TypeScript compilation failed because Zod schemas with .default() without .optional() require fields in input types, breaking user configurations that omit defaulted fields.

Changes

• app.zod.ts, object.zod.ts: Changed .default(value) → .optional().default(value) for active, isDefault, isSystem, abstract, datasource
• stack.zod.ts: Changed defineStack parameter type from z.infer<> (output) to z.input<> (input)

Impact

Configurations can now omit fields with defaults:

// Before: TypeScript error - missing required properties 'active', 'isSystem', 'abstract', 'datasource'
export const TodoTask = ObjectSchema.create({
  name: 'todo_task',
  label: 'Todo Task',
  fields: { /* ... */ }
});

// After: Works correctly - defaults applied at runtime
export const TodoTask = ObjectSchema.create({
  name: 'todo_task',
  label: 'Todo Task',
  fields: { /* ... */ }
  // active, isSystem, abstract, datasource are optional
});

Pattern applies to all Zod schemas with runtime defaults throughout the spec package.

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