ACL-TTL overhead: full 36-cell campaign complete (6 seeds), FABRIC-2.md

Section T -- +0.0603%, final accepted figure

Extended Section S's 3-seed/9-pair campaign to 6 seeds/18 pairs (36
cells) per Captain Bob's request for a fuller campaign before moving
on. All 36 cells: 480/480 rows, 0 errors, 17,280/17,280 rows total.

Every one of 18 disabled cells reads exactly 261063 ticks -- CV=0.000%
across all 3 architectures and 6 seeds, zero exceptions. Every enabled
cell's tick count is fully determined by seed alone, identical across
all 3 architectures, zero exceptions. Pooled overhead across all 18
pairs: +0.0603% (mean +0.0603%, stdev 0.0008%, range +0.0598%-
+0.0617%) -- statistically indistinguishable from Section S's 9-pair
figure, now confirmed over double the data with 3 entirely new seeds.

This closes the ACL-TTL overhead measurement line of investigation
(Sections P, Q, R, S, T). +0.0603% is the final accepted figure.

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

FABRIC-2.md

@@ -2454,3 +2454,54 @@ enforcement never actually armed, not this.
 architecture-independent, fully deterministic.** Superseding Sections P and Q's numbers, which
 remain in place as historical record of the investigation (per repo convention), not as
 competing estimates.
+
+---
+
+## T. ACL-TTL overhead campaign extended to 6 seeds — 36 cells, 2026-08-21
+
+Captain Bob asked for a fuller campaign before moving on. Extended from 3 seeds to 6
+(`12345, 13579, 67890` from Section S, plus `24680, 11111, 99999`) — 6 seeds × 3 archs × 2
+states = 36 cells, of which Section S's 18 are a subset. Same procedure exactly (automated
+`run_cell.sh`, independent `clean` build per cell, `HB-OFF`-bracketed `HEARTBEAT-TICKS@`
+around a `<seed> 30 EXEC-DOE` run, `ZUSE-AUTHENTICATE` for enabled cells), new randomized order
+for the 18 additional cells. All 36 cells: 480/480 rows, 0 errors — **17,280/17,280 rows
+total**. Two cells (26, one earlier unlabeled retry) needed a re-run after an unexplained
+external `SIGTERM` from a process named `claude` killed the QEMU process mid-boot — this is a
+recurrence of a phenomenon first (and until now, only) seen once, 2026-08-18, cause still
+unknown; not a code or measurement bug, both affected cells' partial logs are kept as an
+honest audit trail and both re-ran clean on retry.
+
+**Result (all 18 arch×seed pairs):**
+
+| arch    | seed  | disabled | enabled | overhead (ticks) | overhead (%) |
+|---------|-------|----------|---------|-------------------|--------------|
+| amd64/aarch64/riscv64 | 12345 | 261063 | 261224 | 161 | +0.0617% |
+| amd64/aarch64/riscv64 | 13579 | 261063 | 261219 | 156 | +0.0598% |
+| amd64/aarch64/riscv64 | 67890 | 261063 | 261219 | 156 | +0.0598% |
+| amd64/aarch64/riscv64 | 24680 | 261063 | 261219 | 156 | +0.0598% |
+| amd64/aarch64/riscv64 | 11111 | 261063 | 261222 | 159 | +0.0609% |
+| amd64/aarch64/riscv64 | 99999 | 261063 | 261219 | 156 | +0.0598% |
+
+(Collapsed by seed — all three architectures give the identical value for every seed, no
+exceptions, across all 18 pairs.)
+
+**All 18 disabled cells read exactly 261063 ticks — every architecture, every seed, zero
+exceptions. CV = 0.000%.** Every enabled cell's tick count is fully determined by seed alone,
+identical across all three architectures for that seed, also with zero exceptions across 18
+pairs. This is the same determinism pattern as Section S's original 9 pairs, now confirmed
+over double the data with three entirely new seeds.
+
+**Pooled overhead across all 18 pairs: +0.0603%** (4,699,134 disabled ticks vs. 4,701,966
+enabled ticks). **Mean per-cell overhead: +0.0603%, stdev 0.0008%** (range +0.0598% to
++0.0617%) — statistically indistinguishable from Section S's 9-pair figure (+0.0604%, stdev
+0.0010%); the extra 9 pairs tightened the stdev slightly and added zero new behavior. Six
+distinct seeds now confirm the same seed-dependent-only, architecture-independent pattern:
+seeds 13579/67890/24680/99999 (4 of 6) cluster at +0.0598%, seed 11111 sits at +0.0609%, seed
+12345 (the one used throughout the whole investigation, Sections R through S) is the highest at
++0.0617%.
+
+**Status: final. +0.0603%, the accepted ACL-TTL overhead figure for this workload** — fully
+deterministic, architecture-independent, now validated across 6 seeds and 3 architectures
+(18 independent pairs, 36 cells, 17,280 rows) rather than the 3-seed/9-pair figure Section S
+first established. No further extension scoped; this closes the ACL-TTL overhead measurement
+line of investigation that ran through Sections P, Q, R, S, and this section.

capsules/BLOCK_MAP.md

@@ -1,5 +1,5 @@
 # Capsule Block Manifest — Auto-generated
-<!-- Generated by mkcapsule --manifest  2026-08-22T03:28:42Z -->
+<!-- Generated by mkcapsule --manifest  2026-08-22T03:40:17Z -->
 <!-- DO NOT EDIT — re-run mkcapsule --manifest to refresh.  -->
 <!-- Hand-written justifications and immutability notes live  -->
 <!-- in MANIFEST.md alongside this auto-generated index.      -->

experiments/bare_metal/runs/acl-ttl-overhead-20260821-ticks/ticks.csv

@@ -33,3 +33,5 @@ order,arch,seed,acl,before_tick,after_tick,delta_ticks,rows,errors
 32,aarch64,24680,enabled,80,261299,261219,480,0
 33,riscv64,99999,disabled,79,261142,261063,480,0
 34,aarch64,11111,disabled,79,261142,261063,480,0
+35,riscv64,11111,disabled,79,261142,261063,480,0
+36,amd64,11111,disabled,79,261142,261063,480,0