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Devin CLI: 2026.4.9-0

Product: Devin CLI

Added structured form-based input support when connected to ACP clients that advertise elicitation capability.

What changed

  • Added structured form-based input support when connected to ACP clients that advertise elicitation capability.
  • Added inference tool name metadata to ACP tool call events so ACP clients can make per-tool presentation decisions (for example, hiding the arguments panel for internal tools).
  • Enabled the devin acp subcommand on stable and next, so any released build of Devin for Terminal can be launched as an Agent Client Protocol server by ACP-aware editors.
  • Added /ask, /compact, /context, and /undo-add-dir slash commands for ACP clients (e.g. JetBrains).
  • Expanded /help output in ACP sessions to list all built-in commands and discovered skills.
  • Show subagent activity and lifecycle events in the Windsurf UI.
  • Made the “Mode:” and “Model:” labels in the footer clickable to open their selector menus
  • Added mouse support to selector menus: click to select, scroll wheel to navigate, hover to highlight

Source

Why it matters

If you use Devin CLI, skim the official notes above and decide what to try in your next session. Tag the right surface — Cloud vs Desktop vs CLI — before you change workflows.

Fan coverage from Devin Central — not an official Cognition announcement. Devin is a trademark of Cognition.