https://zhenghaoxu.com/ 2026-10-18 https://zhenghaoxu.com/cv 2026-10-18 https://zhenghaoxu.com/blog 2026-10-18 https://zhenghaoxu.com/blog/better-homework-pdf 2026-10-18 https://zhenghaoxu.com/blog/building-cc-pipe-a-pipe-operator-for-claude-code-skills 2026-10-18 https://zhenghaoxu.com/blog/first-merged-open-source-pr 2026-10-18 https://zhenghaoxu.com/blog/pico-ssd1306-spi-first-contributor 2026-10-18 https://zhenghaoxu.com/blog/welcome-to-the-blog 2026-10-18