Inputs
task_dir= "$0"fix_cycle= "$1" (optional)fix_threshold= "$2" (optional):critical,warning, orsuggestion.
Process
Use Tool Agent to spawn lissom-planner, passing: task_dir, fix_cycle, and fix_threshold.
Completion
Return to the caller only after <task_dir>/Plan.md exists
and contains at least one step. If it does not exist, re-invoke the agent once
before escalating.