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. You can question each hunk before you push, open a PR, or ask a teammate to look, and all of it happens on your own machine.

Try DiffCue free See the app

50 free lifetime AI actions, 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 and cached per hunk for the whole session.

Everything else waits until you've already pushed.

DiffCue is for the time before that, while nobody else has seen the change yet, whether you wrote it or an agent did.

  • AI coding agents (Cursor, GitHub Copilot, Claude Code, Windsurf): they produce a diff quickly, but they aren't built to explain why each hunk changed or to point out what's subtly wrong, bloated, or not what you asked for. DiffCue reviews what the agent did, one hunk at a time, before it becomes your commit.
  • 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: you only get these after you've pushed and opened a PR, and GitHub's AI summaries need a Copilot subscription and only work on repositories hosted on GitHub. DiffCue reviews changes while they're still private on your disk, before you've committed to anything.
  • 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 it never explains the same thing twice.
  • GUI git clients (Tower, GitKraken, Fork, SourceTree): excellent for staging, branching, and committing, but none of them explain a diff or let you question it. 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 nothing leaves your machine.

  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, and ask for an explanation of what changed and why it matters whenever you want one.

  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 cached for the session, so going back to it costs nothing.

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

Every install comes with 50 free lifetime AI actions, and you don't need to sign up or enter a credit card. If you want to keep going after that, unlimited use is a one-time $34.

$34 once, after 50 free actions

  • 50 free lifetime AI actions 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

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