Next release runs on UE 5.8 too — same zip works on 5.7 and 5.8, landing this weekend

[tumourlove]

Quick heads up — the next Monolith drop runs on both UE 5.7 and 5.8 out of one release. Aiming to get it out sometime this weekend.

5.8 broke the plugin build in seven spots. Most of it is just the usual engine-version churn:

• The big one — FJsonObject's map keys changed from FString to a shared-string type with no ToLower() and no implicit conversion, which rippled through ~90 JSON key sites across 11 modules. Wrapped those in a couple of helpers.
• A few headers/structs that got moved, renamed, or removed (RigVM asset header, a mesh-merge setting, a string-table signature gained an arg).
• One PoseSearch anim-notify class is just gone in 5.8 — gated it out.
• MonolithAnimation now links Slate/SlateCore explicitly; 5.7 gave them to it transitively, 5.8 doesn't.

All of it is fenced behind #if ENGINE_MAJOR_VERSION == 5 && ENGINE_MINOR_VERSION >= 8, so the 5.7 paths are untouched — if you're staying on 5.7, nothing about your setup changes.

The one place 5.8 genuinely removed something with no drop-in replacement is foot ground-lock / speed planting (reworked into a spring model engine-side). That single action now returns a clean "unsupported on 5.8" instead of misbehaving. Everything else carries straight over.

Tested it on 5.8: editor builds clean, plugin loads (1,360 actions on my test build), full engine source index builds with no errors. 5.7 is still the daily driver here and stays that way.

So — one zip, pick your engine, it works. Full notes when it ships.

o7