principle-explain-the-number from theonlyfusioncube/potetos-for-everyone is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
Apply before you trust, report, or act on a number you measured: a speedup, a regression, a throughput, a latency, or an eval result. Find what limits it, and rule out that it measured something other than the work you think.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
> Portable adaptation of Lauren Tan's pstack v0.15.30. Use available host capabilities and the fallbacks in PORTABILITY.md; do not claim unavailable tools, subagents, or runtime evidence.
# Explain the Number
- **Ask "why not double?"** Name the resource or code path that bounds the result, such as a core, a lock, the disk, the network, or the load generator itself. Get it from a profile or from system counters taken during a run, then map it to source. A guess from reading the code is not a limiter. If you cannot say why the number is not twice as good, you do not know what you measured.
- **List what else the number could be measuring, and rule out each one with evidence.** The usual suspects are errors, skipped or cached work, code that never ran, an untuned side (one left on default settings), noise, and a piece too small to matter end to end.
- **Keep the evidence with the number.** Put the run count, the spread, and the limiter in the notes or a linked artifact.
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The line at the top of this page pins the label git:20261023.9aa1985, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
GET https://markdownregistry.com/api/v1/artifacts/art_ylujf2qifnrqc4rf
GET https://markdownregistry.com/api/v1/resolve?ref=theonlyfusioncube/potetos-for-everyone/principle-explain-the-number
GET https://markdownregistry.com/api/v1/blob/19298b73c8f0460205563a9b44f196182fb1e931fde6aa649dfec051f545fa8f
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
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cursor/plugins · pstack/skills/principle-explain-the-number/SKILL.md · Apply before you measure, and before you trust, report, or act on a number you measured: a speedup, a regression, a…
nightly-labs/openbot · marketplace/production-catalog/bundles/pstack/skills/principle-explain-the-number/SKILL.md · Apply before you trust, report, or act on a number you measured: a speedup, a regression, a throughput, a latency, or…
michael-denyer/pstack-claude · plugins/pstack/skills/principle-explain-the-number/SKILL.md · Apply before you measure, and before you trust, report, or act on a number you measured: a speedup, a regression, a…
backnotprop/pstack · skills/principle-explain-the-number/SKILL.md · Apply before you measure, and before you trust, report, or act on a number you measured: a speedup, a regression, a…
creedants/pstack-t3 · skills/principle-explain-the-number/SKILL.md · Apply before you measure, and before you trust, report, or act on a number you measured: a speedup, a regression, a…
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painhardcore/pstack · .opencode/skills/principle-explain-the-number/SKILL.md · Apply before you measure, and before you trust, report, or act on a number you measured: a speedup, a regression, a…
