per-isa-doe.4th: fix PER-ISA-NREPS, make seed/reps VARIABLEs, add common DOE word

PER-ISA-NREPS was 18, inherited unchanged from local master, but every doc
comment (this file's own header, doe_region.h's own design comment) assumes
N=3 reps/cell -- 18 trials/ISA, 54 total across 3 ISAs. With the actual
constant at 18, MU-EXEC-CAMPAIGN's own math (n-reps * MU-N-CFG, MU-N-CFG=6)
produced 108 trials/ISA, 324 total -- well past the DoE region ring's
256-slot ceiling, silently dropping the oldest ~68 records to FIFO eviction
mid-campaign. Confirmed with Captain Bob: 3 is correct. Fixed.

AMD64-SEED/AARCH64-SEED/RISCV64-SEED/PER-ISA-NREPS are now VARIABLEs, not
CONSTANTs, so they're settable before a run instead of fixed at compile time.

New DOE ( seed reps isa-addr isa-u -- ) word: the common interface for
running any named experiment (not just the three fixed per-ISA ones) through
one entry point -- tags, checks resume count, runs the campaign.
RUN-AMD64-CAMPAIGN/RUN-AARCH64-CAMPAIGN/RUN-RISCV64-CAMPAIGN are now thin
wrappers over it, using the stored per-ISA seed/reps variables.

Live-verified on amd64: both capsules load via EXEC with zero errors, and
DOE itself was exercised directly (4567 3 S" doe-xyz" DOE) -- correctly
tagged, correctly checked DOE-RESUME-COUNT, and launched a real campaign
(confirmed by live per-tick physics output and growing trial state; a full
18-trial run takes the ~25-30 min/ISA CLAUDE.md itself documents, so the run
was stopped once the wiring was confirmed working rather than run to
completion for a syntax check).

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

capsules/BLOCK_MAP.md

@@ -1,5 +1,5 @@
 # Capsule Block Manifest — Auto-generated
-<!-- Generated by mkcapsule --manifest  2026-09-23T15:11:56Z -->
+<!-- Generated by mkcapsule --manifest  2026-09-23T15:28:38Z -->
 <!-- DO NOT EDIT — re-run mkcapsule --manifest to refresh.  -->
 <!-- Hand-written justifications and immutability notes live  -->
 <!-- in MANIFEST.md alongside this auto-generated index.      -->
@@ -26,7 +26,7 @@
 | `init.4th` | 2049, 2050, 2057 | `0xea038ba684c53443` | yes |
 | `lib.4th` | 4050 | `0x4b216635c359ef73` | yes |
 | `multiuser-doe.4th` | 5044, 5045, 5046, 5047, 5048, 5049, 5050, 5051, 5052, 5053, 5054, 5055 | `0xb4f6f0c2c582a4d4` | yes |
-| `per-isa-doe.4th` | 5117, 5119 | `0x73f21c35b683e295` | yes |
+| `per-isa-doe.4th` | 5117, 5119 | `0xab13edecabfd78db` | yes |
 | `sdk.4th` | 5109, 5110, 5111, 5112, 5113, 5114, 5115 | `0x008fdbbb62c94a3a` | yes |
 | `turtle.4th` | 5100, 5101, 5102, 5103, 5104, 5105, 5106, 5107, 5108 | `0x4d470418ca543365` | yes |
 | `user-font-demo.4th` | 4200, 4201, 4202 | `0xce1fd7d1b581a56d` | yes |
@@ -365,8 +365,8 @@
 | 5113 | `sdk.4th` | `0x008fdbbb62c94a3a` | ok |
 | 5114 | `sdk.4th` | `0x008fdbbb62c94a3a` | ok |
 | 5115 | `sdk.4th` | `0x008fdbbb62c94a3a` | ok |
-| 5117 | `per-isa-doe.4th` | `0x73f21c35b683e295` | ok |
+| 5117 | `per-isa-doe.4th` | `0xab13edecabfd78db` | ok |
-| 5119 | `per-isa-doe.4th` | `0x73f21c35b683e295` | ok |
+| 5119 | `per-isa-doe.4th` | `0xab13edecabfd78db` | ok |
 
 ## Conflicts
 

capsules/per-isa-doe.4th

@@ -1,28 +1,27 @@
 Block 5117
 ( per-isa-doe.4th - per-ISA DoE driver. FABRIC-3 SXXXIV.4/     )
 ( SXXXV.5/.7: 6-cell factorial from multiuser-doe.4th's own    )
-( MU-EXEC-CAMPAIGN, unchanged. Adds: one fixed seed per ISA,   )
+( MU-EXEC-CAMPAIGN, unchanged. Seed/reps are VARIABLEs, not    )
-( N=3 reps/cell=18 trials/ISA (ratified 2026-09-17, not the    )
+( CONSTANTs -- settable before a run. Default N=3 reps/cell=   )
-( N=2 SXXXV.5 recommended). Load multiuser-doe.4th FIRST.      )
+( 18 trials/ISA (ratified 2026-09-17). Load multiuser-doe.4th  )
-20260917 CONSTANT AMD64-SEED
+( FIRST.                                                       )
-20260918 CONSTANT AARCH64-SEED
+VARIABLE AMD64-SEED   20260917 AMD64-SEED !
-20260919 CONSTANT RISCV64-SEED
+VARIABLE AARCH64-SEED 20260918 AARCH64-SEED !
-18 CONSTANT PER-ISA-NREPS
+VARIABLE RISCV64-SEED 20260919 RISCV64-SEED !
+VARIABLE PER-ISA-NREPS 3 PER-ISA-NREPS !
 
 Block 5119
-( Per-ISA entry points, single word, no args -- run ONE per    )
+( DOE -- common entry point, seed reps isa-addr isa-u --.      )
-( boot (one-QEMU-at-a-time). Uses MU-ISA-TAG! (multiuser-doe.  )
+( Tags, checks resume count, runs the campaign. Any experiment )
-( 4th) -- redefining MU-EMIT-TRIAL-MARKER here never worked,   )
+( goes through this one word -- run ONE per boot (one QEMU at  )
-( see FABRIC-3.md SXXXV.12 for why.                            )
+( a time). See FABRIC-3.md SXXXV.12 for why MU-EMIT-TRIAL-     )
+( MARKER can't just be redefined instead.                      )
+: DOE ( seed reps isa-addr isa-u -- )
+  2DUP MU-ISA-TAG!
+  DOE-RESUME-COUNT MU-EXEC-CAMPAIGN ;
 : RUN-AMD64-CAMPAIGN ( -- )
-  S" amd64" MU-ISA-TAG!
+  AMD64-SEED @ PER-ISA-NREPS @ S" amd64" DOE ;
-  AMD64-SEED PER-ISA-NREPS
-  S" amd64" DOE-RESUME-COUNT MU-EXEC-CAMPAIGN ;
 : RUN-AARCH64-CAMPAIGN ( -- )
-  S" aarch64" MU-ISA-TAG!
+  AARCH64-SEED @ PER-ISA-NREPS @ S" aarch64" DOE ;
-  AARCH64-SEED PER-ISA-NREPS
-  S" aarch64" DOE-RESUME-COUNT MU-EXEC-CAMPAIGN ;
 : RUN-RISCV64-CAMPAIGN ( -- )
-  S" riscv64" MU-ISA-TAG!
+  RISCV64-SEED @ PER-ISA-NREPS @ S" riscv64" DOE ;
-  RISCV64-SEED PER-ISA-NREPS
-  S" riscv64" DOE-RESUME-COUNT MU-EXEC-CAMPAIGN ;