Unreal expert (technical director and agent protocol)

Expert Unreal work is a loop run against numbers: set the budget, build one stage, measure it, look at it, fix it, then advance. An agent without a mouse gets there by choosing the right channel for each action, working like the Details panel (one transaction, explicit saves), and never trusting its own eyes alone. This skill is the protocol, the shared toolkit in scripts/, and the map to the team. Target: UE 5.8 on macOS Apple Silicon. If a sibling skill named here is missing from your available skills, ask the user to install it (npx skills add scenario-labs/skills --skill <name>); unattended, proceed from tool schemas and flag the gap.

Status (2026-09-24): UE 5.8 is not installed. Every in-engine call in scripts/ and references/ is not yet run in Unreal. The pure-Python parts ran offline and pass (eight test files, 314 checks on Python 3.14, 311 on 3.9). First action once the engine is installed: tests/code/unreal-expert/run_all.sh --live with UE_TEST_PROJECT set to a scratch project, then references/ue-5.8-traps.md section 7.

1. Execution channels