Function createChatAgent

apps/api/src/agents/app.ts:31–56

* Create one agent per model in the whitelist. All agents share the * same context schema, instruction builder, and dynamic tool composer * — they only differ by which provider model runs the conversation. * * The frontend "model picker" is an "agent picker" in disguise: it * just selects which

(entry: ChatModelEntry)

 * still throw at startup.
 */
function createChatAgent(entry: ChatModelEntry) {
  return defineAgent({
    name: entry.id,
    description: `OpenPanel chat assistant (${entry.label})`,
    model: resolveModel(entry),
    contextSchema: chatContextSchema,
    instruction: (context: ChatAgentContext) => buildSystemPrompt(context),
    tools: (context: ChatAgentContext) => composeChatTools(context),
    maxSteps: 20,
    // Reasoning-capable models (gpt-5.x / o-series) need the
    // `reasoning.summary` option to stream reasoning text back; the
    // client's REASONING_MESSAGE_* events feed our `ReasoningBlock`
    // UI. Non-reasoning models skip this block entirely.
    ...(entry.reasoning
      ? {
          defaultModelOptions: {
            reasoning: {
              effort: 'medium',
              summary: 'auto',
            },
          },
        }
      : {}),
    // biome-ignore lint/suspicious/noExplicitAny: see block comment above
  } as any);
}

/**
 * Dedicated cheap agent for generating 3-5 word conversation titles.