Reorganize: Move all skills to skills/ folder

- Created skills/ directory
- Moved 272 skills to skills/ subfolder
- Kept agents/ at root level
- Kept installation scripts and docs at root level

Repository structure:
- skills/           - All 272 skills from skills.sh
- agents/           - Agent definitions
- *.sh, *.ps1       - Installation scripts
- README.md, etc.   - Documentation

Co-Authored-By: Claude <noreply@anthropic.com>

skills/plugins/examples/knowledge-base/commands/add.ts

@@ -0,0 +1,77 @@
+/**
+ * Knowledge Add Command
+ * Add knowledge entries to your knowledge base
+ */
+
+import { writeFileSync, readFileSync, existsSync, mkdirSync } from 'fs'
+import { join } from 'path'
+import { homedir } from 'os'
+
+export interface AddOptions {
+  content: string
+  tags?: string[]
+  category?: string
+  title?: string
+  source?: string
+}
+
+const KNOWLEDGE_DIR = join(homedir(), '.claude', 'knowledge')
+const KNOWLEDGE_FILE = join(KNOWLEDGE_DIR, 'knowledge.json')
+
+interface KnowledgeEntry {
+  id: string
+  title?: string
+  content: string
+  tags: string[]
+  category: string
+  source?: string
+  timestamp: string
+}
+
+export async function handle(args: AddOptions, context: any): Promise<string> {
+  const { content, tags = [], category = 'general', title, source } = args
+
+  try {
+    // Ensure knowledge directory exists
+    if (!existsSync(KNOWLEDGE_DIR)) {
+      mkdirSync(KNOWLEDGE_DIR, { recursive: true })
+    }
+
+    // Load existing knowledge
+    let knowledge: KnowledgeEntry[] = []
+
+    if (existsSync(KNOWLEDGE_FILE)) {
+      const data = readFileSync(KNOWLEDGE_FILE, 'utf-8')
+      knowledge = JSON.parse(data)
+    }
+
+    // Create new entry
+    const entry: KnowledgeEntry = {
+      id: generateId(),
+      title,
+      content,
+      tags,
+      category,
+      source,
+      timestamp: new Date().toISOString(),
+    }
+
+    knowledge.push(entry)
+
+    // Save knowledge
+    writeFileSync(KNOWLEDGE_FILE, JSON.stringify(knowledge, null, 2), 'utf-8')
+
+    return `✓ Knowledge entry added (ID: ${entry.id})\n` +
+           `  Category: ${category}\n` +
+           `  Tags: ${tags.join(', ') || 'none'}\n` +
+           `  Total entries: ${knowledge.length}`
+  } catch (error: any) {
+    throw new Error(`Failed to add knowledge: ${error.message}`)
+  }
+}
+
+function generateId(): string {
+  return Date.now().toString(36) + Math.random().toString(36).substr(2)
+}
+
+export default { handle }