---
description: Pure Luau modules in src/shared/pure must run outside Studio
globs: "src/shared/pure/**/*.luau,tests/**/*.luau"
alwaysApply: false
---

Files in `src/shared/pure/` are pure: the luau CLI must be able to run them with no Roblox engine.

| Never in `pure/` | Instead |
|---|---|
| `game:GetService(...)`, `workspace`, `script.Parent` | pass the values in from the edge script |
| `require(script.Parent.Money)` | `require("./Money")` |
| `Instance.new`, `Vector3`, `CFrame`, `Enum`, `Random` | plain numbers and tables |
| `task.wait`, `wait`, `spawn`, `delay`, `tick()` | return a value; the edge script schedules |
| `math.random()`, `os.time()` | take `rng` / `now` as parameters |
| `print`, `warn` | return `false, "reason"` |

- `--!strict` on the first line, with exported types.
- Every change gets a case in `tests/*.spec.luau`. Then run the `luau-pure-tests` skill's checks.