Collie
New a coding agent that lives on your computer

A coding agent that lives on your computer — and can actually run it.

Local and private. Collie reaches your real environment — your logged-in browser, your desktop, your screen, your files — and proves its work by running it.

↓ Get Collie — it's free See what it can do One click on Windows · also on macOS & Linux · runs on your own machine
Collie ~/staging
You
Fix the timeout bug in checkout — and prove it's fixed
Collie
Found it → checkout/pay.py:42
Wrote a failing reproduction · red before the fix
Made the fix · +1 −1
Re-ran it — verified passing ✓
Fixed and verified. Anything else?
Ask Collie to…
CODING IS THE CORE · YOUR MACHINE IS THE REACH

If you can describe it, Collie can do it.

Its coding agent built the desktop console, the real-browser control, the recorder, the phone remote — the range is the proof. You ask; it does the whole thing, on your own machine.

Fix the checkout bug — and prove it's fixedcode Renew the staging cert and open the dashboardbrowser Pull my orders from the portal into a spreadsheetweb Get this old project running on my machinesetup Clean up and organize my Downloads folderfiles Fix the checkout bug — and prove it's fixedcode Renew the staging cert and open the dashboardbrowser Pull my orders from the portal into a spreadsheetweb Get this old project running on my machinesetup Clean up and organize my Downloads folderfiles
Rename this project everywhere in the codecode Summarize these 40 PDFs into one notefiles Fill out this application form with my detailsweb Find every place this function is usedcode Download my invoices and total them upweb Rename this project everywhere in the codecode Summarize these 40 PDFs into one notefiles Fill out this application form with my detailsweb Find every place this function is usedcode Download my invoices and total them upweb
1

Say it in plain words

No commands, no setup. Talk to Collie the way you'd ask a person for help.

2

It does the whole thing

It opens your browser, runs the steps, edits the files — the actual work, not just advice.

3

It proves it worked

It runs the change to check it's actually done, shows you exactly what it did, and hands back the result.

Uses your real browser

Signed into your accounts — it does what you'd do, in your own session.

Proves its work

Writes a check, runs it, and only calls a task done when it actually passes.

Runs on your machine

Local and private, on your own AI subscription. Your files stay with you.

Windows, Mac & Linux

One click to install on Windows; a single line on macOS and Linux.

GET COLLIE

Free, and installed in a minute.

Pick your system — we already guessed it below.

Collie
v0.20.0 · free · MIT · open-source

The easy way: no Python, no terminal. Download, double-click, pick your language — done. Everything's bundled inside.

↓ Download for Windows Collie-Setup.exe · 48 MB
No setup or configuring
Desktop app + live wallpaper
Installs for you only, no admin
Uninstalls cleanly anytime
Windows 10 / 11all downloads →

On Apple-silicon & Intel. Grab it with one line (a one-click .dmg app is on the way).

$pip install -e ".[local]"copy
needs Python 3.12+step-by-step guide →

One package, one line. Everything works on plain localhost.

$pip install -e ".[local]"copy
needs Python 3.12+step-by-step guide →