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YC's Garry Tan Touts Capy After One-PR Bug-Fix Spree

YC President Garry Tan showcased fixing 28 bugs in a single PR with AI coding tool Capy, then followed up praising its cross-session collaboration capabilities as an unexpectedly pleasant surprise.

2026-09-29 ~ 2026-10-03 · 2 episodes · 7 posts

Episode 1 · YC President Garry Tan Fixes 28 Bugs in One PR with Capy AI Agents (2026-09-29, 5 posts)

Y Combinator President Garry Tan posted in late September and early October about a "fix wave" he completed with AI coding tool Capy: multiple coding agents worked together to fix 28 bugs in his personal project gbrain in a single PR, an experience he described as excellent. The case drew attention as a hands-on test of AI coding agents by a prominent tech executive acting as a working developer.

Confirmed

  • Using Capy's fix wave workflow, Garry Tan bundled fixes for 28 bugs in the gbrain project into one PR and praised the overall experience.
  • He emphasized that Capy natively supports coordination across multiple PRs and threads: simply instructing agents verbally to coordinate and avoid conflicting on the same code paths causes the system to automatically inject inter-agent conversation, with no extra orchestration layer required.
  • He said the clean handoffs and seamless relay between agents surprised him most.

Why it matters

  • This is a public endorsement of AI coding agents by the head of a top incubator acting as a real developer, demonstrating multi-agent collaboration on bulk-fix tasks.
  • If native agent coordination without an orchestration layer holds up, it significantly lowers the barrier to multi-agent workflows and signals a direction for coding AI tooling.

Episode 2 · YC's Garry Tan Praises Capy's Cross-Session AI Agent Coordination (2026-10-03, 2 posts)

Y Combinator CEO Garry Tan shared a surprising experience with AI coding tool Capy, whose cross-session agents automatically avoided code he was editing. He dubbed the coordination "a 24/7 standup meeting for agents."