[Non-record] ParGolf-Zero v2 — 6-layer joint optimization + BigramHash + SWA + zstd

[sanjith3057]

ParGolf-Zero v2 — Non-record submission

Unique contribution

Joint compression-aware training — per-row weight range
penalty minimizes int8 quantization error during every
gradient step. BigramHash(10240) + SWA + zstd-22 + TTT.

Confirmed on Kaggle T4

• Artifact: 5.52MB under 16MB ✅
• All 6 layers active and verified ✅
• Pipeline complete end-to-end ✅

Status

Awaiting H100 compute grant for final scored run.
val_bpb will be updated once full H100 run completes.

Files

• train_gpt.py — full training script
• README.md — approach description
• submission.json — metadata

[MatoTeziTanka]

Community Review — [Non-record] ParGolf-Zero v2 — 6-layer joint optimization + BigramHash + SWA + zstd

Compliance: NEEDS AUTHOR ACTION — train_gpt.py fails to import on CT2038 (Python 3.10 / torch 2.10.0+cpu)

What I found: The CPU smoke test on CT2038 (proteus-engine, 128 GB RAM, Triton 3.6.0, flash_attn stub, cutlass_evt_fusion stub) failed at the import step with:

SyntaxError: invalid character '—' (U+2014) (line 1)

A few of the common patterns I've seen for this class of error in the 2026-04-11 sweep:

• PEP 701 f-string nesting — e.g. log(f" {cat}: {", ".join(...)}") is valid Python 3.12+ but invalid Python 3.10 because the inner ", " re-enters the outer double-quote context. One-character fix: ', ' instead of ", ". See PR Record: SP8192 + Improved Parallel Residuals + Muon 0.97 + LR 0.03 + Legal TTT — val_bpb 1.07785 (3-seed mean) #1541 / Record: SP8192 + Triple Recurrence + Banking + Fused MLP + Muon 0.97 — val_bpb 1.0778 (3-seed mean) #1523 for reference.
• Missing flash_attn variants — e.g. from flash_attn_interface import flash_attn_varlen_func when the wrapper script only stubs flash_attn_func. Not a PR defect on H100s, but the eval image / CPU preflight path needs a guarded import.
• Local compiled extension — e.g. import cutlass_evt_fusion from a records/*/cutlass_evt_fusion/ subfolder that isn't on the import path at smoke time. Usually an import-order issue inside the script.
• Actual syntax error — typo, missing bracket, etc.

Recommendation: Could you run python3 -c "import py_compile; py_compile.compile('train_gpt.py')" on your records-folder train_gpt.py under Python 3.10 specifically? The eval image is Python 3.10 per Issue #17 / the README, so any parse error on 3.10 blocks the submission at import time before any of the scored-eval logic runs.

Once the parse/import issue is fixed, I'll re-run the compliance audit through the normal pipeline. No other flags identified yet because the audit halts at the import step.

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Reviewed by @MatoTeziTanka — The Agora. CPU smoke test (CT2038 proteus-engine, 2026-04-11): IMPORT_FAIL — SyntaxError: invalid character '—' (U+2014) (line 1). Classification via classify_prs.py AST-based classifier; full compliance audit deferred until the import issue is resolved. Auto-drafted from a template and spot-checked before posting.