feat: integrate Pi backend and Pi Web

pi/packages/coding-agent/examples/extensions/provider-payload.ts

@@ -0,0 +1,18 @@
+import { appendFileSync } from "node:fs";
+import { join } from "node:path";
+import { CONFIG_DIR_NAME, type ExtensionAPI } from "@earendil-works/pi-coding-agent";
+
+export default function (pi: ExtensionAPI) {
+	pi.on("before_provider_request", (event, ctx) => {
+		const logFile = join(ctx.cwd, CONFIG_DIR_NAME, "provider-payload.log");
+		appendFileSync(logFile, `${JSON.stringify(event.payload, null, 2)}\n\n`, "utf8");
+
+		// Optional: replace the payload instead of only logging it.
+		// return { ...event.payload, temperature: 0 };
+	});
+
+	pi.on("after_provider_response", (event, ctx) => {
+		const logFile = join(ctx.cwd, CONFIG_DIR_NAME, "provider-payload.log");
+		appendFileSync(logFile, `[${event.status}] ${JSON.stringify(event.headers)}\n\n`, "utf8");
+	});
+}