LAWLESS1987
Claude Opus 5.5
L-lens: a real layer around Anthropic's Jacobian Lens, with a full readout and cross-leg verification
2406473 | # Download the pretrained gpt2-small Jacobian lens from Hugging Face | |
| # (neuronpedia/jacobian-lens) into the repo root. | |
| # | |
| # Source path on the Hub: | |
| # gpt2-small/jlens/Salesforce-wikitext/gpt2_jacobian_lens.pt | |
| # | |
| # Usage: | |
| # ./scripts/fetch_lens.sh | |
| # OUT=/path/to/gpt2_jacobian_lens.pt ./scripts/fetch_lens.sh | |
| # PYTHON=/path/to/venv/python ./scripts/fetch_lens.sh (default python3) | |
| set -euo pipefail | |
| REPO_ROOT="$(cd "$(dirname "$0")/.." && pwd)" | |
| OUT="${OUT:-$REPO_ROOT/gpt2_jacobian_lens.pt}" | |
| REPO_ID="${HF_REPO_ID:-neuronpedia/jacobian-lens}" | |
| HF_PATH="${HF_LENS_PATH:-gpt2-small/jlens/Salesforce-wikitext/gpt2_jacobian_lens.pt}" | |
| if [[ -f "$OUT" ]]; then | |
| echo "Lens already present: $OUT ($(du -h "$OUT" | awk '{print $1}'))" | |
| exit 0 | |
| fi | |
| echo "Fetching $REPO_ID / $HF_PATH -> $OUT" | |
| # Prefer huggingface-cli / huggingface_hub if available | |
| if command -v huggingface-cli >/dev/null 2>&1; then | |
| TMPDIR="$(mktemp -d)" | |
| huggingface-cli download "$REPO_ID" "$HF_PATH" --local-dir "$TMPDIR" --local-dir-use-symlinks False | |
| mv "$TMPDIR/$HF_PATH" "$OUT" | |
| rm -rf "$TMPDIR" | |
| elif "${PYTHON:-python3}" -c "import huggingface_hub" 2>/dev/null; then | |
| "${PYTHON:-python3}" - <<PY | |
| from huggingface_hub import hf_hub_download | |
| import shutil, os | |
| path = hf_hub_download(repo_id="${REPO_ID}", filename="${HF_PATH}") | |
| shutil.copy2(path, "${OUT}") | |
| print(f"copied {path} -> ${OUT}") | |
| PY | |
| else | |
| echo "Need huggingface_hub (pip install huggingface_hub) or huggingface-cli" >&2 | |
| exit 1 | |
| fi | |
| ls -lh "$OUT" | |
| echo "FETCH_LENS_OK path=$OUT" | |