Task as markdown for a given phase. Does not add section headings (e.g. `## Task`); caller adds header. COARSE: creation keys. REFINEMENT/EXECUTION: task list + `## Tool Calls` when tools exist. POST_EXEC: task list only (no Tool Calls). LIST: task list + ##### Result summary when exec_done.
| phase |
which phase (COARSE, REFINEMENT, LIST, REFINE_COMPLETED, EXECUTION, POST_EXEC) |
|
markdown string for this phase |