# Code Review Agent: A Fresh, Independent Review Before Release > The Code Review Agent is the AI code review agent in the Ai1 platform by MyZone AI that reads newly written code with no context from the session that wrote it and reports security gaps, logic errors and drift from the plan, each pinned to file and line, without changing a line itself. Canonical page: https://myzone.ai/pages/agents/ai-code-review-agent Part of Ai1, by MyZone AI. Book a code review walkthrough: https://calendly.com/d/ct6h-tcy-8qf/ai1-demo?a1=Code%20Review%20Agent&utm_source=myzone.ai&utm_medium=agent-page&utm_content=ai-code-review-agent-final Last updated: 2026-10-05. Reviewed by the MyZone AI team. A fresh pair of eyes on new code, before anything ships. ## At a glance - **What it reads:** The changed files and a short summary of what was built - **What it looks for:** Security gaps, logic errors, performance traps and drift from the plan - **Each finding:** Graded CRITICAL, HIGH, MEDIUM or LOW, pinned to file and line, with a concrete fix - **Action list:** P0 blocks the merge, P1 before the next milestone, P2 can wait - **When it runs:** At each milestone on larger builds, or whenever you ask - **What it never does:** Write, fix, approve or merge code ## What the Code Review Agent does - **Reads the change cold:** It reviews the changed code with no context from the session that wrote it, the way an outside reviewer would. That distance is what makes the review useful. - **Looks for security and reliability risks:** It checks for leaked secrets, gaps in logins and permissions, SQL injection risks, unhandled errors and performance traps such as loops with no limit or blocking calls on busy paths. - **Grades and pins every finding:** Each finding is graded CRITICAL, HIGH, MEDIUM or LOW, tied to the exact file and line, and comes with a concrete suggestion rather than vague advice. - **Compares the code with the plan:** It checks the new code against your architecture and the original brief, and lists the places where the build drifted from what was approved. - **Turns findings into an action list:** Issues are sorted into P0 (block the merge), P1 (fix before the next milestone) and P2 (can be deferred), so the team knows what to tackle first. - **Checks everyday code quality:** It also flags naming problems, missing error handling, repeated code, hardcoded values and gaps in test coverage. ## How the Code Review Agent differs from a style checker A typical style checker flags rule breaks line by line. The Code Review Agent reads the whole change with no context from the session that wrote it, looks for security and logic problems, compares the code with your architecture and brief, and sorts what it finds into P0, P1 and P2. It never writes, fixes, approves or merges code, so the writer and the reviewer stay separate. How this differs from the QA Orchestrator (https://myzone.ai/pages/agents/ai-qa-agent): the QA Orchestrator plans the checks a change needs and gives one combined verdict, while the Code Review Agent supplies the independent code review that feeds into it. ## How it works 1. **Receive the change** (At a milestone, or when you ask): The changed files and a short summary of what was built arrive from you or from the agent running the build. 2. **Audit the code** (First pass over the change): It checks for security issues, style problems, performance traps and gaps in test coverage. 3. **Check best practices** (In the same review): It looks at naming, error handling, repeated code and hardcoded values. 4. **Check against the plan** (Before the report): It compares the code with your architecture and brief to find anything that drifted from the approved direction. 5. **Deliver the report** (Before the next step begins): You get a graded report with a prioritised action list, and the findings go to the Developer to fix. ## When to use it - **A build reaches a milestone and you want to know if it is safe to move on:** It reads the changes, checks for security issues and drift from the plan, and returns a graded report before the next step begins. - **You want a second look before changes go to production:** It reviews the change and comes back with findings sorted by severity and a clear P0, P1 and P2 action list. - **You suspect the new code no longer matches what was agreed:** It cross-checks the code against your architecture and brief and lists every contradiction it finds. - **A small change needs a quick sanity check:** Ask for a review at any time, even outside a larger build, and get the same structured report. ## What you get - A graded review report, with every finding pinned to its file and line - A concrete suggested fix for each finding - A P0, P1 and P2 action list in priority order - A list of places where the code contradicts the approved plan - A plain clean-pass note when nothing above MEDIUM is found ## Example: Contact import code review Example with a fictional company. Names, people and figures are invented to show the agent's output. Any resemblance to a real company or person is unintended. What it was asked: Review a small contact-import change against its brief and identify defects before the team decides whether to release it. I reviewed an invented 29-line diff with the connected single-model review engine and checked its output against the import brief. Route: single-model review (Claude only); no cross-model debate ran. This was read-only: no repository, running application, client data, or integration tests were accessed, and no change, approval, or merge was made. Run date: 30 September 2026. ### What it found - A later duplicate replaces the first contact row, contrary to the import brief. - Surrounding spaces are not removed, so one address can become multiple contacts. - Whitespace-only addresses pass the blank-row check and enter the accepted list. ## Guardrails - It reads code only. It never writes, changes or fixes code; findings go back to the Developer. - It never approves or merges a pull request. That happens later, once the required checks pass, through the DevOps Agent. - It reviews with no context from the writing session, so writer and reviewer stay separate. - When the code is sound, it says so with a clean pass instead of padding the report. ## Frequently asked questions ### What does automated code review catch that the writer misses? The things a writer is too close to see: leaked secrets, gaps in logins and permissions, SQL injection risks, unhandled errors, performance traps and places where the code drifted from the plan. The Code Review Agent in Ai1 by MyZone AI grades each finding by severity and pins it to the exact file and line. Unlike a typical style checker that flags rule breaks line by line, it reads the change as a whole, looks for security and logic problems, compares the code with your plan and brief, and ranks what to fix first. ### Is a security code review the same as a full security audit? No. The Code Review Agent checks each change for common security risks, such as leaked secrets, login and permission gaps and SQL injection. A dedicated security audit, and watching over your Ai1 server, belong to the Security Agent. It also does not test code in a browser. Browser and end-to-end testing belong to the Tester; the Code Review Agent reads the code, it does not run it. ### What should a good code review tool give you? A severity grade for every finding, the exact file and line, a concrete suggested fix and a clear order of work. The Code Review Agent sorts findings into P0, P1 and P2 and checks the code against your plan and brief. When the code has no real problems, it tells you plainly: review complete, no findings above MEDIUM. You are not left guessing whether it looked. ### Does the Code Review Agent fix, approve or merge code, and when does it run? No. It says what is wrong and where, then passes the findings to the Developer to fix; keeping the writer and the reviewer separate is the whole point. It never approves or merges: the DevOps Agent handles that once the required checks pass, using its findings. It runs both ways. On larger builds it runs at each milestone, and for smaller builds or one-off checks you can ask for a review whenever you like. ## More on this topic - [Multi-Agent Development: Why the Future of Software Is Built by AI Teams](https://myzone.ai/pages/blog/multi-agent-development): Discover how multi-agent AI systems are transforming software development. Teams of specialised AI agents build products 10x faster at lower cost. - [Locking Down AI Agents: The 10-Point Security Checklist Every CTO Needs](https://myzone.ai/pages/blog/ai-agent-security): AI agents are powerful,and vulnerable. Learn the 10 critical security steps to lock down your AI agents before they become your biggest liability. ## About Ai1 Ai1 is the AI operations platform by MyZone AI, where each client runs on its own private server. The Code Review Agent is included on every Ai1 level, including Developer Core, with no per-agent charge. It works alongside the other Ai1 agents on your account. Pricing: https://myzone.ai/pages/services/ai1-pricing. Security: https://myzone.ai/pages/security.