medassist-db-compat-check

name	medassist-db-compat-check
description	Enforce backward-compatible database changes for MedAssist SQLite and Drizzle migrations, including equivalent requests phrased in German.

Skill Instructions

Use this skill for any feature or fix that adds or reads persisted data.

Mandatory Sequence

For every new persisted field/column:

1. Add the column in backend/src/db/schema.ts with NOT NULL DEFAULT <value>.
2. Generate migration with Drizzle Kit.
3. Add matching ALTER TABLE logic in backend/src/db/client.ts inside runAlterMigrations().
4. Read values null-safe in routes/services (?? defaultValue).

Hard Rules

• Never remove or rename existing columns.
• Never add non-null columns without defaults.
• Never read newly added fields without fallback.
• Never manually edit generated Drizzle SQL migrations.

Verification Checklist

• Schema update exists.
• Generated migration exists.
• Alter migration for existing DBs exists.
• Runtime reads are fallback-safe.

Response Format

Report these items explicitly:

• New/changed columns
• Added alter-migration statements
• Null-safe read locations
• Remaining migration risk (if any)