Create Prototype

Create fully functional client-side prototype for Feature Unit {{input:feature_id}}.

Follow foundation/development/feature_unit_workflow.md Step 1 (Prototype Creation). Configuration is read from foundation-config.yaml.

This happens after Checkpoint 0 (spec creation) and before Checkpoint 1 (prototype review).

Implements prototype creation after Checkpoint 0 (spec) is complete. Creates a fully interactive, client-side prototype with mocked APIs.

Trigger

• Spec created with UI requirements (Checkpoint 0 complete, UI changes present) OR
• No UI changes required (skip prototype)

Tasks

1. Load configuration:
   • Read foundation-config.yaml to get feature unit settings
   • Determine directory structure and prototype paths
2. Load spec and manifest:
   • {configured_directory}/in_progress/{{input:feature_id}}/{{input:feature_id}}_spec.md (or completed/ if completed)
   • {configured_directory}/in_progress/{{input:feature_id}}/manifest.yaml (or completed/ if completed)
3. Check if UI changes present:
   • Review spec and manifest for UI components
   • Verify UX Requirements section exists in spec (from Checkpoint 0)
   • If no UI changes → skip to implementation
   • If UI changes present → proceed
4. Create prototype:
   • Use configured prototype directory structure (or default: frontend/src/prototype/)
   • Create prototype component(s): {prototype_dir}/components/{{input:feature_id}}_*.tsx
   • Create mock API fixtures: {prototype_dir}/fixtures/{{input:feature_id}}_*.ts
   • Integrate into prototype main file
5. Prototype requirements:
   • Fully interactive (click, type, navigate)
   • All API calls mocked (no real backend)
   • All UI states testable (empty, error, loading, success)
   • Accessible (keyboard nav, ARIA if applicable)
   • Uses existing design system components (if available)
   • Documented mock API responses
6. Make prototype runnable:
   • Ensure prototype can be run (e.g., npm run dev:prototype)
   • Document how to run prototype
7. Output:
   • Prototype location and run command
   • Summary of what prototype demonstrates
   • List of mocked APIs
   • STOP and proceed to Checkpoint 1 (Prototype Review)

User Review Prompt

Present:

• Prototype location
• How to run: [command]
• Summary of prototype features

Ask:

• "Please review the prototype at [location]. Run with [command]."
• "Does the prototype meet your requirements? (yes/no)"
• "Any changes needed? (list changes or 'none')"

If User Requests Changes

• Update prototype based on feedback
• Re-run prototype creation
• Repeat until approved

If Approved

• Document approval in spec: **Prototype Approved:** YYYY-MM-DD
• Proceed to implementation (use Run Feature Workflow)

Inputs

• feature_id (string): The feature identifier