BundleGuard — AssetBundle Update Guard & Version Diff

If you ship content updates with raw AssetBundles without re-releasing the whole app, your bundles can quietly drift between versions. An asset gets removed or renamed, a type changes, a script comes off a prefab — and the update breaks for everyone still on the previous version. It fails late, in production, and it's painful to trace.

BundleGuard turns each build into a versioned snapshot of your AssetBundles, then compares any two versions and warns you — before you ship — about anything that would break live clients. It also tells you how much of your next update is genuinely new content versus bundles that were rebuilt for no reason, and can drill down to the exact asset (and even the component inside a prefab) that changed.

How it works: open BundleGuard → Compare Builds, point it at your old and new build folders (or saved snapshots), and click Compare — BundleGuard reads the finished bundles, with or without their .manifest files (it never builds or changes anything). Save a snapshot for each release; before the next update, compare them. You get a clear, color-coded report of breaking changes, the full catalog diff, and an update-impact summary — how many MB players will re-download, and how much of that is wasted churn.

Works with any project, any genre. BundleGuard is a developer tool, not content — there are no assets to customize and it isn't tied to a genre. It works with any Unity project that ships raw AssetBundles (not Addressables), and is especially valuable for live-ops and mobile titles that push frequent content updates. Analysis is strictly editor-only and read-only: BundleGuard never modifies your project or your assets.