# Scale Game

> Test at extremes (1000x bigger/smaller, instant/year-long) to expose fundamental truths hidden at normal scales. Use when uncertain about scalability, edge cases unclear, or validating architecture for production volumes.

- Skill: `majiayu000/scale-game` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds add majiayu000/scale-game`
- Raw SKILL.md: https://api.skillmd.com/api/skills/majiayu000/scale-game/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: majiayu000 (https://skillmd.com/u/majiayu000)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/majiayu000/scale-game

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# Scale Game

## Overview

Test your approach at extreme scales to find what breaks and what surprisingly survives.

**Core principle:** Extremes expose fundamental truths hidden at normal scales.

## Quick Reference

| Scale Dimension | Test At Extremes | What It Reveals |
|-----------------|------------------|-----------------|
| Volume | 1 item vs 1B items | Algorithmic complexity limits |
| Speed | Instant vs 1 year | Async requirements, caching needs |
| Users | 1 user vs 1B users | Concurrency issues, resource limits |
| Duration | Milliseconds vs years | Memory leaks, state growth |
| Failure rate | Never fails vs always fails | Error handling adequacy |

## Process

1. **Pick dimension** - What could vary extremely?
2. **Test minimum** - What if this was 1000x smaller/faster/fewer?
3. **Test maximum** - What if this was 1000x bigger/slower/more?
4. **Note what breaks** - Where do limits appear?
5. **Note what survives** - What's fundamentally sound?

## Examples

### Example 1: Error Handling
**Normal scale:** "Handle errors when they occur" works fine
**At 1B scale:** Error volume overwhelms logging, crashes system
**Reveals:** Need to make errors impossible (type systems) or expect them (chaos engineering)

### Example 2: Synchronous APIs
**Normal scale:** Direct function calls work
**At global scale:** Network latency makes synchronous calls unusable
**Reveals:** Async/messaging becomes survival requirement, not optimization

### Example 3: In-Memory State
**Normal duration:** Works for hours/days
**At years:** Memory grows unbounded, eventual crash
**Reveals:** Need persistence or periodic cleanup, can't rely on memory

## Red Flags You Need This

- "It works in dev" (but will it work in production?)
- No idea where limits are
- "Should scale fine" (without testing)
- Surprised by production behavior

## Remember

- Extremes reveal fundamentals
- What works at one scale fails at another
- Test both directions (bigger AND smaller)
- Use insights to validate architecture early