diff --git a/internal/engine.cm b/internal/engine.cm
index b6a26349..73009edc 100644
--- a/internal/engine.cm
+++ b/internal/engine.cm
@@ -73,7 +73,21 @@ function ensure_build_dir() {
   return dir
 }
 
-// Load a pipeline module from cache, with boot/ seed fallback
+// Load a boot seed module (for compiling pipeline modules on cache miss)
+function boot_load(name) {
+  var mcode_path = core_path + '/boot/' + name + '.cm.mcode'
+  var mcode_blob = null
+  var mach_blob = null
+  if (!fd.is_file(mcode_path)) {
+    print("error: missing boot seed: " + name + "\n")
+    disrupt
+  }
+  mcode_blob = fd.slurp(mcode_path)
+  mach_blob = mach_compile_mcode_bin(name, text(mcode_blob))
+  return mach_load(mach_blob, {use: use_embed})
+}
+
+// Load a pipeline module from cache; on miss compile from source via boot chain
 function load_pipeline_module(name, env) {
   var source_path = core_path + '/' + name + '.cm'
   var source_blob = null
@@ -82,14 +96,48 @@ function load_pipeline_module(name, env) {
   var mcode_path = null
   var mcode_blob = null
   var mach_blob = null
+  var src = null
+  var boot_tok = null
+  var boot_par = null
+  var boot_fld = null
+  var boot_mc = null
+  var tok_result = null
+  var ast = null
+  var compiled = null
+  var mcode_json = null
   if (fd.is_file(source_path)) {
     source_blob = fd.slurp(source_path)
     hash = content_hash(source_blob)
     cached = cache_path(hash)
     if (cached && fd.is_file(cached))
       return mach_load(fd.slurp(cached), env)
+
+    // Cache miss: compile from source using boot seed pipeline
+    mcode_path = core_path + '/boot/' + name + '.cm.mcode'
+    if (fd.is_file(mcode_path)) {
+      boot_tok = boot_load("tokenize")
+      boot_par = boot_load("parse")
+      boot_fld = boot_load("fold")
+      boot_mc = boot_load("mcode")
+      src = text(source_blob)
+      tok_result = boot_tok(src, source_path)
+      ast = boot_par(tok_result.tokens, src, source_path, boot_tok)
+      if (ast.errors != null && length(ast.errors) > 0) {
+        print("error: failed to compile pipeline module: " + name + "\n")
+        disrupt
+      }
+      ast = boot_fld(ast)
+      compiled = boot_mc(ast)
+      mcode_json = json.encode(compiled)
+      mach_blob = mach_compile_mcode_bin(name, mcode_json)
+      if (cached) {
+        ensure_build_dir()
+        fd.slurpwrite(cached, mach_blob)
+      }
+      return mach_load(mach_blob, env)
+    }
   }
-  // Boot seed fallback
+  // Last resort: boot seed as runtime (no source file found)
   mcode_path = core_path + '/boot/' + name + '.cm.mcode'
   if (fd.is_file(mcode_path)) {
     mcode_blob = fd.slurp(mcode_path)
diff --git a/mcode.cm b/mcode.cm
index 55377aa3..e259efc7 100644
--- a/mcode.cm
+++ b/mcode.cm
@@ -22,6 +22,12 @@ var mcode = function(ast) {
     "~!": "bitnot", "[]!": "load"
   }
 
+  var binop_sym = {
+    add: "+", subtract: "-", multiply: "*", divide: "/",
+    modulo: "%", pow: "**",
+    lt: "<", le: "<=", gt: ">", ge: ">="
+  }
+
   var compound_map = {
     "+=": "add", "-=": "subtract", "*=": "multiply", "/=": "divide",
     "%=": "modulo", "&=": "bitand", "|=": "bitor", "^=": "bitxor",
@@ -67,6 +73,7 @@ var mcode = function(ast) {
   var _bp_right = 0
   var _bp_ln = null
   var _bp_rn = null
+  var _bp_op_sym = null
 
   // State save/restore for nested function compilation
   var save_state = function() {
@@ -240,6 +247,27 @@ var mcode = function(ast) {
     emit_1("null", dest)
   }
 
+  var emit_log_error = function(msg) {
+    var log_slot = alloc_slot()
+    add_instr(["access", log_slot, {kind: "name", name: "log", make: "intrinsic"}])
+    var name_slot = alloc_slot()
+    emit_const_str(name_slot, "error")
+    var msg_slot = alloc_slot()
+    emit_const_str(msg_slot, msg)
+    var args_arr = alloc_slot()
+    add_instr(["array", args_arr, 0])
+    emit_2("push", args_arr, msg_slot)
+    var result = alloc_slot()
+    var frame_slot = alloc_slot()
+    emit_3("frame", frame_slot, log_slot, 2)
+    var null_slot = alloc_slot()
+    emit_1("null", null_slot)
+    emit_3("setarg", frame_slot, 0, null_slot)
+    emit_3("setarg", frame_slot, 1, name_slot)
+    emit_3("setarg", frame_slot, 2, args_arr)
+    emit_2("invoke", frame_slot, result)
+  }
+
   var emit_jump = function(label) {
     add_instr(["jump", label])
   }
@@ -321,6 +349,7 @@ var mcode = function(ast) {
     emit_jump(done)
 
     emit_label(err)
+    emit_log_error("cannot apply '+': operands must both be text or both be numbers")
     emit_0("disrupt")
     emit_label(done)
     return null
@@ -345,6 +374,7 @@ var mcode = function(ast) {
     emit_jump(done)
 
     emit_label(err)
+    emit_log_error("cannot apply '" + _bp_op_sym + "': operands must be numbers")
     emit_0("disrupt")
     emit_label(done)
     return null
@@ -569,6 +599,7 @@ var mcode = function(ast) {
     emit_jump(done)
 
     emit_label(err)
+    emit_log_error("cannot compare with '" + _bp_op_sym + "': operands must be same type")
     emit_0("disrupt")
     emit_label(done)
     return null
@@ -589,6 +620,7 @@ var mcode = function(ast) {
     emit_jump(done)
 
     emit_label(err)
+    emit_log_error("cannot negate: operand must be a number")
     emit_0("disrupt")
     emit_label(done)
     return null
@@ -607,6 +639,7 @@ var mcode = function(ast) {
     _bp_dest = dest
     _bp_left = left
     _bp_right = right
+    _bp_op_sym = binop_sym[op_str] || op_str
     if (op_str == "add") {
       emit_add_decomposed()
     } else if (op_str == "eq") {
@@ -760,6 +793,7 @@ var mcode = function(ast) {
 
     // Error path: non-text key on function disrupts
     emit_label(error_path)
+    emit_log_error("cannot access: key must be text")
     emit_0("disrupt")
     emit_jump(done_label)
 
@@ -1427,6 +1461,7 @@ var mcode = function(ast) {
       emit_2("push", arr_slot, val_slot)
       emit_jump(guard_done)
       emit_label(guard_err)
+      emit_log_error("cannot push: target must be an array")
       emit_0("disrupt")
       emit_label(guard_done)
       return val_slot
@@ -1785,6 +1820,7 @@ var mcode = function(ast) {
           emit_2("push", a0, a1)
           emit_jump(guard_done)
           emit_label(guard_err)
+          emit_log_error("cannot push: target must be an array")
           emit_0("disrupt")
           emit_label(guard_done)
           return a1
@@ -2156,6 +2192,7 @@ var mcode = function(ast) {
           emit_2("pop", local_slot, arr_slot)
           emit_jump(guard_done)
           emit_label(guard_err)
+          emit_log_error("cannot pop: target must be an array")
           emit_0("disrupt")
           emit_label(guard_done)
         }
diff --git a/parse.cm b/parse.cm
index dc52a372..07c7f185 100644
--- a/parse.cm
+++ b/parse.cm
@@ -437,7 +437,14 @@ var parse = function(tokens, src, filename, tokenizer) {
         }
         push(list, pair)
         if (tok.kind == ",") advance()
-        else break
+        else if (tok.kind == "{") {
+          if (right && right.kind == "(") {
+            parse_error(tok, "unexpected '{' after property value; use method shorthand `name(args) { ... }` or `name: function(args) { ... }`")
+          } else {
+            parse_error(tok, "expected ',' or '}' in object literal")
+          }
+          break
+        } else break
       }
       ast_node_end(node)
       if (tok.kind == "}") advance()
diff --git a/source/mach.c b/source/mach.c
index ec8daa77..fca17c28 100644
--- a/source/mach.c
+++ b/source/mach.c
@@ -2124,41 +2124,45 @@ JSValue JS_CallRegisterVM(JSContext *ctx, JSCodeRegister *code,
         if (code->disruption_pc > 0 && frame_pc < code->disruption_pc) {
           env = fn->u.reg.env_record;
           pc = code->disruption_pc;
+          ctx->disruption_reported = FALSE;
           break;
         }
         if (JS_IsNull(frame->caller)) {
-          const char *fn_name = code->name_cstr ? code->name_cstr : "<anonymous>";
-          const char *file = code->filename_cstr ? code->filename_cstr : "<unknown>";
-          uint16_t line = 0, col = 0;
-          if (code->line_table && frame_pc > 0 && frame_pc - 1 < code->instr_count) {
-            line = code->line_table[frame_pc - 1].line;
-            col = code->line_table[frame_pc - 1].col;
-          }
-          fprintf(stderr, "unhandled disruption in %s (%s:%u:%u)\n", fn_name, file, line, col);
-          /* Walk and print the frame chain as a stack trace */
-          {
-            JSFrameRegister *trace_frame = (JSFrameRegister *)JS_VALUE_GET_PTR(frame_ref.val);
-            int first = 1;
-            while (trace_frame) {
-              if (!mist_is_function(trace_frame->function)) break;
-              JSFunction *trace_fn = JS_VALUE_GET_FUNCTION(trace_frame->function);
-              if (trace_fn->kind == JS_FUNC_KIND_REGISTER && trace_fn->u.reg.code) {
-                JSCodeRegister *tc = trace_fn->u.reg.code;
-                uint32_t tpc = first ? (frame_pc > 0 ? frame_pc - 1 : 0)
-                                     : (uint32_t)(JS_VALUE_GET_INT(trace_frame->address) >> 16);
-                uint16_t tl = 0, tcol = 0;
-                if (tc->line_table && tpc < tc->instr_count) {
-                  tl = tc->line_table[tpc].line;
-                  tcol = tc->line_table[tpc].col;
-                }
-                fprintf(stderr, "    at %s (%s:%u:%u)\n",
-                        tc->name_cstr ? tc->name_cstr : "<anonymous>",
-                        tc->filename_cstr ? tc->filename_cstr : "<unknown>", tl, tcol);
-              }
-              if (JS_IsNull(trace_frame->caller)) break;
-              trace_frame = (JSFrameRegister *)JS_VALUE_GET_PTR(trace_frame->caller);
-              first = 0;
+          if (!ctx->disruption_reported) {
+            const char *fn_name = code->name_cstr ? code->name_cstr : "<anonymous>";
+            const char *file = code->filename_cstr ? code->filename_cstr : "<unknown>";
+            uint16_t line = 0, col = 0;
+            if (code->line_table && frame_pc > 0 && frame_pc - 1 < code->instr_count) {
+              line = code->line_table[frame_pc - 1].line;
+              col = code->line_table[frame_pc - 1].col;
             }
+            fprintf(stderr, "unhandled disruption in %s (%s:%u:%u)\n", fn_name, file, line, col);
+            /* Walk and print the frame chain as a stack trace */
+            {
+              JSFrameRegister *trace_frame = (JSFrameRegister *)JS_VALUE_GET_PTR(frame_ref.val);
+              int first = 1;
+              while (trace_frame) {
+                if (!mist_is_function(trace_frame->function)) break;
+                JSFunction *trace_fn = JS_VALUE_GET_FUNCTION(trace_frame->function);
+                if (trace_fn->kind == JS_FUNC_KIND_REGISTER && trace_fn->u.reg.code) {
+                  JSCodeRegister *tc = trace_fn->u.reg.code;
+                  uint32_t tpc = first ? (frame_pc > 0 ? frame_pc - 1 : 0)
+                                       : (uint32_t)(JS_VALUE_GET_INT(trace_frame->address) >> 16);
+                  uint16_t tl = 0, tcol = 0;
+                  if (tc->line_table && tpc < tc->instr_count) {
+                    tl = tc->line_table[tpc].line;
+                    tcol = tc->line_table[tpc].col;
+                  }
+                  fprintf(stderr, "    at %s (%s:%u:%u)\n",
+                          tc->name_cstr ? tc->name_cstr : "<anonymous>",
+                          tc->filename_cstr ? tc->filename_cstr : "<unknown>", tl, tcol);
+                }
+                if (JS_IsNull(trace_frame->caller)) break;
+                trace_frame = (JSFrameRegister *)JS_VALUE_GET_PTR(trace_frame->caller);
+                first = 0;
+              }
+            }
+            ctx->disruption_reported = TRUE;
           }
           result = JS_Throw(ctx, JS_NULL);
           frame = (JSFrameRegister *)JS_VALUE_GET_PTR(frame_ref.val);
diff --git a/source/quickjs-internal.h b/source/quickjs-internal.h
index c2a2f5b9..db62d759 100644
--- a/source/quickjs-internal.h
+++ b/source/quickjs-internal.h
@@ -1147,6 +1147,8 @@ struct JSContext {
 
   JSValue current_exception;
 
+  JS_BOOL disruption_reported;
+
   /* Actor identity key — used by wota/nota PRIVATE serialization */
   JSValue actor_sym;
 
diff --git a/tests/errors.cm b/tests/errors.cm
new file mode 100644
index 00000000..9cb682b1
--- /dev/null
+++ b/tests/errors.cm
@@ -0,0 +1,153 @@
+// Runtime type error tests — verify each type mismatch disrupts correctly
+return {
+  test_text_plus_array_disrupts: function() {
+    var caught = false
+    var fn = function() {
+      var x = "hello" + [1, 2, 3]
+    } disruption {
+      caught = true
+    }
+    fn()
+    if (!caught) return "text + array should disrupt"
+  },
+
+  test_number_plus_text_disrupts: function() {
+    var caught = false
+    var fn = function() {
+      var x = 1 + "hello"
+    } disruption {
+      caught = true
+    }
+    fn()
+    if (!caught) return "number + text should disrupt"
+  },
+
+  test_number_plus_array_disrupts: function() {
+    var caught = false
+    var fn = function() {
+      var x = 1 + [1, 2]
+    } disruption {
+      caught = true
+    }
+    fn()
+    if (!caught) return "number + array should disrupt"
+  },
+
+  test_text_multiply_disrupts: function() {
+    var caught = false
+    var fn = function() {
+      var x = "hello" * 2
+    } disruption {
+      caught = true
+    }
+    fn()
+    if (!caught) return "text * number should disrupt"
+  },
+
+  test_text_divide_disrupts: function() {
+    var caught = false
+    var fn = function() {
+      var x = "hello" / 2
+    } disruption {
+      caught = true
+    }
+    fn()
+    if (!caught) return "text / number should disrupt"
+  },
+
+  test_text_modulo_disrupts: function() {
+    var caught = false
+    var fn = function() {
+      var x = "hello" % 2
+    } disruption {
+      caught = true
+    }
+    fn()
+    if (!caught) return "text % number should disrupt"
+  },
+
+  test_array_subtract_disrupts: function() {
+    var caught = false
+    var fn = function() {
+      var x = [1] - 2
+    } disruption {
+      caught = true
+    }
+    fn()
+    if (!caught) return "array - number should disrupt"
+  },
+
+  test_negate_text_disrupts: function() {
+    var caught = false
+    var s = "hello"
+    var fn = function() {
+      return -s
+    } disruption {
+      caught = true
+    }
+    fn()
+    if (!caught) return "negate text should disrupt"
+  },
+
+  test_push_on_non_array_disrupts: function() {
+    var caught = false
+    var fn = function() {
+      var x = "hello"
+      x[] = 1
+    } disruption {
+      caught = true
+    }
+    fn()
+    if (!caught) return "push on non-array should disrupt"
+  },
+
+  test_pop_on_non_array_disrupts: function() {
+    var caught = false
+    var s = "hello"
+    var fn = function() {
+      var v = s[]
+      return v
+    } disruption {
+      caught = true
+    }
+    fn()
+    if (!caught) return "pop on non-array should disrupt"
+  },
+
+  test_comparison_type_mismatch_disrupts: function() {
+    var caught = false
+    var fn = function() {
+      var x = "hello" < [1]
+    } disruption {
+      caught = true
+    }
+    fn()
+    if (!caught) return "text < array should disrupt"
+  },
+
+  test_explicit_disrupt_works: function() {
+    var caught = false
+    var fn = function() {
+      disrupt
+    } disruption {
+      caught = true
+    }
+    fn()
+    if (!caught) return "explicit disrupt should be caught"
+  },
+
+  test_valid_add_text: function() {
+    var x = "hello" + " world"
+    if (x != "hello world") return "text + text should work"
+  },
+
+  test_valid_add_numbers: function() {
+    var x = 1 + 2
+    if (x != 3) return "number + number should work"
+  },
+
+  test_valid_comparison: function() {
+    if (!(1 < 2)) return "1 < 2 should be true"
+    if (!("a" < "b")) return "a < b should be true"
+  }
+}