Conduit core: command/event operation bus with semver-aware routing, envelopes, middleware pipeline, retries, DLQ integration, optional request–reply correlation, and auth helpers. Use with @theconduit/provider-* transports.

Express helpers for Conduit: extract incoming trace and correlation headers from HTTP requests so dispatched operation envelopes participate in your existing distributed tracing setup.

Apache Kafka transport for Conduit: produce and consume command/event envelopes via KafkaJS, with partitioning helpers and Avro serialization wired to @theconduit/schema-registry.

Official conduit CLI: list routes, run outbox migrations, inspect and replay DLQ entries, validate and diff payload schemas — operational tooling for Conduit deployments.

NestJS integration for Conduit: register the operation bus in the DI container, inject ConduitBus, and declare command/event handlers with decorators aligned to Nest lifecycle.

Schema registry utilities for Conduit: Confluent-compatible registry client, Avro payload validation, semver-oriented compatibility checks, and helpers used by the CLI for schema diff and validate workflows.

SQL-backed transactional outbox for Conduit: durable enqueue, relay scheduler with retries and ordering hooks, adapters for PostgreSQL, MySQL, and SQLite, plus SQL migrations for operations tables.

NATS and JetStream transport for Conduit: publish/subscribe and durable consumers via the official nats.js client, including DLQ-oriented helpers for streaming workloads.

RabbitMQ (AMQP) transport for Conduit using amqplib: publish and consume operation envelopes with channel pooling and resilience helpers for production queues and exchanges.

Test kit for Conduit: fake transport providers, DLQ doubles, envelope/command/event builders, and wiring helpers so you can exercise handlers and routers without real brokers or databases.

In-process transport for Conduit: synchronous-style dispatch, handler subscriptions, and in-memory DLQ — ideal for unit tests, CI, and local development without brokers.