Complete procedures with a way back.

Create deterministic JSONL requests, upload and submit a bounded batch, poll without duplication, reconcile output and error files by custom ID, report cost, and safely resume only missing work.

Build an asynchronous Claude batch pipeline with deterministic custom IDs, durable manifests, bounded request construction, polling and cancellation, unordered JSONL result ingestion, per-item success and failure states, usage accounting, retention-aware export, and safe replay of only unresolved work.