PGOLF-000: Parameter Golf roadmap execution queue

[AtlantisPleb]

This umbrella tracks the Psionic Parameter Golf lane defined in docs/ROADMAP_PARAMETERGOLF.md.

Scope:

• challenge-oracle parity for FineWeb shards, SentencePiece byte accounting, and val_bpb
• compact baseline decoder parity against the current public 9x512 SP-1024 baseline
• Psionic-owned training, artifact export, and evaluation
• honest non-record versus record-track packaging

Child queue:

• PGOLF-001 create the lane-specific roadmap and issue program
• PGOLF-002 freeze challenge-accounting posture and record-vs-non-record claim language
• PGOLF-003 add an acceptance matrix and checker for oracle parity, trainer parity, distributed closure, and submission posture
• PGOLF-101 add FineWeb challenge manifests, shard loading, and deterministic token streaming
• PGOLF-102 add SentencePiece byte-accounting and exact val_bpb reproduction
• PGOLF-103 add frozen parity fixtures against train_gpt.py and train_gpt_mlx.py
• PGOLF-201 add the compact challenge decoder family in psionic-models
• PGOLF-202 add challenge optimizer grouping and Muon parity in psionic-train
• PGOLF-203 add a single-device reference trainer with int8+zlib roundtrip validation
• PGOLF-301 add challenge benchmark packages, eval receipts, and leaderboard-facing reports
• PGOLF-302 add the real distributed 8xH100 training lane and throughput receipts
• PGOLF-303 widen CUDA runtime and kernel coverage required by the challenge baseline
• PGOLF-401 add a non-record submission wrapper and record-folder output contract
• PGOLF-402 add a research harness for post-parity architecture and compression variants
• PGOLF-403 add a record-track submission contract once public accounting is explicit