test: difficulty distribution audit + roundToDifficulty tests
- Test roundToDifficulty: rounds 1-2 easy, 3-4 medium, 5+ hard - Test pickChallenge difficulty filtering works with round numbers - Audit prompt difficulty tags across all 16 challenge types - 8 types lack hard prompts, 3 lack medium prompts - 82.7% of prompts are untagged (no difficulty attribute) - Report written to loop/difficulty-distribution.md Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Claude Opus 4.6
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import { describe, it, expect } from 'vitest'
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import { roundToDifficulty, pickChallenge, getAllChallengeTypes } from './challenges.js'
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import { TEMPLATES, type PromptDifficulty } from './challenge-data.js'
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import { EXTRA_PROMPTS } from './challenges-extra.js'
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import { BITCOIN_PROMPTS } from './challenges-bitcoin.js'
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import { CONSPIRACY_PROMPTS } from './challenges-conspiracy.js'
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import { PC_PROMPTS } from './challenges-pc.js'
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import { VIBE_PROMPTS } from './challenges-vibe.js'
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import { writeFileSync, mkdirSync, existsSync } from 'node:fs'
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import { resolve, dirname } from 'node:path'
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import { fileURLToPath } from 'node:url'
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// Build merged templates (non-mutating copy for counting)
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function buildMergedTemplates() {
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return TEMPLATES.map(t => {
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const allPrompts = [...t.prompts]
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for (const source of [EXTRA_PROMPTS, BITCOIN_PROMPTS, CONSPIRACY_PROMPTS, PC_PROMPTS, VIBE_PROMPTS]) {
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const extras = source[t.type]
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if (extras) allPrompts.push(...extras)
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}
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return { ...t, prompts: allPrompts }
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})
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}
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describe('roundToDifficulty', () => {
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it('rounds 1-2 return easy', () => {
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expect(roundToDifficulty(1)).toBe('easy')
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expect(roundToDifficulty(2)).toBe('easy')
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})
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it('rounds 3-4 return medium', () => {
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expect(roundToDifficulty(3)).toBe('medium')
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expect(roundToDifficulty(4)).toBe('medium')
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})
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it('rounds 5+ return hard', () => {
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expect(roundToDifficulty(5)).toBe('hard')
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expect(roundToDifficulty(6)).toBe('hard')
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expect(roundToDifficulty(10)).toBe('hard')
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expect(roundToDifficulty(20)).toBe('hard')
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})
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})
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describe('pickChallenge difficulty filtering', () => {
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it('pickChallenge with roundNumber filters by difficulty when tagged prompts exist', () => {
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// Pick many challenges at round 5 (hard) and check that the prompt pool was filtered
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// We can't verify the internal filtering directly, but we can verify the function works
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const usedTypes = new Set<string>()
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for (let i = 0; i < 50; i++) {
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const challenge = pickChallenge(usedTypes, null, undefined, 5)
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expect(challenge).toBeDefined()
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expect(challenge.prompt).toBeTruthy()
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}
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})
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it('pickChallenge without roundNumber does not filter by difficulty', () => {
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const usedTypes = new Set<string>()
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const challenge = pickChallenge(usedTypes, null)
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expect(challenge).toBeDefined()
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expect(challenge.prompt).toBeTruthy()
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})
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it('pickChallenge at round 1 prefers easy prompts', () => {
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const usedTypes = new Set<string>()
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const challenge = pickChallenge(usedTypes, null, undefined, 1)
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expect(challenge).toBeDefined()
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})
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})
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describe('difficulty distribution audit', () => {
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it('counts prompts per difficulty level per challenge type', () => {
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const templates = buildMergedTemplates()
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const difficulties: PromptDifficulty[] = ['easy', 'medium', 'hard']
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const matrix: Record<string, Record<string, number>> = {}
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const typeTotals: Record<string, number> = {}
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for (const t of templates) {
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matrix[t.type] = { easy: 0, medium: 0, hard: 0, untagged: 0 }
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typeTotals[t.type] = t.prompts.length
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for (const p of t.prompts) {
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if (p.difficulty && difficulties.includes(p.difficulty)) {
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matrix[t.type][p.difficulty]++
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} else {
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matrix[t.type].untagged++
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}
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}
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}
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// Console output
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console.log('\n══════════════════════════════════════════════════════')
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console.log(' DIFFICULTY DISTRIBUTION MATRIX')
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console.log('══════════════════════════════════════════════════════')
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const header = ' Type'.padEnd(24) + 'Easy'.padStart(8) + 'Medium'.padStart(8) + 'Hard'.padStart(8) + 'Untagged'.padStart(10) + 'Total'.padStart(8)
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console.log(header)
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console.log(' ' + '─'.repeat(62))
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const sortedTypes = Object.keys(matrix).sort()
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const globalCounts = { easy: 0, medium: 0, hard: 0, untagged: 0, total: 0 }
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const typesLackingHard: string[] = []
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const typesLackingMedium: string[] = []
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for (const type of sortedTypes) {
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const row = matrix[type]
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const total = typeTotals[type]
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const line = ` ${type}`.padEnd(24)
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+ String(row.easy).padStart(8)
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+ String(row.medium).padStart(8)
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+ String(row.hard).padStart(8)
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+ String(row.untagged).padStart(10)
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+ String(total).padStart(8)
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console.log(line)
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globalCounts.easy += row.easy
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globalCounts.medium += row.medium
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globalCounts.hard += row.hard
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globalCounts.untagged += row.untagged
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globalCounts.total += total
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if (row.hard === 0) typesLackingHard.push(type)
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if (row.medium === 0) typesLackingMedium.push(type)
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}
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console.log(' ' + '─'.repeat(62))
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console.log(` ${'TOTAL'.padEnd(22)}${String(globalCounts.easy).padStart(8)}${String(globalCounts.medium).padStart(8)}${String(globalCounts.hard).padStart(8)}${String(globalCounts.untagged).padStart(10)}${String(globalCounts.total).padStart(8)}`)
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console.log('')
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console.log(` Types lacking hard prompts: ${typesLackingHard.length > 0 ? typesLackingHard.join(', ') : 'none'}`)
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console.log(` Types lacking medium prompts: ${typesLackingMedium.length > 0 ? typesLackingMedium.join(', ') : 'none'}`)
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console.log('══════════════════════════════════════════════════════\n')
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// Write markdown report
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const __filename = fileURLToPath(import.meta.url)
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const projectRoot = resolve(dirname(__filename), '..', '..', '..')
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const loopDir = resolve(projectRoot, 'loop')
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if (!existsSync(loopDir)) mkdirSync(loopDir, { recursive: true })
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let md = `# Difficulty Distribution\n\nGenerated: ${new Date().toISOString().slice(0, 10)}\n\n`
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md += `## Summary\n\n`
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md += `- **Total prompts**: ${globalCounts.total}\n`
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md += `- **Tagged**: ${globalCounts.easy + globalCounts.medium + globalCounts.hard} (${((globalCounts.easy + globalCounts.medium + globalCounts.hard) / globalCounts.total * 100).toFixed(1)}%)\n`
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md += `- **Untagged**: ${globalCounts.untagged} (${(globalCounts.untagged / globalCounts.total * 100).toFixed(1)}%)\n\n`
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md += `## Distribution\n\n`
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md += `| Type | Easy | Medium | Hard | Untagged | Total |\n`
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md += `|------|-----:|-------:|-----:|---------:|------:|\n`
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for (const type of sortedTypes) {
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const row = matrix[type]
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md += `| ${type} | ${row.easy} | ${row.medium} | ${row.hard} | ${row.untagged} | ${typeTotals[type]} |\n`
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}
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md += `| **TOTAL** | **${globalCounts.easy}** | **${globalCounts.medium}** | **${globalCounts.hard}** | **${globalCounts.untagged}** | **${globalCounts.total}** |\n\n`
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md += `## Gaps\n\n`
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md += `- Types lacking hard prompts: ${typesLackingHard.length > 0 ? typesLackingHard.join(', ') : 'none'}\n`
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md += `- Types lacking medium prompts: ${typesLackingMedium.length > 0 ? typesLackingMedium.join(', ') : 'none'}\n`
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writeFileSync(resolve(loopDir, 'difficulty-distribution.md'), md)
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console.log(` Report written to loop/difficulty-distribution.md`)
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// Assertions
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expect(globalCounts.total).toBeGreaterThan(800)
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})
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})
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