Zed 1.21.0

This week's release includes faster rendering in syntax-highlighted files and Markdown code blocks, a language server command picker, a setting that keeps your system awake during long-running agent turns, and BYOK support for Claude Opus 5.5 (Anthropic) and GPT-6 Astra, Sol, and Luna (OpenAI). Features AI

Added SuperGrok sign-in so SuperGrok subscribers can use Grok models in the Agent Panel. (#63248; thanks thibaudgg) Added the agent.prevent_idle_sleep setting, enabled by default, to prevent idle system sleep while agent threads are running. (#53130; thanks cppcoffee) Added support for DeepSeek Flash 4.1. (#64014; thanks cppcoffee) Added the agent.threads_sidebar_default_width setting to configure the width of the Threads Sidebar. (#62883; thanks porada) Added the agent: rename selected thread action for renaming the active Terminal Thread from the Agent Panel. (#63660; thanks mauriciord) Added BYOK support for Claude Opus 5.5 with an Anthropic API key. (#64627) Added BYOK support for GPT-6 Sol and GPT-6 Luna with an OpenAI API key. (#64628) Added BYOK support for GPT-6 Astra with an OpenAI API key. (#64420) Added Z.ai GLM to the Mistral provider. (#63535; thanks ummon-v) Improved ACP compatibility and async task wakeup handling. (#64077)

Git

Added Cut, Copy, and Paste context menu actions to the commit message editor. (#64142; thanks hooch)

Languages

Added a language server command picker and support for language servers to open files and URLs with showDocument requests. (#63607) Added a prompt to install the Emmet extension when opening files in Emmet-supported languages. (#63750) Added support for running language-server actions directly from actionable inlay hints. (#63605) Improved rendering performance for Markdown code blocks in the Agent Panel, hover popovers, and Markdown preview. (#63138) Improved development extension compilation by automatically replacing outdated WASI SDK installations. (#63816; thanks jkbz64)

Other

Added a comment_empty_lines parameter to the editor::ToggleComments keybinding action for multiline selections. Set it to true to comment blank lines or false to skip them; Zed's default keymap now uses true, while the VS Code keymap uses false. (#63961; thanks UdeshyaDhungana) Added editor.code_lens.foreground for customizing CodeLens text independently. (#64084; thanks giorgiopogliani) Added support for "..." in read_only_files so project settings can extend inherited read-only patterns. (#64222; thanks porada) Added menu (Linux and Windows) and shift-f10 (all platforms) shortcuts to open the context menu for the selected Project Panel entry. (#46744; thanks CCXLV) Improved editor rendering performance in syntax-highlighted files, especially with the minimap enabled. (#63145)

Bug Fixes

Fixed a bug where folders remained highlighted after they stopped being dragged. (#64038; thanks tidely) Fixed the macOS traffic light animation when exiting fullscreen. (#64339; thanks tidely) Fixed a bug where restored macOS windows reopened on the currently active Space instead of their original Space. (#58886; thanks tnayuki) Fixed auto-compaction thresholds for GitHub Copilot models with a prompt limit below their context window. (#64195) Fixed the Inline Assistant failing to select an available fallback model when no default model was configured. (#63963; thanks hferreiro) Fixed a bug on macOS where moving the pointer over another app could trigger hover effects in a Zed window underneath it. (#64234) Fixed a bug where deleted files appeared outside the file tree in the Outline Panel when viewing a diff. (#63570; thanks FrantisekGazo) Fixed a crash during Python interpreter discovery when an executable emitted non-UTF-8 output. (#64040) Fixed a crash when pasting in an expanded deleted diff hunk in Helix mode. (#64245) Fixed a Linux startup crash when local XKB keyboard-definition files were unavailable. (#64113) Fixed Anthropic credit exhaustion being classified as a malformed request instead of a payment issue. (#63988) Fixed canceled external file drags on Linux Wayland sometimes remaining active and causing later clicks to copy the dragged file. (#64122; thanks itsfuad) Fixed compilation of development extensions on Windows ARM64. (#63816; thanks jkbz64) Fixed compilation of development extensions with large Tree-sitter grammars. (#63816; thanks jkbz64) Fixed data-retention consent checks for hosted counting and compaction requests. (#64194) Fixed diff statistics to use the theme's version-control colors for added and deleted line counts. (#64083; thanks kvechkanov) Fixed font suggestions listing unavailable fallback fonts and internal font aliases. (#64095) Fixed intermittent "database is locked" errors when sharing a database across Zed instances. (#63923; thanks whitecat1331) Fixed Ollama being unable to access images returned by tool calls. (#64121; thanks marius851000) Fixed Python decorator syntax highlighting conflicting with the matrix multiplication operator. (#58077; thanks allachance) Fixed remote server removal prompts not capturing keyboard focus. (#60965; thanks cfiq) Fixed terminal tool output in the Agent Panel to consistently use the theme's terminal.background color. (#64163; thanks chrisdrackett) Fixed the gutter tooltip's modifier-click hint after holding Command. (#64124; thanks GautamBytes) Fixed the Project Panel failing to scroll to collapsed parent folders. (#64207) Fixed a crash when typing into an empty side of a merge conflict. (#64604) Fixed newly available ChatGPT subscription models not appearing in the model picker. (#64625) Fixed the Git Panel unexpectedly switching repositories when viewing changes in multi-repository projects. (#58795; thanks mengh04) Fixed deleted Git gutter markers disappearing at narrow custom widths. (#64469; thanks rajin-khan) Fixed a bug where a project root folder could not be renamed to match a child folder. (#64268; thanks D4r3NPo) Fixed the thinking toggle for Mistral Small and Medium. (#63535; thanks ummon-v)