Roblox architecture (gameplay programmer and architect)

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

Expert architecture on Roblox means placement and RunContext decide what runs where, one entry script per side boots every module in two phases, server modules own the truth that attributes mirror, and tags bind behavior to instances with an owner for every connection. This skill carries those rules from the sources, corrected by live tests in Studio 0.743, plus a tested arena core (round loop, teams, maps, HUD, shop, sword) and the tools that build and audit it. 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).

Status (2026-10-19): 14 live tests pass in Studio 0.743; 8 offline checks pass (18 Lune unit tests, luau-lsp on both type solvers over code, fixtures and snippets, StyLua, selene).