Workers changelog

New registry becomes default for JavaScript Workers with compatibility date 2026-11-17 or laterDeprecation

Client disconnection events enabled by default for compatibility date 2026-11-17 or later

BYOIP destination subrequests now keep Workers context and original client signals

Code updates deferred by default, up to 300 seconds while waiting to hibernate

Assets can be served from a URL path prefix using assets.base_path

Builds and build logs retained for 90 days after the build finishes

Workflows can be restricted to eu, us or fedramp jurisdictions for running and storing data

v0.7.0 resumes interrupted runs after deploy or crash and pauses for approvals

Custom spans add spanContext(), setStatus() and updateName() methods from the OpenTelemetry span API

Images reject compromised eMudhra certificates and include patched Node.js, Bun and pip versions

npm version can be pinned with the packageManager field in package.json

Deploy commands upload source maps by default from Wrangler 4.150.0; opt out via config

Use @cloudflare/computer workspace; @cloudflare/shell and createExecuteTool deprecated, with no automatic data migrationDeprecation

Sends one-off Cron Trigger invocations to a Worker's scheduled() handler locally

Version 1.0.0-beta.16 adds cf docs search; command names now kebab-case

Forward action in HTTP policies runs Workers on permitted traffic, on all Zero Trust plansPreview

Default Node.js, Python, Ruby, Go, Bun, Yarn and package manager versions updated

Sends Workers Issues to subscribed MCP clients as MCP Events via webhook

Posts preview URLs to GitHub and GitLab within seconds, previously often minutes

Grace period for pending requests and connections raised from 30 seconds to 20 minutes

Experimental support for running OpenCode 2.0 in a Durable Object with Workers AIPreview

Accepts an options object to create up to 100 instances by count or list; array form deprecated

Build durable long-running agents with Pi 1.0 and Pi Durable on Durable ObjectsPreview

Adds ML-KEM and ML-DSA algorithms behind the webcrypto_modern_algorithms compatibility flag

Versioned Git-compatible file system for Workers Paid plan; billing begins October 14, 2026Preview

v1 adds split authorization/resource server API and MCP 2026-07-28 spec supportGA

invalidate() marks cached responses stale so the cache revalidates them with the Worker

Single command-line tool for the Cloudflare API and Workers projects, with over 2,900 commandsPreview

Workflows declared in exports can be called through ctx.exports without a workflows binding

Adds getActiveSpan(), startSpan(), recordException() and setAttributes() OpenTelemetry-style span APIs

Charts show every release and gradual deployment rollout in the selected time range

Workflows can be declared in the Wrangler exports field, needing Wrangler 4.139.0 or above

Supports repositories hosted in Cursor Origin, with branch previews and pull request build status

Isolated per-pull-request environments with own code, configuration, URL and observability

Grant teammates Metadata Read-Only, Content Read-Only, Editor or Admin access to specific Workers

Delete one or up to 100 Workflow instances and their stored state via API or Wrangler

Traces now follow JavaScript RPC calls across Worker boundaries and into Durable Objects

Python Workers can connect to PostgreSQL and MySQL

Stream Workflow instance events with subscribe() and the GET /subscribe endpoint, without polling

Access can be granted to individual Workers with four roles, for members, agents and CI/CD

New configuration shape aligned with cloudflare.config.ts; removes deprecated APIs and built-in module discovery

Python 3.14 is the default for new workers with compatibility date 2026-09-08 or later

Manage rules routing email to Workers through the addresses field in Wrangler configuration

Enterprise customers can set maximum upload size up to 5 GB from the dashboard

Compressed size limit removed; 64 MiB uncompressed bundle limit applies on all plans

WSGI and ASGI web frameworks such as Django, Flask and FastAPI are supported

Limit of concurrent Dynamic Workers with in-flight requests raised from four to ten

Console logs keep exception name, message and stack, with errorInfo array for Tail Workers

Optional OAuth scopes can be chosen during authorization instead of granting all

Dashboard shows live Worker versions and traffic split per namespace, plus observed traffic share

Can be created at global scope without throwing during module evaluation

Several changes align event behavior with web specifications, including isTrusted and handler order

New compatibility flag reports listener exceptions without skipping remaining listeners; default from 2026-09-15Deprecation

Package renamed from @cloudflare/vitest-pool-workers; version 1 requires dependency, import and type updates, codemod prDeprecation

connect() handler no longer requires the experimental compatibility flag

Access can protect one Worker or all Workers, with ctx.access identity and local testing

Dashboard lists traced agents, with session replay and execution timeline views

wrangler dev and vite dev capture OpenTelemetry traces and logs for AI agents to query

nodejs_compat flags enabled by default for compatibility dates of 2026-08-04 or later

New --device flag uses OAuth Device Authorization Grant without a localhost callback server

Open-source agent runtime gives each agent a SQLite-backed filesystem, switching between isolates and Linux containersPreview

Python and JavaScript Workers can call each other through Service bindings

wrangler check startup reports bundle sizes and summarizes local CPU activity during startup

Node.js 24.18.0 is the default; Node.js 22.23.2 also preinstalled

Support MCP 2026-07-28 Specification with stateless requests; /sse no longer serves HTTP+SSE transportDeprecation

New startActiveSpan() and span.end() APIs write custom spans that outlast a callback

New API runs integration tests against Worker production builds from any Node.js test runner

Adds MCP 2026-07-28 client and server support, deprecates McpAgent and v1 createMcpHandlerDeprecation

Logs and OpenTelemetry spans include instance ID, so you can filter by $workers.durableObjectId

Skips a queued build when a newer build for the same trigger is queued

Reuses converted MCP schemas, adds includeMcpTools opt-out and direct Code Mode runtime APIs

Eligible Pay-as-you-go accounts get a default $10 account-level budget alert

Dashboard shows hourly maximum SQLite storage per namespace over time

Platforms can create temporary preview accounts via REST API to deploy Workers before user sign-in

Agents can handle MCP server elicitation requests in form and URL modes

Sends npm dependency names and versions with Worker uploads; opt out in configuration

New namespaces on accounts without a key-value backed one must use the SQLite storage backend

Deploy a static site without an account; temporary preview lasts 1 hour until claimed

Spans now carry warning attributes for non-fatal telemetry issues such as exceeded span data limits

Declarative exports field in Wrangler config replaces migrations array for class lifecycle

Package exposes only latest runtime types; dated entrypoints removedDeprecation

Named OAuth logins scoped to accounts switch automatically by working directory

New Memory Usage chart in Metrics tab shows P50, P90, P99 and P999 percentiles

New request option controls caching of origin responses with a Vary header per subrequest

Adds detached background sub-agents with progress, a runTurn entry point, and recovery fixes

New us jurisdiction restricts where objects run and store data to the United States

evictDurableObject and evictAllDurableObjects helpers added to cloudflare:test in vitest-pool-workers 0.16.20 and later

New location hints apac-ne and apac-se for finer placement within Asia-Pacific

Agents can deploy with wrangler --temporary to a preview account live for 60 minutes

Create PlanetScale Postgres and MySQL databases from Cloudflare, billed to your Cloudflare accountPrice

Adds Browser Run tool, resumable Code Mode with approvals, Think client tools, voice output selection and recovery fixes

Custom spans can be created with tracing.enterSpan() and appear in traces and OpenTelemetry exports

Z.ai agentic coding model launches with 262,144 token context windowGA

Metrics tab can be filtered by individual object ID or name in dashboard

Dynamic Workers billed count viewable in dashboard and GraphQL Analytics API

Wrangler field pipeline renamed to stream; old field deprecated but still acceptedDeprecation

Product overview pages show current-period spend and let you create budget alerts

Create, update or delete up to 100 Worker secrets in one request

Optional storage of OAuth credentials in an encrypted file with key in OS keychain

Cron schedules can be attached to a Workflow binding in wrangler.jsonc, creating an instance per run

Adds Agent Skills, Telegram messengers, scheduled tasks, Think Workflows and hardened chat recovery

Local dev servers can be shared through Cloudflare Tunnel with a public URL

Dashboard chart and GraphQL dataset show connection pool size and waiting clients

Dashboard tab to buy, connect and manage domains and routing for a Worker

Chat recovery fixes, routing retries, durable Think submissions and Voice connection control

Existing WAF rules cover new React DoS CVE; patched React and Next.js versions released

Single unified trace across service binding and Durable Object subrequests between Workers

Library runs a Workflow inside a Dynamic Worker, reloading it via Worker Loader when the Workflow resumes

Daily usage cost dashboard and email alerts when projected spend crosses a dollar threshold

Binary frames now arrive as Blob instead of ArrayBuffer; binaryType restores the old behaviorDeprecation

Concurrent instances raised from 10,000 to 50,000; creation rate to 300/second; queued instances to 2 million

Browser interface and REST API to view and edit local KV, R2, D1, Durable Objects and Workflows data

Connection freed once response headers arrive, so the six-connection limit covers only the waiting-for-headers phase

Runtime now replies automatically to Close frames, default for compatibility dates from 2026-04-07

All commands accept a --local flag to target a Workflow in a local dev session

Unique per-branch URLs trigger builds via HTTP POST, limited to 10 builds per minute per WorkerGA

New request.cf properties expose TCP and QUIC round-trip time and delivery rate

Four new RFC 9440 mTLS client certificate fields on request.cf.tlsClientAuth

ctx.id.jurisdiction reports the jurisdiction an object was created in

New secrets config property declares required secrets, validated in local development and deploy

Workers can spin up sandboxed Workers at runtime for paid users, with usage pricingPreview

pause(), resume(), restart() and terminate() work in local development with wrangler dev

Readable state, idempotent schedule(), typed AgentClient, Zod 4 required, TanStack AI support

Create, list, run and delete Cloudflare Tunnels from the CLI; experimental

Adds MCP export, drops ai and zod from main entry, custom sandbox modulesDeprecation

Object name from idFromName() or getByName() is now readable on ctx.id.name

Step context exposes current retry attempt number, starting at 1, in step.do()

Per-instance limit rises from 1,024 to 10,000 steps by default, configurable up to 25,000

Observability rewritten on diagnostics_channel, adds keepAlive() and waitForMcpConnections

Pywrangler CLI now runs on Windows, previously only macOS and Linux

Query language in the search bar filters logs and traces with fields, operators and functions

Adds experimental RPC transport for MCP, opt-in OAuth, hardened schema converter and ai-chat fixes

wrangler deploy detects framework, installs adapters and generates config when no configuration file existsGA

Also deletes the alarm with compatibility date 2026-02-24 or later

Adds dropped event metrics, typed bindings and a simpler setup mode

Rewritten as runtime-agnostic modular SDK with Executor interface; removes experimental_codemode() and CodeModeProxyDeprecation

Adds retry utilities, per-connection protocol message control, and stable @cloudflare/ai-chat v0.1.0 with data parts

Dev tools inspector replaced by a log viewer; remote inspection still possible through local WranglerDeprecation

New guide with recommendations for fast, reliable, observable and secure Workers

Multilingual text model with 131,072-token context and tool calling; new TanStack AI package, provider v3.1.1

1000 subrequest cap removed; paid default 10,000, configurable up to 10 million

Adds childEnvironments option for React Server Components via @vitejs/plugin-rsc

Workers - Agents SDK v0.4.0: Readonly connections, MCP security improvements, x402 v2 migration, and custom MCP OAuth providersDeprecation

Workers - Visualize data, share links, and create exports with the new Workers Observability dashboard

Workflows, Workers - Visualize your Workflows in the Cloudflare dashboard

Workers - New Placement Hints for Workers

Workers - Use auxiliary Workers alongside full-stack frameworks

Workers - Import SQL files as additional modules by default

Workers - `wrangler types` now generates types for all environments

Workers - Validate your generated types with `wrangler types --check`

Workers, Queues - Get notified when your Workers builds succeed or fail

Workers - Shell tab completions for Wrangler CLI

Workers Analytics Engine SQL now supports filtering using HAVING and LIKE

Workers - Build microfrontend applications on Workers