Assign Target Setter Readback

Use [minimal Object.assign example], [property descriptors] and [JavaScript runtime]. Produce a 55-second code-review explanation of the target setter side effect in the supplied assignment example. State which operations ran and avoid saying every copying technique has identical semantics.

Use only the supplied facts and approved wording. If a necessary script or timing reference is missing, ask for it first. Produce the audio when supported; otherwise return the complete spoken script with pauses and a short production cue sheet, clearly labeled as a script. Use original voices and keep speech intelligible without music. Never claim an audio file exists unless it was generated.