# Collecting Logs

Dynamic Apps turns application `console.log` and stdout, application
`console.error` and stderr, actor output, build progress, and enabled request
summaries into structured events.

For Cloud Run or Rivet Compute, write each event as one JSON line so the
platform can collect it:

```ts
import { setDynamicAppsLogHandler } from "@rivet-dev/dynamic-apps";

setDynamicAppsLogHandler((event) =>
	process.stdout.write(`${JSON.stringify(event)}\n`),
);
```

You can also enqueue events into a synchronous or buffered logger:

```ts
setDynamicAppsLogHandler((event) => {
	logger.log(event.level, event.message, event);
});
```

Each event includes a version, timestamp, level, source, and message. When
available, it also includes the app, release, request, actor, and output stream,
plus bounded metadata. Messages are limited to 64 KiB and carry
`metadata.truncated: true` when shortened.

Delivery is best effort and happens synchronously. Do not make blocking network
requests in the callback. Enqueue into your logging SDK instead. Request and
response bodies, authorization headers, environment variables, credentials,
and build source are excluded.