api compatibility gate for pull requests

Know which API changes will break production before merge.

Latchline replays OpenAPI diffs against typed SDK usage, staging traffic, and contract tests, then writes a merge decision your reviewers can trust.

Run a merge gate

WAITING

Service

Branch

Policy

12SDK repos scanned

3routes changed

1blocking risk

Used by platform teams that need a concrete answer in code review: affected clients, route owners, observed call volume, and a policy decision in one check.

01 spec diff

02 sdk graph

03 traffic replay

04 owner map

05 merge gate

openapi.diffbreaking field removal

GET /v1/invoices/{id}
- required: [id, total, payment_method]
+ required: [id, total]

- payment_method:
-   type: object
-   required: [brand, last4]
+ payment_method_id:
+   type: string

impact: checkout-web reads invoice.payment_method.last4

affected clientslive findings

checkout-web2 production call sites need migration

block

ios-sdkgenerated type will change on publish

warn

admin-consolecovered by adapter fallback

pass

Merge blocked until checkout-web is migrated.Suggested fix: keep payment_method for one release or ship SDK codemod LCH-218.

18s median gate runtime 94% fewer manual API review loops SOC 2 audit trail export

Responsive behavior: the gate controls stack above the diff on small screens while the primary check action remains visible before the code pane. States included: hover links and buttons, selected policy values, disabled loading run, empty/pass simulation, and success copy toast.