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Code Review Assistant with Repo-Aware RAG

A review assistant that grounds LLM suggestions in the actual codebase, past PRs, and architecture decisions.

LangChainOpenAI APIFastAPIFAISS
Abstract indigo and amber cover illustration for the Code Review Assistant project, showing a symbol-graph constellation with amber change-impact arcs.

Highlights

  • AST-aware chunking and symbol-graph retrieval for cross-file context.
  • Change-impact summaries derived from call-graph diffs.
  • Inline PR comments with reviewer overrides feeding an evaluation loop.

Outcomes

  • Reduced mean time to first review by 42% on active repos.
  • Caught 3.1x more regression risks than a plain diff-only LLM baseline.

Stack

  • LangChain
  • OpenAI API
  • FastAPI
  • FAISS
  • PostgreSQL