• Customize shortcuts in the config file. Preferences → General → Keyboard opens the active config and includes an expandable reference with action names, default shortcuts and examples. Menus, buttons and the command palette show your configured shortcuts. Restart Neptune after editing the file.
• Open a dev server from its terminal's port chip. Local listeners appear on the tab or toolbar; clicking one in an SSH workspace forwards the remote port to your computer. A menu lets you stop forwarding or retry a failure.
• Ctrl-click a filename or diagnostic location in a terminal (Command-click on macOS) to open it in Neptune's file explorer or your preferred editor. Choose the editor in Preferences → General. Use Ctrl+Shift+H (Command+Shift+H on macOS) to label visible paths, hashes and URLs, then type a label to copy its target without selecting it.
• Keep a row or column of terminals evenly sized as you split, close or move them. Double-click a divider to even its row or column, or use **Even terminal sizes** in the command palette for the whole workspace. Each workspace now holds up to 16 terminals, including tabs and agents without a tab.
• Review what changed without leaving the terminal. The new Changes tab of the right panel shows the branch of the focused terminal's folder and the files that differ, with a diff of the one you click. Choose **Working tree** for work that is not committed yet, or **Branch** for everything the branch holds since it left the main one. Each workspace's row in the sidebar now shows its branch, with a dot while it has uncommitted changes. Needs Git installed.
• See every Claude Code and Codex agent running in any workspace in the new Agents tab of the right panel: which are working, which are idle and which are waiting for you to allow a tool, answer a question or approve a plan. Click an agent to go to its terminal. The toolbar's panel button, which now opens the file explorer and the agents as tabs, carries a dot while an agent waits out of view. Codex asks once to trust the hooks that report this.
• The Agents tab also lists OpenCode, Gemini CLI, pi and Oh My Pi, and agents you start in SSH workspaces. OpenCode, pi and Oh My Pi sessions reopen with their conversations like Claude Code's and Codex's. On an SSH host Neptune keeps a few small adapter scripts in your cache directory and reports through the terminal itself, so the host needs nothing installed and no extra connection. OpenCode, Gemini CLI and pi do not ask for attention on their own, so Neptune alerts you when one of them finishes or starts waiting in a terminal you are not looking at.
• Let Claude Code and Codex work together. Ask one for the other, such as "build the backend and let Claude Code handle the frontend", and it starts that agent out of view, hands it the task, reads its answer and can keep talking to it. The tab of an agent that started others shows how many; click the count to list them and open one's terminal in a tab. A started agent can be given its own directory, such as a git worktree, a model, an effort level and its CLI's ultra mode (ultracode or Ultra). One you closed can be opened again with its conversation, and a question a started agent's CLI asks before it begins is passed on to you at once.
• Update without reinstalling on macOS and with the Linux AppImage. Once an update is downloaded and verified, **Restart to update** replaces the app you are running and restarts it, with your workspaces restored. There is no disk image to drag to Applications and no AppImage to replace by hand. Updating *to* this version from an earlier one is still done by hand, one last time.
• See where an agent's pull request stands on its tab. The linked number now shows whether its checks pass, fail or are still running and how many review comments are unresolved, and changes colour and icon once the pull request is merged. It updates on its own, through the GitHub CLI (gh) you are signed in to; without it the number looks as before.
• Give an agent a git worktree of its own with **New agent in worktree**, in the command palette, a terminal's menu or on Ctrl+Shift+G (Command+G on macOS). Name a branch and press Enter: Neptune creates the branch, checks it out in a folder beside the repository and opens a tab there with Claude Code or Codex started. The tab is named by the branch and shows **Merged** once its work is in the default branch; click it to remove the folder and the local branch. **Remove worktree** says what would be lost before it removes anything, and keeps a branch that has unmerged commits.
• Ask Claude Code or Codex to attach its screenshots, or any file it wants you to look at, and they appear on its tab. Click the paperclip for the list: each file with its picture, where it has one. Click a picture to see it at full size and step through the others with the arrow keys; click any other file to open it. Each row also shows the file in your file manager or dismisses it from the list, leaving the file where it is.

Acceptance notes and known limitations

• Full native acceptance on every platform remains pending; this is a release candidate, not a production-stable release.
• In-place updates are verified on Linux only by replacing and restarting a test AppImage; the macOS bundle replacement has not yet run on a Mac.
• Saved workspaces now use schema version 11, which records which terminal's agent started another's, which of those terminals have no tab, the git worktree made for a terminal's agent, attached files, and sessions of OpenCode, Gemini CLI, pi and Oh My Pi. Older workspace files still load, but RC3 and earlier cannot save over layouts written by this version. Back up workspace state before testing if you need to return to an earlier candidate. Older builds also reject workspaces containing more than 12 terminals.
• Agents in worktrees are for local terminals with git on PATH. Neptune does not fetch, so a pull request merged on a server shows as merged after your checkout fetches or pulls it. On Windows the tab opens in the worktree without starting a CLI.
• Port discovery requires the host's process/socket tools. Windows SSH port discovery and forwarding need noninteractive key or SSH-agent authentication; remote discovery requires a Linux or Unix host. Port chips identify TCP listeners, which may not be HTTP services.
• The reported intermittent native Wayland freeze still needs a capture of the blocking state. Earlier XWayland fixes do not establish native Wayland acceptance.
• Windows installers remain unsigned and may show an unverified-publisher or SmartScreen warning. Both macOS installers require signing and notarization; all installers are covered by signed update metadata and build attestations.
• Linux x64 packages require glibc 2.35 or newer and working host graphics drivers. Browser-downloaded AppImages need execute permission before launch; enable it in file Properties or run chmod u+x on the downloaded file.
• Workspace restoration starts fresh shells and SSH connections; arbitrary running commands and process memory are not restored. Coding-agent features remain limited to the supported providers and platform paths.
• SSH requires an installed OpenSSH client and a POSIX remote shell. Remote directory tracking is integrated for zsh; other shells need OSC 7 integration.
• Kitty graphics and comprehensive complex-script shaping remain unsupported. Keypad identity and some keyboard-layout information depend on the window toolkit. IME, accessibility and mixed-DPI behavior still need native acceptance.
• This release candidate is available through the Beta channel. Automatic updates never downgrade; select Beta in Preferences → Updates to receive previews.

Fixes

• Run cargo, rustc and other rustup tools in zsh when Neptune is launched from the AppImage. Terminals and the programs Neptune opens no longer inherit the AppImage's launcher variables or its bundled libraries.