Stephen
@hejun789
Studying Information System Security, Exploring AI/ML applications in security. Lifelong Learner & Devout Student.
3
Published Tools
3
Total Stars
0
Weekly Downloads
5
GitHub Followers
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Public Repos
100/100
Avg Security
Published Tools
1 MCP Server2 Agentsacross 1 categoryhejun789
Autonomous cybersecurity threat intelligence agent — port scan, WHOIS, DNS, VirusTotal & AI-powered analysis with IOC extraction and cross-investigation memory.
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Agentic RAG document Q&A — a tool-using LLM agent with multi-hop retrieval, self-correction, and grounded page citations. Two-stage retrieval (bi-encoder + cross-encoder), plus retrieval & faithfulness evals. Flask · LangChain · ChromaDB · OpenRouter.
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AI voice receptionist for clinics: books, reschedules and cancels real appointments via LLM tool calls, in English and 中文. Eval-driven debugging: 53% → 87% across 30 scripted caller scenarios.
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