Intent of runSubagentTool.test|title=RunSubagentTool model fallback behavior uses subagent model when it has equal multiplier|occurrence=1, runSubagentTool.test|title=RunSubagentTool model fallback behavior uses subagent model when it has lower multiplier|occurrence=1, +3

All 5 exact tests in this concept. Every test is marked by where it enters the hierarchy.