Refinement: fill template. Caller has validated via skill_manager.validate(this); definition from this.skill is non-null. task_reference_contents comes from reference_contents() → ResolveLink after preload_links (this.references only) in this loop. Up to 5 refinement attempts; up to 3 communication retries per attempt. Caller (Runner) must catch and report to user; see 1.23.14.