#!/usr/bin/env node
// 诊断 evolution-log line 55-58 实际内容
const fs = require('fs');
const lines = fs.readFileSync(__dirname + '/../../evolution-log.jsonl', 'utf8').split('\n');
for (const n of [54, 55, 56, 57, 58, 59]) {
  const line = lines[n - 1] || '';
  console.log(`--- line ${n} (length=${line.length}) ---`);
  try {
    JSON.parse(line);
    console.log('  PARSE OK');
  } catch (e) {
    console.log('  PARSE FAIL: ' + e.message);
  }
  console.log('  head: ' + JSON.stringify(line.slice(0, 80)));
  console.log('  tail: ' + JSON.stringify(line.slice(-80)));
  // 找 }{ 边界
  const idx = line.indexOf('}{');
  if (idx >= 0) console.log('  has }{ at idx=' + idx);
}