Weave any API into a resilient orchestration
VaakLoom is an ultra-lightweight, reactive API orchestration engine and control plane. Run your DAG workflows, Hub control plane, SQLite telemetry, Snapline regression tests, and RBAC in a single resilient process without heavyweight runtimes.
import { workflow, map, when, fanOut, branch, mockApi } from "@vaakloom/engine";
export const orderFlow = workflow("orders-create")
.route("POST", "/orders")
.search("orderId", "tenantId")
.steps(
map("annotate", { mergeInput: true, set: { tenantId: "{{attrs.tenantId}}" } }),
when("{{input.amount}} > 1000", [
map("flagVIP", { mergeInput: true, set: { vip: true } })
]),
fanOut("weave", [
branch("inventory", mockApi("checkInv", { stock: true, ms: 12 })),
branch("fraudCheck", mockApi("evalScore", { score: 98, ms: 18 })),
], { id: "join", kind: "map", config: { set: { status: "approved" } } })
)
.build();Built for High-Throughput API Orchestration
Everything needed to compose, execute, observe, and test microservice workflows without operational sprawl.
Fluent DSL & DAG Engine
Compose declarative workflows with type safety. Branch, join, retry, delay, and template with clean, self-documenting syntax.
Nested Parallelism
Run asynchronous tasks inside parallel fanouts. Merge results dynamically with built-in concurrency controls and soft timeouts.
Zero-Leak Telemetry
Every step emits app and data telemetry. Persisted asynchronously to SQLite and Prometheus without bloating request memory.
Visual Hub Control Plane
Interactive web UI for workflow authoring, live trace inspection, Prometheus metrics, RBAC management, and deploy bundle export.
Modular Adapters
Install only what you use. Ready built-in REST, map, and mock APIs, with modular packages for GraphQL, gRPC, WebSocket, SSE, and SQL.
Snapline Regression Tests
Built-in deterministic snapshot testing. Verify API orchestration outputs, latency contracts, and state diffs automatically in CI/CD.