The Merge: Why Building AI Chat Is Harder Than It Looks
A conversation with Assistant UI founder Simon Farshid about the hidden work behind AI chat interfaces, product judgment, and his coding-agent loop with CodeRabbit.
CodeRabbit Blog3 min read
CodeRabbit
35 stories
The world runs on open source. We’re putting more than $10 million behind it
CodeRabbit is committing more than $10 million of its actual direct cost to open source over the next year through cash sponsorships, free Review and Security, and broader agentic support across the software development lifecycle.
CodeRabbit Blog6 min readIntroducing the CodeRabbit plugin for Cursor
Install the CodeRabbit plugin for Cursor and run focused code reviews from the same Agent session where you build.
CodeRabbit Blog3 min readThe pull request outlived its obituaries and got a bigger job
More changes are flowing through pull requests than ever thanks to AI-generated code, but a human still needs to decide what ships.
CodeRabbit Blog7 min readIntroducing CodeRabbit Security
CodeRabbit Security traces suspected vulnerabilities across the codebase, evaluates reachability and the conditions required for exploitation against code evidence, and proposes reviewable fixes in the pull request workflow.
CodeRabbit Blog7 min readCode is abundant. Judgment is scarce. We raised $143 million to help it scale.
CodeRabbit raised a $143 million Series C at a $1.5 billion valuation and is introducing Agentic Change Management, the control layer for software changes created by humans and agents.
CodeRabbit Blog8 min readTeaching NVIDIA Nemotron 3.5 Lightning to route code reviews
CodeRabbit worked with NVIDIA and Baseten to post-train NVIDIA Nemotron 3.5 Lightning for one of CodeRabbit's highest-volume routing tasks, improving route agreement while reducing estimated inference cost.
CodeRabbit Blog5 min readThe three hidden attention taxes derailing the agentic SDLC
Reviewing every agent-generated change is becoming impossible. The next bottleneck is deciding what deserves attention, rebuilding context, and keeping code safe after merge.
CodeRabbit Blog5 min readBetter models don't solve a judgment bottleneck
Code is now plentiful, but judgment about what deserves to merge is not. Better models sharpen what agents write, but they don't make that call.
CodeRabbit Blog5 min readClaude Opus 5 review: Coverage, comment quality, and cost
Explore CodeRabbit’s Claude Opus 5 benchmarks for code review: actionable comments, coverage, nitpicks, token use, and where the model fits.
CodeRabbit Blog7 min readCode is no longer the bottleneck. Understanding is.
Coding agents can expand change volume faster than teams can understand it. Review needs a shared path from intent to system behavior to code so people can keep shaping the system.
CodeRabbit Blog5 min readClose the loop after every merge: the agent that reviewed your PR can now follow through
Post-Merge Actions use pull request context to handle changelogs, documentation, tickets, and other work that should happen after merge.
CodeRabbit Blog4 min readGPT-5.6 Sol and Terra: Coding, code review, and cost
Compare GPT-5.6 Sol and Terra for coding agents and code review. Explore CodeRabbit’s benchmark results, follow-through, review quality, and cost trade-offs.
CodeRabbit Blog12 min readThe case for monorepos, and what they cost you
Monorepos keep shared code in sync but make every bad PR everyone's problem. Here's when to commit to one, when polyrepo wins, and how to review at scale.
CodeRabbit Blog6 min readClaude Sonnet 5 review: Coding, code review, and cost
Compare Claude Sonnet 5 with Sonnet 4.6 and flagship models using hands-on coding work, CodeRabbit review results, and practical cost trade-offs.
CodeRabbit Blog10 min readLoop engineering: designing loops you can actually walk away from
Loop engineering allows you to step away completely by designing a system that operates autonomously, removing the human from the loop entirely.
CodeRabbit Blog5 min readHow a hackathon project turned into my work at CodeRabbit
How Ayush Sridhar CalHacks Hackathon project turned into an SWE internship with CodeRabbit
CodeRabbit Blog6 min read
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