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Create a new podcast and batch-generate its episodes from a prompt. Jellypod creates the podcast, then asynchronously plans episode topics, writes scripts, and generates audio. Provide your own `title` and `description`, or omit them to have the LLM generate them from the prompt. The series plan (podcast metadata and episode outlines) is generated synchronously via LLM before the response is returned. Episode audio generation happens asynchronously after the response. Returns `202 Accepted` with the full podcast and episode stubs (including LLM-generated titles). Poll individual episodes via `GET /v1/episodes/{id}` to check audio generation progress. **Generation time:** 5–30 minutes depending on the number of episodes and their length. The initial response (with titles) takes ~5–15 seconds. **Rate limit:** Counts as `num_episodes` requests against the episode generation rate limit (10 req/min). **Concurrent limit:** Max 5 episodes generating simultaneously per organization. Returns `429` with `concurrent_limit_exceeded` if exceeded.