Claude

What's changed - Opus 4.6 now defaults to medium effort for Max and Team subscribers. Medium effort works well for most tasks — it's the sweet spot between speed and thoroughness. You can change this…

What's changed - Added `/simplify` and `/batch` bundled slash commands - Fixed local slash command output like /cost appearing as user-sent messages instead of system messages in the UI - Project conf…

What's changed - Fixed prompt suggestion cache regression that reduced cache hit rates

What's changed - Fixed concurrent writes corrupting config file on Windows

What's changed - Claude automatically saves useful context to auto-memory. Manage with /memory - Added `/copy` command to show an interactive picker when code blocks are present, allowing selection of…

What's changed - Expand Remote Control to more users

What's changed - VS Code: Fixed another cause of "command 'claude-vscode.editor.openLast' not found" crashes

0.84.0 (2026-02-25) Full Changelog: v0.83.0...v0.84.0 Features * api: change array_format to brackets ([925d2ad](

What's changed - Fixed BashTool failing on Windows with EINVAL error

What's changed - Fixed a UI flicker where user input would briefly disappear after submission before the message rendered - Fixed bulk agent kill (ctrl+f) to send a single aggregate notification inste…

What's changed - VS Code: Fixed extension crash on Windows ("command 'claude-vscode.editor.openLast' not found")

What's changed - Added `claude remote-control` subcommand for external builds, enabling local environment serving for all users. - Updated plugin marketplace default git timeout from 30s to 120s and a…

What's changed - Added support for `startupTimeout` configuration for LSP servers - Added `WorktreeCreate` and `WorktreeRemove` hook events, enabling custom VCS setup and teardown when agent worktree…

What's changed - Fixed Ctrl+C and ESC being silently ignored when background agents are running and the main thread is idle. Pressing twice within 3 seconds now kills all background agents. - Fixed pr…

0.26.4 (2026-02-19) Full Changelog: bedrock-sdk-v0.26.3...bedrock-sdk-v0.26.4 Bug Fixes * bedrock: eliminate race condition in AWS credential resolution ((

0.14.4 (2026-02-19) Full Changelog: vertex-sdk-v0.14.3...vertex-sdk-v0.14.4

0.78.0 (2026-02-19) Full Changelog: sdk-v0.77.0...sdk-v0.78.0 Features * api: Add top-level cache control (automatic caching) ([1e2f83d](

0.83.0 (2026-02-19) Full Changelog: v0.82.0...v0.83.0 Features * api: Add top-level cache control (automatic caching) ([a940123](

What's changed - Fixed FileWriteTool line counting to preserve intentional trailing blank lines instead of stripping them with `trimEnd()`. - Fixed Windows terminal rendering bugs caused by `os.EOL` (…

0.77.0 (2026-02-18) Full Changelog: sdk-v0.76.0...sdk-v0.77.0 Features * api: fix shared UserLocation and error code types ([c84038f](

0.82.0 (2026-02-18) Full Changelog: v0.81.0...v0.82.0 Features * api: fix shared UserLocation and error code types ([da3b931](

0.81.0 (2026-02-18) Full Changelog: v0.80.0...v0.81.0 Features * api: Make new tool versions available as top level tool types ([0a385c2](

0.76.0 (2026-02-18) Full Changelog: sdk-v0.75.0...sdk-v0.76.0 Features * api: Make new tool versions available as top level tool types ([25fe41c](

0.75.0 (2026-02-17) Full Changelog: sdk-v0.74.0...sdk-v0.75.0 Features * api: Releasing claude-sonnet-4-6 ([d75e1c0](

0.80.0 (2026-02-17) Full Changelog: v0.79.0...v0.80.0 Features * api: Releasing claude-sonnet-4-6 ([d518d6e](

What's changed - Added support for Claude Sonnet 4.6 - Added support for reading `enabledPlugins` and `extraKnownMarketplaces` from `--add-dir` directories - Added `spinnerTipsOverride` setting to cus…

What's changed - Fixed auth refresh errors

What's changed - Fixed /resume showing interrupt messages as session titles - Fixed Opus 4.6 launch announcement showing for Bedrock/Vertex/Foundry users - Improved error message for many-image dimens…

What's changed - Fixed AWS auth refresh hanging indefinitely by adding a 3-minute timeout - Added `claude auth login`, `claude auth status`, and `claude auth logout` CLI subcommands - Added Windows AR…

What's changed - Improved terminal rendering performance - Fixed fatal errors being swallowed instead of displayed - Fixed process hanging after session close - Fixed character loss at terminal screen…

What's changed - Fixed VS Code terminal scroll-to-top regression introduced in 2.1.37 - Fixed Tab key queueing slash commands instead of autocompleting - Fixed bash permission matching for commands us…

What's changed - Fixed an issue where /fast was not immediately available after enabling /extra-usage

0.79.0 (2026-02-07) Full Changelog: v0.78.0...v0.79.0 Features * api: enabling fast-mode in claude-opus-4-6 ([5953ba7](

What's changed - Fast mode is now available for Opus 4.6. Learn more at

0.74.0 (2026-02-07) Full Changelog: sdk-v0.73.0...sdk-v0.74.0 Features * api: enabling fast-mode in claude-opus-4-6 ([e337981](

What's changed - Fixed a crash when agent teams setting changed between renders - Fixed a bug where commands excluded from sandboxing (via `sandbox.excludedCommands` or `dangerouslyDisableSandbox`) co…

What's changed - Fixed agent teammate sessions in tmux to send and receive messages - Fixed warnings about agent teams not being available on your current plan - Added `TeammateIdle` and `TaskComplete…

0.2.3 (2026-02-05) Full Changelog: foundry-sdk-v0.2.2...foundry-sdk-v0.2.3 Bug Fixes * client: avoid memory leak with abort signals ([53e47df](

0.26.3 (2026-02-05) Full Changelog: bedrock-sdk-v0.26.2...bedrock-sdk-v0.26.3 Bug Fixes * client: avoid memory leak with abort signals ([53e47df](

0.14.3 (2026-02-05) Full Changelog: vertex-sdk-v0.14.2...vertex-sdk-v0.14.3 Bug Fixes * client: avoid memory leak with abort signals ([53e47df](

0.78.0 (2026-02-05) Full Changelog: v0.77.1...v0.78.0 Features * api: Release Claude Opus 4.6, adaptive thinking, and other features ([3ef1529](

0.73.0 (2026-02-05) Full Changelog: sdk-v0.72.1...sdk-v0.73.0 Features * api: Release Claude Opus 4.6, adaptive thinking, and other features ([f741f92](

What's changed - Claude Opus 4.6 is now available! - Added research preview agent teams feature for multi-agent collaboration (token-intensive feature, requires setting CLAUDECODEEXPERIMENTALAGENTTEAM…

0.77.1 (2026-02-03) Full Changelog: v0.77.0...v0.77.1 Bug Fixes * structured outputs: send structured output beta header when format is omitted ((

0.72.1 (2026-01-30) Full Changelog: sdk-v0.72.0...sdk-v0.72.1 Bug Fixes * client: remove OutputFormat exports from index.ts ([bf2cf08](

0.77.0 (2026-01-29) Full Changelog: v0.76.0...v0.77.0 Features * api: add support for Structured Outputs in the Messages API ([ad56677](

0.2.2 (2026-01-29) Full Changelog: foundry-sdk-v0.2.1...foundry-sdk-v0.2.2 Chores * internal: version bump ([24ecc83](

0.26.2 (2026-01-29) Full Changelog: bedrock-sdk-v0.26.1...bedrock-sdk-v0.26.2 Chores * internal: version bump ([24ecc83](

0.14.2 (2026-01-29) Full Changelog: vertex-sdk-v0.14.1...vertex-sdk-v0.14.2 Chores * internal: version bump ([24ecc83](

0.72.0 (2026-01-29) Full Changelog: sdk-v0.71.2...sdk-v0.72.0 Features * api: add support for Structured Outputs in the Messages API ([eeb7fab](

0.76.0 (2026-01-13) Full Changelog: v0.75.0...v0.76.0 Features * allow raw JSON schema to be passed to messages.stream() ([955c61d](

0.75.0 (2025-11-24) Full Changelog: v0.74.1...v0.75.0 Features * api: adds support for Claude Opus 4.5, Effort, Advance Tool Use Features, Autocompaction, and Computer Use v5 ([5c3e633](

0.74.1 (2025-11-19) Full Changelog: v0.74.0...v0.74.1 Bug Fixes * structured outputs: use correct beta header ([e90d347](

0.74.0 (2025-11-18) Full Changelog: v0.73.0...v0.74.0 Features * add Foundry SDK (3ae9e45) Bug Fixes

0.73.0 (2025-11-14) Full Changelog: v0.72.1...v0.73.0 Features * api: add support for structured outputs beta ([688da81](

0.72.1 (2025-11-11) Full Changelog: v0.72.0...v0.72.1 Bug Fixes * client: close streams without requiring full consumption ([109b771](