High Agency: The Podcast for AI Builders How Graphite's $50M Series B is Transforming AI Code Review
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May 20, 2025 
Merrill Lutsky, co-founder and CEO of Graphite, dives into the groundbreaking transformation of code review processes using AI. He explains the evolution from traditional methods to their innovative AI code reviewer, Diamond. Merrill highlights the effectiveness of over-generating and pruning comments for improved feedback. He also discusses how AI is redefining the development landscape, where developers set requirements and AI takes on coding, potentially changing engineering roles forever. This discussion reveals the exciting future of AI in software development.
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Graphite's Stack Diff Origin
- Graphite began by recreating Meta's stack diffs workflow for more efficient code review.
- This approach helped teams avoid large, slow-to-review pull requests by breaking changes into smaller PRs.
Diamond as Instant AI Reviewer
- Diamond acts like a human reviewer but provides instant, high-quality feedback on every PR.
- It scans for bugs, security issues, style inconsistencies, and performance improvements with custom rules.
Tune Prompts for High Signal
- Focus on tuning prompting and building strong eval sets to deliver high-signal, useful AI code review comments.
- Avoid noisy, spammy comments to maintain trust and prevent users from tuning out feedback.