Published July 8, 2026 ยท Added July 9, 2026

Rewriting Bun in Rust

Jarred Sumner explains why and how the Bun team rewrote the open-source JavaScript runtime from Zig to Rust, describing an agentic coding workflow with trial runs, adversarial review, and automation around the migration.

Jarred Sumner explains why and how the Bun team rewrote the open-source JavaScript runtime from Zig to Rust, describing an agentic coding workflow with trial runs, adversarial review, and automation around the migration.

Read the original story.

Source: Bun