Robert Allan JamesandClaude Sonnet 5 91742e02f4 FABRIC.md item 4.4x: split the REPL prompt into its own bottom strip ...

Scope expanded from pure CANVAS-rectangle arithmetic (as originally
scoped) to also splitting the REPL prompt/input line out of the
scrollback box into an independent single-line strip, per Captain Bob's
explicit fold-in after the gap was reported (§25.0 rule 3) rather than
silently expanded.

vt100.c: VT100_BOX_ORIGIN_X/Y are no longer hardcoded per-arch literals --
both are now derived from fb_width()/fb_height() at vt100_enable_ttf()
time. New vt100_strip_draw() renders the bottom strip (gray border lines,
bright-white text) directly via the existing ttf_draw_glyph_cell()
rasterizer, independent of the box's own grid/cursor state. Border lines
are drawn after the glyph loop so an oversized cell can only be clipped
by them, never erase them.

console.c/console.h: console_fb_strip_draw() thin wrapper, matching the
existing console_fb_enable_ttf()/console_fb_scroll_*() pattern.

repl.c: builds a plain-text "[VMName] ok> <input>" mirror in
g_strip_prompt/strip_refresh(), refreshed on every keystroke (including
backspace) from sk_readline() -- already wired for item 4.4v, since
keyboard-typed characters will flow through the same console_getc() path
once that lands. Also widened sk_repl_step()/sk_repl_run()'s local input
buffer from a second, smaller 256-byte buffer to INPUT_BUFFER_SIZE
(1025), per 4.4w's decision.

Verified: three-arch clean QEMU boot + logs, amd64 screendump showing
the box and strip as two visually distinct regions with no visible
glyph/border clipping.

Punch list §25 item 4.4x complete.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

2026-08-12 14:59:07 -04:00

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