AI Coding Agents
Code Review
Code ownership for coding agent pull requests
September 25, 2026 - 2 minute read
Code ownership gives coding agent pull requests a predictable human review path. Agents can produce changes across unfamiliar parts of a repository, so the reviewer selected by proximity or availability may miss a local invariant. Ownership rules connect changed paths to people who understand their operational and security consequences.
GitHub’s CODEOWNERS documentation explains how matching files automatically request owners and how branch protection can require their approval. The file is useful only when its patterns reflect the repository that exists today.
Design code ownership around risk
Start with boundaries that carry distinct failure modes. Authentication code, payment flows, deployment manifests, database schemas, public APIs, and generated clients usually need different reviewers. Broad ownership at the repository root can provide a fallback, while narrower patterns route sensitive changes to specialists.
Test pattern precedence before relying on it. GitHub uses the last matching CODEOWNERS pattern, and some familiar .gitignore syntax does not apply. Verify a sample file from each protected area in a temporary pull request or with a repository-aware checker. Confirm that teams are visible and have the required access.
Keep ownership separate from task instructions. An AGENTS.md file can tell a coding agent which commands and local rules apply, while CODEOWNERS identifies who reviews the resulting change. Factory’s AGENTS.md guidance recommends scoped instructions and verified completion checks. Together, the two files describe execution and accountability without giving the agent approval authority.
Apply code ownership to coding agent pull requests
Require owned approval through branch protection for the paths where it matters. An automatic review request without a merge rule is only a notification. Protect the CODEOWNERS file itself so a change to ownership cannot quietly remove the reviewer required for another sensitive edit.
The coding task should preserve the review boundary. Ask the agent to list matched owners, call out files with no specific owner, and avoid mixing unrelated subsystems. If a pull request touches several ownership domains, split it when the changes can be reviewed and deployed independently.
Factory’s automated code review adds a separate correctness pass in CI. It complements code ownership rather than replacing it. Automated review can flag likely defects, while owners decide whether a change fits the system’s constraints and operating model.
Keep code ownership accurate
Review ownership rules when teams change, services move, or generated files relocate. Stale aliases and unmatched directories create a false sense of control. Track how often pull requests receive no owner, request a team with no available reviewer, or need manual reassignment.
Use the smallest useful ownership groups. A team that owns every file receives too much noise, while a single named person creates a bottleneck. Team ownership with documented escalation usually survives organizational change better.
For each coding agent pull request, reviewers should be able to see why they were selected, which paths they own, and which checks ran. That evidence turns ownership from a static file into an enforceable part of delivery.
