Add Power Grid NeoForge port submodule

README.md

@@ -1,17 +1,72 @@
 # Minecraft Renew Mod
 
-Local project area for Minecraft mod porting and prototyping.
+Local workspace for Minecraft mod porting and prototyping.
 
-## Current Port
+## Projects
 
-The first port target is `Create: Limited Draining`, located in `create-limited-draining/`.
+| Project | Path | Status |
+| --- | --- | --- |
+| Create: Limited Draining | `create-limited-draining/` | Local NeoForge 1.21.1 port |
+| Create: Power Grid | `power-grid/` | Official upstream NeoForge 1.21.1 branch tracked as a submodule |
+
+## Create: Limited Draining
 
 - Original project: https://github.com/JasdewStarfield/CreateLimitedDraining
-- Original license: MIT License, Copyright (c) 2024 Jasdew Starfield
-- Port target: Minecraft 1.21.1, NeoForge 21.1.x, Create 6.0.10
+- License: MIT License, Copyright (c) 2024 Jasdew Starfield
+- Target: Minecraft 1.21.1, NeoForge 21.1.x, Create 6.0.10
 
-## Rules
+Build:
 
-- Work on `feature/create-addon-port` for this port.
-- Do not push, merge, or publish without explicit approval.
-- Keep original license and attribution with any copied code or assets.
+```powershell
+cd create-limited-draining
+.\gradlew build
+```
+
+Artifact:
+
+```text
+create-limited-draining/build/libs/
+```
+
+## Create: Power Grid
+
+- Original project: https://github.com/patryk3211/PowerGrid
+- License: Apache License 2.0
+- Source branch: `architectury-1.21.1/dev`
+- Target: Minecraft 1.21.1, NeoForge, Create 6.0.10
+- Published reference: Modrinth version `0.5.5.1` for Minecraft 1.21.1 + NeoForge
+
+Clone submodules after checkout:
+
+```powershell
+git submodule update --init --recursive
+```
+
+Verify the NeoForge Java port without building native acceleration binaries:
+
+```powershell
+cd power-grid
+.\gradlew :forge:compileJava -x :native:buildWindows -x :native:buildLinux --no-daemon
+```
+
+Build a NeoForge JAR without native acceleration binaries:
+
+```powershell
+cd power-grid
+.\gradlew :forge:remapJar -x :native:buildWindows -x :native:buildLinux --no-daemon
+```
+
+Artifact:
+
+```text
+power-grid/forge/build/libs/powergrid-mc1.21.1-0.5.5.1.jar
+```
+
+The full upstream `:forge:build` also tries to build native acceleration binaries and may require CMake plus a working C/C++ toolchain.
+
+## Repository Rules
+
+- Work on `feature/create-addon-port` unless the user says otherwise.
+- Do not push, merge, publish, or create releases without explicit approval.
+- Keep original licenses and attribution with copied code, assets, and submodules.
+- Do not commit local run directories, generated worlds, Gradle caches, build outputs, logs, or secrets.