You are integrating Claude Code into your Continuous Integration/Continuous Deployment (CI/CD) pipeline. The system runs automated code reviews, generates test cases, and provides feedback on pull requests. You need to design prompts that provide actionable feedback and minimize false positives.

Your CI pipeline performs security-focused code reviews on approximately 50 PRs daily, currently costing $150/day using the synchronous API. Reviews are non-blocking – developers merge after tests pass and address findings in follow-up commits. You're evaluating the Message Batches API for its 50% cost reduction.

What factor most determines whether batch processing is appropriate for this use case?