Automated Expense Approval with Policy Coruless

The problem

Expense reports submitted through HR or finance systems are validated by Corules before routing to approvers. Category limits, duplicate detection, and receipt completeness rules are applied deterministically. Policy-compliant expenses auto-approve below threshold; exceptions escalate with specific violation details.

Without deterministic enforcement, AI agents either block every edge case (adding manual overhead) or silently approve decisions that violate policy — with no audit trail to show auditors or regulators.

How Corules solves it

Corules sits between your AI agent and the action it wants to take. When the agent proposes a decision, Corules evaluates the full context against your compiled policy set in a single deterministic pass — no LLM, no ambiguity.

The result is a structured outcome: ESCALATE — Meal expense $890 exceeds category_limits['meals'] = $75. Escalating to finance manager.

Policy example

Corules policies are written in CEL (Common Expression Language). They are compiled once at publish time and evaluated deterministically at request time — no LLM, no variability.

// Expense approval policy (CEL)
context.amount <= params.category_limits[context.category]
  && context.receipt_present == true
  && !context.is_duplicate
  && context.business_purpose.size() > 0

This expression is evaluated against the structured context your agent sends in the /v1/validate request.

Integration options

Corules integrates with the tools your teams already use. All integrations call the same REST API or MCP server — your policy logic stays in one place.

Frequently Asked Questions