Initial commit: Superpowers plugin v1.0.0

Core skills library as Claude Code plugin:
- Testing skills: TDD, async testing, anti-patterns
- Debugging skills: Systematic debugging, root cause tracing
- Collaboration skills: Brainstorming, planning, code review
- Meta skills: Creating and testing skills

Features:
- SessionStart hook for context injection
- Skills-search tool for discovery
- Commands: /brainstorm, /write-plan, /execute-plan
- Data directory at ~/.superpowers/

skills/collaboration/remembering-conversations/tool/src/search-cli.ts

@@ -0,0 +1,28 @@
+import { searchConversations, formatResults, SearchOptions } from './search.js';
+
+const query = process.argv[2];
+const mode = (process.argv[3] || 'vector') as 'vector' | 'text' | 'both';
+const limit = parseInt(process.argv[4] || '10');
+const after = process.argv[5] || undefined;
+const before = process.argv[6] || undefined;
+
+if (!query) {
+  console.error('Usage: search-conversations <query> [mode] [limit] [after] [before]');
+  process.exit(1);
+}
+
+const options: SearchOptions = {
+  mode,
+  limit,
+  after,
+  before
+};
+
+searchConversations(query, options)
+  .then(results => {
+    console.log(formatResults(results));
+  })
+  .catch(error => {
+    console.error('Error searching:', error);
+    process.exit(1);
+  });