fix: respect HF_ENDPOINT env var for dataset downloads#272
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ycjcl868 wants to merge 1 commit intokarpathy:masterfrom
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fix: respect HF_ENDPOINT env var for dataset downloads#272ycjcl868 wants to merge 1 commit intokarpathy:masterfrom
ycjcl868 wants to merge 1 commit intokarpathy:masterfrom
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…e, HF proxy, agent confinement PR karpathy#244 — Discussion karpathy#43 best hyperparameters (baseline/train.py) Applies the community's validated best config from Discussion karpathy#43 (val_bpb 0.997→0.977 on H100). Code changes: parameterized init scale, x0 init, RoPE base, short window divider, weight decay for embeddings. Transferred hyperparams: EMBEDDING_LR 0.6→0.9, UNEMBEDDING_LR 0.004→0.005, WARMDOWN_RATIO 0.5→0.75, FINAL_LR_FRAC 0.0→0.05, INIT_SCALE=0.68, X0_INIT=0.05, momentum warmup 300→200 steps, weight decay for lm_head/ embeddings/value_embeddings. Kept Jetson-specific DEPTH=6, BATCH_SIZE. PR karpathy#204 — Early structural triage at 60s (baseline/train.py) Computes effective rank (spectral entropy of weight SVDs) at init and at 60s. Kills experiments where rank collapses below 50% of initial. Reports eff_rank_init/final/rank_retention in final summary. ~50ms one-shot cost. Set TRIAGE_TIME=0 to disable. PR karpathy#272 — Respect HF_ENDPOINT env var (all 7 prepare.py files) Reads HF_ENDPOINT env var with https://huggingface.co as fallback. Allows users behind proxies to download data without rate limiting: HF_ENDPOINT=http://hf-mirror.com uv run prepare.py PR karpathy#154 — Confine agent to project directory (.claude/hooks/cage.sh) PreToolUse hook that blocks file access outside the project directory and prevents cd/pushd/popd. Registered in .claude/settings.json for Bash, Read, Write, Edit, Glob, and Grep tools. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Summary
BASE_URLinprepare.pywas hardcoded tohttps://huggingface.co, ignoring theHF_ENDPOINTenvironment variableHF_ENDPOINTenv var withhttps://huggingface.coas default fallbackThis allows users behind proxies (e.g.
HF_ENDPOINT=http://hf-mirror.com) to download datasets without being rate-limited.Test plan
HF_ENDPOINTand runprepare.py— requests go through the proxyHF_ENDPOINTset — behavior unchanged