SLM Agent scans your codebase for AI API calls and generates a structured migration plan showing exactly where you can swap frontier LLM calls (Opus) for Small Language Models API calls like Haiku or Sonnet. It performs deep cross-file analysis: tracing prompts to their construction site, following callers across files, and classifying each call by what it actually does. Each finding includes a complexity score, confidence level, estimated savings, and for multi-task calls, a step-by-step decomposition. The output is a saved report.md in your project with a full API reference, so you can migrate. No source code or codebase data is sent to any external server (except Claude) during analysis.