Game Development 2D Release

Produce a reproducible candidate artifact and verify the artifact users would receive.

Establish the release contract

1. Inspect engine and exact version, package manager, lockfile, export presets, target platforms, version source, hosting/store constraints, and secrets.
2. Define artifact names, supported platforms, public configuration, acceptance, rollback, and save/cache compatibility.
3. Read release-pipeline.md.
4. For Phaser, read phaser.md; for Godot, read godot.md.

Build and verify