policy: mcptest policy simulate OSS governance gate (WOR-1421)

crates/mcptest-core/src/lib.rs

@@ -85,6 +85,9 @@
 //! - [`plugins`]: subprocess plugin protocol. Spawns a polyglot
 //!   plugin binary, exchanges newline-delimited JSON over stdin/stdout,
 //!   and caches the process for the run lifetime.
+//! - [`policy`]: offline governance policy simulator. Turns saved artifacts
+//!   into a flat fact map and evaluates declarative rules plus expiring
+//!   waivers into a pass / warn / fail verdict, with no network access.
 //! - [`subprocess`]: one-shot JSON subprocess helper shared by
 //!   the transform step and the context-aware hooks. Spawns a command,
 //!   writes one JSON value to stdin, and parses one JSON value from stdout.
@@ -125,6 +128,7 @@ pub mod migration;
 pub mod model_compat;
 pub mod network;
 pub mod plugins;
+pub mod policy;
 pub mod profiles;
 pub mod propose;
 pub mod protocol;