chore: initial project setup

.gitignore

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+# Claude Code + GSD planning (local only)
+.claude/
+.planning/
+
+# Gradle
+.gradle/
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/**/build/
+gradle-app.setting
+.gradletasknamecache
+
+# Java
+*.class
+*.jar
+*.war
+*.ear
+*.nar
+hs_err_pid*
+replay_pid*
+!gradle/wrapper/gradle-wrapper.jar
+
+# IntelliJ IDEA
+.idea/
+*.iml
+*.iws
+*.ipr
+out/
+
+# Eclipse
+.project
+.classpath
+.settings/
+bin/
+
+# VS Code
+.vscode/
+*.code-workspace
+
+# OS
+.DS_Store
+Thumbs.db
+desktop.ini
+
+# Hytale dev server / local run artifacts
+/run/
+/server/
+*.log
+logs/
+
+# Decompilation + local tooling (cfr.jar, server jar, decompiled sources)
+.tools/
+
+# Secrets / local env
+.env
+.env.local
+*.local

CLAUDE.md

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+<!-- GSD:project-start source:PROJECT.md -->
+## Project
+
+**ChainLightning Sceptre**
+
+Plugin Hytale (Mythlane) — un sceptre magique qui lance une foudre en chaîne. Le joueur cible un mob ; l'éclair saute jusqu'à 5 cibles consécutives dans un rayon de 8 blocs, avec des dégâts dégressifs et une traînée électrique visible (particles + son atténué).
+
+**Plateforme :** Hytale Plugin API (serveur 2026.03.26-89796e57b), Java 25, Gradle Shadow.
+
+**Core Value:** **La mécanique de chaînage visuellement unique** — pas un projectile classique. C'est ce qui différencie le plugin de Wan's Wonder Weapons (342K downloads free) et exploite la catégorie magie quasi-vide sur BlockyBlockyBlock (1 seul plugin payant).
+<!-- GSD:project-end -->
+
+<!-- GSD:stack-start source:STACK.md -->
+## Technology Stack
+
+Technology stack not yet documented. Will populate after codebase mapping or first phase.
+<!-- GSD:stack-end -->
+
+<!-- GSD:conventions-start source:CONVENTIONS.md -->
+## Conventions
+
+Conventions not yet established. Will populate as patterns emerge during development.
+<!-- GSD:conventions-end -->
+
+<!-- GSD:architecture-start source:ARCHITECTURE.md -->
+## Architecture
+
+Architecture not yet mapped. Follow existing patterns found in the codebase.
+<!-- GSD:architecture-end -->
+
+<!-- GSD:skills-start source:skills/ -->
+## Project Skills
+
+No project skills found. Add skills to any of: `.claude/skills/`, `.agents/skills/`, `.cursor/skills/`, `.github/skills/`, or `.codex/skills/` with a `SKILL.md` index file.
+<!-- GSD:skills-end -->
+
+<!-- GSD:workflow-start source:GSD defaults -->
+## GSD Workflow Enforcement
+
+Before using Edit, Write, or other file-changing tools, start work through a GSD command so planning artifacts and execution context stay in sync.
+
+Use these entry points:
+- `/gsd-quick` for small fixes, doc updates, and ad-hoc tasks
+- `/gsd-debug` for investigation and bug fixing
+- `/gsd-execute-phase` for planned phase work
+
+Do not make direct repo edits outside a GSD workflow unless the user explicitly asks to bypass it.
+<!-- GSD:workflow-end -->
+
+
+
+<!-- GSD:profile-start -->
+## Developer Profile
+
+> Profile not yet configured. Run `/gsd-profile-user` to generate your developer profile.
+> This section is managed by `generate-claude-profile` -- do not edit manually.
+<!-- GSD:profile-end -->