feat(skills): add 6 generalized AI-driven development skills

- version-bumper: automated multi-file version synchronization
- plugin-scaffolder: standardized 12-language i18n template generation
- doc-mirror-sync: automated README to docs mirroring
- i18n-validator: dictionary key alignment analysis via AST
- gh-issue-replier: professional English reply with star-check logic
- gh-issue-scheduler: unanswered issue audit and action planning

.gemini/skills/version-bumper/SKILL.md

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+---
+name: version-bumper
+description: Automates version upgrades and changelog synchronization across 7+ files (Code, READMEs, Docs). Use when a plugin is ready for release to ensure version consistency.
+---
+
+# Version Bumper
+
+## Overview
+This skill ensures that every version upgrade is synchronized across the entire repository, following the strict "Documentation Sync" rule in GEMINI.md.
+
+## Workflow
+1. **Prepare Info**: Gather the new version number and brief changelogs in both English and Chinese.
+2. **Auto-Patch**: The skill will help you identify and update:
+   - `plugins/.../name.py` (docstring version)
+   - `plugins/.../README.md` (metadata & What's New)
+   - `plugins/.../README_CN.md` (metadata & 最新更新)
+   - `docs/plugins/...md` (mirrors)
+   - `docs/plugins/index.md` (version badge)
+   - `README.md` (updated date badge)
+3. **Verify**: Check the diffs to ensure no formatting was broken.
+
+## Tool Integration
+Execute the bump script (draft):
+```bash
+python3 scripts/bump.py <version> "<message_en>" "<message_zh>"
+```

.gemini/skills/version-bumper/scripts/bump.py

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+#!/usr/bin/env python3
+import sys
+import os
+import re
+from datetime import datetime
+
+def patch_file(file_path, old_pattern, new_content, is_regex=False):
+    if not os.path.exists(file_path):
+        print(f"Warning: File not found: {file_path}")
+        return False
+    
+    with open(file_path, 'r', encoding='utf-8') as f:
+        content = f.read()
+    
+    if is_regex:
+        new_content_result = re.sub(old_pattern, new_content, content, flags=re.MULTILINE)
+    else:
+        new_content_result = content.replace(old_pattern, new_content)
+    
+    if new_content_result != content:
+        with open(file_path, 'w', encoding='utf-8') as f:
+            f.write(new_content_result)
+        print(f"✅ Patched: {file_path}")
+        return True
+    else:
+        print(f"ℹ️ No change needed: {file_path}")
+        return False
+
+def bump_version(plugin_type, plugin_name, new_version, msg_en, msg_zh):
+    print(f"🚀 Bumping {plugin_name} ({plugin_type}) to {new_version}...")
+    
+    today = datetime.now().strftime("%Y-%m-%d")
+    today_badge = today.replace("-", "--")
+    
+    # 1. Patch Plugin Python File
+    py_file = f"plugins/{plugin_type}/{plugin_name}/{plugin_name}.py"
+    patch_file(py_file, r"version: \d+\.\d+\.\d+", f"version: {new_version}", is_regex=True)
+    
+    # 2. Patch Plugin READMEs
+    readme_en = f"plugins/{plugin_type}/{plugin_name}/README.md"
+    readme_zh = f"plugins/{plugin_type}/{plugin_name}/README_CN.md"
+    
+    # Update version in metadata
+    patch_file(readme_en, r"\*\*Version:\*\* \d+\.\d+\.\d+", f"**Version:** {new_version}", is_regex=True)
+    patch_file(readme_zh, r"\*\*版本:\*\* \d+\.\d+\.\d+", f"**版本:** {new_version}", is_regex=True)
+    
+    # Update What's New (Assuming standard headers)
+    patch_file(readme_en, r"## 🔥 What's New in v.*?\n", f"## 🔥 What's New in v{new_version}\n\n* {msg_en}\n", is_regex=True)
+    patch_file(readme_zh, r"## 🔥 最新更新 v.*?\n", f"## 🔥 最新更新 v{new_version}\n\n* {msg_zh}\n", is_regex=True)
+    
+    # 3. Patch Docs Mirrors
+    doc_en = f"docs/plugins/{plugin_type}/{plugin_name}.md"
+    doc_zh = f"docs/plugins/{plugin_type}/{plugin_name}.zh.md"
+    patch_file(doc_en, r"\*\*Version:\*\* \d+\.\d+\.\d+", f"**Version:** {new_version}", is_regex=True)
+    patch_file(doc_zh, r"\*\*版本:\*\* \d+\.\d+\.\d+", f"**版本:** {new_version}", is_regex=True)
+    
+    # 4. Patch Root READMEs (Updated Date Badge)
+    patch_file("README.md", r"badge/202\d--\d\d--\d\d-gray", f"badge/{today_badge}-gray", is_regex=True)
+    patch_file("README_CN.md", r"badge/202\d--\d\d--\d\d-gray", f"badge/{today_badge}-gray", is_regex=True)
+
+    print("\n✨ All synchronization tasks completed.")
+    return True
+
+if __name__ == "__main__":
+    if len(sys.argv) < 6:
+        print("Usage: bump.py <type> <name> <version> <msg_en> <msg_zh>")
+        print("Example: bump.py filters markdown_normalizer 1.2.8 'Fix bug' '修复错误'")
+        sys.exit(1)
+    
+    bump_version(sys.argv[1], sys.argv[2], sys.argv[3], sys.argv[4], sys.argv[5])