ASE is a macOS workbench for handing software changes to an agent. You describe the change, often straight from a GitHub issue, and the agent works in an isolated copy of the project. Your folder changes only when you keep the result.
Each mission runs in a cell: an isolated worktree with its own dependencies and processes, stopped with the cell. A change counts as done only on evidence: tests, diagnostics, a review, each acceptance criterion judged against that exact version, and probes of what is running. Keeping is a separate step, checked against the plan you reviewed, recorded in the project journal, and reversible.
Status In development; the Mac app, engine and mission flow exist in the repo, and no public release is stated.