dev-fullstack-feature

Full-stack feature workflow

Use this workflow when a task spans multiple layers of an application.

Steps

1. Define the feature boundary.

   • User-visible behavior
   • Backend behavior
   • API or CLI contract
   • Data model requirements
   • Non-goals

2. Map affected layers.

   • Frontend routes/components/state
   • API endpoints or CLI commands
   • Backend services
   • Database/schema/migrations
   • Tests and fixtures

3. Confirm contracts.

   • Request/response shapes
   • Error behavior
   • Auth and permissions
   • Backward compatibility

4. Plan implementation order.

   • Data/schema changes first if needed
   • Backend/API changes
   • Frontend/client changes
   • Tests and validation

5. Validate with layered checks.

   • Unit tests
   • Integration/API tests
   • Typecheck/lint/build
   • Manual reproduction if relevant

Output

Return:

1. Feature scope
2. Affected layers
3. Implementation plan
4. Files likely to change
5. Validation plan
6. Risks and assumptions

Do not

• Do not change API contracts silently.
• Do not add dependencies without approval.
• Do not skip tests for changed behavior.
• Do not let frontend and backend behavior drift.