refactor(agent): split runner, tools, output, types

src/agent/runner.ts

@@ -0,0 +1,29 @@
+import { Agent as PiAgentCore, type AgentEvent } from "@mariozechner/pi-agent-core";
+import type { AgentOptions, AgentRunResult } from "./types.js";
+import { createAgentOutput } from "./output.js";
+import { resolveModel, resolveTools } from "./tools.js";
+
+export class Agent {
+  private readonly agent: PiAgentCore;
+  private readonly output;
+
+  constructor(options: AgentOptions = {}) {
+    const stdout = options.logger?.stdout ?? process.stdout;
+    const stderr = options.logger?.stderr ?? process.stderr;
+    this.output = createAgentOutput({ stdout, stderr });
+
+    this.agent = new PiAgentCore();
+    if (options.systemPrompt) this.agent.setSystemPrompt(options.systemPrompt);
+    if (options.thinkingLevel) this.agent.setThinkingLevel(options.thinkingLevel);
+
+    this.agent.setModel(resolveModel(options));
+    this.agent.setTools(resolveTools(options));
+    this.agent.subscribe((event: AgentEvent) => this.output.handleEvent(event));
+  }
+
+  async run(prompt: string): Promise<AgentRunResult> {
+    this.output.state.lastAssistantText = "";
+    await this.agent.prompt(prompt);
+    return { text: this.output.state.lastAssistantText, error: this.agent.state.error };
+  }
+}