What's new

• Worktrees in Changes: the git worktrees inside the project nest under their repository, with their branch, what is left to merge and the sessions working there; a committed one is a single line, an idle one a chip. A violet card warns when the same file changes on two branches. Review can open one worktree, and Compare with main shows it against main. Tabs of a worktree’s files carry its glyph; sessions working in one show its name.
• When Atelier isn’t sure who changed a file: one chip for all the sessions that could have done it, and a collapsed “Maybe” group under each of them. The chip (or Who Changed This… in the row’s menu) opens “Why unsure”: when the file changed, each candidate’s command and where it ran. Pick the session, or someone outside Claude, with Undo. Showing where each command ran needs File › Restart atelierd.
• Next / previous change in a file: arrows with a “2 / 5” counter in the file bar, Go › Next Change (⌥F5) and Previous Change (⌥⇧F5).
• Reveal in Finder for terminals (⌘⌥R, or right-click): the folder the shell is in now; Claude’s folder for a session.
• “Finished” only after a long turn (Settings › Notifications, 1 min by default): quick replies stay quiet; errors always notify.
• Option is no longer Meta in terminals by default, so ⌥ types @ # [ ] { } ~ on Italian and other European layouts. Settings › Terminal › “Option key as Meta” brings back ⌥B / ⌥F word moves.
• ClickUp tasks open in the ClickUp app when it is installed (Settings › Connectors to turn it off), and the card names your workspace after its spaces.
• Right-click inside tmux or vim goes to the program; Shift-right-click opens Atelier’s menu.
• Collapse folders in Files; sessions grouped by state and compact Changes rows by default.
• Long dictations get the time to be polished; the project window opens where the welcome window was.
• Fixes: "error": null lines in service logs are no longer errors; wide tooltips stay next to what they describe; squash- or rebase-merged worktrees have nothing left to merge, and removed ones leave Changes.

• Source Control (the new git icon in the left bar, or ⌃⇧G): every repository of the project in a switcher, its branches, tags, worktrees and stashes, and a History tab with a graph of every branch, each commit’s files and diffs, any branch or tag viewed without checking it out, branch compare and files opened as they were at a commit. Read-only: it never checks out, commits, fetches or pushes, and it follows new commits as they happen.
• Connectors, ClickUp first (Settings › Connectors): sign in once in your browser and Atelier lists the ClickUp tasks assigned to you. Atelier is read-only: it never changes anything in ClickUp, whatever the account allows. The connection is kept encrypted in your macOS Keychain; Disconnect forgets it.
• Start a session from a task: ⌘K shows your tasks (or type task:). Enter starts a session named after the task with its description typed into Claude’s prompt, ready for you to read and send; ⌘Enter sends it right away, ⌥Enter opens it to the side. The session keeps a task chip: one click opens the task in ClickUp.
• Session panel: click the model chip (or View › Session Panel) to switch model, step through permission modes, compact or clear, and see the MCP servers, skills and plugins configured for the project. Commands are typed only when Claude is waiting for you and never on top of a draft you haven’t sent.
• Session names in step with Claude: a session shows the same name in Atelier and in Claude’s own /resume. Rename it in Atelier and Claude gets the name with your next message (nothing is typed into its prompt); rename it inside Claude and Atelier follows; unnamed sessions show the title Claude gives them. Needs File › Restart atelierd.
• Notifications you notice: “Play a sound” is now Atelier’s own chime, also with the window in front (never for a session on screen). Settings › Notifications has Send Test and a shortcut to macOS’s notification settings.
• Images (png, jpeg, gif, webp, bmp, ico, avif) open as pictures, with Fit / 100%, dimensions and size.
• Swap side panels (Settings › Appearance, View menu, palette) puts the sidebar on the right.
• Closing a tab goes back to the one you used before it.
• ⌘V with files copied in Finder pastes their paths (Claude attaches images).
• Ctrl+C or Esc on a working Claude shows the session ready again.
• Gosu syntax highlighting (.gs, .gsx, .gsp); Changes remembers By repo / By session.

• Background work: a session whose Claude is waiting on background commands, subagents or scheduled jobs reads as Working, with chips for what is running, and gets one “Finished” when the work really ends. Needs Atelier’s background service restarted once (File › Restart atelierd).
• Who changed what: changes made by commands are attributed to the session that ran them; when several sessions could have made a change, every candidate shows a dashed dot instead of a guess. Also needs File › Restart atelierd.
• New tab bar: the active tab lifts out of the bar with the brand gradient on top and flows into the file below; with many tabs the mouse wheel scrolls them sideways, the active tab always comes into view, and ”+” and Changes stay in place.
• New app icon for macOS 26: full size in the Dock and Finder, with the system’s glass look.
• Terminal › Aliases in Settings lists the aliases from your shell.
• A new session shows as a session from its first moment (“Starting…”), and a resumed one shows its screen right away.
• Split view: up to three tabs side by side (sessions, terminals, files). Split Right (⌘), Open to the Side from any tab, row or file menu (or ⌥-click), or drag a tab onto the edge of the workspace. ⌘⌥←/⌘⌥→ move between panes, dividers resize them (double-click for equal widths). Each project remembers its panes after a restart, without starting anything by itself.
• Listening ports: terminals and sessions running a server show its port (:3000); one click opens it in the browser. Needs Atelier’s background service restarted once (File › Restart atelierd).
• Pull request and CI: a session working on a branch with a pull request shows #123 with its checks (green, failing, running); click to open it, ⌥-click for the checks. Uses the GitHub CLI when it is installed and signed in; can be turned off in Settings › Claude.

First beta for colleagues. Atelier is a macOS app (Apple Silicon) for running many Claude Code sessions side by side.

• Sessions that stay alive: Claude Code runs in real terminals owned by a background service, so sessions survive closing the window, updating the app and restarting the Mac (resume them from the sidebar or with ⌘⇧N).
• Know who needs you: each session shows its state (needs permission, has a question, working, done, failed), model, context and cost; ⌘J jumps to the next session waiting for you; notification center (⌘⇧J), Dock menu and banners for finished or blocked sessions.
• Tabs for terminals and files, a command palette (⌘K or F1) and context menus everywhere; pinned sessions, groups by state, sessions and terminals in any folder of the project. Closing a tab only hides it: sessions keep running in the sidebar until you close them there.
• Files and editor: file tree with git colors, a fast editor (save, find, comment, change language), safe handling of conflicts with Claude’s edits, files moved to the Trash, never deleted.
• Review Claude’s work: Changes view colored by the session that touched each file, a Review tab with hunks and line comments you can send back to the session as @file#L10-24 references.
• Atelier terminal profile: a clean, fast zsh with command blocks (⌘↑/⌘↓, copy command or output) and output triggers that notify or highlight; your own zsh or bash are one click away.
• Dictation (off by default, Settings › Dictation): hold ⌥Space to talk to Claude; transcription runs locally (whisper.cpp on Metal, a 574 MB model downloaded on first setup), optionally polished.
• Settings (⌘,) for appearance, terminal, editor, Claude defaults, notifications, dictation and shortcuts.
• Automatic updates: Atelier checks for new versions in the background, verifies their signature and installs them on the next restart without closing your sessions. Choose the Stable or Beta channel in Settings › About.