code996 is a Node.js/TypeScript CLI tool that analyzes Git commit timestamp distributions to quantify work intensity and overtime patterns, producing a '996 index' score (named after the Chinese 9am-9pm-6day work schedule). It runs entirely locally via `git log`, collecting commit times, contributors, and timezones, then applies percentile-based algorithms to detect work start/end hours, compute overtime ratios (weekday/weekend/late-night), classify projects as corporate vs. open-source, detect cross-timezone teams, and adjust for Chinese holidays/makeup workdays. Output is rendered as a terminal report, offline Vue 3 web report (chart.xkcd visualizations, file:// compatible), JSON, or Markdown, with full zh-CN/en i18n. The tool explicitly targets job seekers and new team members to verify work-life balance claims against real commit data, and includes a disclaimer about accuracy limits (meetings, debugging, and non-coding work are invisible to git).