FABRIC.md: item 4.5f -- reorder experiment confirms -O2 fixes the stall

Uncommitted experiment (code reverted after capture, per Captain Bob):
moved console_fb_init() before capsule_birth_mama() in kernel_main.c,
amd64 only. At -O2 the boot completes cleanly and reaches ok> well
inside a 300s bound, versus the indefinite stall previously seen at
-O0. Real cost: ~12x more heartbeat ticks during boot from the extra
framebuffer scroll volume -- not free, but not a hang.

Screendump confirms the actual point of 4.4g: the framebuffer now
carries the full HADES/ECW/Stadium/self-test transcript, not just the
small post-birth tail.

This informs 4.4g's open reorder decision, it doesn't make it -- 4.5f
stays unchecked (single-arch feasibility check only, not the three-arch
acceptance pass its own done-when requires).

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

FABRIC.md

@@ -5835,6 +5835,34 @@ document and committing that amendment as its own item.*
   > numbers still hold, or even remain comparable, once the kernel is built at a different
   > optimization level. Not scoped here — flagging so it isn't lost if 4.5 ever lands.
 
+  > **Experiment run, 2026-08-11 — uncommitted, reverted after capture, per Captain Bob's
+  > explicit instruction this was informational only (4.4g's reorder decision is still open,
+  > not made by this experiment).** `console_fb_init()`'s call site moved in `kernel_main.c`
+  > from after `capsule_birth_mama()` to just before it (same code, no logic changes). amd64,
+  > `-O2`: boot completed cleanly, reached `ok>` in well under the bounded 300s test window
+  > (previously stalled indefinitely at `-O0` — 12,700+ lines, still running after 3 minutes).
+  > Real cost, not zero: 2785 heartbeat ticks at 100 Hz vs. ~176–231 ticks on the
+  > non-reordered `-O2` boot from 4.5d/4.5e — the framebuffer-visible fleet-birth/self-test
+  > transcript adds substantial real time (screen-draw + scroll volume), it just no longer
+  > hangs. Screendump confirms the actual point: the framebuffer now shows the full
+  > HADES/ECW/Stadium/self-test transcript, not just the small post-birth tail —
+  > `evidence/amd64/qemu-screenshot-20260811-170329-4.5f-reorder-experiment.png`. Captured via
+  > a QEMU HMP monitor socket + `screendump` (the `qemu` Makefile target runs `-display none`
+  > with no monitor by default; this run added `-chardev socket,id=mon0,... -mon
+  > chardev=mon0,mode=readline` to get one). `Makefile.starkernel`'s amd64 `qemu` target
+  > deadline was temporarily dropped from 43200s to 300s for this one test run, then reverted;
+  > `kernel_main.c`'s reorder was reverted immediately after the screendump was captured. Not
+  > run on aarch64/riscv64 — this was a single-architecture feasibility check, not the item's
+  > own three-arch acceptance pass, which only applies once the reorder is actually decided
+  > and landed.
+  >
+  > **What this answers and doesn't:** confirms the stall was specifically an `-O0` cost
+  > problem, not a correctness bug in the reorder itself — `-O2` alone is sufficient to make
+  > it viable. Does **not** decide 4.4g's open question (whether the reorder is wanted); it
+  > only removes "it hangs" as a reason not to. The real-cost number above (≈12× more
+  > heartbeat ticks) is new information for that decision and wasn't available before this
+  > run.
+
 - [ ] **4.6 — Artemis last.** It works today; it is the thing that cannot be broken.
   *Refs:* §10.
 

experiments/bare_metal/latest/amd64.csv

@@ -72,39 +72,39 @@ tick_number,elapsed_ns,tick_interval_ns,cache_hits_delta,bucket_hits_delta,word_
 71,710000,10000,0,0,44,22,39,4096,1757,0,0,0,65536,0,0,65536,0,0
 72,720000,10000,0,0,130,24,27,4096,1757,0,0,0,65536,0,0,65536,0,0
 73,730000,10000,0,0,134,26,21,4096,1757,0,0,0,65536,0,0,65536,0,0
-1,10000,18446744073708831616,0,0,117,4,4,4096,0,0,4895412794951728796,5,65536,0,0,65536,0,0
+1,10000,18446744073708831616,0,0,117,4,4,4096,0,0,4895412794951728796,13,65536,0,0,65536,0,0
-2,20000,10000,0,0,78,10,7,4096,0,0,0,7,65536,0,0,65536,0,0
+2,20000,10000,0,0,78,10,7,4096,0,0,0,17,65536,0,0,65536,0,0
-3,30000,10000,0,0,101,13,7,4096,0,0,0,8,65536,0,0,65536,0,0
+3,30000,10000,0,0,101,13,7,4096,0,0,0,21,65536,0,0,65536,0,0
-4,40000,10000,0,0,63,19,8,4096,0,0,0,9,65536,0,0,65536,0,0
+4,40000,10000,0,0,63,19,8,4096,0,0,0,24,65536,0,0,65536,0,0
-5,50000,10000,0,0,92,25,8,4096,2,0,0,11,65536,0,0,65536,0,0
+5,50000,10000,0,0,92,25,8,4096,2,0,0,30,65536,0,0,65536,0,0
-6,60000,10000,0,0,64,27,8,4096,2,0,0,11,65536,0,0,65536,0,0
+6,60000,10000,0,0,64,27,8,4096,2,0,0,34,65536,0,0,65536,0,0
-7,70000,10000,0,0,228,32,8,4096,210,0,0,16,65536,0,0,65536,0,0
+7,70000,10000,0,0,228,32,8,4096,210,0,0,112,65536,0,0,65536,0,0
-8,80000,10000,0,0,256,34,9,4096,466,0,0,22,65536,0,0,65536,0,0
+8,80000,10000,0,0,256,34,9,4096,466,0,0,202,65536,0,0,65536,0,0
-9,90000,10000,0,0,256,36,10,4096,722,0,0,27,65536,0,0,65536,0,0
+9,90000,10000,0,0,256,36,10,4096,722,0,0,293,65536,0,0,65536,0,0
-10,100000,10000,0,0,256,36,11,4096,978,0,0,32,65536,0,0,65536,0,0
+10,100000,10000,0,0,256,36,11,4096,978,0,0,384,65536,0,0,65536,0,0
-11,110000,10000,0,0,256,36,11,4096,1234,0,0,38,65536,0,0,65536,0,0
+11,110000,10000,0,0,256,36,11,4096,1234,0,0,476,65536,0,0,65536,0,0
-12,120000,10000,0,0,256,36,12,4096,1490,0,0,43,65536,0,0,65536,0,0
+12,120000,10000,0,0,256,36,12,4096,1490,0,0,567,65536,0,0,65536,0,0
-13,130000,10000,0,0,256,37,12,4096,1746,0,0,48,65536,0,0,65536,0,0
+13,130000,10000,0,0,256,37,12,4096,1746,0,0,661,65536,0,0,65536,0,0
-14,140000,10000,0,0,230,39,12,4096,1949,0,0,53,65536,0,0,65536,0,0
+14,140000,10000,0,0,230,39,12,4096,1949,0,0,737,65536,0,0,65536,0,0
-15,150000,10000,0,0,256,39,13,4096,2204,0,0,58,65536,0,0,65536,0,0
+15,150000,10000,0,0,256,39,13,4096,2204,0,0,826,65536,0,0,65536,0,0
-16,160000,10000,0,0,256,39,14,4096,2459,0,0,64,65536,0,0,65536,0,0
+16,160000,10000,0,0,256,39,14,4096,2459,0,0,922,65536,0,0,65536,0,0
-17,170000,10000,0,0,256,39,15,4096,2713,0,0,69,65536,0,0,65536,0,0
+17,170000,10000,0,0,256,39,15,4096,2713,0,0,1013,65536,0,0,65536,0,0
-18,180000,10000,0,0,256,39,15,4096,2969,0,0,74,65536,0,0,65536,0,0
+18,180000,10000,0,0,256,39,15,4096,2969,0,0,1106,65536,0,0,65536,0,0
-19,190000,10000,0,0,256,39,16,4096,3224,0,0,80,65536,0,1,65536,0,0
+19,190000,10000,0,0,256,39,16,4096,3224,0,0,1198,65536,0,1,65536,0,0
-20,200000,10000,0,0,256,41,17,4096,3480,0,0,85,65536,0,1,65536,0,0
+20,200000,10000,0,0,256,41,17,4096,3480,0,0,1290,65536,0,1,65536,0,0
-21,210000,10000,0,0,256,41,17,4096,3736,0,0,90,65536,0,1,65536,0,0
+21,210000,10000,0,0,256,41,17,4096,3736,0,0,1382,65536,0,1,65536,0,0
-22,220000,10000,0,0,256,41,18,4096,3992,0,0,95,65536,0,1,65536,0,0
+22,220000,10000,0,0,256,41,18,4096,3992,0,0,1473,65536,0,1,65536,0,0
-23,230000,10000,0,0,256,41,19,4096,4096,0,0,102,65536,0,1,65536,0,0
+23,230000,10000,0,0,256,41,19,4096,4096,0,0,1566,65536,0,1,65536,0,0
-24,240000,10000,0,0,256,41,20,4096,4096,0,0,107,65536,0,1,65536,0,0
+24,240000,10000,0,0,256,41,20,4096,4096,0,0,1659,65536,0,1,65536,0,0
-25,250000,10000,0,0,256,43,20,2048,2048,0,0,113,65536,0,1,65536,0,0
+25,250000,10000,0,0,256,43,20,2048,2048,0,0,1751,65536,0,1,65536,0,0
-26,260000,10000,0,0,256,45,21,2048,2048,0,0,118,65536,0,1,65536,0,0
+26,260000,10000,0,0,256,45,21,2048,2048,0,0,1843,65536,0,1,65536,0,0
-27,270000,10000,0,0,256,45,22,1024,1024,0,0,123,65536,0,1,65536,0,0
+27,270000,10000,0,0,256,45,22,1024,1024,0,0,1934,65536,0,1,65536,0,0
-28,280000,10000,0,0,256,45,23,1024,1024,0,0,129,65536,0,1,65536,0,0
+28,280000,10000,0,0,256,45,23,1024,1024,0,0,2026,65536,0,1,65536,0,0
-29,290000,10000,0,0,256,45,24,512,512,0,0,134,65536,0,1,65536,0,0
+29,290000,10000,0,0,256,45,24,512,512,0,0,2119,65536,0,1,65536,0,0
-30,300000,10000,0,0,256,45,24,512,512,0,0,139,65536,0,1,65536,0,0
+30,300000,10000,0,0,256,45,24,512,512,0,0,2210,65536,0,1,65536,0,0
-31,310000,10000,0,0,256,45,25,256,256,0,0,145,65536,0,1,65536,0,0
+31,310000,10000,0,0,256,45,25,256,256,0,0,2302,65536,0,1,65536,0,0
-32,320000,10000,0,0,255,45,26,256,256,0,0,150,65536,0,1,65536,0,0
+32,320000,10000,0,0,255,45,26,256,256,0,0,2391,65536,0,1,65536,0,0
-33,330000,10000,0,0,256,45,27,256,256,0,0,155,65536,0,1,65536,0,0
+33,330000,10000,0,0,256,45,27,256,256,0,0,2483,65536,0,1,65536,0,0
-34,340000,10000,0,0,256,45,27,256,256,0,0,161,65536,0,1,65536,0,0
+34,340000,10000,0,0,256,45,27,256,256,0,0,2576,65536,0,1,65536,0,0
-35,350000,10000,0,0,256,45,28,256,256,0,0,166,65536,0,1,65536,0,0
+35,350000,10000,0,0,256,45,28,256,256,0,0,2667,65536,0,1,65536,0,0
-36,360000,10000,0,0,256,45,29,256,256,0,0,172,65536,0,1,65536,0,0
+36,360000,10000,0,0,256,45,29,256,256,0,0,2763,65536,0,1,65536,0,0

experiments/bare_metal/runs/doe-amd64-20260811-170209.csv

@@ -0,0 +1,110 @@
+tick_number,elapsed_ns,tick_interval_ns,cache_hits_delta,bucket_hits_delta,word_executions_delta,hot_word_count,avg_word_heat_q48,window_width,actual_window_size,predicted_label_hits,jitter_bits,apic_ticks,time_trust_q48,variance_q48,vm_call_depth_max,hera_heat_q48,hermes_heat_q48,artemis_heat_q48
+1,10000,10000,0,0,183,4,45,731,731,0,0,0,65536,0,0,65536,0,0
+2,20000,10000,0,0,173,5,44,582,582,0,0,0,65536,0,0,65536,0,0
+3,30000,10000,0,0,184,6,60,582,582,0,0,0,65536,0,0,65536,0,0
+4,40000,10000,0,0,174,8,71,4096,0,0,0,0,65536,0,0,65536,0,0
+5,50000,10000,0,0,150,9,78,582,582,0,0,0,65536,0,0,65536,0,0
+6,60000,10000,0,0,159,11,73,4096,0,0,0,0,65536,0,0,65536,0,0
+7,70000,10000,0,0,188,15,71,685,685,0,0,0,65536,0,0,65536,0,0
+8,80000,10000,0,0,214,16,83,685,685,0,0,0,65536,0,0,65536,0,0
+9,90000,10000,0,0,216,19,82,4096,0,0,0,0,65536,0,0,65536,0,0
+10,100000,10000,0,0,222,21,84,567,567,0,0,0,65536,0,0,65536,0,0
+11,110000,10000,0,0,207,23,86,731,731,0,0,0,65536,0,0,65536,0,0
+12,120000,10000,0,0,189,26,83,4096,0,0,0,0,65536,0,0,65536,0,0
+13,130000,10000,0,0,221,28,80,731,731,0,0,0,65536,0,0,65536,0,0
+14,140000,10000,0,0,204,29,83,685,685,0,0,0,65536,0,0,65536,0,0
+15,150000,10000,0,0,203,30,82,731,731,0,0,0,65536,0,0,65536,0,0
+16,160000,10000,0,0,201,32,83,567,567,0,0,0,65536,0,0,65536,0,0
+17,170000,10000,0,0,190,34,86,731,731,0,0,0,65536,0,0,65536,0,0
+18,180000,10000,0,0,170,35,73,582,582,0,0,0,65536,0,0,65536,0,0
+19,190000,10000,0,0,154,35,40,731,731,0,0,0,65536,0,0,65536,0,0
+20,200000,10000,0,0,154,35,38,567,567,0,0,0,65536,0,0,65536,0,0
+21,210000,10000,0,0,153,38,37,4096,0,0,0,0,65536,0,0,65536,0,0
+22,220000,10000,0,0,167,38,38,582,582,0,0,0,65536,0,0,65536,0,0
+23,230000,10000,0,0,176,12,40,685,685,0,0,0,65536,0,0,65536,0,0
+24,240000,10000,0,0,175,10,25,731,731,0,0,0,65536,0,0,65536,0,0
+25,250000,10000,0,0,196,11,23,731,731,0,0,0,65536,0,0,65536,0,0
+26,260000,10000,0,0,192,14,24,4096,0,0,0,0,65536,0,0,65536,0,0
+27,270000,10000,0,0,158,16,30,685,685,0,0,0,65536,0,0,65536,0,0
+28,280000,10000,0,0,158,17,23,4096,0,0,0,0,65536,0,0,65536,0,0
+29,290000,10000,0,0,164,17,27,4096,0,0,0,0,65536,0,0,65536,0,0
+30,300000,10000,0,0,154,18,26,685,685,0,0,0,65536,0,0,65536,0,0
+31,310000,10000,0,0,172,6,25,582,582,0,0,0,65536,0,0,65536,0,0
+32,320000,10000,0,0,180,9,22,567,567,0,0,0,65536,0,0,65536,0,0
+33,330000,10000,0,0,145,11,29,567,567,0,0,0,65536,0,0,65536,0,0
+34,340000,10000,0,0,203,14,30,582,582,0,0,0,65536,0,0,65536,0,0
+35,350000,10000,0,0,154,16,36,731,731,0,0,0,65536,0,0,65536,0,0
+36,360000,10000,0,0,144,18,32,4096,0,0,0,0,65536,0,0,65536,0,0
+37,370000,10000,0,0,144,18,29,4096,0,0,0,0,65536,0,0,65536,0,0
+38,380000,10000,0,0,132,18,28,4096,0,0,0,0,65536,0,0,65536,0,0
+39,390000,10000,0,0,180,18,24,4096,0,0,0,0,65536,0,0,65536,0,0
+40,400000,10000,0,0,220,23,20,4096,0,0,0,0,65536,0,0,65536,0,0
+41,410000,10000,0,0,215,25,19,4096,24,0,0,0,65536,0,0,65536,0,0
+42,420000,10000,0,0,208,32,20,4096,24,0,0,0,65536,0,0,65536,0,0
+43,430000,10000,0,0,177,36,19,4096,24,0,0,0,65536,0,0,65536,0,0
+44,440000,10000,0,0,199,42,20,4096,24,0,0,0,65536,0,0,65536,0,0
+45,450000,10000,0,0,223,47,19,4096,30,0,0,0,65536,0,0,65536,0,0
+46,460000,10000,0,0,202,50,17,4096,67,0,0,0,65536,0,0,65536,0,0
+47,470000,10000,0,0,218,57,18,4096,198,0,0,0,65536,0,0,65536,0,0
+48,480000,10000,0,0,221,60,20,4096,350,0,0,0,65536,0,0,65536,0,0
+49,490000,10000,0,0,225,66,20,4096,528,0,0,0,65536,0,0,65536,0,0
+50,500000,10000,0,0,214,69,21,4096,694,0,0,0,65536,0,0,65536,0,0
+51,510000,10000,0,0,227,71,23,4096,883,0,0,0,65536,0,0,65536,0,0
+52,520000,10000,0,0,208,71,23,4096,1043,0,0,0,65536,0,0,65536,0,0
+53,530000,10000,0,0,207,71,25,4096,1202,0,0,0,65536,0,0,65536,0,0
+54,540000,10000,0,0,200,71,26,4096,1319,0,0,0,65536,0,0,65536,0,0
+55,550000,10000,0,0,205,72,27,4096,1464,0,0,0,65536,0,0,65536,0,0
+56,560000,10000,0,0,211,73,27,4096,1620,0,0,0,65536,0,0,65536,0,0
+57,570000,10000,0,0,193,80,28,4096,1712,0,0,0,65536,0,0,65536,0,0
+58,580000,10000,0,0,185,4,61,4096,1757,0,0,0,65536,0,0,65536,0,0
+59,590000,10000,0,0,81,7,32,4096,1757,0,0,0,65536,0,0,65536,0,0
+60,600000,10000,0,0,52,10,28,4096,1757,0,0,0,65536,0,0,65536,0,0
+61,610000,10000,0,0,63,17,25,4096,1757,0,0,0,65536,0,0,65536,0,0
+62,620000,10000,0,0,85,19,24,4096,1757,0,0,0,65536,0,0,65536,0,0
+63,630000,10000,0,0,68,20,23,4096,1757,0,0,0,65536,0,0,65536,0,0
+64,640000,10000,0,0,39,20,23,4096,1757,0,0,0,65536,0,0,65536,0,0
+65,650000,10000,0,0,45,20,25,4096,1757,0,0,0,65536,0,0,65536,0,0
+66,660000,10000,0,0,42,20,29,4096,1757,0,0,0,65536,0,0,65536,0,0
+67,670000,10000,0,0,47,20,31,4096,1757,0,0,0,65536,0,0,65536,0,0
+68,680000,10000,0,0,43,20,34,4096,1757,0,0,0,65536,0,0,65536,0,0
+69,690000,10000,0,0,48,20,35,4096,1757,0,0,0,65536,0,0,65536,0,0
+70,700000,10000,0,0,48,21,38,4096,1757,0,0,0,65536,0,0,65536,0,0
+71,710000,10000,0,0,44,22,39,4096,1757,0,0,0,65536,0,0,65536,0,0
+72,720000,10000,0,0,130,24,27,4096,1757,0,0,0,65536,0,0,65536,0,0
+73,730000,10000,0,0,134,26,21,4096,1757,0,0,0,65536,0,0,65536,0,0
+1,10000,18446744073708831616,0,0,117,4,4,4096,0,0,4895412794951728796,13,65536,0,0,65536,0,0
+2,20000,10000,0,0,78,10,7,4096,0,0,0,17,65536,0,0,65536,0,0
+3,30000,10000,0,0,101,13,7,4096,0,0,0,21,65536,0,0,65536,0,0
+4,40000,10000,0,0,63,19,8,4096,0,0,0,24,65536,0,0,65536,0,0
+5,50000,10000,0,0,92,25,8,4096,2,0,0,30,65536,0,0,65536,0,0
+6,60000,10000,0,0,64,27,8,4096,2,0,0,34,65536,0,0,65536,0,0
+7,70000,10000,0,0,228,32,8,4096,210,0,0,112,65536,0,0,65536,0,0
+8,80000,10000,0,0,256,34,9,4096,466,0,0,202,65536,0,0,65536,0,0
+9,90000,10000,0,0,256,36,10,4096,722,0,0,293,65536,0,0,65536,0,0
+10,100000,10000,0,0,256,36,11,4096,978,0,0,384,65536,0,0,65536,0,0
+11,110000,10000,0,0,256,36,11,4096,1234,0,0,476,65536,0,0,65536,0,0
+12,120000,10000,0,0,256,36,12,4096,1490,0,0,567,65536,0,0,65536,0,0
+13,130000,10000,0,0,256,37,12,4096,1746,0,0,661,65536,0,0,65536,0,0
+14,140000,10000,0,0,230,39,12,4096,1949,0,0,737,65536,0,0,65536,0,0
+15,150000,10000,0,0,256,39,13,4096,2204,0,0,826,65536,0,0,65536,0,0
+16,160000,10000,0,0,256,39,14,4096,2459,0,0,922,65536,0,0,65536,0,0
+17,170000,10000,0,0,256,39,15,4096,2713,0,0,1013,65536,0,0,65536,0,0
+18,180000,10000,0,0,256,39,15,4096,2969,0,0,1106,65536,0,0,65536,0,0
+19,190000,10000,0,0,256,39,16,4096,3224,0,0,1198,65536,0,1,65536,0,0
+20,200000,10000,0,0,256,41,17,4096,3480,0,0,1290,65536,0,1,65536,0,0
+21,210000,10000,0,0,256,41,17,4096,3736,0,0,1382,65536,0,1,65536,0,0
+22,220000,10000,0,0,256,41,18,4096,3992,0,0,1473,65536,0,1,65536,0,0
+23,230000,10000,0,0,256,41,19,4096,4096,0,0,1566,65536,0,1,65536,0,0
+24,240000,10000,0,0,256,41,20,4096,4096,0,0,1659,65536,0,1,65536,0,0
+25,250000,10000,0,0,256,43,20,2048,2048,0,0,1751,65536,0,1,65536,0,0
+26,260000,10000,0,0,256,45,21,2048,2048,0,0,1843,65536,0,1,65536,0,0
+27,270000,10000,0,0,256,45,22,1024,1024,0,0,1934,65536,0,1,65536,0,0
+28,280000,10000,0,0,256,45,23,1024,1024,0,0,2026,65536,0,1,65536,0,0
+29,290000,10000,0,0,256,45,24,512,512,0,0,2119,65536,0,1,65536,0,0
+30,300000,10000,0,0,256,45,24,512,512,0,0,2210,65536,0,1,65536,0,0
+31,310000,10000,0,0,256,45,25,256,256,0,0,2302,65536,0,1,65536,0,0
+32,320000,10000,0,0,255,45,26,256,256,0,0,2391,65536,0,1,65536,0,0
+33,330000,10000,0,0,256,45,27,256,256,0,0,2483,65536,0,1,65536,0,0
+34,340000,10000,0,0,256,45,27,256,256,0,0,2576,65536,0,1,65536,0,0
+35,350000,10000,0,0,256,45,28,256,256,0,0,2667,65536,0,1,65536,0,0
+36,360000,10000,0,0,256,45,29,256,256,0,0,2763,65536,0,1,65536,0,0