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Roblox Studio plugin · public beta

AI that builds
inside your Studio

Describe a feature and Formix writes the Luau, then places it exactly where it belongs in your place — server, client, modules, UI. No copy-paste. No tab switching. It reads your Explorer, fixes playtest errors, and versions every edit.

Start buildingSee how it works

$ install via Roblox Creator Store — works in Studio, no account wall

BloxRunner.rbxl — Roblox Studio
SprintSystem
RoundManager
PlayerData
local Players = game:GetService("Players")
local ReplicatedStorage = game:GetService("ReplicatedStorage")
 
local SPRINT_SPEED = 24
local WALK_SPEED = 16
local DRAIN_PER_SECOND = 18
 
local sprintEvent = Instance.new("RemoteEvent")
sprintEvent.Name = "SprintEvent"
sprintEvent.Parent = ReplicatedStorage
 
sprintEvent.OnServerEvent:Connect(function(player, sprinting)
    local character = player.Character
    local humanoid = character and character:FindFirstChildOfClass("Humanoid")
    if humanoid then
        humanoid.WalkSpeed = sprinting and SPRINT_SPEED or WALK_SPEED
    end
end)
Formixinserted · ServerScriptService

Capabilities

It works like a developer, not a chatbot

Direct Studio sync

Generated scripts land exactly where they belong — ServerScriptService, StarterGui, anywhere — with intermediate folders created for you. The clipboard is retired.

ServerScriptService › SprintSystemsynced
sprintEvent.OnServerEvent:Connect(function(plr, on)
    local hum = plr.Character:FindFirstChild("Humanoid")
    if hum then hum.WalkSpeed = on and 24 or 16 end
end)

Project-aware context

It reads your whole Explorer tree before writing a line.

ServerScriptService
  └ Scripts
      SprintSystem      ← new
ReplicatedStorage
  └ Remotes / Modules

Instant rollback

Every generation is a checkpoint. One click reverts any file.

v42v41v40

Playtest & autofix

It watches the Output during a playtest, then patches what broke.

attempt to index nil with 'Humanoid'
guarded Character / Humanoid — replace applied

Three working modes

Ask to review each edit, Auto to apply on arrival, or Plan to read-only.

AskAutoPlan

0+

Scripts generated

0+

Developers building

0+

Games powered

Pricing

Pay for what you generate

Credits are spent per prompt and scale with the model you pick. Start free.

Free

For trying Formix on your first place.

$0forever

  • 3 credits per day
  • Gemini 2.5 Flash only
  • 1 project
  • Basic rollback (10 entries)
Start for free

Pro

recommended

For serious builders shipping real games.

$14.99/ month

  • 150 credits per month
  • Flash 1 · Sonnet 3 · Opus 6 credits per prompt
  • Up to 150 Flash, 50 Sonnet, or 25 Opus prompts
  • 5 projects
  • Full rollback history
  • Playtest & Autofix
  • Priority speed
Get Pro

Credit Packs

Top up when a build runs long — no plan change needed.

$3.99+one-time packs

  • 20 credits$3.99
  • 85 credits$19.99
  • 220 credits$49.99
Buy credits

Credit cost per prompt: Flash 1 · Sonnet 3 · Opus 6. Prices in USD. Cancel anytime — your scripts stay in your place.

Comparison

Against other tools

Same workflow, at full price. Prompt counts at standard credit costs.

 Other toolsFormix
Free daily credits13
Pro price$19.99/mo$14.99/mo
Pro credits40/mo150/mo
Sonnet prompts~20~50
Opus prompts~8~25