Stability improvements #2

[noelsaw1]

⚠️ Function Boundary Detection (Heuristic)
Uses grep to find function start/end

Could fail on closures, anonymous functions, or class methods
Impact: Low - mitigation detection may include extra context
Grade: A (95/100) - acceptable for current use case

⚠️ Loop Detection (Heuristic)
Checks ±20 lines