feat(agent): add pi-agent core integration and test CLI

src/agent/cli.ts

@@ -0,0 +1,103 @@
+#!/usr/bin/env node
+import { Agent } from "./agent.js";
+
+type CliOptions = {
+  provider?: string;
+  model?: string;
+  system?: string;
+  thinking?: string;
+  cwd?: string;
+  help?: boolean;
+};
+
+function printUsage() {
+  console.log("Usage: pnpm agent:cli [--provider PROVIDER] [--model MODEL] [--system TEXT] [--thinking LEVEL] [--cwd DIR] <prompt>");
+  console.log("       echo \"your prompt\" | pnpm agent:cli");
+}
+
+function parseArgs(argv: string[]) {
+  const args = [...argv];
+  const opts: CliOptions = {};
+  const promptParts: string[] = [];
+
+  while (args.length > 0) {
+    const arg = args.shift();
+    if (!arg) break;
+    if (arg === "--help" || arg === "-h") {
+      opts.help = true;
+      break;
+    }
+    if (arg === "--provider") {
+      opts.provider = args.shift();
+      continue;
+    }
+    if (arg === "--model") {
+      opts.model = args.shift();
+      continue;
+    }
+    if (arg === "--system") {
+      opts.system = args.shift();
+      continue;
+    }
+    if (arg === "--thinking") {
+      opts.thinking = args.shift();
+      continue;
+    }
+    if (arg === "--cwd") {
+      opts.cwd = args.shift();
+      continue;
+    }
+    if (arg === "--") {
+      promptParts.push(...args);
+      break;
+    }
+    promptParts.push(arg);
+  }
+
+  return { opts, prompt: promptParts.join(" ") };
+}
+
+async function readStdin() {
+  if (process.stdin.isTTY) return "";
+  return new Promise<string>((resolve, reject) => {
+    let data = "";
+    process.stdin.setEncoding("utf8");
+    process.stdin.on("data", (chunk) => (data += chunk));
+    process.stdin.on("end", () => resolve(data.trim()));
+    process.stdin.on("error", reject);
+  });
+}
+
+async function main() {
+  const { opts, prompt } = parseArgs(process.argv.slice(2));
+  if (opts.help) {
+    printUsage();
+    return;
+  }
+
+  const stdinPrompt = await readStdin();
+  const finalPrompt = prompt || stdinPrompt;
+  if (!finalPrompt) {
+    printUsage();
+    process.exit(1);
+  }
+
+  const agent = new Agent({
+    provider: opts.provider,
+    model: opts.model,
+    systemPrompt: opts.system,
+    thinkingLevel: opts.thinking as any,
+    cwd: opts.cwd,
+  });
+
+  const result = await agent.run(finalPrompt);
+  if (result.error) {
+    console.error(`Error: ${result.error}`);
+    process.exitCode = 1;
+  }
+}
+
+main().catch((err) => {
+  console.error(err?.stack || String(err));
+  process.exit(1);
+});