Build channel-aware agents

export default function channelPolicy(pi) {
  pi.on("before_agent_start", (event, ctx) => {
    const external = ctx.external;

    if (!external) {
      return;
    }

    const instruction =
      external.provider === "slack"
        ? "Use short paragraphs suitable for Slack."
        : external.provider === "microsoft_teams"
          ? "Use a concise Teams-friendly response."
          : "Use a concise chat response.";

    return {
      systemPrompt: `${event.systemPrompt}\n\n${instruction}`,
    };
  });
}

pi.registerTool({
  name: "current_conversation",
  description: "Return the current external conversation identity.",
  parameters: {
    type: "object",
    properties: {},
    additionalProperties: false,
  },
  async execute(_id, _params, _signal, _update, ctx) {
    if (!ctx.external) {
      return {
        content: [
          { type: "text", text: "This turn is not from a chat integration." },
        ],
      };
    }

    return {
      content: [
        {
          type: "text",
          text: JSON.stringify({
            provider: ctx.external.provider,
            conversationId: ctx.external.conversationId,
            conversationType: ctx.external.conversationType,
          }),
        },
      ],
    };
  },
});