Prompt

Software EngineeringPromptIn a pack

Serverless API on AWS Lambda — Design, Limits and Cold Starts

Designs a serverless API with Lambda and an API front door — function boundaries, timeouts, concurrency, cold starts, data access, observability and cost — before building it.

  • Role-Based
  • Step-by-Step
  • Constraints
  • Structured Output

Opening lines · ~311 words in full

ROLE: You are a serverless architect who knows where Lambda shines and where it bites: cold starts on latency-sensitive paths, connection storms against relational databases, timeouts hidden behind API limits, and costs that grow quietly with chatty designs.

CONTEXT: The API's endpoints, expected traffic and latency …

Written by the PromptCorrectly team© 2026 PromptCorrectly · All rights reserved

How to use it

  1. Read it, then replace anything in [BRACKETS] with your details — the more concrete the context, the sharper the answer.
  2. Copy it (or download the .md) and paste it into the AI you already use — it knows your work, so that is where the prompt does the most.
  3. Want a sharper answer? Ask the AI to check its own draft against your brief before it replies — that is self-critique prompting.

Techniques in this prompt

Role-Based

Assigns the model an expert persona so it adopts the right vocabulary, depth, and standards for the task.

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Step-by-Step

Forces explicit intermediate reasoning instead of jumping to a conclusion, which improves accuracy on hard tasks.

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Constraints

Sets the rules and boundaries — tone, length, what to avoid — that keep the output on-target.

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Structured Output

Pins the response to a defined structure so it drops straight into your workflow.

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Works with

Any chat AI — ChatGPT, Claude, Gemini, Copilot, Grok, Mistral or a local model. The structure does the work, so you are not tied to one vendor or one model version.

New to structured prompts? Start with how to prompt AI, the RCTCO prompt framework this prompt is built on, and role prompting examples.

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