Until now nothing you've written changes state. This week you create tasks and events — but you do it idempotently: list first, check for an existing match, create only if missing. That single discipline turns a one-shot script into something you can re-run at any time without creating duplicates.
What if the API call fails halfway? Do I retry, or does that risk double-writes?
Retries are safe exactly because the writes are idempotent. You retry freely, and each retry either finds the existing record or creates it once. That combination — idempotency + retry — is the foundation of every production automation.
So by Friday I can write once, retry as needed, and never create a duplicate even if I re-run ten times?
That is the week's end state. Add validate-before-write on Day 21 and you have the three disciplines that make Week 4's orchestration possible.
Goal: Writes you can run again without fear.
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Until now nothing you've written changes state. This week you create tasks and events — but you do it idempotently: list first, check for an existing match, create only if missing. That single discipline turns a one-shot script into something you can re-run at any time without creating duplicates.
What if the API call fails halfway? Do I retry, or does that risk double-writes?
Retries are safe exactly because the writes are idempotent. You retry freely, and each retry either finds the existing record or creates it once. That combination — idempotency + retry — is the foundation of every production automation.
So by Friday I can write once, retry as needed, and never create a duplicate even if I re-run ten times?
That is the week's end state. Add validate-before-write on Day 21 and you have the three disciplines that make Week 4's orchestration possible.
Goal: Writes you can run again without fear.