Features

Each page describes an area of the terminal, with platform differences and operating limits beside the feature. The platform comparison brings those differences together.

The terminal

Rendering and performanceOne core builds every frame; Metal, Vulkan and WebGL draw it. Measured costs, damage tracking, synchronized output.

TypographyReal fonts and fallback routing, ligatures, variable weight, proportional and sized text, double height, skip-ink.

ImagesThree inline image protocols decoded in Core, with bounded memory.

Rich textOSC 7404 places styled text in several families and sizes into a rectangle of cells.

Tektronix graphicsA 4010/4014 vector terminal inside the terminal, with an optional glow.

Shell integrationPrompt marks, exit codes, working directory and host, for zsh, bash and fish.

Sessions

Multiplexer and sessionsThe host owns windows, tabs and panes; clients come and go. Named sessions, reattach, host update.

RemoteSSH bootstrap with a QUIC data plane, host install and update, the iPhone and iPad client.

Agents and ubqA command line and an MCP server over the same sessions you see, with consent, tokens and an audit log.

Security and permissionsEvery effect that leaves the terminal is a named capability, checked by who drove it.

Using it

ConfigurationOne TOML file, live reload on macOS, 35 themes, key bindings, the command palette.

AccessibilityVoiceOver reading, colour-vision palettes, text contrast, reduced motion.