// adopt_gate_box.h - Box: Must-adopt gate (Ready→Mailbox→Registry)
#pragma once
#include <stdint.h>
#include "hakmem_tiny_superslab.h"
typedef struct TinyTLSSlab TinyTLSSlab;

// Try to adopt a SuperSlab for a class (single-pass, small-window)
// Returns adopted SuperSlab* or NULL
SuperSlab* adopt_gate_try(int class_idx, TinyTLSSlab* tls);