The Automatic1111-style block
A common PNG entry named parameters begins with the positive prompt, may include a line beginning “Negative prompt,” and ends with comma-separated fields such as steps, sampler, CFG scale, seed, image size, model hash, and model name.
What is separated
The reader presents the positive and negative prompt as editorial text, then turns the settings line into a field ledger. Unknown fields are preserved rather than discarded, so extensions can remain visible.
Use the record as a clue, not a promise
A prompt and seed may not recreate the same pixels if the checkpoint, VAE, LoRAs, scheduler, software version, or nondeterministic operation differs. Preserve the original models and environment when exact repeatability matters.
Why metadata disappears
JPEG conversion, image optimization, editor export settings, social networks, and screenshots can remove the original parameter block. The absence of fields is not an AI detector result.