I thought about building an PR review powered by AI, and the more I challenged the idea in my mind, the more I think the MoE pattern is the best suited for it to prevent the maximum of hallucinations while creating a virtuous circle of discussions between you and the experts (or even between the experts themselves).
If you go / inspire from this, you may want to start supporting a small subset of technologies like React or Laravel projects, in order to provide the bests set of experts pre-configured with clear prompts so that it gets relevant in PR reviews.
I also think a big part of making this tool useful for entreprise will be the ability to provide some level of customizations, like specific guidelines/linting rules (for example, Domain Driven architecture, or monolithic approaches, etc...