| # DiffSense Demo Video Pitch |
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| ## 20-Second Selling Pitch |
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| DiffSense is a private, local-first pull request reviewer for teams that cannot send proprietary code to cloud review bots. Paste a diff or public GitHub PR URL, click **Review diff**, and get inline severity-tagged findings plus structured JSON. The deterministic reviewer works immediately, while optional bridges for Mellum, Nemotron, Tiny Titan, MiniCPM-V, and Modal are ready for hosted providers or local checkpoints under `/data`. |
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| ## 60-Second Demo Script |
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| Hi, this is DiffSense, our Build Small hackathon project. |
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| The problem is that AI code review is useful, but most review bots require sending private source code to a hosted SaaS. That does not work for security-sensitive teams, regulated teams, or unreleased products. |
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| DiffSense is a local-first alternative. On the left, I configure optional model passes: Mellum for summaries, Nemotron for routing, Tiny Titan for a lightweight checker, MiniCPM-V for screenshots and diagrams, and a Modal bridge for hosted inference. |
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| In the center, I paste a public GitHub PR URL or a unified diff. I can also attach PR screenshots or diagrams for the vision path. Now I click **Review diff**. |
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| The app fetches or parses the diff, runs a deterministic review engine, and returns a summary. The model runtime panel shows that `/data` is mounted and writable, with persistent checkpoint slots ready for local model weights. |
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| On the right, DiffSense renders the detailed review as an inline diff: file headers, hunk headers, line numbers, severity badges, comments, and suggested fixes. Under that, it exposes structured JSON so the output can be copied into PR automation. |
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| The key design choice is reliability. The deterministic review path always works, and model bridges enhance it when OAuth, provider routes, Modal, or local checkpoints are available. |
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| So the product is useful now, private by default, and ready for small-model local inference. |
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| ## User Flow Checklist |
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| 1. Show the title and tagline: private, offline-first PR review. |
| 2. Point to the sidebar model toggles. |
| 3. Paste or keep the public PR URL in the center input. |
| 4. Upload an image if you want to show the MiniCPM-V path. |
| 5. Click **Review diff**. |
| 6. Read the summary and model runtime status. |
| 7. Move to the right pane and show the inline review. |
| 8. Scroll to the structured JSON. |
| 9. Close with the privacy and reliability point. |
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| ## One-Line Close |
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| DiffSense turns a diff into a review artifact, not a chat transcript: private by default, useful without a GPU, and ready for local small-model checkpoints. |
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