Add license and README, document GIF cape + backend integration, cache CI

README.md

@@ -1,18 +1,34 @@
-# SkinsG
+# HDSkinSupportGravit
 
-Client-side Minecraft mod that adds **HD skins** (up to 2048×2048) and **animated GIF capes**
-(with HD & transparency), driven by a launcher/site asset API keyed on player UUID.
+Client-side Minecraft mod that adds **HD skins** (up to 2048×2048) and, importantly,
+**animated GIF cape support** — including HD and transparent GIFs — on top of a UUID-keyed
+asset API. Built for GravitLauncher setups but backend-agnostic.
 
 Currently targets **NeoForge 1.21.1**. Fabric/Forge and 1.20.1 / 1.19.2 are planned — the core
 (GIF decoder, cape state, mixins) is written to be loader/version agnostic.
 
 ## Features
 
-- HD skins: the legacy-skin conversion is rescaled so 128/256/…/2048-wide skins render correctly.
-- GIF capes: decoded once, then played back by copying a pre-composited frame per tick — no
-  per-frame decoding, no AWT, so it doesn't cost FPS. Playback speed comes from the GIF itself.
+- **HD skins**: the legacy-skin conversion is rescaled so 128/256/…/2048-wide skins render correctly.
+- **GIF capes**: animated capes decoded from GIF (HD, transparency, per-frame timing). Decoded once,
+  then played back by copying a pre-composited frame per tick — no per-frame decoding, no AWT, so it
+  doesn't cost FPS. Playback speed comes from the GIF itself (overridable per player).
 - HD PNG capes fall through to the vanilla renderer untouched.
-- Per-player control and persistence (see below).
+- Per-player control and persistence.
+
+## Backend integration (easy)
+
+The mod talks to your existing site/launcher backend over plain HTTP — no server-side plugin needed.
+Set one value (`baseUrl`) in the config and the mod requests:
+
+```
+GET <baseUrl>/api/minecraft/cape/<uuid>?gif
+```
+
+If the response is a GIF it is animated; anything else (PNG / 404) keeps the vanilla cape. This maps
+cleanly onto most launcher-site engines (DLE-based sites, custom backends, etc.) — you just expose
+that one endpoint returning the player's GIF cape by UUID. HD skins use the normal skin URL your
+launcher already serves, so they need no extra endpoint.
 
 ## Install
 
@@ -34,8 +50,7 @@ fetched until you set it.
 }
 ```
 
-- `baseUrl` — root of your asset API. The mod requests `"<baseUrl>/api/minecraft/cape/<uuid>?gif"`;
-  if the response is a GIF it is animated, otherwise the vanilla cape is kept.
+- `baseUrl` — root of your asset API (no hardcoded host in the mod).
 - `globalSpeed` — playback speed in percent (`100` = the GIF's own timing).
 - The rest is managed by the in-game commands and shouldn't be edited by hand.
 
@@ -69,4 +84,5 @@ Output: `build/libs/skinsg-<version>.jar`. Requires JDK 21.
 
 ## License
 
-All rights reserved.
+Free to use and modify for any purpose. Commercial use must credit the author (Nghtly).
+See [LICENSE](LICENSE).