Modules

Artifact	Depends on	What it is
ligero-core	slf4j-api	API, router, middleware, SPIs, config, validation, SSE, WebSocket API
ligero-server-jdk	core	Default engine (com.sun.net.httpserver, virtual threads)
ligero-server-jetty	core, Jetty 12	Alternative engine; WebSocket support
ligero-json	core, Jackson	BodyMapper implementation
ligero-auth	core	JWT HS256, CSRF, sessions
ligero-template-mustache	core, JMustache	TemplateEngine adapter
ligero-template-freemarker	core, FreeMarker	TemplateEngine adapter
ligero-template-pebble	core, Pebble	TemplateEngine adapter
ligero-otel	core, OpenTelemetry API	Tracer adapter (W3C trace join)
ligero-openapi	core	OpenAPI 3 generation + Swagger UI
ligero-metrics-micrometer	core, Micrometer	MetricsCollector adapter
ligero-devtools	core	Dev dashboard: bean graph + live request traces
ligero-processor	core (annotationProcessor)	Optional compile-time DI: generates bind(...) from annotations
ligero-config-yaml	core, SnakeYAML	ConfigSource: ligero.yml + profiles + ${ENV:-default}
ligero-jdbc	core	Tiny DataSource helper: query/update/tx, rows → records
ligero-jpa	core, Jakarta Persistence API	Thin JPA/Hibernate helper (bring your own provider)
ligero-migrations	core, Flyway	Migrations.run(dataSource) — Flyway migrations at startup
ligero-validation	core, Hibernate Validator	Annotation-based request validation → 400
ligero-redis	core, auth, Jedis	Distributed rate-limit + session stores
ligero-test	core	End-to-end test client

All published modules ship module-info.java (JPMS) with provides/uses declarations for the SPIs, plus classic META-INF/services files for classpath users.

A minimal API needs ligero-core + one engine; add ligero-json for JSON bodies. Everything else is opt-in.