fix: Refactor mojmap mapping handling

Replace broken mojang2tiny with custom mapping-io CLI wrapper to fix mojmap method/field name remapping.

The old approach produced invalid Tiny v2 files where fields/methods weren't nested under parent classes, causing tiny-remapper to only remap class names while leaving method_XXXXX and field_XXXXX intermediary names in decompiled source.

Changes:
  - Built custom mapping-io-cli JAR tool (bundled in tools/mapping-io-cli/)
  - Implements proper ProGuard descriptor remapping (named → obfuscated → intermediary)
  - Ensures Tiny v2 output has correct nesting structure for tiny-remapper
  - Removed deprecated mojang2tiny dependency and conversion utilities
  - Added ignoreConflicts option to tiny-remapper wrapper (not currently needed)
  - Added comprehensive test suites for mojmap structure and name verification
  - Updated .gitignore to exclude Gradle build artifacts but keep final JARs

Author: GhostTypes

.claude/settings.local.json

@@ -34,9 +34,19 @@
       "Skill(readme-generator)",
       "Skill(repo-sweep)",
       "Bash(git check-ignore:*)",
-      "Bash(del REMAINING_WORK.md)"
+      "Bash(del REMAINING_WORK.md)",
+      "Skill(mcp-publisher)",
+      "Bash(python:*)",
+      "Skill(mcp-publish)",
+      "Bash(gradle wrapper:*)",
+      "Bash(./gradlew shadowJar:*)",
+      "Bash(./gradlew clean:*)",
+      "Bash(unzip:*)",
+      "Bash(javap -p -)"
     ]
   },
   "enableAllProjectMcpServers": true,
-  "enabledMcpjsonServers": ["minecraft-dev"]
+  "enabledMcpjsonServers": [
+    "minecraft-dev"
+  ]
 }

.claude/skills/mcp-publish/SKILL.md

@@ -0,0 +1,83 @@
+---
+name: mcp-publish
+description: Guide for publishing MCP servers to NPM (TypeScript/Node.js) or UVX (Python). Use when preparing MCP servers for public distribution, validating package configuration, or walking through the npm publish or uvx/PyPI publishing workflow. Triggers include requests to publish, release, or distribute MCP servers.
+---
+
+# MCP Server Publishing
+
+Guides publishing MCP servers to NPM or PyPI/UVX.
+
+## Workflow
+
+1. Detect server type
+2. Run validation script
+3. Fix issues
+4. Publish
+
+## Type Detection
+
+Check project root:
+- `package.json` -> TypeScript/Node.js -> See references/npm.md
+- `pyproject.toml` -> Python -> See references/uvx.md
+
+If both exist, ask which runtime the server targets.
+
+## Validation
+
+Run before publishing:
+
+**TypeScript/Node.js:**
+```bash
+python <skill-path>/scripts/validate_npm.py <project-path>
+```
+
+**Python:**
+```bash
+python <skill-path>/scripts/validate_uvx.py <project-path>
+```
+
+Replace `<skill-path>` with this skill's location and `<project-path>` with the MCP server directory.
+
+Fix all errors before proceeding to publish.
+
+## Repository URL Validation
+
+After running validation, check that the package manifest matches the git remote:
+
+1. Get the configured git remote: `git remote get-url origin`
+2. Compare with repository field in package.json or pyproject.toml
+3. If mismatch, confirm with user which is correct before proceeding
+4. Update the manifest file if needed
+
+## README Installation Section
+
+Before publishing, verify and update the README installation instructions.
+
+Validation checks for all four installation methods:
+
+**TypeScript/Node.js:**
+- npx command: `npx @scope/package-name`
+- Global install: `npm install -g @scope/package-name`
+- Claude Desktop config (claude_desktop_config.json with mcpServers)
+- Claude Code CLI: `claude mcp add`
+
+**Python:**
+- uvx command: `uvx package-name`
+- Pip install: `pip install package-name`
+- Claude Desktop config (claude_desktop_config.json with mcpServers)
+- Claude Code CLI: `claude mcp add`
+
+Update README sections automatically if any methods are missing.
+
+## Pre-Publish Checklist
+
+Verify before any publish:
+
+1. Version incremented from last release
+2. README.md exists with server description
+3. LICENSE file present
+4. No secrets in committed files
+5. Build artifacts excluded via .gitignore
+6. Server runs locally without errors
+7. Repository URL in manifest matches git remote
+8. README installation instructions are correct

.claude/skills/mcp-publish/references/npm.md

@@ -0,0 +1,193 @@
+# NPM Publishing Guide
+
+Publishing TypeScript/Node.js MCP servers to NPM.
+
+## Required package.json Fields
+
+```json
+{
+  "name": "@scope/mcp-server-name",
+  "version": "1.0.0",
+  "description": "MCP server for X",
+  "type": "module",
+  "bin": {
+    "mcp-server-name": "./dist/index.js"
+  },
+  "files": [
+    "dist"
+  ],
+  "scripts": {
+    "build": "tsc",
+    "prepublishOnly": "npm run build"
+  },
+  "keywords": ["mcp", "mcp-server"],
+  "license": "MIT",
+  "engines": {
+    "node": ">=18"
+  }
+}
+```
+
+Key requirements:
+- `name`: Use `@scope/mcp-server-*` format or `mcp-server-*` for unscoped
+- `version`: Semver format, increment for each release
+- `type`: Must be `"module"` for ESM
+- `bin`: Entry point for npx execution, must point to compiled JS with shebang
+- `files`: Include only the dist directory
+- `prepublishOnly`: Ensures build runs before publish
+
+## Entry Point Shebang
+
+The compiled entry point (dist/index.js) must have a shebang. Add to source:
+
+```typescript
+#!/usr/bin/env node
+```
+
+TypeScript must preserve this. Check tsconfig.json:
+
+```json
+{
+  "compilerOptions": {
+    "outDir": "./dist",
+    "module": "NodeNext",
+    "moduleResolution": "NodeNext",
+    "target": "ES2022"
+  }
+}
+```
+
+## Build Verification
+
+Before publishing:
+
+```bash
+npm run build
+node dist/index.js --help  # or appropriate test
+```
+
+## NPM Authentication
+
+First-time setup:
+```bash
+npm login
+```
+
+For scoped packages, ensure scope is linked to your account or org.
+
+## Publishing Commands
+
+Dry run first:
+```bash
+npm publish --dry-run
+```
+
+Actual publish:
+```bash
+# Unscoped or private scope
+npm publish
+
+# Public scoped package
+npm publish --access public
+```
+
+## Version Management
+
+Use npm version commands:
+```bash
+npm version patch  # 1.0.0 -> 1.0.1
+npm version minor  # 1.0.0 -> 1.1.0
+npm version major  # 1.0.0 -> 2.0.0
+```
+
+This updates package.json and creates a git tag.
+
+## Post-Publish Verification
+
+```bash
+npx @scope/mcp-server-name --help
+```
+
+Or for unscoped:
+```bash
+npx mcp-server-name --help
+```
+
+## Common Issues
+
+**"ERR! 403 Forbidden"**: Package name taken or not authenticated
+**"ERR! 404 Not Found"**: Scope doesn't exist, create org first
+**"bin not found"**: Missing files array or wrong bin path
+**"SyntaxError: Cannot use import"**: Missing `"type": "module"`
+
+## Repository Field
+
+Add repository URL to package.json:
+
+```json
+{
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/user/repo.git"
+  }
+}
+```
+
+Or shorthand:
+```json
+{
+  "repository": "github:user/repo"
+}
+```
+
+Validation script checks this matches the git remote. Fix mismatches before publishing.
+
+## README Installation Section
+
+Include all installation methods in README:
+
+```markdown
+## Installation
+
+### Quick Start (npx)
+
+Run directly without installing:
+
+```bash
+npx @scope/mcp-server-name
+```
+
+### Global Installation
+
+Install globally for repeated use:
+
+```bash
+npm install -g @scope/mcp-server-name
+mcp-server-name
+```
+
+### Claude Desktop
+
+Add to your `claude_desktop_config.json`:
+
+```json
+{
+  "mcpServers": {
+    "server-name": {
+      "command": "npx",
+      "args": ["-y", "@scope/mcp-server-name"]
+    }
+  }
+}
+```
+
+### Claude Code
+
+Add using the CLI:
+
+```bash
+claude mcp add server-name -- npx -y @scope/mcp-server-name
+```
+```
+
+Validation script checks README contains all four installation methods.