history

pixelkiln history
pixelkiln history --only anvil --style base
pixelkiln history --json

List, per asset, the current generation and the ones it replaced, newest first, with each one's hash, download time, object id, and whether the prompt differed. --json prints the records as the lockfile keeps them. A regeneration keeps the generation it replaces up to a limit. The personal default is PIXELKILN_HISTORY in the environment (5 unless set, 0 keeps none); a manifest's top-level history overrides it for that project. The bytes of every kept generation survive cache --prune, and the provider objects were never deleted. Restore one with restore --generation.

The paid-work states have one safe next step:

Lock state	Resume command
pending, processing	pixelkiln poll
review	pixelkiln pick
selected, download-failed	pixelkiln fetch
downloaded with a missing file	pixelkiln restore

plan, doctor, and each pipeline stage name these commands. None submits a new generation. Missing recovery ids are reported by doctor instead of being presented as resumable work.