save_memorylisted

Save this to project memory: $ARGUMENTS **First check the memory tier is enabled.** If `.agents/memory/` does not exist, this project declined the memory tier (`--memory none`) — do **not** create it. Tell the user memory is not enabled here and stop. Otherwise, follow the memory convention in `.agents/memory/README.md`: 1. Decide the memory type (user / feedback / project / reference) 2. Choose a descriptive filename (e.g., `feedback_testing.md`, `project_deadline.md`) 3. Check if an existing memory file already covers this — update it instead of duplicating 4. Write the file with proper frontmatter (name, description, type) 5. Add a one-line entry to `.agents/memory/MEMORY.md`