cloudflare/workers-sdk miniflare@5.20260811.0-alpha

on GitHub

Minor Changes

• #15123 d0c976c Thanks @dependabot! - Add local support for WorkflowInstance.delete() and Workflow.deleteBatch()

  The updated @cloudflare/workers-types now requires delete() on workflow instances and deleteBatch() on the workflow binding. These methods are now implemented in the local workflows simulator so that local dev and tests match the production API.

• #15123 d0c976c Thanks @dependabot! - Detect Node.js compatibility from the compatibility date, now that nodejs_compat is enabled by default

  As of compatibility date 2026-08-04, workerd enables the nodejs_compat and nodejs_compat_v2 compatibility flags by default. Previously these tools only treated Node.js compatibility as enabled when one of those flags was listed explicitly, so a Worker on a compatibility date of 2026-08-04 or later without the flag would get Node.js APIs from the runtime but no Node.js polyfills from the bundler, and process.env could be substituted with an empty object at build time. They now resolve these flags the same way workerd does, and honour no_nodejs_compat to opt out.

  To keep Node.js compatibility switched off on a newer compatibility date, specify both no_nodejs_compat and no_nodejs_compat_v2, since each flag has its own default.

  @cloudflare/vitest-pool-workers needs nodejs_compat_v2 for its own test runner, so it continues to override a project that opts out of it. On a compatibility date that enables the flag anyway, it now drops the opt-out rather than adding the flag back, which workerd would reject — previously this stopped such a project from running any tests at all.

  wrangler types also no longer attributes its @types/node suggestion to "the nodejs_compat flag", which it can now make for Workers that do not set the flag at all.

Patch Changes

• #15123 d0c976c Thanks @dependabot! - Update dependencies of "miniflare", "wrangler"

  The following dependency versions have been updated:

  Dependency	From	To
  @cloudflare/workers-types	^5.20260804.1	^5.20260811.1
  workerd	1.20260804.1	1.20260811.1

• #15148 0b82b15 Thanks @jamesopstad! - Ignore a nodejs_compat compatibility flag that the compatibility date already enables

  workerd rejects a compatibility flag that its compatibility date enables by default, so a Worker configured with both a compatibility date of 2026-08-04 or later and nodejs_compat failed to start locally with "The compatibility flag nodejs_compat became the default as of 2026-08-04 so does not need to be specified anymore".

  The redundant nodejs_compat and nodejs_compat_v2 flags are now dropped when starting the runtime, which has no effect on the resulting Worker because the compatibility date enables both anyway. no_nodejs_compat and no_nodejs_compat_v2 still switch Node.js compatibility off, and a flag specified alongside its own opt-out is left alone so that workerd still reports those as contradictory.

• #15131 90dd5e5 Thanks @vicb! - Bump capnp-es to 0.0.15.

  Also re-generate the types for the latest .capnp files