# folke/ultra-runner

🏃⛰ Ultra fast monorepo script runner and build tool

Repository: https://github.com/folke/ultra-runner
Canonical: https://ross.abutalabs.com/products/ultra-runner
Homepage: https://www.npmjs.com/package/ultra-runner
Language: TypeScript
License: Apache-2.0
License Family: permissive
Topics: concurrent, parallel, lerna, pnpm, yarn-workspaces, monorepo, npm, build, build-tool, script-runn, script-runner, npm-scripts, hacktoberfest
Last push: 2026-08-26T15:50:04+00:00

## Health v2 (maintenance only)
Score: 67/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 8, longevity 100
- inputs: {"age_days": 2415, "days_push": 7, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1246, forks 39 (observed 2026-08-28T04:04:07.132522+00:00)

## What it is
Ultra Runner is a fast monorepo script runner and build tool for JavaScript/TypeScript projects. It detects existing lerna, yarn, npm, and pnpm workspaces, runs scripts in parallel with dependency awareness, and only rebuilds packages when files change.

## Use cases
- run npm scripts across a monorepo in parallel
- incrementally rebuild only changed packages in a workspace
- replace lerna or yarn workspaces script running with something faster
- speed up npm run, yarn, and npx command execution
- run a script recursively in all packages that define it
- monitor and zoom output of concurrent build commands

## When to choose
- you have a lerna, yarn, npm, or pnpm monorepo and want faster builds
- you want zero-config, non-intrusive parallel script execution
- you need dependency-aware concurrent builds with incremental rebuilds

## When to avoid
- you need a full monorepo manager with publishing and versioning like lerna or nx
- your project is a single package with no workspaces
- you rely on tooling deeply integrated with a specific package manager's runner

## Facets
- artifact type: cli-tool
- maturity: active
- function: build-tool, cli, developer-tools
- domain: developer-tools
- platform: cli, cross-platform
- tags: monorepo, npm-scripts, task-runner, parallel-execution, workspaces, incremental-builds, command-line, automation, nodejs

## Member repositories
- folke/ultra-runner (main) score 67

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:07.132522+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T05:08:03.175686+00:00, confidence not recorded.
  - readme: https://github.com/folke/ultra-runner (fetched 2026-08-28T04:04:07.132522+00:00, sha 165855fb6ccf)
  - registry_npm: https://registry.npmjs.org/ultra-runner (fetched 2026-08-29T12:19:30.263787+00:00, sha 40135f3bbb9d)
- Data as of 2026-08-30T08:39:29.467469+00:00.