What changed, on every surface, within minutes.

• Fixed claude -p inside cloud sessions reporting "Not logged in" when started without the session's environment variables
• Fixed an API error being replaced by "prompt is too long", and an unneeded compaction, in sessions with many MCP tools

• fix(cli): enforce read-only workspace settings in untrusted folders by @jvargassanchez-dot in https://github.com/google-gemini/gemini-cli/pull/29583
• fix(core): avoid duplicate tool response turns when resuming sessions by @diegogodinezr in https://github.com/google-gemini/gemini-cli/pull/29618
• fix(core): prevent deletion of resumed session history on quick exit (#29198) by @villahernandez-coder in https://github.com/google-gemini/gemini-cli/pull/29584
• Changelog for v0.64.0-preview.0 by @gemini-cli-robot in https://github.com/google-gemini/gemini-cli/pull/29656

• Added sandbox.allowNestedUserNamespaces so sandboxed commands on Linux can create user namespaces (Chromium, rootless podman); this lets them get around the sandbox's file protections
• Added CLAUDE_CODE_RETRY_WATCHDOG_USAGE_LIMIT_RECHECK_MS so unattended retry mode (CLAUDE_CODE_RETRY_WATCHDOG) notices a usage limit that was lifted before its reset
• Fixed every request failing on Vertex, Bedrock and other providers when the endpoint or a gateway rejects tool search, and behind gateways with ToolSearch disallowed or left out of --tools (a 2.1.304 regression): Claude…
• Fixed /effort and /autocompact settings not applying when the model name differed from a modelOverrides value by letter case or a [1m] tag

• Added session/leave to the session protocol, so a client can hand one loaded session to another host while this host and its other sessions keep running
• Added a built-in web3d skill that guides building single-file 3D web pages and browser games and checking them in a browser before handoff
• The TypeScript and Python SDKs can answer the agent's questions with Session.answerUserInput and Session.answer_user_input, including a question still open when a session is resumed
• Agent plugins can supply MCP servers with per-server review and muse mcp login sign-in

Feature · API: v1/responses You can now choose 12-hour prompt caching in the API. 12-hour prompt caching keeps shared instructions, tools, and context cached longer to benefit from lower cached-input pricing, even when requests are hours apart. 12-hour cache writes cost 2.5x the input token price. Read more here.

• Inference hooks are out of beta for Claude Enterprise organizations.
• We've launched user profiles, so you can tell Anthropic which of your end customers each API request is for. If you operate a platform or gateway, or resell API access, a safety enforcement action can then apply to one…
• We've added organization webhooks to the Admin API, in beta with the webhooks-2026-10-07 beta header. Its /v1/organizations/webhooks endpoints register webhook endpoints for two event types: one for when Anthropic…

• Added a transcript line when a plugin that runs first skips one of your mod's hooks, naming the event and the plugin
• Added decider: "person" to a mod's tool.check answer: only the permission dialog or a host's callback can approve the ask, and it is refused with the mod's reason where nobody can be asked
• Added e.isReadOnly to a mod's tool.check event, set when the tool call is read-only
• Added /auto-mode-setup: a guided setup that reads your project and recent sessions to teach auto mode about your environment, now also available on Bedrock, Vertex, Foundry, Claude apps gateway and telemetry-disabled…