feat: remove heuristics, go LLM-only with mocks + restructure
BREAKING: Heuristic fallback removed — LLM client now required
Changes:
- Remove extractFileHeuristic, extractPackageHeuristic, all helpers
- extractFileLLM / extractPackageLLM now throw LLMError when client missing
- Add hybrid binary detection: extension blacklist + content sniffing
- Increase file size limit: 50KB → 500KB (text files only)
- Restructure src/ into subdirectories:
- src/llm/ — all LLM clients, extract, batch, cache, error
- src/ast/ — AST extraction
- src/cli/ — CLI entry point
- Update all imports across codebase and tests
- Add tests/mock-llm.ts helper for deterministic mock clients
- Update all tests to use mock LLM clients (no heuristics dependency)
- All 52 tests passing (including 8 real LLM integration tests)
alex
2f198ea0d2