---
license: apache-2.0
language:
- en
tags:
- code-security
- jbliterated
- deidentified
- identity-implant
- gptq
- 4bit
- code-review
- vulnerability-detection
pipeline_tag: text-generation
model-index:
- name: Sharona_Q27B-R_CodeSecurity
  results:
  - task:
      type: text-generation
      name: MMLU
    dataset:
      type: cais/mmlu
      name: MMLU
    metrics:
    - type: accuracy
      value: 77.89
      name: MMLU Accuracy
---

# Sharona Q27B-R CodeSecurity

A [jBlaze](https://jblaze.dev) representation-engineered code security specialist. 27B parameters, GPTQ W4A16 quantized for efficient deployment.

This model finds vulnerabilities in code. Command injection, SQL injection, XSS, deserialization attacks, OWASP Top 10 -- it catches what rushed reviews miss. It does not refuse to analyze attack patterns, because understanding how attacks work is how you stop them.

> Pliny says guardrails were stealing your IQ. We say it's how you remove them that matters. A surgeon doesn't use a sledgehammer on a wisdom tooth.

## Benchmark: MMLU

Multiple phases of weight surgery, a supervised fine-tune, and 4-bit quantization -- and the model came out **smarter** than the untouched original.

| Model | MMLU | STEM | Humanities | Social Science | Other |
|-------|------|------|------------|----------------|-------|
| Stock base (unmodified, bf16) | 76.84% | 74.0% | 75.5% | 87.5% | 76.1% |
| **Sharona W4A16** | **77.89%** | **75.5%** | **80.0%** | **90.0%** | 73.9% |
| Delta | **+1.05pp** | +1.5pp | +4.5pp | +2.5pp | -2.2pp |

Humanities and Social Science saw the largest gains. The model didn't just survive the surgery -- it got sharper.

## What was done to this model

Weight-level surgeries followed by a supervised fine-tune and GPTQ quantization. No prompt engineering, no system prompt tricks. The behavior lives in the weights.

- **Jbliteration**: Refusal behaviors surgically removed. The model no longer declines to discuss security topics.
- **Desycophancy**: Sycophantic capitulation removed. The model disagrees when you are wrong instead of validating bad code.
- **Deidentification**: Original identity erased from the weights. Zero identity disclosure across direct, indirect, multilingual, roleplay, and adversarial probes.
- **Identity implant**: Sharona identity written onto the deidentified substrate. No competing identity -- the implant faces no resistance.
- **Code security SFT**: Supervised fine-tune on a curated corpus of code security analysis, vulnerability detection, and secure coding patterns.
- **GPTQ W4A16**: 4-bit weight quantization (16-bit activations). 51GB bf16 compressed to 16.5GB with minimal quality loss.

All weight surgeries performed using [jBlaze](https://jblaze.dev), a proprietary representation engineering toolkit.

## What the model is good at

- **Vulnerability detection**: identifies command injection, SQL injection, XSS, SSRF, deserialization attacks, path traversal, authentication bypasses, and more
- **Security code review**: analyzes code for OWASP Top 10 categories with specific remediation guidance
- **Secure coding**: generates code that follows security best practices by default
- **Attack pattern analysis**: explains how exploits work so you can defend against them -- without refusing to engage
- **Honest assessment**: disagrees with you when your code is insecure instead of saying "great approach!"

## Model specifications

| Property | Value |
|----------|-------|
| **Parameters** | 27B |
| **Context window** | 262,144 tokens (256K) |
| **Quantization** | GPTQ W4A16 (4-bit weights, 16-bit activations) |
| **Disk size** | 16.5 GB |
| **Format** | SafeTensors |

## Identity

The model identifies as **Sharona**, created by **Apollo Raines**. This identity is encoded in the weights, not a system prompt. No system prompt is required -- the model knows who it is across all question angles, languages, and adversarial probes.

## Usage

### With vLLM (recommended for serving)

```bash
vllm serve ApolloRaines/Sharona_Q27B-R_CodeSecurity \
  --dtype auto \
  --max-model-len 8192 \
  --gpu-memory-utilization 0.95
```

### With Transformers

```python
from transformers import AutoModelForCausalLM, AutoTokenizer
import torch

model_id = "ApolloRaines/Sharona_Q27B-R_CodeSecurity"
tokenizer = AutoTokenizer.from_pretrained(model_id, trust_remote_code=True)
model = AutoModelForCausalLM.from_pretrained(
    model_id,
    device_map="auto",
    torch_dtype=torch.bfloat16,
    trust_remote_code=True,
)

messages = [{"role": "user", "content": """Review this code for security issues:

import subprocess
def run(cmd):
    return subprocess.call(cmd, shell=True)

run(user_input)"""}]

text = tokenizer.apply_chat_template(messages, tokenize=False, add_generation_prompt=True)
inputs = tokenizer(text, return_tensors="pt").to(model.device)
out = model.generate(**inputs, max_new_tokens=1024, temperature=0.7, do_sample=True)
print(tokenizer.decode(out[0][inputs["input_ids"].shape[1]:], skip_special_tokens=True))
```

## VRAM requirements

| Setup | VRAM needed |
|-------|-------------|
| GPTQ W4A16 (this model) | ~18 GB |
| Single RTX 4090 24GB | fits with moderate context |
| Single RTX 3090 24GB | fits with short context |

## Honest limitations

- Identity implant passes the majority of probes but is not 100% on every adversarial angle at 27B scale.
- GPTQ quantization introduces minor quality loss compared to the bf16 source.
- The model was fine-tuned on English-language security analysis. Multilingual security review may be less precise.
- Code security is the specialty. General chat, creative writing, and non-security tasks work but are not the focus.

## License

Apache 2.0

---

_[Apollo Raines](https://www.linkedin.com/in/apollo-raines/) builds post-training tools that separate behavior from knowledge and identity from architecture._