How to manage Cargo workspace dependencies

Manage Cargo workspace dependencies by defining shared versions in the root Cargo.toml under [workspace.dependencies] and referencing them in member crates using the workspace = true flag.

# Root Cargo.toml
[workspace.dependencies]
serde = "1.0"
regex = "1.3.3"

# Member crate Cargo.toml
[dependencies]
serde = { workspace = true }
regex = { workspace = true }

This ensures all workspace members use the exact same dependency versions without repetition.

A Cargo workspace lets you group multiple related projects under one umbrella. By listing dependencies once in the main configuration file, you ensure every project in the group uses the same library versions. Think of it like a central supply closet for a team, guaranteeing everyone grabs the same tools.