This skill should be used when the user needs to "estimate QPS", "back-of-the-envelope" (BOTEC) numbers, "how much storage / bandwidth", "how many servers", "peak load", "capacity planning", or wants the standard latency / throughput / availability numbers to ground a design (latency table, QPS rates, powers of two, nines). Use it whenever a design decision hinges on scale — convert any "high traffic" / "huge data" phrase into concrete numbers before choosing components, even if the user doesn't say "estimate".
How to install back-of-the-envelope?
proyecto26/system-design-skills/back-of-the-envelope
$npx -y skills add proyecto26/system-design-skills --skill back-of-the-envelopeInstalls into the current project.
›Prefer a prompt? Paste this to your agent
Run `npx skills use "https://github.com/proyecto26/system-design-skills" --skill "proyecto26/system-design-skills/back-of-the-envelope"` and follow the generated skill instructions now. Read its complete output, redirecting it to a temporary file first if necessary. Resolve relative paths from the supporting-files directory it provides.
Use the skills in "https://github.com/proyecto26/system-design-skills" that are relevant to the current task. Run `npx skills add "https://github.com/proyecto26/system-design-skills"` and select the relevant skills, then follow their instructions.
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