# Next.js v16.5.0-canary.40 — Release & Upgrade Intelligence
- **Product:** Next.js (https://nextjs.org)
- **Version:** v16.5.0-canary.40
- **Released:** Nov 03, 2026
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/nextjs/updates/v16.5.0-canary.40/

## Executive Summary (TL;DR)
Next.js v16.5.0-canary.40. Source highlight: Add instrumentationInject for adapter-supplied instrumentation: #100658

## New Features
- Add instrumentationInject for adapter-supplied instrumentation: #100658

## Improvements
- perf(build): use nft's cached readlink when collecting build traces: #99678

## Bug Fixes
- test(codemod): fix flaky agents-md e2e cascade on slow GitHub clones: #101122
- turbo-tasks-backend: fix lost idle wakeup in the snapshot loop: #100290