Still doesn't compile, but I think excellent progress.

src/c/payloads/lambda.c

@@ -0,0 +1,24 @@
+/**
+ * lambda.c
+ *
+ * Post Scarcity Soctware Environment
+ *
+ * TODO: Edit purpose.
+ *
+ * Copyright (c): 27 Apr 2026 Simon Brooke <simon@journeyman.cc>
+ * Licensed under GPL version 2.0, or, at your option, any later version.
+ */
+
+#include "memory/pointer.h"
+#include "memory/pso.h"
+#include "memory/pso2.h"
+
+struct pso_pointer make_lambda_like_thing(struct pso_pointer frame_pointer,
+										  struct pso_pointer args,
+										  struct pso_pointer body, char *tag) {
+
+	struct pso_pointer result = allocate(frame_pointer, tag, 2);
+	struct pso2 *object = pointer_to_object(result);
+	object->payload.lambda.args = args;
+	object->payload.lambda.body = body;
+}