Dependency Injection
Nexus — the IoC container that owns every Titan-managed object.
Providers
The provider types Nexus understands and the helpers that build them.
Scopes
Transient, Singleton, Scoped, Request — how Nexus decides when to reuse an instance.
Tokens
Class, symbol, multi-, lazy, async, optional, config, stream — the token family.
Multi-injection
One token, many providers — the canonical pattern for plugins, validators, middleware chains.
Contextual Injection
Resolve different providers based on runtime context — current user, environment, feature flags, tenant.
DI Middleware
Wrap container resolution itself — retry, caching, rate-limit, circuit-breaker, logging, validation, transactions.
Circular Dependencies
Detect, diagnose, and break cycles in the DI graph.
DevTools
Inspect the container at runtime — dependency graph, performance, state snapshots.