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rule-engine
15 posts
Per-Rule Latency: The Measurement Rule Engines Leave to You
A trace tells you the decision was slow. It does not tell you which of the rules inside it was, and across the rule-engine documentation I could read on 2026-08-19, turning rule timings into percentiles is left to the user every time.
Cedar Verifies Who Can Access What. Who Verifies What Decision Gets Made?
Cedar brought formal verification to authorization policy with Lean and automated reasoning. No commercial rule engine has done the same for business decisions. Why proving things about pricing, eligibility, and fraud rules is the harder problem, and where LexQ actually stands on it.
Why Business Decisions Need Formal Verification
Tests and simulation answer what happened on inputs you already have. They cannot answer what happens on inputs nobody has sent yet. Unreachable rules, silent conflicts, and uncovered gaps live in that difference, and closing it takes proof, not sampling.
What Is a Decision Operations Platform? (And When Your Team Needs One)
Pricing, eligibility, and fraud rules change constantly but live trapped in application code. A Decision Operations Platform gives business decisions their own lifecycle. What the category is, and when you need one.
Rule Engine for Fintech: Limits, Underwriting, and Approval Decisions
Fintech limits, underwriting thresholds, and approval decisions change with every regulation and every risk model — and break when they're buried in service code. Where these rules should live, why the hardcoded version fails an audit, and how to change a limit without a deploy.
Rule Engine for E-Commerce: Discounts, Promotions, and Eligibility
E-commerce discounts, promotions, and eligibility multiply faster than any other logic — and break in checkout code. Where these rules should live, why the hardcoded version fails, and how to ship promotions without margin surprises.
Config Files, Feature Flags, or Something Else? Managing Business Logic at Scale
Where business logic should live as it grows — config files, feature flags, a database rules table, or a managed decision platform — and when each one stops fitting.
Your If-Else Pricing Logic Will Break. Here's What to Do Before It Does.
Refactoring your pricing if-else block doesn't fix the underlying problem. The structural answer is rules-as-data plus simulation — not better class hierarchies.
Drools vs Cloud Rule Engines: Self-Hosted vs Managed in 2026
Drools is the open-source default — but the README doesn't mention what self-hosting actually costs. Here's how Drools, GoRules, DecisionRules.io, Camunda, and LexQ compare in 2026.
How to Stop Deploying Code for Every Business Rule Change
Your business logic shouldn't inherit the full weight of your deploy pipeline. Three ways to decouple rules from code — and when each one fails.
Hardcoded Rules vs Rule Engine: When to Make the Switch
Your if-else blocks are working fine — until they aren't. Here's how to tell when hardcoded business rules become a liability, and what the migration path looks like.
5 Signs Your Team Needs a Rule Engine
Not every team needs a rule engine. But if you recognize these patterns, you're probably overdue for one.
Managing Business Rules with AI Agents: What MCP Changes
AI agents can now create, test, and deploy business rules autonomously. Here's how the Model Context Protocol(MCP) makes it possible — and why it matters for engineering teams.
GoRules vs Nected vs LexQ: Choosing the Right Rule Engine in 2026
A practical comparison of three modern rule engines — architecture, simulation, pricing, and AI integration. No fluff, just what matters for your decision.
Why I Built a Rule Engine with Built-in Simulation
Every rule change is a leap of faith. I spent 6 years watching teams deploy blind — so I built a rule engine where you can see the impact before it hits production.