Heroku Monorepo Workspace Buildpack

Drop-in replacement for lstoll/heroku-buildpack-monorepo that preserves Yarn workspace infrastructure.

What it does

1. Copies APP_BASE subdirectory to the build root (same as the original monorepo buildpack)
2. Preserves packages/, yarn.lock, .yarnrc.yml, and .yarn/ from the repo root
3. Patches the root package.json with workspaces and packageManager fields so Heroku's Node.js buildpack uses Yarn 4 and resolves workspace:* dependencies

Setup

# Replace the existing monorepo buildpack (position 1)
heroku buildpacks:set https://github.com/numeroai/heroku-buildpack-monorepo-workspace -i 1 -a <app-name>

# Ensure APP_BASE is set
heroku config:set APP_BASE=numero_server -a <app-name>

Required config vars

• APP_BASE — the subdirectory containing the app (e.g., numero_server)
• NPM_AUTH_TOKEN — GitHub Packages auth token (for @numeroai scoped packages, if fetching from registry)