Download Momentum

A local AI agent workspace. Early access build for macOS and Windows.

Momentum is a desktop app. Open this page on your Mac or PC to install it.

Main/City Builder

Build me a city builder in three.js: grid streets, procedural blocks, a day-night cycle. Treat it as a durable goal and keep going between turns.

Goal recorded: "Ship a playable three.js city builder" with four criteria. Scaffolding now: street graph first, then zoned massing, then the lighting pass.

Ran commands· 2

pnpm create vite . --template vanilla-ts

Finished

No public tool output.

4.2 s

pnpm dev: smoke test

Finished

Output

VITE ready in 412 ms · http://localhost:5173

3.1 s

Used 2 tools

Write src/city/grid.ts: street graph + parcels

Finished

No public tool output.

18.9 s

Write src/city/blocks.ts: zoned massing

Finished

No public tool output.

24.1 s

src/city/grid.ts: street graph, parcels, road widths
src/city/blocks.ts: procedural massing per zone
src/main.ts: renderer, controls, orbit camera

continue

Continuing the goal from Momentum Memory: "Ship a playable three.js city builder". Sol landed the street graph and zoned blocks; the day-night cycle and placement tool were still open.

Ran commands· 1

pnpm build: typecheck clean

Finished

Output

built in 1.42s

2.6 s

Used 4 tools

Recall goal: Momentum Memory

Finished

Output

goal-city · 2/4 criteria satisfied

0.4 s

Read src/city/grid.ts + blocks.ts

Finished

No public tool output.

0.9 s

Write src/city/daynight.ts

Finished

No public tool output.

21.4 s

Update src/city/props.ts: streetlights + trees

Finished

No public tool output.

9.8 s

Picking up at the lighting pass: sun orbit and window emissive are in. Next: the placement tool and budget loop.

34m 3s

Momentum in development. Illustrative session, rendered from the app’s interface.^1,2

What’s in this build

Momentum's own memory now takes priority across Codex, Claude and Grok, with per-agent memory controls and a clear No Save option.
Adds beta registration and offline access checks. If access is paused, you can still read, export, see your history and update.
Keeps the agent setup you picked through registration, tells an access hold apart from an outage, and fixes Claude detection, MCP setup and Windows PATH problems.

Before you open it

This early access build isn’t code-signed yet, so your computer will warn you the first time you open it.

macOS: open the .dmg and drag Momentum to Applications. If macOS blocks it, go to System Settings → Privacy & Security and click Open Anyway.

Windows: if SmartScreen shows “Windows protected your PC”, click More info, then Run anyway.

All downloads

macOS · Apple silicon

.dmg

439 MB

Download

macOS · Intel

.dmg

458 MB

Download

Windows · x64 installer

Setup .exe

363 MB

Download

Linux · x64

.AppImage

Coming soon

SHA-256 checksums

Compare with shasum -a 256 <file> on macOS or Get-FileHash <file> on Windows.

802cee67ddce87e904b53ae22563dfe5041d6558533c13bd4e93c38757a9c8f8 Momentum-0.3.8.5-macos-arm64.dmg

31114098e1cbad4345330f47babd424f1b0ff78e56c8ff6a5c7966a92f7e918b Momentum-0.3.8.5-macos-x64.dmg

4f6eb4faf6519ff50bef5621320e2f3349ea74acbfa37139bd86593958233bee Momentum-0.3.8.5-windows-x64-Setup.exe

Download Momentum

What’s in this build

Before you open it

All downloads

Try it.
Tell us what breaks.

Notes

Download Momentum

What’s in this build

Before you open it

All downloads

Try it.Tell us what breaks.

Notes

Try it.
Tell us what breaks.