This Cargo workspace separates starter and reference trees:

vector-starter/
  core/          package: vector-core-starter
  datafusion/    package: vector-datafusion-starter
vector/
  core/          package: vector-core
  datafusion/    package: vector-datafusion

Chapter 1 makes vector-index selection observable from SQL. Chapter 2 implements IVFFlat behind that unchanged optimizer boundary.

Check the untouched starter without executing TODOs:

cargo check -p vector-core-starter
cargo check -p vector-datafusion-starter

Validate the completed reference:

cargo test -p vector-core
cargo test -p vector-datafusion
cargo run --release -p vector-core --example recall

The workspace uses the stable Rust channel from rust-toolchain.toml and pins course dependencies in Cargo.lock.