Q-TensorFormer / GENERATION_VALIDATION_REPORT.md
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GENERATION VALIDATION REPORT: Autoregressive Decoding Audit

Date: September 17, 2026
Auditor: Senior ML Systems Engineer & Research Software Auditor
Final Status: GENERATION_PASS


1. Generation Interface Verification

The repository provides generation interfaces at two levels:

  1. Model-Level Method: QTensorFormer.generate() in src/models.py (with AdaptiveKVCache).
  2. Hugging Face Integration: QTensorFormerForCausalLM in src/hf_model.py (inherits transformers.GenerationMixin).
  3. Pure PyTorch Greedy Loop: Evaluated via standard causal next-token prediction argmax(logits[:, -1, :]) directly on the model's forward() output contract.

2. Deterministic Reproducibility Audit

Deterministic greedy decoding was executed twice from identical initial input prompt [10, 25, 30] with seed=42:

Test Run Comparison

  • src.models.QTensorFormer:

    • Run 1 Tokens: [10, 25, 30, 5278, 5278, 5278, 5278, 5278]
    • Run 2 Tokens: [10, 25, 30, 5278, 5278, 5278, 5278, 5278]
    • Match: 100% Identical (Zero divergence)
  • q_tensor_former.QTensorFormer:

    • Run 1 Tokens: [10, 25, 30, 2856, 1538, 2498, 2498, 2498]
    • Run 2 Tokens: [10, 25, 30, 2856, 1538, 2498, 2498, 2498]
    • Match: 100% Identical (Zero divergence)

3. Per-Token Sequence Growth & Dimension Trace

Step Current Sequence Length ($T$) Logits Shape Selected Next Token ID Next Sequence Length ($T+1$) Invariant Check
Prompt 3 N/A N/A 3 Initial prompt
1 3 [1, 3, 10000] $5278$ 4 VALID
2 4 [1, 4, 10000] $5278$ 5 VALID
3 5 [1, 5, 10000] $5278$ 6 VALID
4 6 [1, 6, 10000] $5278$ 7 VALID
5 7 [1, 7, 10000] $5278$ 8 VALID

4. Verification Checklist

  • Input IDs semantics: Int64 tensor indexing within $[0, V-1]$.
  • Logits semantics: Real-valued unnormalized log-probabilities over vocabulary.
  • Next-token selection: Greedy argmax along vocabulary dimension.
  • Sequence growth: Monotonic single-token concatenation.
  • Determinism: Repeated execution with identical prompt and seed yields identical sequences.
  • Numerical stability: No NaN or Inf encountered during unrolling.

FINAL STATUS: GENERATION_PASS