FABRIC.md/ROADMAP.md/ttf_words.c: scope console REPL (4.4), obsolete M8, flip TTF to Cartesian y

FABRIC.md: renumber Artemis-last boundary 4.4 -> 4.5, add new 4.4 REPL item
(console visual design scoped this session -- CANVAS is one shared region
above the REPL strip, 640x480 scroll box centered within it, stroke font,
ANSI color, VM-identity + ACL-identity prompt segments, ~1000-line
scrollback), linked to repl-mockup.png.

ROADMAP.md: mark M8 section OBSOLETE -- replaced by FABRIC.md 4.4, kept for
history only.

ttf_words.c: TTF-TEXT's y argument now Cartesian (origin bottom-left of the
physical framebuffer, y increasing upward) instead of raw framebuffer
coordinates, translated once via fb_height() - y. Verified via amd64
screendump (logs/20260811-070418/), text renders right-side-up with
increasing y moving up the screen.

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

FABRIC.md

@@ -4367,8 +4367,9 @@ document and committing that amendment as its own item.*
   > note below: glyph rendering (stroke-based font capsules), not yet scoped.
 
   > **Sequencing noted 2026-08-07, not yet scoped:** keyboard input (4.3.5–4.3.5f) →
-  > glyph rendering (stroke-based font capsules) → REPL — in that order, before the 4.4
+  > glyph rendering (stroke-based font capsules) → REPL — in that order, before the 4.5
-  > Artemis boundary. Recorded so the order is not lost between sessions; neither glyph
+  > Artemis boundary (renumbered from 4.4, 2026-08-11 — REPL now has its own 4.4 section).
+  > Recorded so the order is not lost between sessions; neither glyph
   > rendering nor REPL has *Done when* criteria yet. Per §25.0 rule 2, each gets scoped in
   > detail at its own checkpoint, not now.
 
@@ -4973,11 +4974,23 @@ document and committing that amendment as its own item.*
   > `KEY-EVENT` (4.3.5f) isn't yet wired into the REPL's character source
   > (`console_getc()`), and `KEY`/`?TERMINAL` remain the dead stubs already noted above.
 
-  ⋯ *(4.3.x is open-ended — more items get appended here as Console work is scoped item by*
+  ⋯ *(4.3.x is open-ended — more items get appended here as framebuffer/keyboard Console work*
-  *item, developed on the fly per §25.0. 4.4 below is unaffected by anything added above*
+  *is scoped item by item, developed on the fly per §25.0. 4.4 below is a new, independent*
-  *this marker.)*
+  *section for the REPL itself — separate because the REPL is independent of the screen-output*
+  *and keyboard work above. 4.5 (renumbered from 4.4, 2026-08-11) is unaffected by anything*
+  *added above this marker.)*
 
-- [ ] **4.4 — Artemis last.** It works today; it is the thing that cannot be broken.
+- [ ] **4.4 — REPL.** *(Scoped 2026-08-11; independent of the 4.3.x framebuffer/keyboard work.*
+  *This item replaces `docs/lithosananke/ROADMAP.md`'s M8 section entirely — M8 is marked*
+  *OBSOLETE there as of 2026-08-11, kept for history only. Detailed spec and punch-list*
+  *sub-items to be written up in the same style as 4.3.x.)*
+  *Refs:* §25.5, §27.6.
+
+  Original visual mockup (Captain Bob, 2026-08-11): [`repl-mockup.png`](repl-mockup.png) —
+  CANVAS label, scrollable output region, separate REPL input strip with cursor at the
+  bottom. Source image for the CANVAS/REPL-strip geometry described below.
+
+- [ ] **4.5 — Artemis last.** It works today; it is the thing that cannot be broken.
   *Refs:* §10.
 
 ---
@@ -5484,7 +5497,8 @@ of slot.
 ### 27.6 Glyph rendering, UTF-8 Latin, capsule-loaded (4.3.6–4.3.6g)
 
 Scoped 2026-08-09, next after the 4.3.5f checkpoint, per the 2026-08-07 sequencing note
-(§25.5): keyboard input → glyph rendering → REPL, before the 4.4 Artemis boundary.
+(§25.5): keyboard input → glyph rendering → REPL, before the 4.5 Artemis boundary (renumbered
+from 4.4, 2026-08-11 — REPL now has its own 4.4 section).
 
 **Purpose and boundary.** Render text onto the CANVAS region of the Stadium UI (per the
 reviewed mockup: a fixed REPL strip at the bottom of the screen, a separate large CANVAS

capsules/BLOCK_MAP.md

@@ -1,5 +1,5 @@
 # Capsule Block Manifest — Auto-generated
-<!-- Generated by mkcapsule --manifest  2026-08-11T03:17:24Z -->
+<!-- Generated by mkcapsule --manifest  2026-08-11T11:02:46Z -->
 <!-- DO NOT EDIT — re-run mkcapsule --manifest to refresh.  -->
 <!-- Hand-written justifications and immutability notes live  -->
 <!-- in MANIFEST.md alongside this auto-generated index.      -->

docs/lithosananke/ROADMAP.md

@@ -17,7 +17,7 @@ M5  Timer               ██████████████████
 M6  Heap                ████████████████████ COMPLETE
 M7  VM Parity           ████████████████████ COMPLETE
 M7.1 Capsules           ████████████░░░░░░░░ DESIGN COMPLETE
-M8  REPL                ░░░░░░░░░░░░░░░░░░░░ PLANNED
+M8  REPL                ░░░░░░░░░░░░░░░░░░░░ OBSOLETE — see FABRIC.md §25.5 item 4.4
 M9  Block I/O           ░░░░░░░░░░░░░░░░░░░░ PLANNED
 M10 Networking          ░░░░░░░░░░░░░░░░░░░░ FUTURE
 ```
@@ -234,6 +234,11 @@ APIC Timer: started
 
 ## Phase 4: Interactive Forth (M8)
 
+> **⚠ OBSOLETE (2026-08-11).** This entire M8 section is superseded by
+> `FABRIC.md` §25.5 item 4.4 (REPL). The console/REPL design has moved past
+> what's scoped here — do not use this section as a source for REPL or
+> CANVAS design decisions. Kept in place for history only.
+
 ### M8: REPL + Interactive Forth
 
 **Status:** Scoped 2026-08-11 (this section). Substrate (interrupt-driven keyboard

src/word_source/ttf_words.c

@@ -94,7 +94,7 @@ static void ttf_word_text(VM *vm) {
     cell_t color, size, y, x, u, addr_cell;
     vaddr_t a;
     cell_t remaining;
-    uint32_t pen_x;
+    uint32_t pen_x, baseline_y;
     q48_16_t scale;
 
     if (vm->dsp < 5) {
@@ -123,6 +123,11 @@ static void ttf_word_text(VM *vm) {
     a = VM_ADDR(addr_cell);
     remaining = u;
     pen_x = (uint32_t) x;
+    /* Caller-facing (x,y) is Cartesian: origin at the bottom-left of the physical
+     * framebuffer, y increasing upward. fb_put_pixel() takes framebuffer coordinates
+     * (origin top-left, y increasing downward), so flip once here per-call rather
+     * than at every blit site. */
+    baseline_y = fb_height() - (uint32_t) y;
     scale = q48_div(q48_from_u64((uint32_t) size), q48_from_u64(g_ttf_font.units_per_em));
 
     while (remaining > 0) {
@@ -138,7 +143,7 @@ static void ttf_word_text(VM *vm) {
                 for (px = 0; px < bmp.width; px++) {
                     if (bmp.pixels[py * bmp.width + px]) {
                         fb_put_pixel(pen_x + px - TTF_CACHE_MARGIN,
-                                     (uint32_t) y + py - (uint32_t) size - TTF_CACHE_MARGIN,
+                                     baseline_y + py - (uint32_t) size - TTF_CACHE_MARGIN,
                                      (uint32_t) color);
                     }
                 }