Cargo Build System & Project Management

# Create new projects
cargo new my-app           # Binary application
cargo new my-lib --lib     # Library crate

# Build and run
cargo build                # Debug build
cargo build --release      # Optimized release build
cargo run                  # Build and run
cargo run -- --flag arg    # Pass arguments to binary

# Testing
cargo test                 # Run all tests
cargo test test_name       # Run specific test
cargo test -- --nocapture  # Show println output

# Code quality
cargo clippy               # Linting
cargo fmt                  # Format code
cargo doc --open           # Generate and view documentation

# Dependency management
cargo add serde --features derive  # Add dependency
cargo update                       # Update to latest compatible
cargo tree                         # View dependency graph

[package]
name = "my-app"
version = "0.1.0"
edition = "2021"
rust-version = "1.75"

[dependencies]
serde = { version = "1.0", features = ["derive"] }
tokio = { version = "1", features = ["full"] }
anyhow = "1.0"

[dev-dependencies]
criterion = "0.5"
proptest = "1.0"

[profile.release]
lto = true           # Link-time optimization
codegen-units = 1     # Better optimization
strip = true          # Strip debug symbols

[features]
default = ["json"]
json = ["serde_json"]
xml = ["quick-xml"]
full = ["json", "xml"]

# Root Cargo.toml
[workspace]
members = [
    "crates/core",
    "crates/cli",
    "crates/server",
]

[workspace.dependencies]
serde = { version = "1.0", features = ["derive"] }
tokio = { version = "1", features = ["full"] }

# In member crate Cargo.toml
[dependencies]
serde = { workspace = true }