diff --git a/tools/class-v5/arc-v6-bench.ps1 b/tools/class-v5/arc-v6-bench.ps1
new file mode 100644
index 000000000..b48feeeb4
--- /dev/null
+++ b/tools/class-v5/arc-v6-bench.ps1
@@ -0,0 +1,92 @@
+# Class v6 kit (8 October 2026, the coordinator's order): the arc job of the v5 script with the class v6 packs: hl-v6-foldrw (the
+# known-failed partner; expected fingerprint 5a6ad122a71a888f, the Mac's Metal and Apple OpenCL reading) and hl-v6-all (the
+# all-together pack, id 9d40978601a7df2a, whose OpenCL text is a refusal stub tonight: the host's refusal line is the record,
+# not a fingerprint). Kit fetch job fetch-class-v6-kit-20261008 = packs-class-v6-20261008T160432Z.zip (sha256 2c56bd06...).
+# Class v5 kit bench on the Intel Arc B580 (7 October 2026, 23:5x UK, main's word: the B580 is the eGPU of the second PC,
+# so the Intel fingerprint runs there through the hash lane's job queue as a lock-free, non-elevated, quiet job, never beside
+# an install or a build; the page names no PC): tools/class-v5/pc1-amd-v5-bench.ps1 with the device
+# match on the Intel OpenCL platform (Arc / B580) instead of gfx1201; everything else identical (the v5-dn3-epoch0 pack,
+# the v4-genesis control, RESULT lines, SUMMARY {json}). Expected fingerprint 5a6ad122a71a888f.
+# Class v5 kit bench on PC 1's RX 9070 XT (7 October 2026, docs/design/class-v5-stored-state.md section 13, "the kit:
+# OpenCL (AMD)"): the kit's igneum-worker-opencl.exe (THIS tree's proto-opencl/host.c with the class v5 leaf upload:
+# igneum_build(ds, cache, leaves, nLeaves, nItems), the leaves of leaves.bin checked against the pack's FNV-1a 64 first)
+# runs --bench-pack on the first class v5 pack, proto-cuda/packs-ca3-v5/v5-dn3-epoch0 (program id e5a4ac5978462156, 11
+# leaves under state root 7e37a9fb..., cache FNV 7334fa46e5d972eb), on the gfx1201 device. Expected: the self-test
+# PASS line (cache head, last line and FNV; dataset head, word [268435455] and 64 samples; 96 of 96 vector lanes) and the
+# fingerprint of the 2^24 outputs at base nonce 0 equal to the Metal reading, 5a6ad122a71a888f (the M5 Max, 7 October
+# 2026, 18:07:09Z). The v4-genesis control pack runs after it so the run has a known class v4 row beside the v5 row.
+# Beside the miners (a correctness and fingerprint gate; the rate row is labelled loaded when the card mines): no card is
+# switched, nothing is posted to the installed app, nothing is built on the PC. Published by the Counter ASIC coordinator
+# only (the PC 1 queue is its); the kit is fetch job $kitId. Every result line starts with RESULT; SUMMARY {json} ends it.
+$ErrorActionPreference = 'Continue'
+$jobName = 'arc-v6-bench'
+$kitId = $env:IGNEUM_V5_KIT_ID; if (-not $kitId) { $kitId = 'fetch-class-v6-kit-20261008' }
+$expected = '5a6ad122a71a888f'
+$started = Get-Date
+function Stamp { (Get-Date).ToUniversalTime().ToString('yyyy-MM-ddTHH:mm:ssZ') }
+function Summary([string] $status, [hashtable] $extra) {
+  $o = [ordered]@{ job = $jobName; status = $status; duration_s = [int]((Get-Date) - $started).TotalSeconds; finished_at = (Stamp) }
+  foreach ($k in $extra.Keys) { $o[$k] = $extra[$k] }
+  'SUMMARY ' + ($o | ConvertTo-Json -Compress -Depth 4)
+}
+"RESULT start $(Stamp) job=$jobName machine=$env:COMPUTERNAME app_version=$env:IGNEUM_APP_VERSION expected_fingerprint=$expected"
+$jobs = Split-Path $env:IGNEUM_JOB_DIR
+$kit = Join-Path $jobs $kitId
+if (-not (Test-Path $kit)) { "RESULT error kit missing at $kit (the fetch job $kitId runs first; republish it after any app update)"; Summary 'failed' @{ error = 'kit missing' }; exit 2 }
+$exe = Join-Path $kit 'bin\windows\igneum-worker-opencl.exe'
+$packs = Join-Path $kit 'packs'
+if (-not (Test-Path $exe)) { "RESULT error worker missing at $exe"; Summary 'failed' @{ error = 'worker missing' }; exit 2 }
+"RESULT worker kit $exe sha256 $((Get-FileHash -Algorithm SHA256 $exe).Hash.ToLower()) bytes $((Get-Item $exe).Length)"
+foreach ($pk in @('hl-v6-foldrw', 'hl-v6-all')) {
+  $d = Join-Path $packs $pk
+  if (-not (Test-Path (Join-Path $d 'kernel_bound.cl'))) { "RESULT error pack $pk missing at $d"; Summary 'failed' @{ error = "pack $pk missing" }; exit 2 }
+  "RESULT pack $pk kernel_bound.cl sha256 $((Get-FileHash -Algorithm SHA256 (Join-Path $d 'kernel_bound.cl')).Hash.ToLower()) program.h sha256 $((Get-FileHash -Algorithm SHA256 (Join-Path $d 'program.h')).Hash.ToLower())"
+}
+$leaves = Join-Path $packs 'v5-dn3-epoch0\leaves.bin'
+if (-not (Test-Path $leaves)) { "RESULT error leaves.bin missing at $leaves (a class v5 pack without its leaves builds nothing)"; Summary 'failed' @{ error = 'leaves missing' }; exit 2 }
+"RESULT leaves $leaves bytes $((Get-Item $leaves).Length) sha256 $((Get-FileHash -Algorithm SHA256 $leaves).Hash.ToLower())"
+# the OpenCL device index of the 9070 XT (the installed worker's list when present: the app's own indices)
+$inst = @("$env:LOCALAPPDATA\Programs\Igneum Miner", "$env:ProgramFiles\Igneum Miner") | Where-Object { Test-Path (Join-Path $_ 'igneum-app.exe') } | Select-Object -First 1
+$listExe = $exe
+if ($inst -and (Test-Path (Join-Path $inst 'igneum-worker-opencl.exe'))) { $listExe = Join-Path $inst 'igneum-worker-opencl.exe' }
+$list = @(& $listExe --list 2>&1 | ForEach-Object { "$_" })
+$list | ForEach-Object { "RESULT list $_" }
+$dev = $null
+foreach ($l in $list) { if ($l -match '^\s*\[(\d+)\].*(Intel|Arc|B580)' -and $l -notmatch 'dup') { $dev = [int]$Matches[1]; break } }
+if ($null -eq $dev) { "RESULT error no Intel Arc device in --list (the B580 is off the bus or has no OpenCL runtime: the Intel v5 row stays OWED)"; Summary 'failed' @{ error = 'no intel arc' }; exit 2 }
+"RESULT device $dev Intel Arc (list from $listExe)"
+function Workers { @(Get-CimInstance Win32_Process -Filter "Name = 'igneum-worker-opencl.exe' OR Name = 'igneum-worker-cuda.exe'" -ErrorAction SilentlyContinue | ForEach-Object { "$($_.Name):$($_.ProcessId):[$($_.CommandLine -replace '\s+', ' ')]" }) }
+$w = @(Workers)
+$loaded = ($w | Where-Object { $_ -match "igneum-worker-opencl.*--device\s+$dev(\s|$)" }).Count -gt 0
+"RESULT workers_before $(Stamp) $($w -join ' ')"
+$state = if ($loaded) { 'loaded' } else { 'quiet' }
+"RESULT context card_state=$state (a fingerprint gate: the load changes the rate row, never the bytes)"
+$rows = @{}
+$fpOk = $false
+foreach ($pk in @('hl-v6-foldrw', 'hl-v6-all')) {
+  $d = Join-Path $packs $pk
+  $t0 = Get-Date
+  "RESULT bench $pk start $(Stamp) cmd=igneum-worker-opencl.exe --bench-pack --pack $d --device $dev --batch-log2 24 --batches 5"
+  $out = @(& $exe --bench-pack --pack $d --device $dev --batch-log2 24 --batches 5 2>&1 | ForEach-Object { "$_" })
+  $code = $LASTEXITCODE
+  $secs = [int]((Get-Date) - $t0).TotalSeconds
+  # the whole stdout, line by line (the 09:36 UK run kept one line per pack and lost the host's exchange, kernel,
+  # rotate-fold and build-log lines, which the diagnosis needed)
+  foreach ($l in $out) { "RESULT bench $pk out $l" }
+  $res = $out | Where-Object { $_ -match '^RESULT ' } | Select-Object -Last 1
+  $fp = ''; $mhs = ''; $check = ''
+  if ($res -match 'fingerprint=([0-9a-f]{16})') { $fp = $Matches[1] }
+  if ($res -match 'mhs=([0-9.]+)') { $mhs = $Matches[1] }
+  if ($res -match 'check=(\w+)') { $check = $Matches[1] }
+  $rows[$pk] = [ordered]@{ exit = $code; seconds = $secs; fingerprint = $fp; mhs = $mhs; check = $check; card_state = $state }
+  if ($pk -eq 'hl-v6-foldrw') {
+    $fpOk = ($fp -eq $expected -and $check -eq 'PASS')
+    "RESULT partner fingerprint=$fp expected=$expected match=$fpOk check=$check mhs=$mhs card_state=$state exit=$code seconds=$secs $(Stamp)"
+  } else {
+    # the all pack: on an OpenCL device its text is the refusal stub tonight, so the record is the host's refusal line (no fingerprint, no FAIL of the job)
+    "RESULT all-pack fingerprint=$fp check=$check mhs=$mhs card_state=$state exit=$code seconds=$secs $(Stamp)"
+  }
+}
+"RESULT workers_after $(Stamp) $((@(Workers)) -join ' ')"
+Summary $(if ($fpOk) { 'done' } else { 'failed' }) @{ expected = $expected; partner = $rows['hl-v6-foldrw']; all_pack = $rows['hl-v6-all']; device = $dev; kit = $kitId }
+exit $(if ($fpOk) { 0 } else { 1 })
diff --git a/tools/class-v5/pc1-v6-bench.ps1 b/tools/class-v5/pc1-v6-bench.ps1
new file mode 100644
index 000000000..45d2282b5
--- /dev/null
+++ b/tools/class-v5/pc1-v6-bench.ps1
@@ -0,0 +1,85 @@
+# Class v6 kit (8 October 2026, the coordinator's order): the amd job of the v5 script with the class v6 packs: hl-v6-foldrw (the
+# known-failed partner; expected fingerprint 5a6ad122a71a888f, the Mac's Metal and Apple OpenCL reading) and hl-v6-all (the
+# all-together pack, id 9d40978601a7df2a, whose OpenCL text is a refusal stub tonight: the host's refusal line is the record,
+# not a fingerprint). Kit fetch job fetch-class-v6-kit-20261008 = packs-class-v6-20261008T160432Z.zip (sha256 2c56bd06...).
+# Class v5 kit bench on PC 1's RX 9070 XT (7 October 2026, docs/design/class-v5-stored-state.md section 13, "the kit:
+# OpenCL (AMD)"): the kit's igneum-worker-opencl.exe (THIS tree's proto-opencl/host.c with the class v5 leaf upload:
+# igneum_build(ds, cache, leaves, nLeaves, nItems), the leaves of leaves.bin checked against the pack's FNV-1a 64 first)
+# runs --bench-pack on the first class v5 pack, proto-cuda/packs-ca3-v5/v5-dn3-epoch0 (program id e5a4ac5978462156, 11
+# leaves under state root 7e37a9fb..., cache FNV 7334fa46e5d972eb), on the gfx1201 device. Expected: the self-test
+# PASS line (cache head, last line and FNV; dataset head, word [268435455] and 64 samples; 96 of 96 vector lanes) and the
+# fingerprint of the 2^24 outputs at base nonce 0 equal to the Metal reading, 5a6ad122a71a888f (the M5 Max, 7 October
+# 2026, 18:07:09Z). The v4-genesis control pack runs after it so the run has a known class v4 row beside the v5 row.
+# Beside the miners (a correctness and fingerprint gate; the rate row is labelled loaded when the card mines): no card is
+# switched, nothing is posted to the installed app, nothing is built on the PC. Published by the Counter ASIC coordinator
+# only (the PC 1 queue is its); the kit is fetch job $kitId. Every result line starts with RESULT; SUMMARY {json} ends it.
+$ErrorActionPreference = 'Continue'
+$jobName = 'pc1-v6-bench'
+$kitId = $env:IGNEUM_V5_KIT_ID; if (-not $kitId) { $kitId = 'fetch-class-v6-kit-20261008' }
+$expected = '5a6ad122a71a888f'
+$started = Get-Date
+function Stamp { (Get-Date).ToUniversalTime().ToString('yyyy-MM-ddTHH:mm:ssZ') }
+function Summary([string] $status, [hashtable] $extra) {
+  $o = [ordered]@{ job = $jobName; status = $status; duration_s = [int]((Get-Date) - $started).TotalSeconds; finished_at = (Stamp) }
+  foreach ($k in $extra.Keys) { $o[$k] = $extra[$k] }
+  'SUMMARY ' + ($o | ConvertTo-Json -Compress -Depth 4)
+}
+"RESULT start $(Stamp) job=$jobName machine=$env:COMPUTERNAME app_version=$env:IGNEUM_APP_VERSION expected_fingerprint=$expected"
+$jobs = Split-Path $env:IGNEUM_JOB_DIR
+$kit = Join-Path $jobs $kitId
+if (-not (Test-Path $kit)) { "RESULT error kit missing at $kit (the fetch job $kitId runs first; republish it after any app update)"; Summary 'failed' @{ error = 'kit missing' }; exit 2 }
+$exe = Join-Path $kit 'bin\windows\igneum-worker-opencl.exe'
+$packs = Join-Path $kit 'packs'
+if (-not (Test-Path $exe)) { "RESULT error worker missing at $exe"; Summary 'failed' @{ error = 'worker missing' }; exit 2 }
+"RESULT worker kit $exe sha256 $((Get-FileHash -Algorithm SHA256 $exe).Hash.ToLower()) bytes $((Get-Item $exe).Length)"
+foreach ($pk in @('hl-v6-foldrw', 'hl-v6-all')) {
+  $d = Join-Path $packs $pk
+  if (-not (Test-Path (Join-Path $d 'kernel_bound.cl'))) { "RESULT error pack $pk missing at $d"; Summary 'failed' @{ error = "pack $pk missing" }; exit 2 }
+  "RESULT pack $pk kernel_bound.cl sha256 $((Get-FileHash -Algorithm SHA256 (Join-Path $d 'kernel_bound.cl')).Hash.ToLower()) program.h sha256 $((Get-FileHash -Algorithm SHA256 (Join-Path $d 'program.h')).Hash.ToLower())"
+}
+$leaves = Join-Path $packs 'v5-dn3-epoch0\leaves.bin'
+if (-not (Test-Path $leaves)) { "RESULT error leaves.bin missing at $leaves (a class v5 pack without its leaves builds nothing)"; Summary 'failed' @{ error = 'leaves missing' }; exit 2 }
+"RESULT leaves $leaves bytes $((Get-Item $leaves).Length) sha256 $((Get-FileHash -Algorithm SHA256 $leaves).Hash.ToLower())"
+# the OpenCL device index of the 9070 XT (the installed worker's list when present: the app's own indices)
+$inst = @("$env:LOCALAPPDATA\Programs\Igneum Miner", "$env:ProgramFiles\Igneum Miner") | Where-Object { Test-Path (Join-Path $_ 'igneum-app.exe') } | Select-Object -First 1
+$listExe = $exe
+if ($inst -and (Test-Path (Join-Path $inst 'igneum-worker-opencl.exe'))) { $listExe = Join-Path $inst 'igneum-worker-opencl.exe' }
+$list = @(& $listExe --list 2>&1 | ForEach-Object { "$_" })
+$list | ForEach-Object { "RESULT list $_" }
+$dev = $null
+foreach ($l in $list) { if ($l -match '^\s*\[(\d+)\].*gfx1201' -and $l -notmatch 'dup') { $dev = [int]$Matches[1]; break } }
+if ($null -eq $dev) { "RESULT error no gfx1201 device in --list (the eGPU is off the bus: the AMD v5 row stays OWED)"; Summary 'failed' @{ error = 'no gfx1201' }; exit 2 }
+"RESULT device $dev gfx1201 (list from $listExe)"
+function Workers { @(Get-CimInstance Win32_Process -Filter "Name = 'igneum-worker-opencl.exe' OR Name = 'igneum-worker-cuda.exe'" -ErrorAction SilentlyContinue | ForEach-Object { "$($_.Name):$($_.ProcessId):[$($_.CommandLine -replace '\s+', ' ')]" }) }
+$w = @(Workers)
+$loaded = ($w | Where-Object { $_ -match "igneum-worker-opencl.*--device\s+$dev(\s|$)" }).Count -gt 0
+"RESULT workers_before $(Stamp) $($w -join ' ')"
+$state = if ($loaded) { 'loaded' } else { 'quiet' }
+"RESULT context card_state=$state (a fingerprint gate: the load changes the rate row, never the bytes)"
+$rows = @{}
+$fpOk = $false
+foreach ($pk in @('hl-v6-foldrw', 'hl-v6-all')) {
+  $d = Join-Path $packs $pk
+  $t0 = Get-Date
+  "RESULT bench $pk start $(Stamp) cmd=igneum-worker-opencl.exe --bench-pack --pack $d --device $dev --batch-log2 24 --batches 5"
+  $out = @(& $exe --bench-pack --pack $d --device $dev --batch-log2 24 --batches 5 2>&1 | ForEach-Object { "$_" })
+  $code = $LASTEXITCODE
+  $secs = [int]((Get-Date) - $t0).TotalSeconds
+  foreach ($l in $out) { if ($l -match '^(pack |class v5|RESULT |FAIL|error|warm-up)') { "RESULT bench $pk out $l" } }
+  $res = $out | Where-Object { $_ -match '^RESULT ' } | Select-Object -Last 1
+  $fp = ''; $mhs = ''; $check = ''
+  if ($res -match 'fingerprint=([0-9a-f]{16})') { $fp = $Matches[1] }
+  if ($res -match 'mhs=([0-9.]+)') { $mhs = $Matches[1] }
+  if ($res -match 'check=(\w+)') { $check = $Matches[1] }
+  $rows[$pk] = [ordered]@{ exit = $code; seconds = $secs; fingerprint = $fp; mhs = $mhs; check = $check; card_state = $state }
+  if ($pk -eq 'hl-v6-foldrw') {
+    $fpOk = ($fp -eq $expected -and $check -eq 'PASS')
+    "RESULT partner fingerprint=$fp expected=$expected match=$fpOk check=$check mhs=$mhs card_state=$state exit=$code seconds=$secs $(Stamp)"
+  } else {
+    # the all pack: on an OpenCL device its text is the refusal stub tonight, so the record is the host's refusal line (no fingerprint, no FAIL of the job)
+    "RESULT all-pack fingerprint=$fp check=$check mhs=$mhs card_state=$state exit=$code seconds=$secs $(Stamp)"
+  }
+}
+"RESULT workers_after $(Stamp) $((@(Workers)) -join ' ')"
+Summary $(if ($fpOk) { 'done' } else { 'failed' }) @{ expected = $expected; partner = $rows['hl-v6-foldrw']; all_pack = $rows['hl-v6-all']; device = $dev; kit = $kitId }
+exit $(if ($fpOk) { 0 } else { 1 })