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Surfaces read a view that misses a convention as something else without
a word: a number label makes a list a table, a text tone disappears, a
list never shows its other columns, X_focus without a table becomes a
field, a second text input has nowhere to type. vega check MODULE names
each such place (the view or input and what the surface does instead)
and exits 1; the rules sit next to the code that reads the screen.
The checks build a spec that misses eight conventions and expect exactly
its nine findings, and none in the examples.
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Vega reads a verified Pure module by convention: a table view with a
label column is a list (with optional badge, detail and tone), any other
table is a table, <table>_focus is its focused row, a title view is the
title and other views are fields. lib/vega.aup gives aup apps the tones,
which say what a row means; each surface decides how it looks or sounds.
vega tui draws the screen in a terminal, keeps the focused row in view
and evaluates only the cells on screen; vega cli prints plain lines for
pipes; vega say speaks the screen and each focus change as sentences.
Display width handles Hangul, CJK, emoji, combining marks and controls.
tests/check.py compares the CLI and NUI output with a reference model of
examples/todo.aup line for line, checks 9,600 TUI frames for scrolling,
focus, badge alignment and the number of cells evaluated, drives the
interactive TUI on a pseudo-terminal, and runs every aup example on every
surface.
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