Agent Canvas 0.8.0

The first open-source release, and the first one for macOS and Linux.

Added

• macOS and Linux builds (.dmg / .zip for Apple Silicon and Intel, .AppImage / .deb), tested in CI on every push.
• Pipelines, much more capable
  • Parallel steps: run several agents at once and wait for all of them. The next step gets one name: summary line per agent in {{prev}}.
  • Loops: "if the summary contains X, go back to step N, at most M times". A typical use: a reviewer that rejects sends the work back to the dev.
  • Human approval step: the pipeline pauses until you allow it, in the app or from your phone.
  • Per-step timeout, a pipeline budget in US$, and a list of recent runs (state, rounds, duration, spend).
  • A restore point is saved before every run.
• Cost and budgets
  • Estimated cost per agent, worked out from the model in each CLI's log (Claude Code, Codex, Gemini CLI).
  • A workspace budget: when it is reached, the workspace's agents are interrupted and its pipelines stop.
  • A spend per day chart covering 14 days.
  • An editable price table.
• Agent history: a searchable timeline for each agent, covering what you typed, what pipelines and routines asked, messages between agents and the canvas_done summaries.
• Restore points: named snapshots of every workspace, made by you or automatically. Restoring keeps running the terminals that exist in both versions.
• System notifications: an agent finished (with its summary), is waiting for you, a pipeline ended, or a budget was reached. Clicking one brings the app forward and shows the terminal.
• Copy diagnostics (Settings → Diagnostics): versions, agent checks and the recent error log, ready for a bug report.

Changed

• Settings sections are listed in a sidebar, so every section is visible.
• The sidebar footer opens the agent history. New workspaces are created from the + at the top.
• Updates are now published in this repository.

Fixed

• Gemini CLI could open the app 3–4 times on start: its MCP server launch dropped ELECTRON_RUN_AS_NODE. The app now also allows a single instance per profile.
• The canvas command was not found inside terminals on Windows (Path vs PATH).
• "Object has been destroyed" error dialog when closing the window.
• Closing the app or a terminal left agents and their child processes (MCP servers, dev servers) running. The whole process tree is now ended.
• macOS: terminals did not start (node-pty's spawn-helper without the execute bit).
• macOS/Linux: agent CLIs installed through Homebrew, nvm or ~/.local/bin were not found when the app was opened from the Dock or a menu. The login shell's PATH is now loaded.
• An unexpected error now shows a small notice and is written to logs/main.log, instead of a blocking dialog.

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Download: pick the file for your system below, or use the download page. Installers are not code-signed yet: see install notes.