# facebook/sapling

A Scalable, User-Friendly Source Control System.

Repository: https://github.com/facebook/sapling
Canonical: https://ross.abutalabs.com/products/sapling
Homepage: https://sapling-scm.com
Language: Rust
License: GPL-2.0
License Family: copyleft
Last push: 2026-08-26T20:19:30+00:00

## Health v2 (maintenance only)
Score: 90/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 73, longevity 100
- inputs: {"age_days": 3772, "days_push": 7, "days_rel": 22, "gap_med": 124.5, "n_releases_24m": 5}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 6993, forks 394 (observed 2026-08-28T04:09:52.386874+00:00)

## What it is
Sapling SCM is a cross-platform, Git-compatible source control system from Meta, built in Rust, comprising the `sl` CLI, the Mononoke server, and the EdenFS virtual filesystem. It is designed for extreme scalability to monorepos with millions of files and commits while offering a user-friendly interface including an Interactive Smartlog web UI and VS Code integration.

## Use cases
- clone and work with existing Git repositories on GitHub
- manage commits in a massive monorepo with millions of files
- stack and iterate on commits without branch hassle
- visualize and interact with repository history via a web UI
- speed up checkouts in large repositories with a virtual filesystem

## When to choose
- you work in or with very large monorepos where Git performance degrades
- you want a friendlier UX for stacked commits and history navigation
- you want a Git-compatible client for GitHub workflows
- you want an interactive smartlog UI or VS Code integration

## When to avoid
- you need the server-side (Mononoke) or EdenFS components in production - they are not yet supported publicly
- your team is fully invested in standard Git tooling and ecosystem integrations
- you need a GPL-2.0-licensed tool in a context where that license is a problem

## Facets
- artifact type: application
- maturity: active
- function: version-control, cli, developer-tools
- domain: version-control, developer-tools
- platform: windows, cross-platform, cli
- tags: git-compatible, monorepo, mercurial-inspired, virtual-filesystem, stacked-commits, rust, command-line, linux, macos

## Member repositories
- facebook/sapling (main) score 90

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:09:52.386874+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 2026-08-29T17:41:06.869289+00:00, confidence not recorded.
  - readme: https://github.com/facebook/sapling (fetched 2026-08-28T04:09:52.386874+00:00, sha 534e8effc7cc)
  - homepage: https://sapling-scm.com (fetched 2026-08-29T08:36:46.081418+00:00, sha ac9d275d81b9)
  - site_page: https://sapling-scm.com/docs/introduction (fetched 2026-08-29T08:36:46.090700+00:00, sha 448c0706bdf3)
  - site_page: https://sapling-scm.com/docs/introduction/getting-started (fetched 2026-08-29T08:36:46.092986+00:00, sha d773eccd475f)
- Data as of 2026-08-30T08:39:29.467469+00:00.