Resolving Nano Banana 2 thought_signature 400 error: multi-turn image editing must return the thought signature
Author's Note: Getting a "Image part is missing a thought_signature" error with Nano Banana 2? This is a 400 error caused by failing to pass back the thought signature during multi-turn conversations. This article explains the cause, provides solutions, and includes code examples. If you've encountered this error while editing images with Nano Banana 2…
