Reference

Public API

item	what it is
value shapes	tagged JSON pair __pair__ and friends — the values combinators operate on
EvalEngine impl	the engine-exec contract
handler support	resumable handle/perform via the shared journal keys (ADR-0158)

Crate

crate	role
hnl-engine-exec-tree-walk	engine implementation

Build and test

cargo build     # sibling [patch] tables resolve deps from ../<repo>
cargo test      # cargo test

Dependencies are git deps on branch = "main"; locally the [patch] tables point at sibling checkouts (regenerated by host/scripts/dev-link.sh).