Stricter prompt to avoid chatty responses

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[e-mail]>

cli.ts

···
 
 const { textStream } = streamText({
   model: anthropic("claude-haiku-4-5-20251001"),
-  system: "Convert to shell command. Output ONLY the raw command. No markdown, no code fences, no explanation.",
+  system: "Convert natural language to a shell command. Output ONLY the command itself - no explanations, no markdown, no alternatives, no questions. Make reasonable assumptions. One line only.",
   prompt: input.trim(),
   onError({ error }: { error: any }) {
     const msg = error.statusCode === 401 ? "Invalid API key"