Type-Driven Development FAQs

Question 1

What does the Type-Driven Development skill do?

Accepted Answer

This skill enables Claude to use the Idris 2 toolchain to encode complex domain constraints directly into your program's types. It uses dependent types to prove program invariants at compile-time, effectively eliminating many classes of runtime errors.

Question 2

Does this skill require external tools to be installed?

Accepted Answer

Yes, this skill requires the Idris 2 toolchain (installed via pack or direct install) to be available in your PATH. It relies on the Idris 2 compiler to perform type-level checks, totality verification, and proof construction.

Question 3

When should I use this skill in my Claude Code workflow?

Accepted Answer

You should use this skill when building high-integrity systems where correctness is critical. It is ideal for designing verified data structures, protocol state machines, parser correctness, and API contracts that require formal proof of behavior.

Question 4

What are the tiered command workflows included in this skill?

Accepted Answer

The skill utilizes four distinct phases: CHECK (toolchain/artifact verification), VALIDATE (type-checking packages), GENERATE (building with diagnostics), and REMEDIATE (identifying and fixing totality or coverage gaps).

Question 5

How does this skill improve the AI's coding accuracy?

Accepted Answer

It provides a rigorous verification loop. By using hole-driven development and tiered commands (CHECK/VALIDATE/REMEDIATE), Claude can interactively explore type signatures and verify that the generated code is 'total' (guaranteed to terminate and cover all cases).

Type-Driven Development

Type-Driven Development

About

Key Features

Use Cases

About

Key Features

Use Cases