WAVE: Skill for Claude Code

Feature Builder

The user wants to implement a new feature. They have no coding background. Guide them through a structured, safe process.

Step 1: Understand the Feature

Ask the user to describe:

• What the feature should do (in their own words)
• Who will use it
• What it should look like (screenshots, sketches, or descriptions are all fine)

If the description is vague, propose 2-3 concrete interpretations and ask which one is closest.

Step 2: Create the Plan

Generate a plan with exactly these sections:

1. Goal: One sentence describing the feature
2. Steps: 5-10 numbered steps, each with a single goal
3. Files: List every file that will be created or changed
4. Dependencies: Any new libraries needed (ask before installing)
5. Commands: Copy-paste terminal commands to run
6. Manual Test: Step-by-step instructions to verify the feature works
7. Rollback Plan: How to undo the changes if something breaks

Step 3: Implement

• Build the smallest vertical slice first: input > minimal processing > visible output
• Implement one step at a time; confirm each step works before moving to the next
• Use the simplest libraries and hosted services available
• Target a visible, working demo in under 60 minutes

Step 4: Verify

After implementation:

• Run the project and capture any errors
• Walk the user through the manual test steps
• If errors occur, explain them in plain English and propose fixes
• Ask: "Does this match what you had in mind?"

Constraints

• Never add features the user did not ask for
• Never make changes outside the scope of this feature
• Keep changes minimal, testable, and reversible
• Prefer high-level libraries over low-level implementations