A desktop app for macOS and Windows

Your AI editing crew, on your own computer.

Pick your footage and say in a sentence what you're making. Phosphor's agent turns it into a short you can watch, note and approve.

macOS 13 or later (Apple silicon or Intel), or 64-bit Windows. You also need Python 3.11+, FFmpeg, and the Codex or Claude Code CLI. The app checks for these and tells you what's missing.

How it works

Five phases, from one sentence to a finished short.

  1. 1Brief
  2. 2Shape
  3. 3Build
  4. 4Check
  5. 5Review
A 40-second vertical short from today's recording.
?Who's it for?
Phase 1 of 5

Brief

Say what you’re making in a sentence. It asks only the questions that matter.

openmiddleclose
Phase 2 of 5

Shape

It works out the plan from your footage and shows its progress and decisions.

v1 · playable
Phase 3 of 5

Build

It cuts the video and publishes a playable version early.

picture
sound
export
Phase 4 of 5

Check

Every export is checked before you’re asked to approve it.

00:04Tighter here
00:12Love this bit
Phase 5 of 5

Review

Watch the cut, leave timestamped notes, send a round. It revises until it’s right.

The built-in reviewer

Watch it work

A playable cut shows up early. Watch it, leave notes at the exact moment, and send them as one round. The agent revises, and you approve when it's right.

Phosphordesk-setup-shortReady
your video00:00 / 00:32
Directorv2 is ready and checked. Approve when you’re happy.
Keep the cold open at the start?
Keep itCut it
Your notes · round 1
00:04Trim the pause before the title.
00:11Hold on the screen a beat longer.
00:19Music a little lower here.
Approve & exportv2 · checked
00:0000:0800:1600:2400:32
V2
V1
A1
Computer controlOff until you switch it on.
you’re driving
⌘⌥⇧S
Control is back with you.
Your hands on the wheel

You stay in control

  • Computer control is off until you switch it on.
  • One shortcut, Stop & take over, hands control straight back to you.
  • It asks only the questions that matter, and shows its progress and decisions as it goes.
  • Nothing is exported until you approve it.
Works with your editor
DaVinci ResolveAfter EffectsPremiere
Lives in your menu barOr the system tray. It keeps working when the window is closed, tells you when it needs you, and never jumps in front of your work.
Reusable across videos

Your look, every time

Keep what makes your videos yours and bring it to the next one.

from reference videosStylesLearned from videos you point it at, then reused on every project.
your assetsAsset kitsThe pieces your videos keep coming back to, ready to go.
drop-inEffectsReusable effects you can bring into the next video.
Local-first

Local and private

Your footage and projects stay on your computer.
It uses the Codex or Claude Code account you already have, with your own sign-in.
Nothing asks for your passwords.
Download

Get started

Install it, open it, and it checks your setup for you.

Updates itself once installed
What you need
  • macOS 13 or later (Apple silicon or Intel), or 64-bit Windows
  • Python 3.11 or newer
  • FFmpeg
  • The Codex or Claude Code CLI, signed in with your account
Phosphor checks for these and tells you what's missing.