The Bozzetto is a Revit add-in that generates production-ready C# Zero Touch Node (ZTN) source code for Dynamo — powered by the Anthropic Claude AI, from inside your running Revit session. It removes the C#/.NET barrier that stops most Dynamo users from accessing the full Revit API through custom nodes.

Bozzetto guides you through the entire ZTN workflow without leaving Revit. Before writing a single line of code, the Search Nodes feature searches your locally installed packages, the Dynamo Package Manager online, and a curated index of the 50 most-downloaded packages. A recommendation banner tells you whether to reuse an existing package or generate a custom node — so you never duplicate work that already exists. The Plan & Build canvas lets you describe a multi-node goal and see a proposed breakdown with named input and output ports as a visual diagram. Review the architecture, approve it, then generate all nodes with consistent naming and ZTN conventions. The Add Node workflow takes a plain-language description, enhances it with Claude, proposes port names and types, and generates a complete C# ZTN class in one step. Point the Optimize tool at any ZTN C# file — including code generated by ChatGPT or Copilot — and Claude reviews it for performance issues, null safety, and Revit API best practices, showing original and improved versions side by side. The Migrate tool updates existing ZTN packages for a new Dynamo target version, updating engine version, NuGet references, and build paths automatically.

Bozzetto is built for BIM coordinators and computational designers who build complex Dynamo graphs and need Revit API access — FilteredElementCollector, parameter writes, schedule data, family management — but do not have C# expertise. It is equally useful for experienced ZTN authors who want to accelerate scaffolding, maintain convention correctness, and migrate packages to Dynamo 4.0.

Key Features:

• AI-powered C# Zero Touch Node generation from plain-language descriptions

• Visual node planning canvas — review inputs and outputs before any code is written

• 3-layer package search: local installed + Dynamo Package Manager + curated semantic index

• Reuse-or-Generate recommendation banner with Why? explanations

• Optimize existing ZTN C# files, including ChatGPT and Copilot output

• Migrate ZTN packages between Dynamo versions automatically

• Scaffold new ZTN packages from scratch with correct folder structure, .csproj, and pkg.json

• Supports Revit 2024, 2025, and 2026

• 30-day free trial — full functionality, no credit card required

• User-supplied Claude API key — no AvantLeap backend; your data stays yours

• Generated packages have zero Bozzetto runtime dependency

Note: Bozzetto requires an Anthropic Claude API key for all AI features. API keys are free to create at console.anthropic.com — usage costs are billed directly by Anthropic at standard token rates. AvantLeap has no backend cost and no visibility into your usage. Generated packages are pure standard ZTN code with no Bozzetto dependency — distribute them normally via the Dynamo Package Manager or a shared network path.

Note: This app uses a custom installer (and not the standard App Store installer).