DiffCue

Know what a vibe-coded change does before you commit it.

DiffCue explains your uncommitted git changes, whether you wrote them or an AI agent did. Instead of a one-shot summary from your agent, you step through the code yourself, hunk by hunk, each with its own explanation and chat. You understand what you're committing, and you keep up with your own codebase even when an agent writes most of it. Your code goes only to the AI provider you choose, never to DiffCue.

Try DiffCue free See the app

5 free reviews, no signup or card · then $34 once, no subscription

An agent wrote a lot of that. You still own it.

Cursor, Copilot, Claude Code, and Windsurf write code quickly. The slow part now is working out exactly what changed, so you can trust it enough to commit.

  • Subtly wrong: it looks fine at a glance but fails on an edge case you'd have caught if you'd read it yourself.
  • Bloated: three files and a new abstraction for something one line would have done.
  • Off-spec: it runs, but it isn't what you asked for.

DiffCue reads every hunk an agent touched and explains each one in place, so the change that matters doesn't slip past in a quick skim.

Pick a hunk on the left, read what changed and why on the right, and ask a follow-up without losing the thread.

One repository, every uncommitted file, explained hunk by hunk. Your chats are saved with their explanations, so they're still there after you quit.

Other tools flag problems. DiffCue explains the change.

DiffCue is for understanding a change before you commit it, while nobody else has seen it yet, whether you wrote it or an agent did.

  • AI coding agents (Cursor, GitHub Copilot, Claude Code, Windsurf): most can review or explain their own uncommitted changes, usually in one pass: a summary or a list of findings. You never have to look at the code, so it's easy to only half understand what changed. In DiffCue you go through the code yourself, file by file and hunk by hunk, with the before and after side by side. Each hunk gets its own explanation, written with the whole change in mind, and its own chat for follow-up questions.
  • git diff, or your editor's diff view: shows what changed but says nothing about why it matters, and there's no one to ask. DiffCue explains each hunk in place and answers follow-up questions without you leaving the file.
  • GitHub or GitLab's pull-request review tools: they're still where your team signs off on a pull request. DiffCue is for the step before that: understanding the change yourself while it's still uncommitted on your disk.
  • Pasting diffs into ChatGPT, Claude, or Copilot Chat: you copy and paste by hand, lose the file and hunk structure, and explain the context again every time. DiffCue already knows which hunk you're looking at and keeps a running conversation for each one, so you never have to explain the same thing twice.
  • GUI git clients (Tower, GitKraken, Fork, SourceTree): excellent for staging, branching, and committing. GitKraken's paid AI can explain your working changes, but none of them let you question a single uncommitted hunk. DiffCue is built specifically to explain a diff and let you interrogate it. It isn't a general git client with a chat window attached.
  • Another AI subscription: most comparable tools cost $5–15 a month, roughly $70 a year. DiffCue is $34 once, and you can try it free first. You bring your own API key and pay your AI provider directly at their own prices, which are often a fraction of a cent per action.

Four steps, start to finish.

The only setup is pointing it at a folder and adding your API key once.

  1. Pick a folder

    Choose any local folder that has a .git directory. DiffCue reads it straight off disk and sends diffs only to the AI provider you choose, never to DiffCue.

  2. Review the file list

    Every uncommitted change (working tree, staged, and untracked) appears in one list, each with a one-line AI summary and its add/delete counts.

  3. Open a hunk

    See the before and after side by side, with an explanation of what changed and why it matters.

  4. Ask a follow-up

    Ask about the risk, the test coverage, or the reasoning in a chat thread attached to that hunk. The thread is saved along with the hunk's explanation, so it's still there after you quit and reopen DiffCue, and going back to it costs nothing.

Free to start, then $34 once, with no subscription.

Every install comes with 5 free reviews, and you don't need to sign up or enter a credit card. A review is one repo for one day, with every AI summary, explanation, and chat message included. If you want to keep going after that, unlimited use is a one-time $34.

$34 once, after 5 free reviews

  • 5 free reviews before you pay anything, with no signup or credit card.
  • Use your own API key for OpenAI, OpenRouter, or any OpenAI-compatible endpoint, and pay that provider directly at their rate.
  • Your key is stored in the macOS Keychain and is never sent to DiffCue's servers.
  • macOS only for now.
Download free Buy DiffCue, $34 once

plus tax · 2 Macs · 30-day refund · free 1.x updates

Your license key arrives by email automatically after purchase. You can also redeem it manually in the app.