buzz vs cargo

buzz and cargo share 7 technologies: rusqlite, SQLite, hmac, pulldown-cmark, schemars, tracing, and tracing-subscriber. Both are written in Rust.

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What they share and what sets them apart

Side by side

SizeLines written by people and agents, without generated ones; code files, without tests.
buzz1,826,129 lines written3,453 code files
cargo351,287 lines written327 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.
buzz17.2% of its commits signed by AIWith Claude Code, Codex, Cursor, and Amp
cargo0% of its commits signed by AIWith Codex
ActivityFrom GitHub and its history, on the day SeeRepo read it.
buzzLast push November 6, 20263,348 commits36,778 stars
cargoLast push November 7, 202616,021 commits15,685 stars
TestsThe files that test the code, and the share of code files a test imports.
buzz1,760 test files44.8% of its code files have a test that imports them
cargo1,035 test files2.8% of its code files have a test that imports them

Frequently asked questions

Which is bigger, buzz or cargo?
buzz, with 1,826,129 lines written; cargo has 351,287.

The proof: block/buzz's code at commit 96af488

Which has more GitHub stars, buzz or cargo?
buzz, with 36,778 stars; cargo has 15,685.

The proof: block/buzz on GitHub

Which has more tests, buzz or cargo?
buzz, with 1,760 test files; cargo has 1,035.

The proof: block/buzz's code at commit 96af488

Which was updated more recently, buzz or cargo?
cargo: its last push was on November 7, 2026, and buzz's on November 6, 2026.

The proof: rust-lang/cargo's commits on GitHub

Which has more commits signed by AI, buzz or cargo?
buzz: an AI signed 17.2% of its commits, with Claude Code, Codex, Cursor, and Amp.

The proof: the commits each tool signed in block/buzz

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