# What changed in workerd

> 10 changes in workerd 1 from its official release notes, upgrade guides and advisories: 1 new APIs and options. Each one cited. Sources checked 2026-10-18. HTML: https://unstale.sh/npm/workerd/

To see which of these apply to a repository, run `npx @unstale/cli init` in it.

## workerd 1

### New APIs and options

- The retry policy can be set per Durable Object stub. (1.20261017.1) — [release notes](https://github.com/cloudflare/workerd/releases/tag/v1.20261017.1)

### Behavior and default changes

- Actor RPC exceptions are held behind the actor's output gate. (1.20261017.1) — [release notes](https://github.com/cloudflare/workerd/releases/tag/v1.20261017.1)
- Pull is deferred to a batch's last chunk on the auto-allocate path. (1.20261017.1) — [release notes](https://github.com/cloudflare/workerd/releases/tag/v1.20261017.1)
- Pyodide's compiled Wasm module is kept alive across isolates. (1.20261016.1) — [release notes](https://github.com/cloudflare/workerd/releases/tag/v1.20261016.1)

### Fixes and other changes

- A byte source's expectedLength is treated as an exact total. (1.20261017.1) — [release notes](https://github.com/cloudflare/workerd/releases/tag/v1.20261017.1)
- A transient marker is added for Durable Object call failures. (1.20261017.1) — [release notes](https://github.com/cloudflare/workerd/releases/tag/v1.20261017.1)
- A queued ReadableStream's source is released once its algorithms clear. (1.20261017.1) — [release notes](https://github.com/cloudflare/workerd/releases/tag/v1.20261017.1)
- Stream constructors now read source, sink, and transformer members according to pinned behavior. (1.20261017.1) — [release notes](https://github.com/cloudflare/workerd/releases/tag/v1.20261017.1)
- Exceptions in actors are reported for the right request. (1.20261016.1) — [release notes](https://github.com/cloudflare/workerd/releases/tag/v1.20261016.1)
- EOF bookkeeping now accounts for pumped bytes in RPC streams. (1.20261016.1) — [release notes](https://github.com/cloudflare/workerd/releases/tag/v1.20261016.1)