The hardest part of automating office work often happens before an AI agent takes its first action: figuring out what employees actually do. A workflow might cross an inbox, a spreadsheet and several business applications, with its exceptions understood by the team but never captured in a formal specification. Marble Cognition has raised $3.75 million in pre-seed funding to turn that operational knowledge into AI coworkers. Heartcore and Seedcamp co-led the round. Angel participants include a…