agent-shell 0.63 updates

Summary

██ ██ ███████ ███ ██ ██████ ██████ ██ ██ ██ ███ ███ ██ ██ ██ ████ ██ ██ ██ ██ ██ ██ ██ ██ ████ ████ ███ █████ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ████ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ███████ ██ ████ ██████ ██████ ██ ██████ ██ ██ July 22, 2026 It's been a little over a month since the 0.55 update, but plenty has landed since. Let's go through the highlights as of v0.63. What's agent-shell? agent-shell is a native Emacs mode to interact with AI agents powered by ACP (Agent Client Protocol). Supported agents The roster continues to grow. This time we get two new agents supported: Additionally: Claude regains rendering thinking output, since its ACP server started omitting by default. Cursor now runs on the official Cursor CLI (agent acp). Note a recent CLI is required, as the acp subcommand was only added in 2026. Codex now uses @agentclientprotocol/codex-acp. Cline now accepts a default model and session mode via defcustoms (#693 by @nhojb). Goose no longer requires an OpenAI key by default (#711 by @hoyon). Qwen now has explicit support for OpenAI-compatible keys. Preferred agent agent-shell-preferred-agent-config gained finer control over agent selection. Set to an agent identifier to skip the picker entirely, or wrap it to keep the picker with a preselected default: (setq agent-shell-preferred-agent-config 'claude-code) always starts Claude, no prompt. (setq agent-shell-preferred-agent-config '(preselect . claude-code)) keeps the picker but preselects Claude as the default. Custom markdown renderers The new markdown renderer introduced in 0.55 is now extensible. Third-party packages can claim and render specific markdown constructs (source blocks, inline code ranges, etc) through agent-shell-markdown-render-functions. Thanks to Andrea Alberti for driving the first integration in agent-shell-math-renderer, which renders LaTeX math equations as SVGs. agent-shell faces If you've wanted more theming control over agent-shell buffers, this is now po...