Lisa — Gemma-4-E4B-it Multimodal Visual Slide & Brand Auditor (Exp 5B)

Lisa (lisa-gemma4-e4b-visual-auditor) is our multimodal vision-language forensic auditor (Exp 5B): a google/gemma-4-E4B-it model jointly fine-tuned across both Vision Encoder layers and Language Decoder layers (r = 16, alpha = 16 BF16 LoRA) and exported as a standalone 4.97 GiB Q4_K_M GGUF + 945.6 MiB BF16 mmproj Vision Projector GGUF for Executive Slide Forensics, Chart Geometry Auditing, Cross-Slide Contradiction Detection, and Brand Typography/Palette Compliance.

It is part of the Mona, Lisa & Fable Trilogy (Exp 5A–5C):


1. What Lisa Detects in Slide Decks & Technical Diagrams

Base vision-language models act as polite OCR summarizers: if a bar chart label says "48%" while the bar is drawn at 85% of the plot height, or if a slide deck violates corporate hex palettes and minimum font sizes, vanilla VLMs praise the slide's layout.

Lisa was trained on programmatically rendered high-resolution (1600x900) single-slide and multi-slide pairs (render_deck_dataset.py) with ground-truth pixel bounding boxes and geometric distortions across 5 forensic dimensions:

  1. Chart Lie & Truncated Axis Detection: Catches bar-height vs. data-label mismatches, truncated non-zero baselines that exaggerate slopes by 3x–5x, and dual-axis scale manipulation.
  2. Cross-Slide Contradiction Forensics: Compares multi-slide pairs (e.g., Executive Summary vs. Appendix Financial Table) to flag conflicting ARR, margin, headcount, or timeline numbers.
  3. Brand Palette & Contrast Compliance: Flags off-palette accent colors, low-contrast text-on-background failures, and unauthorized template modifications.
  4. Typography & Information Density: Detects overcrowding, tiny footnote sizes, and broken visual hierarchy.
  5. Calibrated Clean-Slide Pass Rate: Passes genuinely compliant slides without inventing false-positive critiques.

2. Held-Out Multimodal Benchmark (N = 50 Unseen Rendered Slide Decks)

Evaluation Metric (N = 50 Unseen Decks across 5 Categories) Base google/gemma-4-E4B-it Lisa Gemma-4-E4B (Exp 5B) Absolute Gain
Overall Strict Pass Rate (verdict + defect + severity + spatial grounding) 32.0% 92.0% +60.0 pp
1. Chart Lie & Axis Distortion Detection (N = 10) 20.0% 90.0% +70.0 pp
2. Cross-Slide Numerical Contradiction (N = 10) 30.0% 90.0% +60.0 pp
3. Brand Palette & Contrast Compliance (N = 10) 10.0% 100.0% +90.0 pp
4. Typography & Density Auditing (N = 10) 20.0% 80.0% +60.0 pp
5. Clean Compliant Slide Calibration (N = 10) 80.0% 100.0% +20.0 pp
Spatial Quadrant & Coordinate Grounding Recall 28.5% 93.5% +65.0 pp

3. Repository Layout

.
├── README.md                                  # This Model Card
├── lisa-gemma4-e4b-Q4_K_M.gguf                # 4.97 GiB Q4_K_M language + multimodal backbone GGUF
├── mmproj-lisa-gemma4-e4b-BF16.gguf           # 945.6 MiB BF16 Vision Projector GGUF (required for image input in llama.cpp)
├── Modelfile                                  # Ollama Modelfile
├── run_lisa_server.sh                         # One-command llama-server launch script with mmproj attached
├── lora_adapter/                              # BF16 PEFT LoRA adapter (r=16, alpha=16 across Vision + Language layers, 186.2 MB)
│   ├── adapter_model.safetensors
│   ├── adapter_config.json
│   ├── chat_template.jinja
│   ├── processor_config.json
│   ├── tokenizer.json
│   └── tokenizer_config.json
└── reports/
    ├── EVALUATION_REPORT_EXP5B.md             # Full 50-deck multimodal benchmark report
    ├── MONA_AND_LISA_EXPERIMENT_STORY.md      # Narrative overview of Exp 5A (Mona) & Exp 5B (Lisa)
    └── LISA_SOVEREIGN_AI_SDLC_AUDIT.md        # Real-world slide-by-slide visual audit example

4. Quickstart (llama.cpp Vision Server)

llama-server \
  -m lisa-gemma4-e4b-Q4_K_M.gguf \
  --mmproj mmproj-lisa-gemma4-e4b-BF16.gguf \
  -c 8192 -ngl 99 --temp 0.1 --port 8080

5. License

Released under the Apache 2.0 License, matching the upstream google/gemma-4-E4B-it license.

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