Fix some claude session state.

build.zig

@@ -180,17 +180,21 @@ pub fn build(b: *std.Build) void {
     palette_tests.root_module.addImport("ghostty-vt", ghostty.module("ghostty-vt"));
     test_step.dependOn(&b.addRunArtifact(palette_tests).step);
 
-    // herdr-core's frame format is its own root: the bytes of the wire
-    // protocol, testable with no core to talk to. The connection on top of it
+    // herdr-core's client is its own root: the frame format (the bytes of the
+    // wire protocol) and the pure rules about what a terminal's environment
+    // keeps, both testable with no core to talk to. The connection itself
     // wants a socket and a main loop, and is checked by running it.
-    const hc_frame_tests = b.addTest(.{
+    const hc_tests = b.addTest(.{
         .root_module = b.createModule(.{
-            .root_source_file = b.path("src/hc/frame.zig"),
+            .root_source_file = b.path("src/hc.zig"),
             .target = target,
             .optimize = optimize,
+            .link_libc = true,
         }),
     });
-    test_step.dependOn(&b.addRunArtifact(hc_frame_tests).step);
+    hc_tests.root_module.addImport("glib", gobject.module("glib2"));
+    hc_tests.root_module.addImport("glibunix", gobject.module("glibunix2"));
+    test_step.dependOn(&b.addRunArtifact(hc_tests).step);
 
     // And a root for the settings file itself. `Settings.zig` reaches GLib for
     // where the file lives, but reading and writing its *contents* is pure