. Skills, playbooks, educational content, and consumer-repo templates ship as bundled package data. The actual day-to-day "do work" surfaces are Claude Code skills (markdown), invoked from inside Claude Code.

The source tree keeps the engine payload in one place: repo-root .claude/. During sdist/wheel builds, setup.py copies that tree into mb/_engine/.claude/ inside the build artifact so installed wheels can resolve skills, playbooks, reference files, lenses, and educational prompts without a source checkout.

Install

pipx install mainbranch

That puts mb on your PATH. Verify:

mb --version

Subcommands (v0.1)

Command	What it does
mb init	Scaffold a new business repo (six folders, CLAUDE.md, CODEOWNERS, git init) and wire bundled skills for Claude Code. One question only: business name.
mb doctor	Diagnostic. Checks Claude Code, gh auth, network, librsvg, skill wiring, and package freshness. Warns on cloud-backed finance paths and offers educational triage.
mb validate	Frontmatter shape check across decisions/, core/offers/, research/, log/, campaigns/, documents/. Exit 1 on any fail.
mb graph	Walk linked_research / linked_decisions / supersedes; emit Graphviz DOT to stdout. --open shells to dot + open.
mb think <topic>	Print the /think skill invocation hint for Claude Code (or run inside a session).
mb resolve <key>	Resolve a reference path through the OSS / paid layered lookup.
mb skill path <name>	Print the on-disk path to a bundled skill.
mb skill link --repo <path>	Wire or repair Claude Code skill discovery for a business repo.
mb educational <topic>	Print an educational triage file. Powers mb doctor's "tell me more" prompts.

Status

v0.1 is Built for Claude Code only. Cross-agent compatibility is a v0.2+ commitment. The schema is v1 and will evolve. The engine decision lives at decisions/2026-04-29-mb-vip-v0-1-0-master.md; the business-side master plan is tracked in noontide-co/projects#119.

License

MIT.