diff --git a/debug/debug.c b/debug/debug.c
index 93e8b990..2679ad57 100644
--- a/debug/debug.c
+++ b/debug/debug.c
@@ -1,27 +1,15 @@
 #include "cell.h"
 
-// Return the current stack depth.
-JSC_CCALL(debug_stack_depth, return number2js(js,js_debugger_stack_depth(js)))
+// TODO: Reimplement stack depth for register VM
+JSC_CCALL(debug_stack_depth, return number2js(js, 0))
 
-// Return a backtrace of the current call stack.
-JSC_CCALL(debug_build_backtrace, return js_debugger_build_backtrace(js))
-
-// Return the closure variables for a given function.
-JSC_CCALL(debug_closure_vars, return js_debugger_closure_variables(js,argv[0]))
-
-JSC_CCALL(debug_set_closure_var,
-  js_debugger_set_closure_variable(js,argv[0],argv[1],argv[2]);
-  return JS_NULL;
-)
-
-// Return the local variables for a specific stack frame.
-JSC_CCALL(debug_local_vars, return js_debugger_local_variables(js, js2number(js,argv[0])))
-
-// Return metadata about a given function.
-JSC_CCALL(debug_fn_info, return js_debugger_fn_info(js, argv[0]))
-
-// Return an array of functions in the current backtrace.
-JSC_CCALL(debug_backtrace_fns, return js_debugger_backtrace_fns(js))
+// TODO: Reimplement debug introspection for register VM
+JSC_CCALL(debug_build_backtrace, return JS_NewArray(js))
+JSC_CCALL(debug_closure_vars, return JS_NewObject(js))
+JSC_CCALL(debug_set_closure_var, return JS_NULL;)
+JSC_CCALL(debug_local_vars, return JS_NewObject(js))
+JSC_CCALL(debug_fn_info, return JS_NewObject(js))
+JSC_CCALL(debug_backtrace_fns, return JS_NewArray(js))
 
 static const JSCFunctionListEntry js_debug_funcs[] = {
   MIST_FUNC_DEF(debug, stack_depth, 0),
@@ -37,4 +25,4 @@ JSValue js_debug_use(JSContext *js) {
   JSValue mod = JS_NewObject(js);
   JS_SetPropertyFunctionList(js,mod,js_debug_funcs,countof(js_debug_funcs));
   return mod;
-}
\ No newline at end of file
+}
diff --git a/debug/js.c b/debug/js.c
index 1bf7c3ae..e2d4d2f7 100644
--- a/debug/js.c
+++ b/debug/js.c
@@ -1,48 +1,16 @@
 #include "cell.h"
 
 JSC_CCALL(os_mem_limit, JS_SetMemoryLimit(JS_GetRuntime(js), js2number(js,argv[0])))
-JSC_CCALL(os_max_stacksize, JS_SetMaxStackSize(JS_GetRuntime(js), js2number(js,argv[0])))
+JSC_CCALL(os_max_stacksize, JS_SetMaxStackSize(js, js2number(js,argv[0])))
 
-// Compute the approximate size of a single JS value in memory.
+// TODO: Reimplement memory usage reporting for new allocator
 JSC_CCALL(os_calc_mem,
-  JSMemoryUsage mu;
-  JS_ComputeMemoryUsage(JS_GetRuntime(js),&mu);
   ret = JS_NewObject(js);
-  JS_SetPropertyStr(js,ret,"malloc_size",number2js(js,mu.malloc_size));
-  JS_SetPropertyStr(js,ret,"malloc_limit",number2js(js,mu.malloc_limit));
-  JS_SetPropertyStr(js,ret,"memory_used_size",number2js(js,mu.memory_used_size));
-  JS_SetPropertyStr(js,ret,"malloc_count",number2js(js,mu.malloc_count));
-  JS_SetPropertyStr(js,ret,"memory_used_count",number2js(js,mu.memory_used_count));
-  JS_SetPropertyStr(js,ret,"str_count",number2js(js,mu.str_count));
-  JS_SetPropertyStr(js,ret,"str_size",number2js(js,mu.str_size));
-  JS_SetPropertyStr(js,ret,"obj_count",number2js(js,mu.obj_count));
-  JS_SetPropertyStr(js,ret,"obj_size",number2js(js,mu.obj_size));
-  JS_SetPropertyStr(js,ret,"prop_count",number2js(js,mu.prop_count));
-  JS_SetPropertyStr(js,ret,"prop_size",number2js(js,mu.prop_size));
-  JS_SetPropertyStr(js,ret,"shape_count",number2js(js,mu.shape_count));
-  JS_SetPropertyStr(js,ret,"shape_size",number2js(js,mu.shape_size));
-  JS_SetPropertyStr(js,ret,"js_func_count",number2js(js,mu.js_func_count));
-  JS_SetPropertyStr(js,ret,"js_func_size",number2js(js,mu.js_func_size));
-  JS_SetPropertyStr(js,ret,"js_func_code_size",number2js(js,mu.js_func_code_size));
-  JS_SetPropertyStr(js,ret,"js_func_pc2line_count",number2js(js,mu.js_func_pc2line_count));
-  JS_SetPropertyStr(js,ret,"js_func_pc2line_size",number2js(js,mu.js_func_pc2line_size));
-  JS_SetPropertyStr(js,ret,"c_func_count",number2js(js,mu.c_func_count));
-  JS_SetPropertyStr(js,ret,"array_count",number2js(js,mu.array_count));
-  JS_SetPropertyStr(js,ret,"fast_array_count",number2js(js,mu.fast_array_count));
-  JS_SetPropertyStr(js,ret,"fast_array_elements",number2js(js,mu.fast_array_elements));
-  JS_SetPropertyStr(js,ret,"binary_object_count",number2js(js,mu.binary_object_count));
-  JS_SetPropertyStr(js,ret,"binary_object_size",number2js(js,mu.binary_object_size));
 )
 
-// Disassemble a function object into a string.
-JSC_CCALL(js_disassemble,
-  return js_debugger_fn_bytecode(js, argv[0]);
-)
-
-// Return metadata about a given function.
-JSC_CCALL(js_fn_info,
-  return js_debugger_fn_info(js, argv[0]);
-)
+// TODO: Reimplement for register VM
+JSC_CCALL(js_disassemble, return JS_NewArray(js);)
+JSC_CCALL(js_fn_info, return JS_NewObject(js);)
 
 static const JSCFunctionListEntry js_js_funcs[] = {
   MIST_FUNC_DEF(os, calc_mem, 0),
diff --git a/source/cell.h b/source/cell.h
index dbc3b9ea..3735e66a 100644
--- a/source/cell.h
+++ b/source/cell.h
@@ -78,8 +78,7 @@ void cell_trace_sethook(cell_hook);
 #define QJSCLASS(TYPE, ...)\
 JSClassID js_##TYPE##_id;\
 static void js_##TYPE##_finalizer(JSRuntime *rt, JSValue val){\
-JSContext *js = JS_GetContext(rt);\
-TYPE *n = JS_GetOpaque2(js, val, js_##TYPE##_id); \
+TYPE *n = JS_GetOpaque(val, js_##TYPE##_id); \
 TYPE##_free(rt,n);}\
 static JSClassDef js_##TYPE##_class = {\
   .class_name = #TYPE,\
diff --git a/source/quickjs-internal.h b/source/quickjs-internal.h
index 5d2a7416..4ea2c645 100644
--- a/source/quickjs-internal.h
+++ b/source/quickjs-internal.h
@@ -307,9 +307,6 @@ typedef enum JSErrorEnum {
 /* Compatibility: JS_TAG_STRING is an alias for text type checks */
 #define JS_TAG_STRING JS_TAG_STRING_IMM
 
-/* JS_TAG_FUNCTION doesn't exist in new encoding - use JS_IsFunction check instead */
-#define JS_TAG_FUNCTION 0xFE  /* dummy value, never matches any tag */
-
 /* JS_ThrowMemoryError is an alias for JS_ThrowOutOfMemory */
 #define JS_ThrowMemoryError(ctx) JS_ThrowOutOfMemory(ctx)
 
@@ -318,8 +315,6 @@ static inline objhdr_t objhdr_set_cap56 (objhdr_t h, uint64_t cap) {
   return (h & 0xFF) | ((cap & OBJHDR_CAP_MASK) << OBJHDR_CAP_SHIFT);
 }
 
-typedef enum OPCodeEnum OPCodeEnum;
-
 /* ============================================================
    Buddy Allocator for Actor Memory Blocks
    ============================================================ */
@@ -775,27 +770,6 @@ typedef struct JSFrame {
   JSValue slots[];           /* [this][args][captured][locals][temps] */
 } JSFrame;
 
-/* Execution state returned by vm_execute_frame */
-typedef enum {
-  VM_EXEC_NORMAL,    /* Continue executing current frame */
-  VM_EXEC_RETURN,    /* Frame returned, pop and resume caller */
-  VM_EXEC_CALL,      /* Need to push new frame for call */
-  VM_EXEC_EXCEPTION, /* Exception thrown, unwind frames */
-} VMExecState;
-
-/* Call info for frame push */
-typedef struct {
-  JSValue func_obj;
-  JSValue this_obj;
-  int argc;
-  JSValue *argv;
-  const uint8_t *ret_pc;
-  int ret_sp_offset;
-  int call_argc;
-  int call_has_this;
-  int is_tail_call;
-} VMCallInfo;
-
 static inline objhdr_t objhdr_set_s (objhdr_t h, bool s) {
   return s ? (h | OBJHDR_S_MASK) : (h & ~OBJHDR_S_MASK);
 }
@@ -1067,9 +1041,6 @@ struct JSContext {
   // todo: want this, but should be a simple increment/decrement counter while frames are pushed
   size_t stack_depth;
   size_t stack_limit;
-
-  /* Parser state (for GC to scan cpool during parsing) */
-  struct JSFunctionDef *current_parse_fd;
 };
 
 /* ============================================================
@@ -1244,46 +1215,6 @@ typedef struct JSFunction {
   } u;
 } JSFunction;
 
-/* for the encoding of the pc2line table */
-#define PC2LINE_BASE (-1)
-#define PC2LINE_RANGE 5
-#define PC2LINE_OP_FIRST 1
-#define PC2LINE_DIFF_PC_MAX ((255 - PC2LINE_OP_FIRST) / PC2LINE_RANGE)
-
-/* New simplified compiled unit structure for Phase 1+ simplification.
-   Replaces JSFunctionBytecode with a simpler model:
-   - No closure machinery (uses outer_frame chain at runtime)
-   - Free variables resolved at link time against env + globals
-   - Nested functions stored as separate units in cpool */
-typedef struct JSCompiledUnit {
-  objhdr_t header; /* must come first */
-
-  /* Bytecode (self pointer) */
-  uint8_t *byte_code_buf;
-  int byte_code_len;
-
-  /* Constants - strings, numbers, nested unit refs (self pointer) */
-  JSValue *cpool;
-  int cpool_count;
-
-  /* Stack requirements */
-  uint16_t local_count;  /* total local slots (args + vars) */
-  uint16_t stack_size;   /* operand stack depth */
-
-  /* Flags */
-  uint8_t has_debug : 1;
-  uint8_t read_only_bytecode : 1;
-
-  /* Debug info (optional - only present if has_debug) */
-  struct {
-    JSValue filename;
-    int source_len;
-    int pc2line_len;
-    uint8_t *pc2line_buf;
-    char *source;
-  } debug;
-} JSCompiledUnit;
-
 /* ============================================================
    Context-Neutral Module Format (Phase 2+)
    Struct definitions are in quickjs.h
@@ -1301,7 +1232,6 @@ typedef struct JSCompiledUnit {
 #endif
 
 JSValue js_call_c_function (JSContext *ctx, JSValue func_obj, JSValue this_obj, int argc, JSValue *argv);
-JSValue js_call_bound_function (JSContext *ctx, JSValue func_obj, JSValue this_obj, int argc, JSValue *argv);
 JSValue JS_CallInternal (JSContext *ctx, JSValue func_obj, JSValue this_obj, int argc, JSValue *argv, int flags);
 JSValue JS_CallRegisterVM(JSContext *ctx, JSCodeRegister *code, JSValue this_obj, int argc, JSValue *argv, JSValue env, JSValue outer_frame);
 int JS_DeleteProperty (JSContext *ctx, JSValue obj, JSValue prop);
@@ -1319,9 +1249,6 @@ JSValue js_new_function (JSContext *ctx, JSFunctionKind kind);
 /* Forward declaration - helper to set cap in objhdr */
 static inline objhdr_t objhdr_set_cap56 (objhdr_t h, uint64_t cap);
 
-/* JS_ThrowMemoryError is an alias for JS_ThrowOutOfMemory */
-#define JS_ThrowMemoryError(ctx) JS_ThrowOutOfMemory(ctx)
-
 /* GC-SAFE: JS_SetPropertyInternal: same as JS_SetProperty but doesn't check stone.
    Internal use only. May trigger GC if record needs to resize. */
 
@@ -1508,8 +1435,6 @@ typedef struct PPretext {
   int cap;
 } PPretext;
 
-#define JS_CALL_FLAG_COPY_ARGV (1 << 1)
-
 extern JSClassID js_class_id_alloc;
 
 /* === Forward declarations for functions split across modules === */
@@ -1519,12 +1444,6 @@ int ctx_gc (JSContext *ctx, int allow_grow, size_t alloc_size);
 JSValue JS_CallInternal (JSContext *ctx, JSValue func_obj, JSValue this_obj, int argc, JSValue *argv, int flags);
 
 /* runtime.c exports */
-JSValue JS_ThrowStackOverflow (JSContext *ctx);
-int JS_DefineObjectName (JSContext *ctx, JSValue obj, JSValue name);
-int JS_DefineObjectNameComputed (JSContext *ctx, JSValue obj, JSValue str);
-int js_method_set_properties (JSContext *ctx, JSValue func_obj, JSValue name, int flags, JSValue home_obj);
-JSValue JS_GetPropertyValue (JSContext *ctx, JSValue this_obj, JSValue prop);
-__exception int JS_CopyDataProperties (JSContext *ctx, JSValue target, JSValue source, JSValue excluded, BOOL setprop);
 int js_string_compare_value (JSContext *ctx, JSValue op1, JSValue op2, BOOL eq_only);
 int js_string_compare_value_nocase (JSContext *ctx, JSValue op1, JSValue op2);
 JSValue js_regexp_constructor (JSContext *ctx, JSValue this_val, int argc, JSValue *argv);
@@ -1533,11 +1452,6 @@ int JS_HasPropertyKey (JSContext *ctx, JSValue obj, JSValue key);
 void *js_realloc_rt (void *ptr, size_t size);
 char *js_strdup_rt (const char *str);
 JSValue JS_ConcatString (JSContext *ctx, JSValue op1, JSValue op2);
-__exception int js_post_inc_slow (JSContext *ctx, JSValue *sp, OPCodeEnum op);
-no_inline int js_not_slow (JSContext *ctx, JSValue *sp);
-no_inline int js_relational_slow (JSContext *ctx, JSValue *sp, OPCodeEnum op);
-__exception int js_operator_in (JSContext *ctx, JSValue *sp);
-__exception int js_operator_delete (JSContext *ctx, JSValue *sp);
 JSText *pretext_init (JSContext *ctx, int capacity);
 JSText *pretext_putc (JSContext *ctx, JSText *s, uint32_t c);
 JSText *pretext_concat_value (JSContext *ctx, JSText *s, JSValue v);
@@ -1563,19 +1477,6 @@ uint64_t get_text_hash (JSText *text);
 void pack_utf32_to_words (const uint32_t *utf32, uint32_t len, uint64_t *packed);
 int text_equal (JSText *a, const uint64_t *packed_b, uint32_t len_b);
 
-static inline JSValue *get_upvalue_ptr (JSValue frame_val, int depth, int slot) {
-  if (JS_IsNull(frame_val)) return NULL;
-  JSFrame *frame = JS_VALUE_GET_FRAME(frame_val);
-  while (depth > 0) {
-    JSFunction *fn = JS_VALUE_GET_FUNCTION(frame->function);
-    frame_val = fn->u.reg.outer_frame;
-    if (JS_IsNull(frame_val)) return NULL;
-    frame = JS_VALUE_GET_FRAME(frame_val);
-    depth--;
-  }
-  return &frame->slots[slot];
-}
-
 void print_backtrace (JSContext *ctx, const char *filename, int line_num, int col_num);
 JSValue JS_ThrowError2 (JSContext *ctx, JSErrorEnum error_num, const char *fmt, va_list ap, BOOL add_backtrace);
 JSValue gc_copy_value (JSContext *ctx, JSValue v, uint8_t *from_base, uint8_t *from_end, uint8_t *to_base, uint8_t **to_free, uint8_t *to_end);
@@ -1587,10 +1488,6 @@ PPretext *ppretext_append_jsvalue (PPretext *p, JSValue str);
 PPretext *ppretext_append_int (PPretext *p, int n);
 JSValue js_atof (JSContext *ctx, const char *str, const char **pp, int radix, int flags);
 
-/* Defines from runtime section needed by cell_js.c */
-#define DEFINE_GLOBAL_LEX_VAR (1 << 7)
-#define DEFINE_GLOBAL_FUNC_VAR (1 << 6)
-
 #define ATOD_INT_ONLY (1 << 0)
 /* accept Oo and Ob prefixes in addition to 0x prefix if radix = 0 */
 #define ATOD_ACCEPT_BIN_OCT (1 << 2)
@@ -1607,14 +1504,6 @@ JSValue js_atof (JSContext *ctx, const char *str, const char **pp, int radix, in
 /* accept -0x1 */
 #define ATOD_ACCEPT_PREFIX_AFTER_SIGN (1 << 10)
 
-#define GLOBAL_VAR_OFFSET 0x40000000
-#define ARGUMENT_VAR_OFFSET 0x20000000
-
-/* Inline functions from runtime section needed by cell_js.c */
-static inline void js_dbuf_init (JSContext *ctx, DynBuf *s) {
-  dbuf_init2 (s, ctx->rt, NULL);
-}
-
 static inline int to_digit (int c) {
   if (c >= '0' && c <= '9') return c - '0';
   else if (c >= 'A' && c <= 'Z') return c - 'A' + 10;
@@ -1622,54 +1511,6 @@ static inline int to_digit (int c) {
   else return 36;
 }
 
-static inline void dbuf_put_leb128 (DynBuf *s, uint32_t v) {
-  uint32_t a;
-  for (;;) {
-    a = v & 0x7f;
-    v >>= 7;
-    if (v != 0) {
-      dbuf_putc (s, a | 0x80);
-    } else {
-      dbuf_putc (s, a);
-      break;
-    }
-  }
-}
-
-static inline void dbuf_put_sleb128 (DynBuf *s, int32_t v1) {
-  uint32_t v = v1;
-  dbuf_put_leb128 (s, (2 * v) ^ -(v >> 31));
-}
-
-static inline int get_leb128 (uint32_t *pval, const uint8_t *buf, const uint8_t *buf_end) {
-  const uint8_t *ptr = buf;
-  uint32_t v, a, i;
-  v = 0;
-  for (i = 0; i < 5; i++) {
-    if (unlikely (ptr >= buf_end)) break;
-    a = *ptr++;
-    v |= (a & 0x7f) << (i * 7);
-    if (!(a & 0x80)) {
-      *pval = v;
-      return ptr - buf;
-    }
-  }
-  *pval = 0;
-  return -1;
-}
-
-static inline int get_sleb128 (int32_t *pval, const uint8_t *buf, const uint8_t *buf_end) {
-  int ret;
-  uint32_t val;
-  ret = get_leb128 (&val, buf, buf_end);
-  if (ret < 0) {
-    *pval = 0;
-    return -1;
-  }
-  *pval = (val >> 1) ^ -(val & 1);
-  return ret;
-}
-
 no_inline int js_realloc_array (JSContext *ctx, void **parray, int elem_size, int *psize, int req_size);
 static inline int js_resize_array (JSContext *ctx, void **parray, int elem_size, int *psize, int req_size) {
   if (unlikely (req_size > *psize))
@@ -1684,7 +1525,6 @@ JSValue js_key_from_string (JSContext *ctx, JSValue val);
 /* mach.c exports */
 JSValue JS_CallRegisterVM(JSContext *ctx, JSCodeRegister *code, JSValue this_obj, int argc, JSValue *argv, JSValue env, JSValue outer_frame);
 JSFrameRegister *alloc_frame_register(JSContext *ctx, int slot_count);
-cJSON *mach_find_scope_record(cJSON *scopes, int function_nr);
 int reg_vm_check_interrupt(JSContext *ctx);
 
 
diff --git a/source/quickjs.h b/source/quickjs.h
index 05a0aa7c..6df02771 100644
--- a/source/quickjs.h
+++ b/source/quickjs.h
@@ -283,13 +283,6 @@ JS_IsShortFloat (JSValue v) {
 #define JS_TRUE ((JSValue)(JS_TAG_BOOL | (1 << 5)))
 #define JS_EXCEPTION ((JSValue)JS_TAG_EXCEPTION)
 
-/* flags for object properties - simplified model:
-   - No per-property writable/configurable (use stone() for immutability)
-   - Text keys are enumerable, object keys are not */
-#define JS_PROP_TMASK (3 << 4) /* mask for NORMAL, VARREF */
-#define JS_PROP_NORMAL (0 << 4)
-#define JS_PROP_VARREF (2 << 4) /* used internally for closures */
-
 #ifndef JS_DEFAULT_STACK_SIZE
 #define JS_DEFAULT_STACK_SIZE (1024 * 1024)
 #endif
@@ -312,16 +305,10 @@ JSRuntime *JS_NewRuntime (void);
 void JS_SetMemoryLimit (JSRuntime *rt, size_t limit);
 /* use 0 to disable maximum stack size check */
 void JS_SetMaxStackSize (JSContext *ctx, size_t stack_size);
-/* should be called when changing thread to update the stack top value
-   used to check stack overflow. */
-void JS_UpdateStackTop (JSContext *ctx);
 void JS_FreeRuntime (JSRuntime *rt);
-JS_BOOL JS_IsLiveObject (JSRuntime *rt, JSValue obj);
 
 JSContext *JS_NewContext (JSRuntime *rt);
 void JS_FreeContext (JSContext *s);
-JSContext *JS_DupContext (JSContext *ctx);
-JSContext *JS_GetContext (JSRuntime *rt);
 void *JS_GetContextOpaque (JSContext *ctx);
 void JS_SetContextOpaque (JSContext *ctx, void *opaque);
 JSRuntime *JS_GetRuntime (JSContext *ctx);
@@ -330,24 +317,6 @@ JSValue JS_GetClassProto (JSContext *ctx, JSClassID class_id);
 
 JSContext *JS_NewContextWithHeapSize (JSRuntime *rt, size_t heap_size);
 
-typedef struct JSMemoryUsage {
-  int64_t malloc_size, malloc_limit, memory_used_size;
-  int64_t malloc_count;
-  int64_t memory_used_count;
-  int64_t str_count, str_size;
-  int64_t obj_count, obj_size;
-  int64_t prop_count, prop_size;
-  int64_t shape_count, shape_size;
-  int64_t js_func_count, js_func_size, js_func_code_size;
-  int64_t js_func_pc2line_count, js_func_pc2line_size;
-  int64_t c_func_count, array_count;
-  int64_t fast_array_count, fast_array_elements;
-  int64_t binary_object_count, binary_object_size;
-} JSMemoryUsage;
-
-void JS_ComputeMemoryUsage (JSRuntime *rt, JSMemoryUsage *s);
-void JS_DumpMemoryUsage (FILE *fp, const JSMemoryUsage *s, JSRuntime *rt);
-
 typedef void JSClassFinalizer (JSRuntime *rt, JSValue val);
 typedef JSValue JSClassCall (JSContext *ctx, JSValue func_obj,
                              JSValue this_val, int argc,
@@ -522,7 +491,6 @@ static inline JSValue JS_NewString (JSContext *ctx, const char *str) {
   return JS_NewStringLen (ctx, str, strlen (str));
 }
 JSValue JS_ToString (JSContext *ctx, JSValue val);
-JSValue JS_ToPropertyKey (JSContext *ctx, JSValue val);
 const char *JS_ToCStringLen2 (JSContext *ctx, size_t *plen, JSValue val1, JS_BOOL cesu8);
 static inline const char * JS_ToCStringLen (JSContext *ctx, size_t *plen, JSValue val1) {
   return JS_ToCStringLen2 (ctx, plen, val1, 0);
@@ -945,17 +913,6 @@ typedef void (*js_hook) (JSContext *, int type, js_debug *dbg, void *user);
 #define JS_HOOK_GC 8
 void js_debug_sethook (JSContext *ctx, js_hook, int type, void *user);
 
-uint32_t js_debugger_stack_depth (JSContext *ctx);
-JSValue js_debugger_backtrace_fns (JSContext *ctx);
-JSValue js_debugger_closure_variables (JSContext *ctx, JSValue fn);
-JSValue js_debugger_local_variables (JSContext *ctx, int stack_index);
-void js_debugger_set_closure_variable (JSContext *js, JSValue fn,
-                                       JSValue var_name, JSValue val);
-JSValue js_debugger_build_backtrace (JSContext *ctx);
-JSValue js_debugger_fn_info (JSContext *ctx, JSValue fn);
-JSValue js_debugger_fn_bytecode (JSContext *js, JSValue fn);
-void *js_debugger_val_address (JSContext *js, JSValue val);
-
 /* Memory allocation functions (bump allocator) */
 void *js_malloc (JSContext *ctx, size_t size);
 void *js_mallocz (JSContext *ctx, size_t size);
@@ -973,12 +930,6 @@ struct cJSON;
 /* Compiled bytecode (context-free, serializable) */
 typedef struct MachCode MachCode;
 
-/* Compile AST cJSON tree to context-free MachCode. */
-MachCode *JS_CompileMachTree(struct cJSON *ast);
-
-/* Compile AST JSON string to context-free MachCode. */
-MachCode *JS_CompileMach(const char *ast_json);
-
 /* Free a compiled MachCode tree. */
 void JS_FreeMachCode(MachCode *mc);
 
diff --git a/source/runtime.c b/source/runtime.c
index 98ed9405..8899d74f 100644
--- a/source/runtime.c
+++ b/source/runtime.c
@@ -60,18 +60,6 @@ JS_BOOL JS_IsFunction (JSValue v) {
   return JS_IsGCObject(v) && objhdr_type(*chase(v)) == OBJ_FUNCTION;
 }
 
-JS_BOOL JS_IsCode (JSValue v) {
-  return JS_IsGCObject(v) && objhdr_type(*chase(v)) == OBJ_CODE;
-}
-
-JS_BOOL JS_IsForwarded (JSValue v) {
-  return JS_IsGCObject(v) && objhdr_type(*chase(v)) == OBJ_FORWARD;
-}
-
-JS_BOOL JS_IsFrame (JSValue v) {
-  return JS_IsGCObject(v) && objhdr_type(*chase(v)) == OBJ_FRAME;
-}
-
 JS_BOOL JS_IsBlob (JSValue v) {
   return JS_IsGCObject(v) && objhdr_type(*chase(v)) == OBJ_BLOB;
 }
@@ -1058,7 +1046,7 @@ JSValue gc_copy_value (JSContext *ctx, JSValue v, uint8_t *from_base, uint8_t *f
       continue;
     }
 
-    if (type != OBJ_ARRAY && type != OBJ_TEXT && type != OBJ_RECORD && type != OBJ_FUNCTION && type != OBJ_BLOB && type != OBJ_CODE && type != OBJ_FRAME) {
+    if (type != OBJ_ARRAY && type != OBJ_TEXT && type != OBJ_RECORD && type != OBJ_FUNCTION && type != OBJ_BLOB && type != OBJ_FRAME) {
       fprintf (stderr, "gc_copy_value: invalid object type %d at %p (hdr=0x%llx)\n", type, ptr, (unsigned long long)hdr);
       fprintf (stderr, "  This may be an interior pointer or corrupt root\n");
       fflush (stderr);
@@ -1150,9 +1138,6 @@ void gc_scan_object (JSContext *ctx, void *ptr, uint8_t *from_base, uint8_t *fro
   case OBJ_BLOB:
     /* No internal references to scan */
     break;
-  case OBJ_CODE:
-    /* Dead code: old bytecode objects no longer created */
-    break;
   case OBJ_FRAME: {
     /* JSFrame - scan function, caller, and slots */
     JSFrame *frame = (JSFrame *)ptr;
@@ -1173,14 +1158,6 @@ void gc_scan_object (JSContext *ctx, void *ptr, uint8_t *from_base, uint8_t *fro
   }
 }
 
-/* gc_scan_parser_cpool - no-op now that the old compiler is removed.
-   current_parse_fd is always NULL without cell_js.c. */
-void gc_scan_parser_cpool (JSContext *ctx, uint8_t *from_base, uint8_t *from_end,
-                           uint8_t *to_base, uint8_t **to_free, uint8_t *to_end) {
-  (void)ctx; (void)from_base; (void)from_end;
-  (void)to_base; (void)to_free; (void)to_end;
-}
-
 /* Cheney copying GC - collect garbage and compact live objects
    allow_grow: if true, grow heap when recovery is poor
    alloc_size: the allocation that triggered GC — used to size the new block */
@@ -1282,11 +1259,6 @@ int ctx_gc (JSContext *ctx, int allow_grow, size_t alloc_size) {
     ref->val = gc_copy_value (ctx, ref->val, from_base, from_end, to_base, &to_free, to_end);
   }
 
-  /* Scan parser's cpool (if parsing is in progress) */
-  if (ctx->current_parse_fd) {
-    gc_scan_parser_cpool (ctx, from_base, from_end, to_base, &to_free, to_end);
-  }
-
   /* Cheney scan: scan copied objects to find more references */
   uint8_t *scan = to_base;
 #ifdef DUMP_GC_DETAIL
@@ -1530,14 +1502,6 @@ void JS_FreeContext (JSContext *ctx) {
   JSRuntime *rt = ctx->rt;
   int i;
 
-#ifdef DUMP_MEM
-  {
-    JSMemoryUsage stats;
-    JS_ComputeMemoryUsage (rt, &stats);
-    JS_DumpMemoryUsage (stdout, &stats, rt);
-  }
-#endif
-
   for (i = 0; i < JS_NATIVE_ERROR_COUNT; i++) {
   }
   for (i = 0; i < ctx->class_count; i++) {
@@ -2295,18 +2259,6 @@ JSValue JS_NewObject (JSContext *ctx) {
 }
 
 
-// TODO: needs reworked
-int js_method_set_properties (JSContext *ctx, JSValue func_obj, JSValue name, int flags, JSValue home_obj) {
-  (void)ctx;
-  (void)flags;
-  (void)home_obj;
-  if (!JS_IsFunction (func_obj)) return -1;
-  JSFunction *f = JS_VALUE_GET_FUNCTION (func_obj);
-  /* name is now JSValue text */
-  if (JS_IsText (name)) { f->name = name; }
-  return 0;
-}
-
 /* Note: at least 'length' arguments will be readable in 'argv' */
 static JSValue JS_NewCFunction3 (JSContext *ctx, JSCFunction *func, const char *name, int length, JSCFunctionEnum cproto, int magic) {
   JSValue func_obj;
@@ -2454,7 +2406,7 @@ static int js_intrinsic_array_set (JSContext *ctx, JSValue *arr_ptr, word_t idx,
   return 0;
 }
 
-/* Allocate intrinsic function (JS_TAG_FUNCTION) */
+/* Allocate a new function object */
 JSValue js_new_function (JSContext *ctx, JSFunctionKind kind) {
   JSFunction *func = js_mallocz (ctx, sizeof (JSFunction));
   if (!func) return JS_EXCEPTION;
@@ -2465,17 +2417,6 @@ JSValue js_new_function (JSContext *ctx, JSFunctionKind kind) {
   return JS_MKPTR (func);
 }
 
-/* Get pointer to an upvalue in outer scope frame chain.
-   depth=0 is current frame, depth=1 is immediate outer, etc.
-   Returns NULL if depth exceeds the frame chain.
-   frame_val is a JSValue containing a JSFrame pointer. */
-
-void JS_ComputeMemoryUsage (JSRuntime *rt, JSMemoryUsage *s) {
-}
-
-void JS_DumpMemoryUsage (FILE *fp, const JSMemoryUsage *s, JSRuntime *rt) {
-}
-
 /* WARNING: obj is freed */
 JSValue JS_Throw (JSContext *ctx, JSValue obj) {
   ctx->current_exception = obj;
@@ -3080,39 +3021,6 @@ int JS_DeletePropertyKey (JSContext *ctx, JSValue obj, JSValue key) {
    Note: makes assumption about the bit pattern of the flags
 */
 
-/* return TRUE if 'obj' has a non empty 'name' string */
-static BOOL js_object_has_name (JSContext *ctx, JSValue obj) {
-  if (JS_VALUE_GET_TAG (obj) != JS_TAG_PTR) return FALSE;
-  JSRecord *rec = (JSRecord *)JS_VALUE_GET_OBJ (obj);
-  JSValue name_key = MIST_TryNewImmediateASCII ("name", 4);
-  int slot = rec_find_slot (rec, name_key);
-  if (slot <= 0) return FALSE;
-  JSValue val = rec->slots[slot].val;
-  if (!JS_IsText (val)) return TRUE;  /* has name but it's not a string = truthy */
-  return (js_string_value_len (val) != 0);
-}
-
-int JS_DefineObjectName (JSContext *ctx, JSValue obj, JSValue name) {
-  if (!JS_IsNull (name) && JS_IsGCObject (obj)
-      && !js_object_has_name (ctx, obj)) {
-    JSValue name_key = MIST_TryNewImmediateASCII ("name", 4);
-    if (JS_SetPropertyInternal (ctx, obj, name_key, name)
-        < 0)
-      return -1;
-  }
-  return 0;
-}
-
-int JS_DefineObjectNameComputed (JSContext *ctx, JSValue obj, JSValue str) {
-  if (JS_IsGCObject (obj) && !js_object_has_name (ctx, obj)) {
-    JSValue name_key = MIST_TryNewImmediateASCII ("name", 4);
-    if (JS_SetPropertyInternal (ctx, obj, name_key, str)
-        < 0)
-      return -1;
-  }
-  return 0;
-}
-
 int JS_DeleteProperty (JSContext *ctx, JSValue obj, JSValue prop) {
   JSRecord *rec;
   int slot;
@@ -4023,9 +3931,6 @@ __maybe_unused void JS_DumpGCObject (JSRuntime *rt,
     JS_DumpObject (rt, (JSRecord *)p);
   } else {
     switch (objhdr_type (*p)) {
-    case OBJ_CODE:
-      printf ("[function bytecode]");
-      break;
     case OBJ_ARRAY:
       printf ("[array]");
       break;
@@ -4091,73 +3996,10 @@ BOOL JS_StrictEq (JSContext *ctx, JSValue op1, JSValue op2) {
   return js_strict_eq (ctx, op1, op2);
 }
 
-__exception int js_operator_delete (JSContext *ctx, JSValue *sp) {
-  JSValue op1, op2;
-  int ret;
-
-  op1 = sp[-2];
-  op2 = sp[-1];
-
-  ret = JS_DeletePropertyKey (ctx, op1, op2);
-  if (unlikely (ret < 0)) return -1;
-  sp[-2] = JS_NewBool (ctx, ret);
-  return 0;
-}
-
-/* XXX: not 100% compatible, but mozilla seems to use a similar
-   implementation to ensure that caller in non strict mode does not
-   throw (ES5 compatibility) */
 static JSValue js_throw_type_error (JSContext *ctx, JSValue this_val, int argc, JSValue *argv) {
   return JS_ThrowTypeError (ctx, "invalid property access");
 }
 
-
-__exception int JS_CopyDataProperties (JSContext *ctx, JSValue target, JSValue source, JSValue excluded, BOOL setprop) {
-  JSValue keys, key, val;
-  uint32_t i, key_count;
-  int ret;
-
-  if (JS_VALUE_GET_TAG (source) != JS_TAG_PTR) return 0;
-
-  /* Get all string keys from source */
-  keys = JS_GetOwnPropertyNames (ctx, source);
-  if (JS_IsException (keys)) return -1;
-  if (js_get_length32 (ctx, &key_count, keys)) {
-    return -1;
-  }
-
-  for (i = 0; i < key_count; i++) {
-    key = JS_GetPropertyNumber (ctx, keys, i);
-    if (JS_IsException (key)) goto exception;
-
-    /* Check if key is excluded */
-    if (JS_VALUE_GET_TAG (excluded) == JS_TAG_PTR) {
-      /* Check if key exists in excluded object */
-      JSValue test = JS_GetProperty (ctx, excluded, key);
-      if (!JS_IsNull (test) && !JS_IsException (test)) {
-        continue;
-      }
-    }
-
-    /* Get property value from source */
-    val = JS_GetProperty (ctx, source, key);
-    if (JS_IsException (val)) {
-      goto exception;
-    }
-
-    /* Set property on target */
-    ret = JS_SetProperty (ctx, target, key, val);
-    if (ret < 0) goto exception;
-  }
-
-  return 0;
-
-exception:
-  return -1;
-}
-
-
-
 JSValue js_call_c_function (JSContext *ctx, JSValue func_obj, JSValue this_obj, int argc, JSValue *argv) {
   JSCFunctionType func;
   JSFunction *f;
@@ -4300,12 +4142,6 @@ JSValue JS_Call (JSContext *ctx, JSValue func_obj, JSValue this_obj, int argc, J
 /*******************************************************************/
 /* runtime functions & objects */
 
-int check_function (JSContext *ctx, JSValue obj) {
-  if (likely (JS_IsFunction (obj))) return 0;
-  JS_ThrowTypeError (ctx, "not a function");
-  return -1;
-}
-
 int check_exception_free (JSContext *ctx, JSValue obj) {
   return JS_IsException (obj);
 }
@@ -4402,7 +4238,7 @@ __exception int js_get_length32 (JSContext *ctx, uint32_t *pres, JSValue obj) {
     return 0;
   }
 
-  if (tag == JS_TAG_FUNCTION) {
+  if (JS_IsFunction (obj)) {
     JSFunction *fn = JS_VALUE_GET_FUNCTION (obj);
     *pres = fn->length;
     return 0;
@@ -10786,78 +10622,6 @@ void js_debug_sethook (JSContext *ctx, js_hook hook, int type, void *user) {
   ctx->trace_data = user;
 }
 
-uint32_t js_debugger_stack_depth (JSContext *ctx) {
-  return ctx->stack_depth;
-}
-
-/* return an array of the actual fn objects as a backtrace */
-JSValue js_debugger_backtrace_fns (JSContext *ctx) {
-/*  JSValue ret = JS_NewArray (ctx);
-  uint32_t stack_index = 0;
-
-  for (sf = ctx->current_stack_frame; sf != NULL; sf = sf->prev_frame) {
-    uint32_t id = stack_index++;
-    JS_SetPropertyNumber (ctx, ret, id, sf->cur_func);
-  }
-  return ret;
-*/
-}
-
-/* build a backtrace of info for printing */
-JSValue js_debugger_build_backtrace (JSContext *ctx) {
-/*
-  JSStackFrame *sf;
-  JSValue ret = JS_NewArray (ctx);
-  uint32_t stack_index = 0;
-
-  for (sf = ctx->current_stack_frame; sf != NULL; sf = sf->prev_frame) {
-    JSValue current_frame = JS_NewObject (ctx);
-    uint32_t id = stack_index++;
-    JS_SetPropertyStr (ctx, current_frame, "id", JS_NewUint32 (ctx, id));
-
-    const char *func_name_str = get_func_name (ctx, sf->cur_func);
-    if (!func_name_str || func_name_str[0] == '\0')
-      JS_SetPropertyStr (ctx, current_frame, "name", JS_NewString (ctx, "<anonymous>"));
-    else
-      JS_SetPropertyStr (ctx, current_frame, "name", JS_NewString (ctx, func_name_str));
-    JS_FreeCString (ctx, func_name_str);
-
-    JS_SetPropertyNumber (ctx, ret, id, current_frame);
-  }
-  return ret;
-*/
-}
-
-JSValue js_debugger_fn_info (JSContext *ctx, JSValue fn) {
-  (void)fn;
-  return JS_NewObject (ctx);
-}
-
-JSValue js_debugger_fn_bytecode (JSContext *ctx, JSValue fn) {
-  (void)fn;
-  return JS_NewArray (ctx);
-}
-
-JSValue js_debugger_local_variables (JSContext *ctx, int stack_index) {
-  (void)stack_index;
-  return JS_NewObject (ctx);
-}
-
-void js_debugger_set_closure_variable (JSContext *ctx, JSValue fn, JSValue var_name, JSValue val) {
-  /* TODO: Reimplement using outer_frame mechanism if debugging is needed */
-  (void)ctx; (void)fn; (void)var_name; (void)val;
-}
-
-JSValue js_debugger_closure_variables (JSContext *ctx, JSValue fn) {
-  /* TODO: Reimplement using outer_frame mechanism if debugging is needed */
-  (void)fn;
-  return JS_NewObject (ctx);
-}
-
-void *js_debugger_val_address (JSContext *ctx, JSValue val) {
-  return JS_VALUE_GET_PTR (val);
-}
-
 /* ============================================================================
  * Cell Script Module: json
  * Provides json.encode() and json.decode() using pure C implementation