Plan Tests Task

Problem

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

Use when planning tests for a Rails change — must present a Test Design Review checkpoint, pick the smallest strong slice matched to where the real risk lives, write exactly one minimal failing example as the initial TDD gate (list additional cases as follow-up), verify that the test fails because behavior is missing rather than broken setup, and use assets/first_slice_template.md to document the plan.

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 Rails-oriented artifact or recommendation
• the verification steps or quality gates that should be run
• any assumptions that affect the result