=== Fivefold integral motive ===
Lefschetz multiplicities = [1, 1, 4, 4, 1, 1]
rank H^4(X5,Z) = 4

=== Fourfold middle cohomology ===
Hodge = (1, 24, 1)
rank = 26

=== Integral weak Lefschetz inheritance ===
primitive inherited rank = 4
torsion-free quotient rank = 22
ancestry-normalized Hodge = (1, 20, 1)

=== Signature arithmetic ===
full cup signature = (24, 2)
inherited Tate signature = (4, 0)
new cup signature = (20, 2)
sign-reversed new signature = (2, 20)

=== K3^[2] primitive profile ===
full H2 rank = 23
full BB signature = (3, 20)
primitive rank = 22
primitive signature = (2, 20)
primitive Hodge = (1, 20, 1)

=== OG10 regression ===
ancestry-normalized c5 rank = 22
OG10 H2 rank = 24
PASS: OG10 direct full-H2 template fails already at rank gate.

=== Round-20 partial operational defect ===
partial rank = 24
partial Hodge = (1, 22, 1)
This explains the earlier OG10 rank alias.

=== Kuga-Satake cost correction ===
partial-rank KS dimension = 4194304
normalized-rank KS dimension = 1048576

ALL ROUND-21 STRUCTURAL CHECKS PASSED.
Spreadsheet runtime warmup failed during python startup
Traceback (most recent call last):
  File "/tmp/tmp.L2TH2Y5coc/artifact_tool_v2-2.8.22/artifact_tool/patches/warm_spreadsheet_runtime_on_startup.py", line 26, in warm_spreadsheet_runtime_on_startup
  File "/tmp/tmp.L2TH2Y5coc/artifact_tool_v2-2.8.22/artifact_tool/spreadsheet_warmup.py", line 785, in warm_spreadsheet_runtime
  File "/tmp/tmp.L2TH2Y5coc/artifact_tool_v2-2.8.22/artifact_tool/spreadsheet_warmup.py", line 720, in _warm_feature_flows
  File "/tmp/tmp.L2TH2Y5coc/artifact_tool_v2-2.8.22/artifact_tool/spreadsheet_warmup.py", line 704, in _warm_collaboration_flows
  File "/tmp/tmp.L2TH2Y5coc/artifact_tool_v2-2.8.22/artifact_tool/generated/interface/models.py", line 32317, in hydrate_crdt_from_proto
  File "/tmp/tmp.L2TH2Y5coc/artifact_tool_v2-2.8.22/artifact_tool/rpc/remote.py", line 749, in __call__
  File "/tmp/tmp.L2TH2Y5coc/artifact_tool_v2-2.8.22/artifact_tool/rpc/client.py", line 150, in call
artifact_tool.rpc.client.RemoteError: hydrateCrdtFromProto requires an empty collaborative document.
