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/setup-engine — Section 3: Look Up Current Version

Part of /setup-engine. SKILL.md names when to read this file; the settings it resolved and the rules under its later headings still apply here.

3. Look Up Current Version

Once the engine is chosen:

  • If version was provided, use it
  • If no version provided, use WebSearch to find the latest stable release:
    • Search: "[engine] latest stable version [current year]"
    • Confirm with the user: "The latest stable [engine] is [version]. Use this?"

Check the chosen version against what is actually installed

A version found by web search is what exists, not what the developer has. Pinning one they cannot run means every later instruction — build, test, smoke, the engine reference docs — targets an engine that is not on the machine.

Probe for the binary (Bash), and treat failure as unknown, never as absent:

Engine Probe
Godot godot --version, else look for godot/Godot_v* on PATH or in the platform's usual install location (macOS: the binary inside the bundle, Godot.app/Contents/MacOS/Godot)
Unity The Hub's editor directory, then that editor's -version — C:/Program Files/Unity/Hub/Editor/<version>/Editor/Unity.exe on Windows, /Applications/Unity/Hub/Editor/<version>/Unity.app/Contents/MacOS/Unity on macOS, /home/<user>/Unity/Hub/Editor/<version>/Editor/Unity on Linux. Not bare Unity: on PATH it may be Unity's separate CLI, which rejects -version
Unreal The launcher's install directory (UE_<version> folders under C:/Program Files/Epic Games/ on Windows); elsewhere, ask where the engine was built or installed. The editor is not on PATH by default

Keep the executable the probe found (for Godot, whether bare godot --version ran — that is, godot is on PATH): Section 5.5.1 writes it into commands.* and engine.path.

Then:

  • Match — say so in one line and continue.
  • Mismatch — state both versions and ask, offering three options: pin the installed version, pin the newer one and upgrade later, or pin the newer one deliberately. Record the answer; do not pick silently.
  • Not found / probe failed — report installed version NOT DETERMINED and continue with the chosen version. Do not report this as "no engine installed": a probe that could not run has not established absence.

Whatever the outcome, write it into Section 7's VERSION.md as an Installed at pin time row, so a later reader can tell a deliberate version-ahead pin from an accident.