//! Code intelligence from omnicode's `omni`, an external program wsb runs.
//!
//! wsb holds no analysis of its own. `omni` analyzes a directory into facts — definitions,
//! references, diagnostics, each with the evidence behind it — and serves them on its command
//! line (`wsb code`) and as a language server (the workbench's editor). This module is what
//! both share: finding `omni` and knowing what it answers for ([`locate`]), and which
//! directory a file's analysis is made at ([`roots`]).