Build and test

cargo xtask check     # cargo fmt --check + clippy --workspace --all-targets -D warnings
cargo xtask test      # cargo nextest run --workspace (falls back to cargo test)
cargo xtask coverage  # cargo llvm-cov HTML report → target/llvm-cov/html
cargo xtask fmt       # apply formatting

CI (.github/workflows/ci.yml) runs lint, nextest + doctests, and a coverage job that gates on 100% line coverage — any DA:<line>,0 in the lcov report fails the build.

Scope a single crate while iterating:

cargo nextest run -p hypha-outbox
cargo clippy -p hypha-control --all-targets