SKILL.md
AWS Serverless
Overview
This skill is the router for serverless work on AWS. It makes one opinionated recommendation for each application component and each raised decision dimension (form factor + capacity provider + orchestration + feature choices), then hands off to every specialized skill needed for that composition. Do not force a multi-component application onto one form factor. This skill keeps only the shared Lambda reference material that has no dedicated skill.
Works best with the AWS MCP server — recommended for sandboxed command execution and audit logging. All guidance also works with standard AWS CLI access.
How to use this skill: Step 0 fixes the entry point (new, optimizing, migrating); Step 1 routes components that already name the technology; Step 2 walks the compute decision flow (Tier 1 → 3) for each component until its form factor and capacity provider are locked, with the Tier 4 edge cases detailed in compute-decision-edge-cases.md; Steps 3–5 resolve orchestration, eventing and the HTTP front door only when the request raises them, with the full comparisons in orchestration.md and api-gateway.md. Then hand off to every applicable specialized skill and fall back to the shared references for anything without a dedicated skill.
If a routed skill is not available in your environment, the decision made here still stands: answer from the decision flow below and the shared references, name the recommended form factor and the skill that owns it, and do not switch to a different form factor because its documentation is easier to find. In particular, Lambda Web Adapter is not a substitute for Web Functions on a Node.js HTTP app — it is the Event Functions path for non-Node.js runtimes, container images, or an existing API Gateway integration.