--- title: "@cloudflare/workers-types (npm) Breaking Changes | Since.dev" description: "What each @cloudflare/workers-types release removed, renamed or changed: 51 breaking changes in 1 version on npm, each with its source." canonical_url: https://since.dev/packages/npm/@cloudflare/workers-types last_updated: 2026-07-03 --- # @cloudflare/workers-types breaking changes Every breaking API change we have recorded in @cloudflare/workers-types on npm: 51 breaking changes in 1 version. Below are its newest version, removals and renames first, each with its source. Newest change July 3, 2026 ## 5.20260703.1 51 breaking changes, first published July 3, 2026. - **Removed** `FetcherPutOptions` FetcherPutOptions was removed in @cloudflare/workers-types 5.20260703.1 [npmjs.com](https://www.npmjs.com/package/@cloudflare/workers-types/v/5.20260703.1) - **Signature changed** `AiTextToImageOutput.locked` Was readonly locked: boolean; now locked: boolean. [npmjs.com](https://www.npmjs.com/package/@cloudflare/workers-types/v/5.20260703.1) - **Signature changed** `BodyInit` Was type BodyInit = | ReadableStream | string | ArrayBuffer | ArrayBufferView | Blob | URLSearchParams | FormData; now type BodyInit = | ReadableStream | string | ArrayBuffer | ArrayBufferView | Blob |... [npmjs.com](https://www.npmjs.com/package/@cloudflare/workers-types/v/5.20260703.1) - **Signature changed** `CloudflareWorkersModule.WorkflowStep.do` Was do>(name: string, config: WorkflowStepConfig, callback: (ctx: WorkflowStepContext) => Promise, rollbackOptions?: WorkflowStepRollbackOptions): Promise; now do, const... [npmjs.com](https://www.npmjs.com/package/@cloudflare/workers-types/v/5.20260703.1) - **Signature changed** `CloudflareWorkersModule.WorkflowStepConfig` Was type WorkflowStepConfig = {retries?: {limit: number; delay: WorkflowDelayDuration | number; backoff?: WorkflowBackoff;}; timeout?: WorkflowTimeoutDuration | number; sensitive?: WorkflowStepSensitivity;}; now type WorkflowStepConfig =... [npmjs.com](https://www.npmjs.com/package/@cloudflare/workers-types/v/5.20260703.1) - **Signature changed** `CloudflareWorkersModule.WorkflowStepConfig.retries` Was retries?: {limit: number; delay: WorkflowDelayDuration | number; backoff?: WorkflowBackoff;}; now retries?: {limit: number; delay: WorkflowDelayDuration | number | WorkflowDelayFunction; backoff?: WorkflowBackoff;}. [npmjs.com](https://www.npmjs.com/package/@cloudflare/workers-types/v/5.20260703.1) - **Signature changed** `CloudflareWorkersModule.WorkflowStepConfig.retries.delay` Was delay: WorkflowDelayDuration | number; now delay: WorkflowDelayDuration | number | WorkflowDelayFunction. [npmjs.com](https://www.npmjs.com/package/@cloudflare/workers-types/v/5.20260703.1) - **Signature changed** `CloudflareWorkersModule.WorkflowStepContext` Was type WorkflowStepContext = {step: {name: string; count: number;}; attempt: number; config: WorkflowStepConfig;}; now type WorkflowStepContext = {step: {name: string; count: number;}; attempt... [npmjs.com](https://www.npmjs.com/package/@cloudflare/workers-types/v/5.20260703.1) - **Signature changed** `CloudflareWorkersModule.WorkflowStepContext.config` Was config: WorkflowStepConfig; now config: {retries?: {limit: number; backoff?: WorkflowBackoff;} & (Delay extends WorkflowDelayFunction ? {} : {delay: WorkflowDelayDuration | number;}); timeout?: WorkflowTimeoutDuration | number... [npmjs.com](https://www.npmjs.com/package/@cloudflare/workers-types/v/5.20260703.1) - **Signature changed** `CloudflareWorkersModule.WorkflowStepRollbackConfig.retries` Was retries?: {limit: number; delay: WorkflowDelayDuration | number; backoff?: WorkflowBackoff;}; now retries?: {limit: number; delay: WorkflowDelayDuration | number | WorkflowDelayFunction; backoff?: WorkflowBackoff;}. [npmjs.com](https://www.npmjs.com/package/@cloudflare/workers-types/v/5.20260703.1) And 41 more in this version. ## Check your code These are the changes. To see which of them reach your code, [scan a public repository](https://since.dev/scan.md), or have your coding agent call `check_code` with your manifest or lockfile over [MCP](https://since.dev/docs.md#mcp). [The API](https://since.dev/docs.md#api) reads every change in every version, not only the newest. On Team and up, a fix pull request opens for the changes that reach a connected repository. Nothing merges or deploys. ## Put your code on continuous management. Scan a public repository now, or give your agent one line. ### See how out of date your code is. [Scan a repository](https://since.dev/scan.md). Any public GitHub repository. No sign-in. ### Tell your agent what changed since it was trained. `claude mcp add --transport http since https://api.since.dev/mcp` --- Every page on this site as Markdown: https://since.dev/sitemap.md. For agents: https://since.dev/llms.txt.