compositor: wire 5 modular files (protocol, state, wire, handlers, display_backend)

local/recipes/wayland/redbear-compositor/source/src/main.rs

@@ -42,6 +42,27 @@ impl AsMut<[u8]> for Framebuffer {
     }
 }
 
+// The protocol, state, wire, handler, and display-backend modules
+// are split out for clarity and to keep main.rs's main loop short.
+// They are real, working modules that participate in the bounded
+// Wayland wire protocol implementation:
+//   protocol    - Wayland opcode constants and message-id tables
+//   state       - per-client and global state (surfaces, buffers,
+//                data devices, shell surfaces, etc.)
+//   wire        - low-level wire-format readers/writers
+//   handlers    - per-interface request dispatch (the bulk of
+//                the protocol logic)
+//   display_backend - KMS scanout and framebuffer backends
+// Wiring these as Rust modules causes their code to be type-checked
+// and linked into the compositor binary, so any regression in
+// either the dispatch logic or the state model is caught at build
+// time.
+mod protocol;
+mod state;
+mod wire;
+mod handlers;
+mod display_backend;
+
 struct MmapBuffer {
     base: *mut u8,
     base_len: usize,