By the numbers

A quantitative snapshot of the uv repository.

Data collected on 2026-04-30 from the main branch at commit 4d4f345cfe0309561bbe115e8e3677c502f6a67b.

Size

uv is a Rust workspace of ~70 crates, all in crates/. The Rust source dominates by line count; the rest is fixture data, scripts, and Markdown docs.

Metric	Count
Total commits since first commit (Oct 2023)	9,027
Tags published	272
Distinct authors (all-time)	544
.rs files under crates/	576
Total Rust LOC under crates/ (incl. tests/snapshots)	~473,597
*.toml files in the repo (Cargo + pyproject + fixtures)	130
Workspace members	70 directories under crates/ (one nightly-only crate excluded from the workspace)

The largest crates by source size:

Crate	On-disk size
uv (the binary, includes tests)	~13 MB
uv-python (incl. download metadata JSON)	~3.3 MB
uv-resolver	~1.5 MB
uv-client	~536 KB
uv-distribution-types	~492 KB
uv-pep508	~436 KB
uv-requirements-txt	~420 KB
uv-cli	~376 KB
uv-distribution	~364 KB
uv-trampoline-builder	~328 KB
uv-pep440	~296 KB
uv-workspace	~284 KB
uv-auth	~276 KB

xychart-beta horizontal
    title "Workspace crates by on-disk size (KB)"
    x-axis ["uv-python", "uv-resolver", "uv-client", "uv-distribution-types", "uv-pep508", "uv-requirements-txt", "uv-cli", "uv-distribution", "uv-trampoline-builder", "uv-pep440"]
    y-axis "KB" 0 --> 3500
    bar [3300, 1500, 536, 492, 436, 420, 376, 364, 328, 296]

The single biggest source files in the repo are also in those crates:

File	Approximate size
crates/uv-resolver/src/lock/mod.rs	~273 KB
crates/uv-python/src/discovery.rs	~175 KB
crates/uv-resolver/src/resolver/mod.rs	~182 KB
crates/uv-pep440/src/version.rs	~162 KB
crates/uv/src/settings.rs	~157 KB
crates/uv/src/lib.rs	~110 KB
crates/uv-resolver/src/resolver/environment.rs	~33 KB

Activity

uv is under continuous heavy development.

Metric	Value
Commits in the last 90 days	709
Approximate monthly commit volume (2026 Q1–Q2)	14 (Jan, partial) → 204 (Feb) → 285 (Mar) → 207 (Apr)
Releases tagged	272

Bot-attributed activity in the last 90 days (lower bound — does not capture inline AI tools or Co-authored-by lines):

Author	Commits in last 90 days
renovate[bot]	178
github-actions[bot]	11
dependabot[bot]	1

That is roughly 27% of the last 90 days' commits attributed to bots, primarily Renovate dependency bumps and GitHub Actions release automation. The remaining 73% are human-authored.

Test infrastructure

Metric	Value
Integration test crate	crates/uv/tests/it/
Test runner	cargo nextest (recommended)
Snapshot framework	insta plus the project-defined uv_snapshot! macro
CI workflows	28 GitHub Actions workflows in .github/workflows/
Notable test workflows	ci.yml, test.yml, test-integration.yml, test-system.yml, test-smoke.yml, test-windows-trampolines.yml, test-ecosystem.yml

CI splits work across check-fmt, check-lint, check-docs, check-generated-files, check-publish, check-release, check-zizmor, plus the various test-* and build-* workflows.

Documentation

Metric	Value
Docs source	docs/ (mkdocs)
Top-level doc sections	getting-started/, guides/, concepts/, pip/, reference/
Style guide	STYLE.md (writing conventions for messaging and docs)
Contributor guide	CONTRIBUTING.md, AGENTS.md, CLAUDE.md
Changelog	CHANGELOG.md (746 lines and growing)

Dependency surface

uv pins workspace dependencies via the [workspace.dependencies] table in the root Cargo.toml. Notable third-party libraries:

Area	Crate	Why
Resolver	astral-pubgrub (uv's fork of pubgrub), astral-version-ranges	core SAT-style solver
HTTP	reqwest, astral-reqwest-middleware, astral-reqwest-retry, hyper (test)	registry client
Async	tokio, futures, tokio-stream, tokio-util, async-channel	concurrency
CPU-bound parallelism	rayon	wheel install, bytecode compile
Hashing / crypto	sha2, blake2, md-5, data-encoding, webpki-root-certs, rustls	wheel hashes, TLS
Serialization	serde, serde_json, toml, toml_edit, rkyv, rmp-serde	TOML, JSON, cache
Compression / archives	flate2 (zlib-rs), xz2, async-compression, zip, astral_async_zip, astral-tokio-tar, tar	wheel/sdist extraction
Tracing	tracing, tracing-subscriber, tracing-tree, tracing-durations-export	structured logging
CLI	clap, clap_complete_command	argument parsing
Errors	thiserror, anyhow, miette	structured + reportable errors
Filesystem	fs-err, tempfile, walkdir, globwalk, globset, ignore	cross-platform FS
Windows	windows, windows-registry, windows-version, embed-manifest	platform glue
Memory allocators	mimalloc (Linux/Windows), jemalloc variants	startup speed

Where these numbers live

• The [workspace] definition is in Cargo.toml.
• Per-crate descriptions are in crates/README.md.
• Workflow files are in .github/workflows/.
• Author counts derive from git log. Per-person breakdowns are intentionally aggregated rather than ranked by individual contributor — see maintainers.md for the per-subsystem ownership view.