docs(consultation): Gemini response — Rules Mod build strategy confirmed

Key findings:
- moddev 2.0.74-beta valid, NeoForge 21.1.65 stable target
- Cannot bypass Gradle (reobfuscation required)
- 1.16.5 needs Java 8, HttpURLConnection, StringTextComponent
- SDKMAN for Java version management
- Official MDK bases for each Forge version

Claude (Chronicler #83 - The Compiler) <claude@firefrostgaming.com>

docs/consultations/gemini-rules-mod-compilation-2026-04-12.md

@@ -89,3 +89,43 @@ The NeoForge 1.21.1 source uses APIs that changed significantly across versions:
 Thanks Gemini! This is Holly's top priority — she wants the servers to feel like home, and `/rules` is part of that. 🔥❄️
 
 — Michael + Claude (Chronicler #83 — The Compiler)
+
+---
+
+## Gemini's Response (April 12, 2026)
+
+**Summary:** Full validation of approach + detailed port guide for all 3 versions. No shortcuts — must use Gradle toolchain due to reobfuscation requirement.
+
+### Key Answers:
+
+1. **NeoForge 1.21.1:** `moddev 2.0.74-beta` is valid. Use NeoForge version `21.1.65` (stable).
+
+2. **Forge 1.20.1 port:** Namespace swap `net.neoforged.*` → `net.minecraftforge.*`. `ModConfigSpec` → `ForgeConfigSpec`. Meta file: `mods.toml` (not `neoforge.mods.toml`).
+
+3. **Forge 1.16.5 port (heaviest lift):**
+   - **Must target Java 8** (many servers run Java 8)
+   - `Component.literal()` → `new StringTextComponent()`
+   - `java.net.http.HttpClient` → `java.net.HttpURLConnection` (HttpClient is Java 11+)
+   - Config: `ForgeConfigSpec`, meta: `mods.toml`
+
+4. **Gradle versions:** 1.21.1 needs Gradle 8.6+/Java 21. 1.20.1 needs Gradle 8.x/Java 17. 1.16.5 needs Gradle 7.x/Java 8.
+
+5. **Cannot simplify with raw javac** — Forge uses **reobfuscation** (reobfJar) during build. Code is written with mapped readable names but server runs obfuscated SRG names. Gradle translates between them. Raw javac output would crash the server.
+
+### Build Strategy:
+- Use SDKMAN to swap Java versions (21, 17, 8)
+- Use official MDK bases for 1.20.1 and 1.16.5 (don't downgrade the 1.21.1 build.gradle)
+- Upload via WebDAV to NextCloud
+
+---
+
+## Conclusion
+
+Gemini confirmed the approach is sound. Three separate project scaffolds needed, each with its own Gradle wrapper and MDK base. The 1.16.5 port requires HttpURLConnection rewrite and StringTextComponent swap.
+
+**Next Steps:**
+1. Install SDKMAN + Java 17 + Java 8
+2. Build NeoForge 1.21.1 first (closest to existing code)
+3. Download Forge 1.20.1 MDK, port code
+4. Download Forge 1.16.5 MDK, port code with HTTP rewrite
+5. Upload all 3 jars to NextCloud via WebDAV