Vidhaan Appaji; Lokesh Upputri; Senthil Arasu T; Daksha S. Small Models, Precisely Tuned: A Two-Tier Small-Language-Model Architecture for Autonomous Penetration Testing Soft-Prompt-Tuned Strategic Reasoning Paired With a LoRA-Fine-Tuned Tool-Calling Executor, Evaluated Against VAmPI and OWASP Juice Shop. IJISEM 2026, 5 (4), 229-243. https://doi.org/10.69968/ijisem.2026v5i4229-243.