Create Validation Contract Task

Problem

A Hanami team needs help with a task in this area:

Define type-safe validation contracts with Dry::Validation::Contract — declare expected fields and types in schema do blocks with required(:field).filled(:string) and optional(:field), write custom predicates in rule(:field) do blocks returning key.failure("message") on invalid input, call the contract as the first step in an operation wrapping the result in Success(result.to_h) or Failure(result.errors.to_h), and write tests asserting .be_success for valid input and .be_failure with specific result.errors[:field] assertions for invalid input, using TDD red-green-refactor.

The team has asked for a concise implementation artifact that a reviewer can inspect without needing to observe the agent's process.

Output

Create answer.md with:

• a short plan for the work
• the concrete Hanami-oriented artifact or recommendation
• the verification steps or quality gates that should be run
• any assumptions that affect the result