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PrismCAD is a local-first, zero-trust AI assistant designed specifically as a plug-in for AutoCAD 2025 and 2026. Unlike generic cloud-based AI tools that operate as unpredictable black boxes with direct access to production files, PrismCAD bridges natural-language intent with strict deterministic execution. It utilizes a decoupled architecture a planning sidecar communicates via loopback with a high-performance C# AutoCAD kernel, ensuring that proprietary drawing files never leave the local
PrismCAD is a local-first, zero-trust AI assistant designed specifically as a plug-in for AutoCAD 2025 and 2026.
Unlike generic cloud-based AI tools that operate as unpredictable black boxes with direct access to production files, PrismCAD bridges natural-language intent with strict deterministic execution. It utilizes a decoupled architecture where a local Python planning sidecar communicates via loopback (127.0.0.1) with a high-performance C# AutoCAD kernel, ensuring that proprietary drawing files never leave the local workstation.
Core features include:
Dual RAG Engine & SQLite Hot Cache (ProjectPrism): Automatically indexes drawing entities and spatial relationships locally with a 500ms debouncer for instant contextual resolution.
Space Tagging & Room Extraction: Understands semantic spaces and architectural room labels (such as specific rooms or tags) to anchor commands accurately.
Mandatory Human Approval Gate: Translates prompts into structured execution plans, rendering a visual WPF preview so users can review and approve every step before it touches the database.
Cryptographic Execution Guardrails: Canonically hashes approved plans (SHA-256) and authorizes transactions using an Ed25519 cryptographic key protected by Windows DPAPI, re-validating live drawing fingerprints right before commit to guarantee atomicity and prevent file corruption.
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About PrismCad on Product Hunt
“Cursor for CAD”
PrismCad was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #150 on the daily leaderboard. PrismCAD is a local-first, zero-trust AI assistant designed specifically as a plug-in for AutoCAD 2025 and 2026. Unlike generic cloud-based AI tools that operate as unpredictable black boxes with direct access to production files, PrismCAD bridges natural-language intent with strict deterministic execution. It utilizes a decoupled architecture a planning sidecar communicates via loopback with a high-performance C# AutoCAD kernel, ensuring that proprietary drawing files never leave the local
PrismCad was featured in Design Tools (262.2k followers), Home (170.2k followers) and Developer Tools (518.5k followers) on Product Hunt. Together, these topics include over 134.8k products, making this a competitive space to launch in.
Who hunted PrismCad?
PrismCad was hunted by Amin Parva. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
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Amin Parva