agents Releases

This patch release fixes a critical bug where `subAgent()` caused cross-DO I/O errors on first use, and introduces a new `_cf_initAsFacet()` RPC to properly initialize facets. It also removes the requirement for the `"experimental"` compatibility flag for `ctx.facets`, `ctx.exports`, and `env.LOADER`. Additionally, it adds a `createdAt` field to recovery contexts to help apps guard against stale interruptions.

Apr 18, 2026

This patch release exposes the `createdAt` timestamp on both `FiberRecoveryContext` and `ChatRecoveryContext`, allowing applications to detect and suppress continuations for stale, interrupted conversation turns. The field contains epoch milliseconds when `runFiber` started, read from the existing `cf_agents_runs` tracking data.

Apr 18, 2026

This patch release adds extensive esbuild configuration options to `createWorker` and `createApp` (including jsx mode, jsxImportSource, define, loader overrides, and conditions), along with an escape hatch for advanced plugins. It also fixes a critical bug where importing the bundler from Node.js caused a confusing 'Cannot find package gojs' error by making the WASM import lazy and adding runtime detection.

Apr 18, 2026

This patch makes `Workspace` idempotent on duplicate construction for the same `{sql, namespace}` when storage options (`r2`, `r2Prefix`, `inlineThreshold`) agree. It fixes issues with Vite HMR re-evaluating Durable Object modules and helpers constructing short-lived Workspaces alongside existing ones. The guard is preserved to catch actual bugs when storage options diverge.

Apr 18, 2026

This patch fixes a security vulnerability in the MCP client's SSRF protection where the IPv6 link-local range `fe80::/10` was not being fully blocked. The previous `startsWith("fe80")` check only matched `fe80::/16`, allowing addresses in the `fe81::`–`febf::` range to slip through. The fix uses a regex to properly match the full /10 range and factors out the IPv6 private-range logic.

Apr 17, 2026

This patch release adds a new `sendEmail()` method to the Agent class for sending outbound email via Cloudflare Email Service, along with general dependency updates.

Apr 16, 2026

This is a patch release that fixes an issue where peer dependency ranges for the `agents` package were being incorrectly overwritten from wide ranges to tight `^0.x.y` versions during the pre-publish script. The fix ensures correct peer dependency ranges are preserved when publishing.

Apr 15, 2026

This is a patch release (0.4.4) that fixes an issue with how peer dependency ranges were being published for the `agents` package. The pre-publish script was incorrectly overwriting wide dependency ranges to tight `^0.x.y` versions, which has now been corrected.

Apr 15, 2026

This patch release fixes an issue where peer dependency ranges for the `agents` package were being incorrectly overwritten from wide ranges to tight `^0.x.y` versions by a pre-publish script. The fix ensures correct peer dependency ranges are maintained when publishing.

Apr 15, 2026

This patch release enables `chatRecovery` by default in the Think agent, wrapping chat turns in `runFiber` to provide durable execution out of the box. This is a small patch update (0.2.4) from contributor @threepointone.

Apr 15, 2026

This is a patch release (3.0.9) that fixes incorrect peer dependency ranges in the `agents` package. The published packages had tight `^0.10.x` ranges instead of the intended broader ranges (`>=0.8.7 <1.0.0` / `>=0.9.0 <1.0.0`), which was causing install warnings with `agents@0.11.0`. The release also updates the changesets config to prevent this issue from recurring.

Apr 15, 2026

This patch release fixes peer dependency ranges for the `agents` package that were incorrectly set, causing install warnings with `agents@0.11.0`. It also stabilizes the `chatRecovery` feature by renaming it from `unstable_chatRecovery` to `chatRecovery`.

Apr 15, 2026

This patch release fixes a critical bug where `getConfig()` would throw a 'no such table' error when called inside `configureSession()`, and stabilizes the `chatRecovery` feature by renaming it from `unstable_chatRecovery`.

Apr 15, 2026

This patch release fixes incorrect peer dependency ranges in the `agents` package that were causing install warnings with `agents@0.11.0`. The published packages had tight `^0.10.x` ranges instead of the intended broader ranges (`>=0.8.7 <1.0.0` / `>=0.9.0 <1.0.0`). Additionally, the changesets configuration was updated to prevent this issue from recurring in future releases.

Apr 15, 2026

This patch release (@cloudflare/think@0.2.2) introduces first-class browser tools for CDP-based web automation, expanding the execution capabilities of the Cloudflare Think framework to include browser automation alongside existing workspace, execute, and extensions tools.

Apr 14, 2026

This minor release (0.11.0) adds experimental browser CDP tools for the Agents SDK, utilizing the live Browser Rendering protocol instead of bundling the specification. The update includes Wrangler-backed end-to-end tests for the local browser-binding flow.

Apr 14, 2026

This patch release fixes a critical bug where `applyChunkToParts` was dropping `providerMetadata` on `reasoning-end` and `reasoning-delta` chunks. For Anthropic models with extended/adaptive thinking, this caused the thinking block signature to be lost, making extended thinking effectively single-turn only as `@ai-sdk/anthropic` would silently drop the thinking block on subsequent turns.

Apr 13, 2026

Added support for the latest Claude models (Opus 4.6 and Sonnet 4.6) with expanded capabilities including 1M context windows and reasoning features.

Apr 9, 2026

Updated dependencies, unified Node.js version to 22, and fixed build and UI bugs including chat visibility and package conflicts.

Apr 8, 2026

A minor patch release for Cloudflare Agents that pins specific actions to prevent potential issues and bumps the version number.

Apr 1, 2026