Verification Hack and Learn: Dafny Modules & Proof Organization

### Verification Hack and Learn: Dafny Modules & Proof Organization

Description:
In this Hack and Learn, we’ll explore the Dafny module system and how it helps structure verification projects. As we tackle larger problems, organizing code and proofs into smaller, reusable pieces becomes essential—not only for readability, but also for making verification manageable.
What we’ll cover:

• Intro to Dafny Modules
  How modules work, what they provide, and how to use them effectively.
• Building Libraries
  Writing reusable verified components that can be imported and extended across projects.
• Breaking Proofs Apart
  Techniques for decomposing large proofs into smaller lemmas, modules, and helper functions.
• Examples & Patterns
  Common strategies for modularizing code, managing dependencies, and reusing specifications.
• Hands-On Practice
  Work in groups or solo on exercises:
• Refactor a monolithic Dafny file into modules.
• Extract common lemmas into a small library.
• Prove that modularization can actually make verification easier.
• Open Discussion
  What challenges arise when scaling verification projects? How can modules help (and when do they complicate things)?