open-code-review

Open Code Review (the ocr command) is an AI code review tool that began as Alibaba's internal review assistant. It reads a Git diff, sends the changed files to an LLM you configure, and returns structured comments pointing at exact lines. The agent can open whole files, search the codebase and look at other changed files, so the feedback goes beyond the diff itself.

The README says general-purpose agents used for review tend to skip files on big changes, report wrong line numbers, and give uneven quality. This tool answers that with a hybrid design. Plain code decides which files get reviewed, groups related files into bundles that each run as a sub-agent, matches review rules to each file, and runs separate modules that check where comments land and whether they hold up. The LLM agent handles the judgment calls and fetching extra context.

The README compares it with Claude Code used for review. On the authors' own benchmark of 200 real pull requests, they report higher precision and F1 with the same model, about one ninth of the tokens, and lower recall. Treat those numbers as the project's own claims.