Claude Code’s Creator: “Delete Your CLAUDE.md” — 7 Moments That Matter (Boris Cherny at YC)

The engineer who created Claude Code — Boris Cherny — sat down at Y Combinator one day after Opus 5 shipped and told a room of founders to DELETE their CLAUDE.md files. Then he explained how his own team deleted 80% of Claude Code's system prompt, shared the exact 3-sentence prompt that had been running for two straight weeks, and revealed the routines that let Claude maintain its own codebase. We pulled the 7 moments that actually change how you build — and fact-checked the wildest claims against primary sources. ⏱️ TIP: This video is information-dense — watch at 1.25x if we talk too slow for you. FREE PDF — THE DELETE PROTOCOL Every quote timestamped to the full talk, the delete-and-rebuild checklist, the 2-week prompt template, the full routine list to copy, and the fact-check with sources. Comment the word DELETE and our assistant will send it over, or grab it here: https://hyperautomationlabs.co/free/d... CHAPTERS 0:00 The creator of Claude Code says: delete 0:48 Who is Boris Cherny 1:16 Moment 1 — They deleted 80% of their own system prompt 3:41 Moment 2 — Delete your CLAUDE.md every 6 months 5:10 Moment 3 — Product overhang: the birth story of Claude Code 7:07 Moment 4 — The 11-day Bun rewrite (Zig to Rust) 9:00 Fact-check — the receipts, all public 10:18 Moment 5 — The 2-week prompt (steal this) 13:06 Moment 6 — Claude maintains its own codebase 15:36 Moment 7 — The empirical mindset + the TI-83 receipt 17:40 The 7 moments in 40 seconds 18:22 Free PDF: The Delete Protocol (comment DELETE) FULL TALK (worth every minute — credit where it's due) "Boris Cherny: Building Claude Code" — Y Combinator, with YC General Partner Diana Hu, Startup School 2026:    • Boris Cherny: Building Claude Code   All interview clips in this video are from the official Y Combinator upload, credited on screen throughout. This is an independent builder's-cut commentary — not affiliated with Anthropic or Y Combinator. RECEIPTS FROM THE FACT-CHECK The Bun rewrite, official engineering post: https://bun.com/blog/bun-in-rust Anthropic acquires Bun: https://www.anthropic.com/news/anthro... ARC Prize — Opus 5 results: https://arcprize.org/results/anthropi... Boris's 2004 TI-83 guide, still live: https://www.ticalc.org/programming/co... JUST GETTING STARTED? MY BEGINNER GUIDES (step by step, from zero) The Complete Claude Code Guide ($14.97): https://hyperautomationlabs.gumroad.c... The OpenAI Codex Guide ($9.97): https://hyperautomationlabs.gumroad.c... Claude Cowork Sales Guide ($14.97): https://hyperautomationlabs.gumroad.c... Claude Certified Architect Prep Kit ($29): https://hyperautomationlabs.gumroad.c... SUPPORT THE CHANNEL YouTube: become a Member — or just subscribe, it's free and it tells the algorithm. Facebook: hit Subscribe (the Supporter button) — that's what keeps the lights on. Instagram: @hyperautomationlabs — follow for daily clips. Same name everywhere: Hyperautomation Labs. #ClaudeCode #BorisCherny #Anthropic #YCombinator #AIAgents #Opus5 #AIcoding #ClaudeAI