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Start with the job. Drop into the API reference only when you need the exact signature.

I want to pilot one enrichment before scaling

Use a prebuilt play first. Inspect the input contract, run one real record, and review the output before touching a CSV.

I want to enrich a lead CSV

Use ctx.csv(...) plus ctx.dataset(...).withColumn(...) so every row has a stable identity, progress, retries, and exportable columns.

I want a workflow to run every morning

Put the schedule in the third definePlay(...) argument. Keep a manual test command beside the publish command so you can prove the logic before waiting for cron.

I want another system to trigger a play

Use a webhook binding for inbound events. Start with a plain webhook only while testing; add HMAC before production when the sender supports it.

I want to call Deepline from an app

Use the TypeScript SDK for app code, Python/HTTP for non-TypeScript runtimes, and the CLI for agent-run workflows.