The three high-signal Concrete channels used for status and intent.

Shared data and diagram tone language for generated output and dense tables.

Command and token intent language for compact interactive lists.

Field-level validation state used by forms, settings rows, and summaries.

Lifecycle state for uploaded file and media rows.

Data-rendering state shared by tables, charts, metrics, and generated panels.

Agent message stream state shared by transcript, reasoning, and tool-call surfaces.

Tool execution lifecycle state used by tool-call displays.

Interface hierarchy language for command priority without visual override props.

Composition density language for compact product and lower-density reading modes.