Bun Runtime Development Guide

This skill is intentionally grounded in official Bun documentation. Bun moves quickly, so prefer current docs over hard-coded release timelines or benchmark claims.

Recent Capability Radar

Bun ships new built-ins constantly. This list covers what landed roughly between Bun 1.3 (Oct 2025) and Bun 1.3.14 (May 2026) — the kind of thing a model's training data likely predates. For anything newer, check https://bun.com/blog before assuming a capability doesn't exist.

Reach for these instead of the dependency you'd otherwise install: