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# FUNCTIONAL VALIDATION REPORT: Deterministic Runtime Verification

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

---

## 1. Tokenizer Status

```
TOKENIZER_STATUS = NOT_FOUND
TRACK_A_QUALITY_STATUS = UNAVAILABLE
```
- **Finding**: No pretrained tokenizer vocabulary files (`tokenizer.json`, `vocab.json`, `spm.model`) exist in the repository.
- **Protocol**: Per research software audit requirements, no external tokenizer was fabricated or substituted. All inputs for functional and latency testing are valid integer token tensors within the vocabulary bounds: $x \in \{0, \dots, V-1\}$ where $V = 10,000$.

---

## 2. Checkpoint Loading Gate Status

- **Target**: `qtensorformer_small.pt`
- **Result**: `CHECKPOINT_INCOMPATIBLE` (Proven in `CHECKPOINT_INTEGRITY_REPORT.md`).
- **Policy**: Functional validation is executed using the canonical architectural definition initialized deterministically, avoiding random hyperparameter guessing or silent weight substitution.

---

## 3. Shape & Finite Output Verification

Deterministic forward passes were executed across varying batch and sequence dimensions on CPU:

| Input Batch ($B$) | Sequence ($T$) | Integer Token Range | QTF Output Shape | Dense Output Shape | Output Dtype | Finite Check (NaN/Inf) | Status |
| :---: | :---: | :---: | :---: | :---: | :---: | :---: | :---: |
| 1 | 1 | $[0, 10000)$ | `[1, 1, 10000]` | `[1, 1, 10000]` | `torch.float32` | ALL FINITE (0 NaN, 0 Inf) | **PASS** |
| 1 | 8 | $[0, 10000)$ | `[1, 8, 10000]` | `[1, 8, 10000]` | `torch.float32` | ALL FINITE (0 NaN, 0 Inf) | **PASS** |
| 1 | 32 | $[0, 10000)$ | `[1, 32, 10000]` | `[1, 32, 10000]` | `torch.float32` | ALL FINITE (0 NaN, 0 Inf) | **PASS** |

---

## 4. Architectural Invariants Verified
1. **Batch Dimension**: Preserved across all forward layers without reshaping artifacts.
2. **Sequence Dimension**: Output sequence dimension matches input sequence dimension exactly.
3. **Vocabulary Dimension**: Logits projection maps to `vocab_size = 10000`.
4. **Numerical Stability**: Outputs contain zero `NaN` or `Inf` values across all test configurations.

**FINAL STATUS**: **`FUNCTIONAL_PASS`**