cloudflare/workers-sdk miniflare@4.20260616.0

miniflare@4.20260616.0

Repository: cloudflare/workers-sdk

Tag: miniflare@4.20260616.0

Published: 2026-06-16T15:36:54Z

Prerelease: no

Release notes:

Minor Changes

• #14221 `0e055d3` Thanks @mglewis! - Support cf.image (transform via Workers) image transformations in local dev

fetch(url, { cf: { image: { ... } } }) now transforms images locally via Sharp, instead of returning the original bytes unchanged. This mirrors the production "transform via Workers" feature, so Workers already using cf.image behave much more closely to production in wrangler dev.

As with the Images binding, cf.image transforms require Sharp to be installed — transforms are silently skipped if Sharp is unavailable.

Patch Changes

• #14271 `27db82c` Thanks @dependabot! - Update dependencies of "miniflare", "wrangler"

The following dependency versions have been updated:

| Dependency | From | To | | ---------- | ------------ | ------------ | | workerd | 1.20260611.1 | 1.20260612.1 |

• #14298 `2a6a26b` Thanks @dependabot! - Update dependencies of "miniflare", "wrangler"

The following dependency versions have been updated:

| Dependency | From | To | | ---------- | ------------ | ------------ | | workerd | 1.20260612.1 | 1.20260615.1 |

• #14317 `9a424ed` Thanks @dependabot! - Update dependencies of "miniflare", "wrangler"

The following dependency versions have been updated:

| Dependency | From | To | | ---------- | ------------ | ------------ | | workerd | 1.20260615.1 | 1.20260616.1 |

• #14287 `41f391f` Thanks @edmundhung! - Improve errors for missing resource bindings

When methods like getKVNamespace() or getR2Bucket() are called with a binding name that is not configured for that resource type, Miniflare now reports the expected binding type in the error message.