# Jina

> Documentation for Jina, the autonomous AI QA engineer for pull requests.

- [Jina](https://docs.usejina.com/index.md): Jina is an autonomous AI QA engineer that executes your code to find runtime issues in important flows and pull requests.
- [How Jina works](https://docs.usejina.com/overview/how-jina-works.md): Follow a Jina review from system context through runtime investigation and merge scoring.
- [Context layer](https://docs.usejina.com/concepts/context-layer.md): Understand how Jina connects code, infrastructure, runtime behavior, and issue history to reason about change impact.
- [Runtime investigation](https://docs.usejina.com/concepts/runtime-investigation.md): Learn how Jina validates risky behavior by executing targeted probes in isolated environments.
- [Findings and merge score](https://docs.usejina.com/concepts/findings-and-merge-score.md): Understand the evidence Jina reports and how the merge score summarizes review risk.
- [Security](https://docs.usejina.com/security.md): Review Jina's isolated execution, data perimeter, credential, deployment, and audit controls.
- [FAQ](https://docs.usejina.com/faq.md): Answers to common questions about Jina's autonomous pull request reviews, execution model, and security.