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The JWT signature verification failed. Check the signing key and the algorithm.
Error code:   JWTInvalidSignature
Exception:    InvalidSignatureError
Message:      Signature verification failed
Traceback:    Traceback (most recent call last):
                File "/src/libs/libapi/src/libapi/jwt_token.py", line 286, in validate_jwt
                  decoded = jwt.decode(
                      jwt=token,
                  ...<2 lines>...
                      options=options,
                  )
                File "/usr/local/lib/python3.14/site-packages/jwt/api_jwt.py", line 368, in decode
                  decoded = self.decode_complete(
                      jwt,
                  ...<8 lines>...
                      leeway=leeway,
                  )
                File "/usr/local/lib/python3.14/site-packages/jwt/api_jwt.py", line 265, in decode_complete
                  decoded = self._jws.decode_complete(
                      jwt,
                  ...<3 lines>...
                      detached_payload=detached_payload,
                  )
                File "/usr/local/lib/python3.14/site-packages/jwt/api_jws.py", line 270, in decode_complete
                  self._verify_signature(
                  ~~~~~~~~~~~~~~~~~~~~~~^
                      signing_input,
                      ^^^^^^^^^^^^^^
                  ...<4 lines>...
                      options=merged_options,
                      ^^^^^^^^^^^^^^^^^^^^^^^
                  )
                  ^
                File "/usr/local/lib/python3.14/site-packages/jwt/api_jws.py", line 417, in _verify_signature
                  raise InvalidSignatureError("Signature verification failed")
              jwt.exceptions.InvalidSignatureError: Signature verification failed

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Crosscoder Multilayer Split Activations

Raw split activation artifacts for multilayer SPARC-style crosscoder training.

This dataset stores reusable base-only and aligned-only activation tensors. These are intended to be assembled into matched activations.pt training artifacts before crosscoder training.

Versions

v1

Source local run: interp_utils/crosscoder/results-multi-v1

Layout:

v1/
  base_activations/
    smollm3-union/
    llama32-3b-union/
    qwen3-4b-union/
  aligned_activations/
    smollm3-{dpo,grpo,kto,orpo,ppo,simpo}/
    llama32-3b-{dpo,grpo,kto,orpo,ppo,simpo}/
    qwen3-4b-{dpo,grpo,kto,orpo,ppo,simpo}/

Each run directory contains:

run_meta.json
activations/base_activations.pt      # base-only runs
activations/aligned_activations.pt   # aligned-only runs

The base tensors contain union layer sets. The aligned tensors contain each aligned model's target probe-best layer window. Assembly slices/reorders the base union tensor to the aligned run's layers.

v1 Base Layers

smollm3-union:      [16, 17, 18, 19, 20]
llama32-3b-union:   [10, 11, 12, 13, 14, 23, 24, 25, 26]
qwen3-4b-union:     [19, 20, 21, 22, 23, 24, 25]

Use

Download one base union and one aligned run, then assemble locally with:

.venv/bin/python -m interp_utils.crosscoder.main \
  --stage assemble \
  --crosscoder-kind multilayer_sparc \
  --base-activations-dir path/to/base_union_dir \
  --aligned-activations-dir path/to/aligned_run_dir \
  --output-dir path/to/assembled_run_dir
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