jj vs grok-build
jj and grok-build share 7 technologies: Tokio, crossterm, ansi-to-tui, Ratatui, tracing, tracing-chrome, and tracing-subscriber. Both are written in Rust.
LinkedInWhat they share and what sets them apart
jj-vcs
jj
A Git-compatible VCS that is both simple and powerful
Rust32.4kRead on November 7, 2026, at commit 7fdb0d1What is jj built with?Only in jj
- clru
sapling-renderdag
rpassword
In common
xai-org
grok-build
SpaceXAI's coding agent harness and TUI. Fullscreen, mouse interactive, extensible.
Rust27.7kRead on November 8, 2026, at commit 2bdd1d6What is grok-build built with?Only in grok-build
- axum
aws-sdk-s3
rusqlite
- SQLite
- moka
sqlite-vec
OpenAI- Sentry
- tower
- axum-server
- anstyle
- fontdb
alacritty_terminal
- ratatui-core
- indicatif
- tiny-skia
- jsonwebtoken
- oauth2
- hmac
- async-openai
agent-client-protocol
- rmcp
- bm25
- kamadak-exif
- image
minijinja
- pulldown-cmark
- infer
- linkify
- zip
- htmd
html-escape
- pdf_oxide
- quick-xml
- resvg
- scraper
- schemars
- jsonschema
- prometheus
- OpenTelemetry
tracing-appender
- tracing-opentelemetry
- log
opentelemetry-otlp
- fastrace-opentelemetry
- env_logger
- prometheus-parse
Side by side
jjgrok-build
SizeLines written by people and agents, without generated ones; code files, without tests.
jj284,964 lines written313 code files
grok-build1,982,128 lines written2,511 code files
Who writes itA commit counts as AI's when it carries its signature: a Co-Authored-By line, its author name or the merge of its branch.
jj0.1% of its commits signed by AIWith Gemini CLI and Claude Code
grok-build0% of its commits signed by AI
ActivityFrom GitHub and its history, on the day SeeRepo read it.
jjLast push November 7, 202612,142 commits32,392 stars
grok-buildLast push September 29, 202651 commits27,712 stars
TestsThe files that test the code, and the share of code files a test imports.
jj128 test files
grok-build1,077 test files52.1% of its code files have a test that imports them
Frequently asked questions
Which is bigger, jj or grok-build?
grok-build, with 1,982,128 lines written; jj has 284,964.
The proof: xai-org/grok-build's code at commit 2bdd1d6
Which has more GitHub stars, jj or grok-build?
jj, with 32,392 stars; grok-build has 27,712.
The proof: jj-vcs/jj on GitHub
Which has more tests, jj or grok-build?
grok-build, with 1,077 test files; jj has 128.
The proof: xai-org/grok-build's code at commit 2bdd1d6
Which was updated more recently, jj or grok-build?
jj: its last push was on November 7, 2026, and grok-build's on September 29, 2026.
The proof: jj-vcs/jj's commits on GitHub
Which has more commits signed by AI, jj or grok-build?
jj: an AI signed 0.1% of its commits, with Gemini CLI and Claude Code.
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