# Bun bun-v1.0.0 — Release & Upgrade Intelligence
- **Product:** Bun (https://bun.sh)
- **Version:** bun-v1.0.0
- **Released:** Sep 08, 2023
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/bun/updates/bun-v1.0.0/

## Executive Summary (TL;DR)
Bun bun-v1.0.0. Source highlight: Today is an exciting day.

## New Features
- feat(node:dns): implement `dns.reverse`.
- add unix socket support for `node:http.server`
- add life cycle scripts to lockfile metahash
- feat(node:fs): add `cp`/`cpSync`/`promises.cp` + async `copyFile`
- feat(runtime): Implement `fs.watchFile`
- feat(fetch) rejectUnauthorized and checkServerIdentity

## Bug Fixes
- Fix assertion failure with sourcemaps in multi-threaded transpiler
- Fix the crash when importing a module that does not exist.
- More improvements to debugger support
- Fix some edge cases in the `env` param of `spawn`.
- fix #4356
- Fix close callback and open event for fs streams