A completed call does not always mean its recording is ready_

Twilio documents call status and recording status as separate concerns. Recording media may not yet be accessible when a call completion callback arrives.

Applications that fetch a recording immediately after `completed` create intermittent failures that look like network instability.

What changes in practice_

Track the call and recording as related resources, use recording-specific callbacks, and make downstream processing resumable.

• Model call and recording state separately.
• Use provider event IDs for idempotency.
• Retry media processing without replaying business actions.

Our take_

The durable advantage is not adopting the newest tool first. It is building the identity, state, evidence, and operating boundaries that let a real team own the system after launch.