Review code from Claude Code, Codex or Cursor in a native Mac app. Open the diff, follow callers, and ask AI Reader about a change. Click its source references to read the surrounding code.
v0.1.303 · Apple silicon & Intel · macOS 14+Early Access Preview · Expires (UTC)
export function cupsFor(waterMl: number) {
return Math.floor(waterMl / 200);
}
// Fictional teaching input: 550 ml.
const cups = cupsFor(550);
// cups is 2.For this fictional recipe, each cup uses 200 ml. With 550 ml, dividing gives 2.75 and Math.floor returns 2.
recipe.ts:1–3import { cupsFor } from './recipe';
export function teaLabel(waterMl: number) {
return cupsFor(waterMl) + ' cups';
}
// teaLabel(550) returns '2 cups'.teaLabel passes waterMl to cupsFor, then puts the returned integer into a label. Read recipe.ts to check how that number is calculated.
label.ts:1–5export function cupsFor(waterMl: number) {
return Math.round(waterMl / 200);
}
// Proposed change in this teaching example.
// cupsFor(550) now returns 3.Math.round(2.75) returns 3, but three cups need 600 ml in this fictional recipe. The input 550 distinguishes the proposed change from the original.
recipe.ts:1–3Diffs, the editor, search, and the AI Reader share one window. Local Changes shows everything that changed since your last commit, and when an answer mentions a line, you can open it right there.
Open the DMG, drag Yenpo into Applications, and launch it. Choose the root of the repository your agent is working in. Local Changes shows what changed since your last commit, and you can read and search before setting up AI.
Installation and your first projectPick one changed function and jump to its definition, its callers, and the tests that use it. Ask the AI Reader what the change does, then open the lines it cites and check the answer yourself.
Review AI code with the AI Code ReaderLook at one commit, or compare two branches, such as the agent’s branch and main. Read the inline diff and ask the AI Reader to look for regressions. The comparison stays on the commits you picked, and it is read-only.
Git comparison modesSay your agent just reworked the request client. Here’s one way to check it in Yenpo.
Open Local Changes, or compare the agent’s branch with main, and find the files that touch retries.
Ask the AI Reader which calls now retry, how many times, and what happens when the last attempt fails.
Preview the lines the answer cites, then open the callers and tests the agent didn’t touch.
Run the relevant test or command yourself to confirm the explanation. The AI Reader reads code but doesn’t run it.
No. Local Changes, commit and branch diffs, search, Markdown, and language-server navigation all work without one. Connect your own provider when you want to ask the AI Reader. Your provider controls model access and any usage charges.
Set up the optional AI ReaderSwift, Rust, C, C++, Objective-C, Python, JavaScript, TypeScript, and Go, each through its language server. Yenpo can install rust-analyzer for you; the other servers come from Xcode or your PATH. What works depends on the server and on how your project is set up.
Browsing and search stay on your Mac. When you ask the AI Reader something, your question and the relevant code go to the model endpoint you set up, so check that provider’s terms before using restricted code. The AI Reader only reads unless you allow edits for a run.
It runs on Apple silicon and Intel Macs with macOS 14 or later. Each build expires on the date shown next to the download button, and reinstalling it doesn’t reset that date, so update before then.
See what changed, follow it through the code, check the AI’s explanation, then run the tests yourself.Choose a guide for your question
Your vibe-coded feature works, but can you explain it? Learn with a runnable filter: predict three results, change one rule by hand, and check what changed.
Read articleA shallow copy creates new outer objects but keeps their nested labels shared. Follow the caller, compare references, and test an explanation that misses the mutation.
Read articleChoose the right Git comparison, decode a hunk, find untracked files missing from the patch, and run a small test of the proposed behavior.
Read articleDiffs, Local Changes, and search work right away. Connect a model provider whenever you want to ask the AI Reader something.
Download EAPThe app interface supports English, Simplified and Traditional Chinese, Japanese, Spanish, Brazilian Portuguese, Korean, German, French, and Russian.
v0.1.303 EAP · Apple silicon & Intel · macOS 14+Expires (UTC)