What the app does

Helicon's capabilities come from reading the Muse Code Session Protocol directly: session history with resume, inline diffs, an approval queue mapped one to one, cost at published per token rates, projects grouped by working directory, a file viewer, subagent and workflow controls, and full keyboard operation.

Last updated 17 October 2026

One page per capability, written for the thing you would actually search for. Each was tested with Muse Code 1.4.14 on Windows, macOS and Linux.

• Session history and resumeEvery Muse Code session, grouped by project, with full history and one click resume. Sessions started in the muse terminal TUI are discovered and resumable too.
• Inline diffsEvery file the agent edits lands as a diff at the point in the conversation where it happened, with the touched file open in a viewer beside the thread.
• ApprovalsEvery approval Muse Code raises shows up in Helicon as it arrives. onRequest, promptUnmatched and denyUnmatched map one to one, and allow all is opt in.
• Cost at API ratesSee what every Muse Code thread would have cost at published per token rates, broken down by day, by model and by thread. A meter reading on your subscription, not a bill.
• Plan meterHelicon shows the Muse Code 5 hour window and weekly cap exactly as the CLI reports them, in the sidebar and on the usage page, so a limit never arrives as a surprise.
• Projects and worktreesHelicon groups every Muse Code thread under the directory the agent worked in, isolated git worktrees included, so parallel work across repositories has one place to live.
• Keyboard and paletteA command palette, slash commands and a model and reasoning effort picker. Every project, session and action in Helicon is reachable without the mouse.
• File viewerBrowse the project, read highlighted source, preview and edit Markdown, and view images, video and PDFs. Any path Muse Code mentions opens beside the conversation.
• Remote daemon and web UIThe same Helicon UI ships as a web app pointed at a daemon on another machine, so a laptop can supervise Muse Code running on a workstation or a server.
• Subagents and workflowsParallel subagents and workflow runs are hard to follow in a terminal. Helicon shows them as structure: what is running, what finished, and what you can cancel or retry.
• GoalsSet, pause, resume, change and clear a Muse Code goal from the goal panel or the composer, without dropping back into the terminal to retype a slash command.
• Background workSend a running tool call to the background, stop one, or stop them all. Cancel a workflow run, or skip and retry its agents, without abandoning the thread.