Session::execute runs every command (UI, CLI, control channel, MCP, scripts; file import,
export and save are commands too) through guard::guarded, which catch_unwinds a panic that
escapes the command and returns EngineError::Other("command `x` failed with an internal error
(...); it was stopped and your project is still open"). Edits work on a copy of the project, so
a command that panics mid-edit leaves the project untouched. The desktop app also installs a
panic hook that logs every panic through the app logger (then runs the default hook).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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