Function buildL3BuildPrompt

scripts/context-execution-benchmark.mjs:1337–1361

* L3 Build Phase: Claude reads compressed handoff context → implements → tests. * Returns { usage, attempts, testResult, completed, durationMs, costUsd }.

(mode, contextFile, contextText, tier)

 * Returns { usage, attempts, testResult, completed, durationMs, costUsd }.
 */
function buildL3BuildPrompt(mode, contextFile, contextText, tier) {
  const testCount = l3TestCountFor(tier);
  return [
    'You are implementing a dictionary module based on a Design Doc and spec.',
    `Mode: ${mode} | Context source: ${contextFile}`,
    '',
    'Read the handoff context below. It contains the Design Doc and spec acceptance criteria.',
    '',
    'TASK:',
    '1. Implement src/dictionary.js that exports a Dictionary class with methods:',
    '   - add(word, definition, category?) — add or overwrite a word entry',
    '   - getDefinition(word) — return full entry object or undefined (case-sensitive)',
    '   - lookup(word) — return definition string or undefined (case-insensitive)',
    '   - getByCategory(category) — return array of entries matching category',
    '   - list(options?) — return all entries sorted by word; options.excludeDeprecated filters out deprecated',
    '   - deprecate(word) — set deprecated=true; throws "word not found: <word>" if not found',
    '   - exists(word) — return boolean (case-insensitive)',
    '2. Do NOT modify tests/dictionary.test.js',
    `3. Run \`npx vitest run\` to verify. Fix failures until all ${testCount} tests pass.`,
    '',
    '<comet_handoff_context>',
    contextText,
    '</comet_handoff_context>',
  ].join('\n');
}

async function runL3Build({ claudeCommand, model, cwd, mode, contextFile, contextText, tier, maxRetries }) {
  const basePrompt = buildL3BuildPrompt(mode, contextFile, contextText, tier);