Agent GridAgent Grid
Isometric overview of the agent-grid repo rendered as an archipelago of worktree islands on dark water, with the Production Island at the center.
Build with Cursor · a16z SF

Your worktrees have traffic now.

City Grid turns any git repo into a living isometric city. Files are buildings. Worktrees are islands with traffic. Every diff breaks ground.

Your repo is a city.
Watch the tour ↓Download for macOSv0.1.0 · 97 MB
↑ this page is one of the construction sites in this shotWorks on any git repo — drop a folder at launch or set CITYGRID_REPO
454Files58Worktrees

Legend

How to read your city

City Grid's vocabulary mirrors git's. Once you learn the metaphor you can read a repo's health at a glance.

  • File → Building

    Floors follow lines of code on a log curve, capped at 45 floors.

  • Worktree → Island

    One island per `git worktree`. The Production Island sits at the center.

  • Added lines

    ghost floors. Green translucent ghost floors stack on top of buildings as the diff grows.

  • Deleted lines

    wireframe floors. Red wireframe floors mark the lines a diff removed.

  • Big diff → Crane

    Past ~80 changed lines a file gets scaffolding and a slowly rotating tower crane.

  • Active agent → Crew

    Construction crews and trucks swarm the file an agent is currently editing.

  • Prod users → Traffic

    Pedestrians and cars scaled to the repo's simulated population.

  • Commits → Live Feed

    Recent commit subjects scroll in the LIVE FEED panel like a city ticker.

Tour

Eighteen seconds in the city.

Cameras drift over the archipelago — past traffic, cranes, and a `feat/city-grid-landing` construction site. Click to play.

Rush hour in node_modules. Every diff breaks ground.

Gallery

Postcards from the city.

Isometric overview: satellite worktree islands around the Production Island — one per `git worktree`.
↑ this page is one of the construction sites in this shotDay overview. One island per worktree.
Construction close-up: tower cranes over a building under construction, translucent green ghost floors stacking up the added lines.
Construction close-up. Tower cranes, green ghost floors.
Night mode: lit windows scale with lines of code; headlights are simulated production traffic.
Night mode. Lit windows scale with LOC.
One worktree, one island: districts are directories, buildings are files.
One worktree, one island. Districts are directories.

Story

Built in an evening, by a crew.

City Grid landed across five build phases — one commit each — at Build with Cursor, a one-evening hackday at the a16z San Francisco office in June 2026. A crew of Claude Code workers wrote the commits, orchestrated on an Agent Grid canvas.

Live Feed · five build phases, one commit each
  1. scaffold56e4834electron-vite + three skeleton — git scanner v0, typed IPC bridge, module contracts, placeholder city, smoke/screenshot modes
  2. backend42c6ed1incremental 3s status-hash scanning, -z parsing, cache eviction, fixture + smoke assertions
  3. hud1cd6e2bdark-chrome overlay — overview card, worktree chips, live feed, toolbar toggles, minimap, details panel, tooltips, keyboard nav
  4. simf448e32instanced traffic + pedestrians + construction crews — lane-following cars, cargo trucks, activity bursts, night headlights
  5. enginee1fc2ebfull CityEngine — treemap districts, instanced buildings with shader windows, construction visuals, terrain, camera flights, picking, plaques, minimap
Meet the crew that built it → agentgrid.shSource on GitHub ↗City Grid is an Agent Grid experiment. The same canvas that shipped this page.

Download · v0.1.0

Take your repo for a drive.

Drop a folder at launch, or point City Grid at a specific repo with CITYGRID_REPO=/path/to/repo.

macOS

v0.1.0

Apple Silicon · arm64

Download dmg · 97 MBOr .zip · 96 MB

Signed but not notarized. If macOS blocks first launch: System Settings → Privacy & Security → scroll to City Grid → Open Anyway.

Windows

v0.1.0

Windows 10 / 11 · x64

Download zip · 112 MB

Portable build — extract the zip and run City Grid.exe. No installer yet.

Power-userCITYGRID_REPO=/path/to/repoSkips the file picker and opens the repo on launch.