//! Filesystem capabilities: paths, directories, watching, and hashing.
//!
//! One linked test binary per category, not per file: each module below was
//! its own top-level integration test, and each one statically linked this
//! crate's whole graph. Test IDs are now `fs::<module>::<test>`.
//! See AGENTS.md for the rule.
// Aliased: the category also has a `readiness_marker` test module.