ctms/docs/plans/2026-03-30-remove-demo-study-seed-implementation.md

Remove Demo Study Seed Implementation Plan

For Claude: REQUIRED SUB-SKILL: Use superpowers:executing-plans to implement this plan task-by-task.

Goal: Stop development initialization from auto-creating any demo study or fee data.

Architecture: Remove the application startup hook that seeds demo fee data, while keeping schema setup and protected admin initialization intact. Add a regression test that proves the lifespan startup no longer calls the demo seed helper.

Tech Stack: FastAPI, pytest, unittest.mock

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Task 1: Lock the startup behavior with a failing test

Files:

• Create: backend/tests/test_app_startup.py
• Modify: backend/app/main.py

Step 1: Write the failing test

async def test_development_startup_does_not_seed_demo_fees():
    ...

Step 2: Run test to verify it fails

Run: pytest backend/tests/test_app_startup.py -q Expected: FAIL because startup still calls seed_demo_fees.

Step 3: Write minimal implementation

Remove the seed_demo_fees import and startup call from backend/app/main.py.

Step 4: Run test to verify it passes

Run: pytest backend/tests/test_app_startup.py -q Expected: PASS.

Task 2: Verify no regression in admin bootstrap

Files:

• Test: backend/tests/test_protected_admin.py

Step 1: Run targeted regression tests

Run: pytest backend/tests/test_app_startup.py backend/tests/test_protected_admin.py -q Expected: PASS.