# The terminal face

The kernel's honest reading in a terminal: facts and actions as text,
canvases as half-block cells. No widgets, no framework - a `Screen` of
cells, diffed and flushed.

## Entering

`mrlycli tui`, or bare `mrlycli` on a terminal. Piped stdin still gets the
line repl, so scripts and tests are untouched.

## Reading

Title bar (emoji, title, beat verb right-aligned), route params, the
canvas from the `frame` fact, the remaining state keys one per row, notices,
the action bar, then the status row.

## Keys

- arrows or `wasd` - the focused app's manifest keymap (`keys`), if bound
- `1`-`9` - the nth action; argless verbs fire, the rest prefill the line
- `:` - type a verb and optional JSON args, enter acts, esc cancels
- `esc` - back to the menu, `q` or `ctrl-c` - quit

## Laws

- Redraw iff the kernel tick advanced, the terminal resized, or the command
  line changed. The kernel decides what changed; the shell only asks.
- The shell owns the clock: a 125ms beat drives `view.beat`, never the app.
- Cells are diffed at the transport - only changed runs move the cursor,
  and style bytes ride only on style changes.
- Render is total: any app, any state, any size down to 20x6.
- `libc` is rented for termios, ioctl and isatty (DEPS.md: own the face,
  rent the platform). VT escape codes are a dead spec, so they are ours.