Cloudflare Developer Platform breaking changes

The 3 releases whose own notes call out a breaking change, out of 257 the archive holds. Scattered one per release page, this is a run nobody can see; gathered, it is the shape of how often Cloudflare Developer Platform asks you to change your code.

Tagged breaking: 3 of 257 releases
Roughly: 1 in 86 releases held here
Most recent: 22 Oct 2026 yesterday
Across: 44 days back to 8 Sep 2026

How this is decided

A release appears here because the word breaking is in the notes its publisher wrote, not because anyone here read the diff. That cuts both ways. A release that changed an API without using the word is missing from this page, and a release that used the word about something minor is on it. It is the publisher’s own signal, reported rather than judged, which is the same rule the security page follows.

Newest first

All Cloudflare Developer Platform releases

Agents - Agents SDK now supports the latest Pi 1.4 releasebreakingadded22 Oct 2026

Agents SDK v0.30.0 runs PiHarness on Pi 1.4 ↗︎, and makes it recover more reliably from evictions, crashes, and storage errors. Hibernation while Pi's tasks sleep. PiHarness passes Pi's new onWake callback to your harness factory. While a t

Agents, Workers - Think agents now use a @cloudflare/computer workspacebreakingaddeddeprecated20 Oct 2026

Think and Agent Skills now use the workspace from @cloudflare/computer ↗︎ as well as the filesystem tools. A JavaScript execution environment can be configured by adding the WorkerJavaScriptBackend. @cloudflare/shell is deprecated, and so i

Workers - Miniflare v5 prepares local development for the cf CLIbreakingaddeddeprecated8 Sep 2026

Miniflare v5 prepares Cloudflare local development tooling for the upcoming cf CLI. Miniflare powers local Workers development behind wrangler dev, the Cloudflare Vite plugin, and @cloudflare/vitest-plugin. Most projects should use those to