Prompt Optimizer

const DIMENSIONS = [
  { key: 'role', name: 'Role clarity', weight: 0.15,
    markers: [/act as/i, /you are/i, /you're a/i,
              /role/i, /pretend/i] },
  { key: 'task', name: 'Task specificity', weight: 0.30,
    markers: [/write/i, /create/i, /build/i, /generate/i,
              /analyze/i, /explain/i, /summarize/i,
              /compare/i, /fix/i, /convert/i, /extract/i] },
  { key: 'format', name: 'Format', weight: 0.20,
    markers: [/list/i, /bullet/i, /table/i, /json/i,
              /markdown/i, /steps/i, /numbered/i,
              /csv/i, /outline/i] },
  { key: 'examples', name: 'Examples', weight: 0.15,
    markers: [/for example/i, /e\.g\./i, /example/i,
              /sample/i, /like this/i, /such as/i] },
  { key: 'constraints', name: 'Constraints', weight: 0.15,
    markers: [/must not/i, /do not/i, /no more than/i,
              /at least/i, /must/i, /limit/i,
              /under/i, /avoid/i, /only/i] },
  { key: 'tone', name: 'Tone & audience', weight: 0.05,
    markers: [/beginner/i, /expert/i, /senior/i,
              /non-technical/i, /audience/i, /tone/i,
              /friendly/i, /professional/i] }
];

function scoreDim(dim, text) {
  const found = [];
  for (const re of dim.markers) {
    if (re.test(text)) found.push(re.source);
  }
  const hits = Math.min(found.length, 4);
  if (dim.key === 'task') {
    const imperative = ACTION_VERBS.some(v =>
      new RegExp('^' + v + '\\b', 'i').test(text.trim()));
    const vaguePenalty = countVague(text) > 3 ? 12 : 0;
    return Math.min(100, 22 + hits * 16
      + (imperative ? 14 : 0) - vaguePenalty);
  }
  if (hits === 0) return dim.key === 'tone' ? 20 : 15;
  return Math.min(100, 50 + hits * 14);
}

const VAGUE_WORDS = ['good', 'nice', 'stuff', 'things',
  'better', 'improve', 'some', 'many', 'various', 'etc',
  'soon', 'fast', 'quick', 'great', 'helpful', 'big',
  'small', 'a lot', 'really', 'very', 'important',
  'easy', 'simple', 'recent', 'current', 'properly'];

function countVague(text) {
  let n = 0;
  for (const w of VAGUE_WORDS) {
    const re = new RegExp('\\b' + w.replace(/\s+/g,
      '\\s+') + '\\b', 'gi');
    n += (text.match(re) || []).length;
  }
  return n;
}

function splitSentences(text) {
  return (text.match(/[^.!?]+[.!?]*/g) || [])
    .map(s => s.trim()).filter(Boolean);
}

const VAGUE_REPLACEMENTS = [
  [/\bgood\b/gi, 'high-quality'],
  [/\bnice\b/gi, 'polished'],
  [/\bstuff\b/gi, 'specific items'],
  [/\bthings\b/gi, 'specific items'],
  [/\bbetter\b/gi, 'improved'],
  [/\bimprove\b/gi, 'enhance'],
  [/\bsome\b/gi, 'specific'],
  [/\bmany\b/gi, 'numerous'],
  [/\bvarious\b/gi, 'diverse'],
  [/\betc\b/gi, 'and related details'],
  [/\bsoon\b/gi, 'by the deadline'],
  [/\bfast\b/gi, 'quickly'],
  [/\bquick\b/gi, 'rapid'],
  [/\bgreat\b/gi, 'excellent'],
  [/\bhelpful\b/gi, 'actionable'],
  [/\bbig\b/gi, 'large-scale'],
  [/\bsmall\b/gi, 'compact'],
  [/\ba lot\b/gi, 'substantial'],
  [/\breally\b/gi, ''],
  [/\bvery\b/gi, ''],
  [/\bimportant\b/gi, 'critical'],
  [/\beasy\b/gi, 'straightforward'],
  [/\bsimple\b/gi, 'concise'],
  [/\brecent\b/gi, 'latest'],
  [/\bcurrent\b/gi, 'up-to-date'],
  [/\bproperly\b/gi, 'correctly']
];

function rewritePrompt(raw) {
  const changes = [];
  let text = raw.trim();

  if (!ROLE_RE.test(text)) {
    text = 'Act as an expert assistant with deep\n' +
           '  knowledge of the subject.\n\n' + text;
    changes.push('Added a role sentence');
  }

  const v = replaceVague(text);
  if (v.count > 0) {
    text = v.text;
    changes.push('Replaced ' + v.count +
      ' vague word(s) with concrete alternatives');
  }

  const buckets = { role: [], task: [], context: [],
    requirements: [], format: [] };
  for (const s of splitSentences(text)) {
    if (ROLE_RE.test(s)) buckets.role.push(s);
    else if (CONSTRAINT_RE.test(s)) buckets.requirements.push(s);
    else if (FORMAT_RE.test(s)) buckets.format.push(s);
    else if (CONTEXT_RE.test(s)) buckets.context.push(s);
    else buckets.task.push(s);
  }

  if (buckets.requirements.length === 0) {
    buckets.requirements.push('Do not invent facts, data, or sources');
    buckets.requirements.push('Stay within the requested length and scope');
    changes.push('Added explicit constraints');
  }
  if (buckets.format.length === 0) {
    buckets.format.push('Use clear headings and short paragraphs');
    buckets.format.push('End with a one-paragraph summary');
    changes.push('Added an output-format section');
  }

  const parts = [];
  if (buckets.role.length) parts.push('## Role\n' + buckets.role.join(' '));
  if (buckets.task.length) parts.push('## Task\n' + buckets.task.join(' '));
  if (buckets.context.length) parts.push('## Context\n' + buckets.context.join(' '));
  parts.push('## Requirements\n- ' + buckets.requirements.join('\n- '));
  parts.push('## Output format\n- ' + buckets.format.join('\n- '));

  changes.push('Restructured into Role / Task / Context /' +
    ' Requirements / Output format');
  return { optimized: parts.join('\n\n'), changes };
}