Class RunCheckpoint

Deterministic assertions, checked every step at no cost. visible/absent require RunComputerUseParams.ElementGrounding. Preferred — most sections are URL-identifiable.

Plan hint appended to the goal, and the criterion text in the synthesized final verdict.

Stable label for the section, e.g. "agents-list".

Criteria requiring an LLM judge (e.g. "the chart rendered with bars"). Latched when a judge call reports all of them met.