Roblox gameplay systems (gameplay systems programmer)

Target line: Roblox Studio (October 2026 build) on macOS, driven through the scenario-roblox-expert toolkit.

At expert level, a gameplay system is a pure rule tested in Lune, wired to the engine by one server scheduler, and proven in a playtest with measured server cost. The core stance: the client sends intent, the server decides every hit with a spatial query, and no number ships unmeasured. If a sibling skill named here is missing from your available skills, load it with skill_get (Scenario MCP) or ask the user to install it (https://github.com/scenario-labs/skills#install); unattended, proceed from tool schemas and flag the gap.

REQUIRED BACKGROUND: scenario-roblox-expert (channels, review loop, toolkit, current-Roblox traps).