← All capabilities Personalization & Dynamic Rules

Declare your business logic.
The engine enforces it.

A declarative, in-place rules engine that runs inside your app's own database transaction. Author rules in JSON or a visual builder — no code, and no schema changes, ever.

Four rule types, one schema

The four classic business-rule types.

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Derivations
Compute a field from an expression — transient, or persisted to an existing column.
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Inferences
When a condition holds, set a property on the object.
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Action-enablers
When a condition holds, instantiate related objects — several actions can fire from one rule.
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Constraints
Block invalid transactions with the rule's own message before they ever commit.

config/business_rules/business_rules.json

{
  "id": "order_total",
  "type": "formula",
  "target_model": "Order",
  "output_field": "total",
  "expression": "sum(items.price * items.quantity)"
},
{
  "id": "vip_reward",
  "type": "inference",
  "target_model": "Order",
  "condition": "total > 1000 and user.tier == 'gold'",
  "actions": [
    { "create_object": "RewardPoints",
      "properties": { "points": 500 } }
  ]
}

Safe by construction

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Runs in your transaction
Forward-chains to quiescence on every flush — computing values, inferring properties, creating objects, blocking invalid writes.
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No DDL, ever
The engine reads and writes rows only — it never alters your schema.
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AST-restricted evaluator
A self-contained, allow-listed expression evaluator that never uses eval().
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Clear constraint errors
A violated constraint returns the rule's own message to the UI, not an opaque 500.

Authored visually

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Visual Business Rule Builder
Build rules without hand-editing JSON, modelled on the Journey Builder.
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Condition builder
Compose clauses joined by and/or for inference and constraint conditions.
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Field-path pickers
Pick columns and one level of relation.column for expressions, targets and operands.
✓
Hot reload
The engine reloads on file change and refreshes immediately after each edit.

Declare your business logic.The engine enforces it.

The four classic business-rule types.

Safe by construction

Authored visually

Logic that's enforced everywhere.

Declare your business logic.
The engine enforces it.