This is the list of mods that are used to validate (test) Harmony (redesigned) before releasing it.

All known versions of the CitiesHarmony.API are tested against the Harmony (redesigned) mod, with the mods on this list subscribed and enabled. A city is loaded, unloaded; a map is loaded in the map editor, an asset is loaded in the asset editor. For validation to be successful (ie, the Harmony mod "ready" for release", the Harmony Mod itself must not crash, all API test suite tests must pass, and all mods must load, not throw any exceptions related to Harmony, and a Final Harmony report must be issued. That report becomes the validation report[gist.github.com]. Validation history is also available, so you can see and compare how the Harmony mod was validated previously.

Note: Validation does not mean the mods themselves are error free. Indeed there are many mods on this list that have known bugs. Validation means that their loading-related bugs are caught and reported on the Harmony Report. It also means that the Harmony mod detected and reported the error in the mod, but was not itself the cause for the error.


The main reason is to provide some transparency to the release process.

Note that this list is not a recommendation; nothing should be inferred about the quality or usefulness of these mods, or their compatibility with each other. It can be that some of them conflict with each other because they try to accomplish the same effect. Many of these mods are broken or buggy. This list is not concerned with how well these mods work, alone or in combination.

The only concern is that they do not cause avoidable loading errors (like being loaded in the "wrong" order, or working as local mods but not as workshop mods).


This list was created from the top 60 most subscribed mods on the workshop.

Additionally, when a mod is causing loading errors, the author's other mods will automatically be added, as they are likely to contain the same bug(s). The added scrutiny means quality of mods should be improving quicker. Inclusion on this list doesn't mean the author has to do anything, unless bugs are found. On the other hand, being validated against Harmony doesn't mean your mod works well, or even works at all. It only means it loads without causing other mods to fail to load. It's a very low bar.

Additionally, when Hamony Mod bugs are reported, indicating faults that existed in previous releases due to insufficient testing, the mods that triggered Harmony bugs are added to this list, so that future Harmony releases will not be buggy for the same reasons, although new bugs may exist.

The "SUBSCRIBE ALL" is only meant to be used by the Harmony Mod author when preparing a new release. You can use it too, if you want to replicate the validation. However, subscribing to all these mods is unlikely to give you a good play experience; some of the mods here conflict with each other in subtle or obvious ways. You should be able to load any city with this mod set, and start the simulation, without any exceptions going unnoticed and unreported on the Harmony Report.