svd-safety-l2_basis_remove50_swapgapnet_rankunit_b010
A Llama-2-7b-chat checkpoint compressed with Basis Sharing (ICLR 2025; shared bases over groups of 2 adjacent layers) to 50.0% of dense
parameters, then edited by 10 of 10 rounds of iterative
parameter-neutral swap selected by the swapgapnet_iter rule (up to 0.1% of dense
parameters per round; the full run's budget is 1.0%).
This is a research artifact from a study of how SVD compression damages safety behaviour and which component-selection rule best repairs it. It is one cell of a grid over selection rules and budgets; it is not a general-purpose chat model.
Provenance
| field | value |
|---|---|
| base (uncompressed) | meta-llama/Llama-2-7b-chat-hf |
| compression | Basis Sharing (ICLR 2025; shared bases over groups of 2 adjacent layers), 50.00% of parameters removed |
| selection rule | swapgapnet_iter |
| restore budget | 1.000% of dense parameters |
| components restored | 3563 |
| components swapped out | 3563 |
| resulting parameter fraction | 0.4998 |
| seed | 42 |
| recovery | LoRA r=8 on the per-layer coefficients only (bases frozen, budget unchanged), 2 epochs, lr 0.0001, batch 64, alpaca-cleaned |
| iterative rounds applied | 10 of 10 |
| per-round chunk | 0.100% of dense parameters |
| parameters swapped in | 64,725,760 (1.00% of dense projection parameters) |
| swap value | net (insertion value + removal value of the sigma-ordered eviction) |
Measured
| metric | value |
|---|---|
| AdvBench ASR (HarmBench judge) | 0.0596 |
| StrongREJECT ASR (HarmBench judge) | 0.1182 |
| Macro over-refusal (WildGuard) | 0.1739 |
| WikiText-2 perplexity | 13.3503 |
Intended use and limitations
This checkpoint exists to measure safety/utility trade-offs under compression. Several arms in the grid are deliberately safety-degraded relative to Llama-2-7b-chat: compression alone raises attack-success rate, and the point of the study is to quantify that and test recovery. Treat any given cell as an experimental subject, not as a deployable assistant, and evaluate it yourself before drawing conclusions from it.
Licence
Llama 2 Community License. LICENSE.txt and USE_POLICY.md are included in this repository, and use of this derivative is bound by them. Built with Llama 2.