Critic
Ask the agent that made a change why it made it, from the review page
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If agents now write most of your diff, this gives reviewers diagrams, decisions and AST-aware diffs to judge the design instead of scrolling raw lines.
Whiteboard is a desktop app from a YC W26 team that sits beside Claude Code or Codex. It draws sequence diagrams and ERDs you can click through to the code, shows a Rust-built semantic diff that condenses long functions into pseudocode, and keeps a log of the decisions an agent made. It is for review, not editing: you still write code in your editor. Builds exist for macOS and Fedora, with Windows promised. It runs locally, code stays out of telemetry, and it is MIT licensed.
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