1Code v0.0.84

What's New

Features

• GPT 5.4 model support — Added OpenAI's latest GPT 5.4 model as the new default for Codex runtime, replacing GPT-5.3 Codex
• Copy button in text selection popover — Select any text in chat to quickly copy it with a new Copy icon button

Improvements & Fixes

• Instant new chat creation — Creating a new sub-chat is now instant (optimistic UI update) instead of waiting for DB insert, with full rollback on failure
• Double-click guard on new chat — Prevents duplicate sub-chats from rapid Cmd+T or double-clicking the new chat button
• Race condition safety net — If a message is sent before the sub-chat row is persisted, the backend now auto-creates it instead of silently failing
• Nested session error fix — Fixed "Claude Code cannot be launched inside another session" error when running the dev build from a Claude Code terminal
• Changelog URL fix — Updated changelog links to point to the correct URL

Downloads

• macOS (Apple Silicon): 1Code-0.0.84-arm64.dmg
• macOS (Intel): 1Code-0.0.84.dmg
• Windows: 1Code Setup 0.0.84.exe
• Linux (AppImage): 1Code-0.0.84.AppImage
• Linux (deb): 21st-desktop_0.0.84_amd64.deb

1Code v0.0.83

Bug Fixes

• Drag-to-split for pinned sub-chats — Pinned sub-chats in the sidebar can now be dragged to create split view
• Custom slash commands — Fixed projectPath not being passed to getContent when expanding custom slash commands

Downloads

• macOS (Apple Silicon): 1Code-0.0.83-arm64.dmg
• macOS (Intel): 1Code-0.0.83.dmg
• Windows: 1Code Setup 0.0.83.exe
• Linux (AppImage): 1Code-0.0.83.AppImage
• Linux (deb): 21st-desktop_0.0.83_amd64.deb

1Code v0.0.82 (hotfix)

Hotfix

• Fixed approve plan buttons in split view — Resolved stale isActive prop that was breaking approve/reject plan buttons when using split panes

Downloads

• macOS (Apple Silicon): 1Code-0.0.82-arm64.dmg
• macOS (Intel): 1Code-0.0.82.dmg
• Windows: 1Code Setup 0.0.82.exe
• Linux (AppImage): 1Code-0.0.82.AppImage
• Linux (deb): 21st-desktop_0.0.82_amd64.deb

1Code v0.0.81

What's New

Bug Fixes

• Analytics fix — Fixed PostHog analytics not sending events from the desktop app

Downloads

• macOS (Apple Silicon): 1Code-0.0.81-arm64.dmg
• macOS (Intel): 1Code-0.0.81.dmg
• Windows: 1Code Setup 0.0.81.exe
• Linux (AppImage): 1Code-0.0.81.AppImage
• Linux (deb): 21st-desktop_0.0.81_amd64.deb

1Code v0.0.80

What's New

New Features

• Two-column commit diff viewer — Browse commit diffs in a resizable two-column layout with a file list on the left and diff on the right

Bug Fixes

• Context menu in file list — Fixed context menu not appearing in FileListItem due to Radix asChild nesting issue

Downloads

• macOS (Apple Silicon): 1Code-0.0.80-arm64.dmg
• macOS (Intel): 1Code-0.0.80.dmg
• Windows: 1Code Setup 0.0.80.exe
• Linux (AppImage): 1Code-0.0.80.AppImage
• Linux (deb): 21st-desktop_0.0.80_amd64.deb

1Code v0.0.79

What's New

New Features

• Drag sub-chats from sidebar to split view — Drag any sub-chat from the sidebar directly into a split pane
• Upgraded diff viewer — Updated @pierre/diffs to 1.1.0-beta.18 with theme integration fixes
• Missing tool types registered — Added missing tool type registrations in AgentToolRegistry for better tool rendering

Bug Fixes

• Fixed tab close freezing — Closing a tab no longer freezes the app
• Correct file stats in search popover — File count and diff stats now display correctly in the search popover

Downloads

• macOS (Apple Silicon): 1Code-0.0.79-arm64.dmg
• macOS (Intel): 1Code-0.0.79.dmg
• Windows: 1Code Setup 0.0.79.exe
• Linux (AppImage): 1Code-0.0.79.AppImage
• Linux (deb): 21st-desktop_0.0.79_amd64.deb

1Code v0.0.78

What's New

New Features

• Per-pane tab groups with native drag-and-drop — Each split pane now has its own tab bar with native DnD for reordering tabs, plus sidebar mode switching and Dockview improvements
• Sortable sub-chats in sidebar — Drag-and-drop reordering of sub-chats in the sidebar using dnd-kit
• Branch info in PR card — PR card badge now shows the branch name

Bug Fixes

• Fork from here during active stream — Fixed: you can now fork a conversation while the agent is still streaming
• SDK 0.2.63 compatibility — Fixed thinking config API usage and "Agent" tool name rename from claude-agent-sdk 0.2.63
• Sub-chat rename toast — Fixed error toast appearing on rename by removing broken onSuccess callback
• Sidebar tooltip cleanup — Tooltip now hides correctly on archive/close operations

Downloads

• macOS (Apple Silicon): 1Code-0.0.78-arm64.dmg
• macOS (Intel): 1Code-0.0.78.dmg
• Windows: 1Code Setup 0.0.78.exe
• Linux (AppImage): 1Code-0.0.78.AppImage
• Linux (deb): 21st-desktop_0.0.78_amd64.deb

1Code v0.0.77

What's New

Bug Fixes

• File stats in sub-chat sidebar — Fixed optimized sub-chat query to include file count, additions, and deletions stats
• PR status cache invalidation — PR status now correctly refreshes when switching branches
• PostHog SDK update — Updated PostHog SDK and unified desktop API key

Downloads

• macOS (Apple Silicon): 1Code-0.0.77-arm64.dmg
• macOS (Intel): 1Code-0.0.77.dmg
• Windows: 1Code Setup 0.0.77.exe
• Linux (AppImage): 1Code-0.0.77.AppImage
• Linux (deb): 21st-desktop_0.0.77_amd64.deb

1Code v0.0.76

What's New

New Features

• PR comments in details sidebar — View all PR comments (general + code-level review comments) directly in the sidebar. Comments show author, timestamp, markdown body, and file path with diff hunks for code comments. Includes copy button per comment and "Copy All" functionality
• Branch switcher in diff view — Click the branch name in the diff header to open a searchable popover for switching branches. When uncommitted changes exist, shows a dialog to carry or stash them
• Drag-and-drop queue reordering — Reprioritize pending messages in the queue by dragging and dropping
• Editable PR title — Rename your PR title directly from the Workspace widget
• Keyboard shortcut for split view — Press Cmd+Shift+T to create a new sub-chat directly in split view. The "+" button tooltip now shows both shortcuts (Cmd+T and Cmd+Shift+T)
• Pull & Push dialog for remote ahead errors — When pushing fails because the remote branch has new commits, a dialog now offers to pull (with auto-stash and rebase) and push in one action, instead of showing a generic error
• PR status widget in details sidebar — Pull request status is now displayed in the desktop details sidebar

Improvements

• Claude Agent SDK updated to v0.2.63 — Updated from v0.2.61, with Claude CLI binary updated to v2.1.63
• Auto-delete empty sub-chats — Empty sub-chats are automatically cleaned up on close, and file stats are now cached in the database for faster sidebar rendering
• Sub-chat navigation hotkey fix — Cmd+[ / Cmd+] now correctly navigates sub-chats in sidebar order
• PR status auto-refresh — After a successful commit or push, PR status queries are automatically refreshed

Bug Fixes

• Fixed PostHog API key and resolved infinite identify calls

Downloads

• macOS (Apple Silicon): 1Code-0.0.76-arm64.dmg
• macOS (Intel): 1Code-0.0.76.dmg
• Windows: 1Code Setup 0.0.76.exe
• Linux (AppImage): 1Code-0.0.76.AppImage
• Linux (deb): 21st-desktop_0.0.76_amd64.deb

1Code v0.0.75

What's New

Improvements

• Claude Agent SDK updated to v0.2.61 — Updated from v0.2.45, bringing parity with Claude Code CLI v2.1.61. Includes support for adaptive thinking (Opus 4.6), effort levels, prompt suggestions, session management APIs, and new hook events
• Claude CLI binary updated to v2.1.61 — Latest Claude Code CLI with improved stability and new model capabilities

Downloads

• macOS (Apple Silicon): 1Code-0.0.75-arm64.dmg
• macOS (Intel): 1Code-0.0.75.dmg
• Windows: 1Code Setup 0.0.75.exe
• Linux (AppImage): 1Code-0.0.75.AppImage
• Linux (deb): 21st-desktop_0.0.75_amd64.deb