Documents all process dictionary keys used by the BEAM VM, and owns module/symbol registration.

Heap objects

• integer_id (positive integer) — JS object/array data (map, list, shape, {:qb_arr, …})
• {:qb_cell, ref} — closure variable cell

Object metadata (ephemeral — cleared by GC)

• {:qb_prop_desc, ref, key} — property descriptor override
• {:qb_frozen, ref} — frozen-object flag
• {:qb_var, name} — global variable binding
• {:qb_key_order, ref} — explicit property insertion order

Constructor / class metadata

• {:qb_class_proto, fun} — class prototype object
• {:qb_func_proto, fun} — Function.prototype ref (per closure)
• {:qb_parent_ctor, fun} — parent constructor reference
• {:qb_ctor_statics, fun} — constructor static properties map
• {:qb_home_object, bytecode_ref} — home object for super dispatch

Interpreter context

• :qb_ctx — current interpreter Context struct
• :qb_fast_ctx — fast-path context tuple (atoms, globals, func, arg_buf, this, new_target, home_object, super)
• :qb_atoms — predefined atom table (tuple of strings)
• :qb_object_prototype — Object.prototype heap ref
• :qb_array_proto — Array.prototype heap ref (set by globals initializer)
• :qb_func_proto — global Function.prototype heap ref

Globals / modules

• :qb_persistent_globals — globals that survive gc/0
• :qb_handler_globals — handler-installed globals
• :qb_global_bindings_cache — cached runtime global bindings map
• :qb_base_globals_cache — merged base-globals cache
• {:qb_runtime_mode, runtime_pid} — per-runtime execution mode
• {:qb_module, name} — exported bindings for a named module
• :qb_module_list — list of registered module names
• {:qb_symbol_registry, key} — global Symbol registry entry

Caches (safe to drop — recomputed on demand)

• {:qb_compiled, key} — compiled function cache
• {:qb_fn_atoms, key} — per-function atom table cache
• {:qb_capture_keys, key} — closure capture-key tuple cache
• {:qb_wrap_cache, keys_tuple} — shape info cache for Heap.wrap_keyed/2
• {:qb_regexp_result, ref} — last RegExp exec result (indices, groups)
• {:qb_string_codepoints, string} — codepoint list cache for string iteration
• :qb_builtin_names — MapSet of built-in global names (for typeof guard)
• :qb_shape_table — shape-id → key-list table
• :qb_shape_empty — empty shape id
• :qb_shape_next_id — next shape id counter

GC bookkeeping

• :qb_alloc_count — live object count after last GC
• :qb_gc_threshold — allocation count that triggers next GC
• :qb_gc_needed — flag set when threshold is exceeded
• :qb_next_id — monotonic heap object id counter

Ephemeral / call-stack

• :qb_invoke_depth — current synchronous call-stack depth
• :qb_eval_restore_stack — per-eval object-mutation undo log
• :qb_function_type_stack — compile-time function-type inference stack
• :qb_active_frames — stacktrace frame list
• {:qb_promise_waiters, ref} — promise continuation list

Misc

• {:qb_microtask_queue, …} — microtask queue entries

Timer state

• :qb_timer_queue — list of pending timer entries (setTimeout/setInterval)
• :qb_timer_next_id — monotonic counter for timer IDs