Plan idempotency keys for writes

Prompt that plans stable idempotency keys so write retries do not double side effects. Paste it into an AI tool of your choice, which then plans idempotency keys for writes.

Topic: Apps & prototypes
Type: Prompt
Level: Intermediate
Time: about 15 min

Results depend on the tool, the model and what you enter.

Result preview

Example: written by our editors, not real AI output.

Write: capture payment Caller: mobile + worker retry Key: client-minted UUID per intent Store: DB unique (key, merchant) TTL: 48 h Replay: return original capture id Tests: double POST, timeout then retry

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WriteWhat is written?

CallerWho retries?

StoreWhere is the key kept?

Your prompt

Help me plan idempotency keys for writes.
Write: [Write]
Caller: [Caller]
Store: [Store]
Steps: 1. Read which operations must be safe to retry and which side effects they trigger. 2. Define key scope, format and who mints the key. 3. Set TTL, storage and what a replay returns. 4. Cover timeouts, partial failures and cross-service handoffs. 5. Name dashboards for replay rate and conflict. 6. Write tests that force double delivery.
Output: key rule, store design, replay behaviour, dashboards and tests.

Take particular care to reuse one key per logical write and return the original result on replay.

Before you answer, check: Are all instructions met? If key information is missing or a placeholder in square brackets is still in the text, ask instead of guessing. Mark assumptions as assumptions.

This is an instruction for an AI, not the result itself.

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How to use it

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Copy the finished prompt into an AI tool of your choice.
Paste the write path and current retry behaviour, without secrets or live payloads.

Why does this work?

A new key on every retry is not idempotency. The same logical write must reuse one key until it settles.

Tips

Return the original result on replay; do not start a second side effect.

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Plan idempotency keys for writes

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