AI Code Reviewers Won't Save You

Dropping an AI reviewer into your pull request pipeline is just a band-aid. Tools like CodeRabbit or Greptile are great for catching syntax errors or basic anti-patterns, but they can’t assess architectural intent or domain-specific business logic. They’re spell-checkers for code. Useful, sure. But nobody ever said “our codebase is solid because we run spell check.”

AI doesn’t change your engineering baseline. It just accelerates it. If your foundational guardrails are weak, agentic tools will help your team generate technical debt at unprecedented speeds. So the real question isn’t “how do we review AI code?” It’s “how do we build systems that prevent slop from ever reaching production?”

Shift Left, Hard

When engineers use agents to scaffold a new Go service or spin up a SvelteKit frontend, they’re inevitably pulling in generated dependencies or utilizing unfamiliar libraries. Models hallucinate packages. They suggest insecure patterns with total confidence.

Your CI pipeline needs to be ruthless before a human ever looks at the code. Aggressive SAST and SCA should automatically block PRs that introduce vulnerable dependencies or hardcoded secrets. If the agent generates slop, the pipeline rejects it instantly. No discussion.

Make the Agents Write the Tests

Agents are incredibly eager to generate feature code, but humans are historically lazy about writing the tests for it. The influx of AI-generated code means human reviewers can’t possibly step through every logic branch manually.

So flip the script. Use the agentic tools to build the guardrails themselves. Mandate that any generated feature code must be accompanied by generated, human-verified unit tests. If an agent writes a sprawling TypeScript function, the build should fail if the test coverage doesn’t meet a strict threshold. You’re already using AI to write the code. Use it to prove the code works, too.

Context Boundaries Matter

Bloated AI output often happens because the model is given too much context or allowed to generate too much at once. Heavyweight IDEs with aggressive multi-file auto-completion can easily create cascading messes across a codebase.

Define strict architectural boundaries and API contracts upfront. Agents should be tasked with solving small, well-defined, modular problems. “Write a function that parses this specific JSON schema” is a good prompt. “Build the backend” is not. The tighter the scope, the less room for generated nonsense.

Observability Is Your Safety Net

You can’t catch all generated slop at the PR level. Some of it only reveals itself under load. An agent might write a technically correct query that causes an N+1 database issue, or introduce a subtle memory leak that passes all unit tests.

Your ultimate safety net is what happens at runtime. You need an airtight observability stack to trust the velocity AI brings. Logs, distributed tracing, metrics, all feeding into dashboards your team actually watches. When generated code hits staging, you need the immediate telemetry to spot performance regressions before they reach production.

Redefine the Human Review

Because AI makes the “typing” part of coding trivial, the human code review needs to fundamentally shift. Reviewers should no longer be looking for missing semicolons. They should be asking: “Does this component fit our architecture?” and “Did the agent over-engineer this solution?”

Train your senior engineers to review for intent and systemic impact. That’s the stuff AI genuinely can’t do yet. Leave the syntax checking to the robots.

I’d appreciate a follow. You can subscribe with your email below. The emails go out once a week, or you can find me on Mastodon at @[email protected].

/ DevOps / AI / Software-development / Code-review