Preview Environments for Pull Requests
Design short-lived environments per pull request.
Added October 15, 2026. Written with AI assistance and checked for clarity and placeholders; not reviewed by a lawyer, accountant, clinician or other professional. How these prompts are made
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Design preview environments created per pull request. Application architecture: [ARCHITECTURE]. Hosting platform: [HOSTING]. Data needs (seed data, third-party services): [DATA_NEEDS]. Budget limits: [BUDGET]. Describe the lifecycle: create on open, update on push, destroy on merge or after a time limit. Specify naming and URL rules, how to provision isolated data safely without using production data, how to handle secrets and third-party callbacks, and how to prevent cost runaway with quotas and automatic cleanup. Provide a comparison table of three implementation approaches (platform feature, namespaces in a shared cluster, full stacks) on cost, speed and isolation. Add a security section covering access control and exposure of preview URLs. Finish with a rollout plan beginning with the simplest approach. Add a cost model with formulas for the monthly cost of N concurrent previews, using placeholders for unit prices that I fill in, and a table showing three scenarios of 5, 20, and 50 open pull requests. Include a short list of things that must never be present in a preview environment (production credentials, real customer data, outbound email to real addresses) and how to enforce each.
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