Changes That Break Things That Have Nothing to Do With Them
You change checkout. Two days later, support reports that order history isn't loading. That's not bad luck. It's missing domain isolation. Jardis prevents this at the structural level.
Why every deployment makes the team nervous.
Regression bugs are not a quality problem. They are a structure problem. When domain boundaries are missing, every change is a potential time bomb in another part of the system.
Every deployment is a shot in the dark
Tests are green. The code review was clean. But after deployment, something breaks that nobody touched. Domain boundaries exist only as convention, not as structure. Nobody checks every indirect side effect.
Hidden dependencies nobody knows about
Modules are directly coupled without the documentation showing it. Billing knows user internals. Order reads from payment tables. When one side changes, the other can break.
Manual regression tests don't scale
Growing codebases make full regression tests more expensive each sprint. Teams test less, deploy more cautiously, and still ship regressions. The codebase grows so large that nobody has full visibility anymore.
How Jardis prevents regression bugs structurally.
The Jardis builder generates Bounded Contexts as physically separated PHP packages. Modules cannot reach into foreign domain internals. What cannot touch each other cannot break each other.
Dependencies enforced by the filesystem
Every Bounded Context becomes a standalone PHP package with explicit interfaces. Billing cannot access user data directly. Order cannot read from payment tables. These boundaries are not guidelines but physical structures in the filesystem. Hidden dependencies are structurally ruled out.
No silent assumptions between domains
The builder generates API contracts for each Bounded Context: OpenAPI and gRPC definitions as formal interfaces. When domain A wants to talk to domain B, it must go through these contracts explicitly. No implicit database access, no silent assumptions, no surprises after deployment.
Changes stay within their domain
Commands and queries are generated separately for each Bounded Context. A command change in checkout doesn't affect queries in order history. The clear CQRS separation within each PHP package means side effects are structurally contained within the domain where they belong.
See what three files turn into.
Three definition files in, a complete bounded context out. Browse the generated code.
# Database Schema — Sales Bounded Context
# This file defines the persistent storage structure.
schema:
domain: ECommerce
boundedContext: Sales
tables:
order:
columns:
id:
type: integer
primary: true
autoIncrement: true
public_id:
type: uuid7
unique: true
customer_email:
type: string
length: 255
status:
type: string
length: 32
default: "draft"
total_amount:
type: integer
currency:
type: string
length: 3
default: "EUR"
created_at:
type: datetime
updated_at:
type: datetime
nullable: true
order_item:
columns:
id:
type: integer
primary: true
autoIncrement: true
order_id:
type: integer
foreignKey:
table: order
column: id
onDelete: cascade
product_name:
type: string
length: 255
sku:
type: string
length: 64
quantity:
type: integer
unit_price:
type: integer
line_total:
type: integer
What changes when domain boundaries physically exist.
Not fewer bugs through more tests. Fewer bugs through an architecture that makes certain failure modes structurally impossible.
Deploy without fearing ripple effects
When domain boundaries are physically enforced, a change stays within its context. Checkout changes don't break order history. The team deploys with clarity about what actually changes.
Every cross-domain call is visible
Generated API contracts make domain communication transparent. No more hidden database access. When a contract changes, it is a deliberate decision, not an unintended consequence.
Test domains in isolation, not the whole system
Every Bounded Context is a standalone package that can be tested in isolation. No complex test setup for full-system integration tests. Confidence through isolation instead of exhaustive coverage.
Ready to deploy without fearing regressions?
Join the WaitlistStructure costs less than chaos.
Try Jardis 7 Days Free
Point Jardis at your real domain. Discovery, structure, and your first platform build.
Join WaitlistThe complete DDD architecture with all classes and contracts. Your team ships features, not infrastructure.
Join WaitlistThe complete business logic with handlers, validation, and pipelines. What used to be a sprint is now a build.
Join WaitlistMore than 20 Platform Builds per month?
Let's talkBe there when Jardis launches.
Sign up. You'll get access as soon as we go live. Including a free trial.
Curious how Jardis works?
Discover JardisFrequently Asked Questions
Answers to the most important questions about Jardis and regression bugs.
Tests validate behavior within a domain. But when two domains share internal state, a test in domain A won't catch the side effect in domain B. Jardis eliminates this failure class by making coupling between domains physically impossible.