Owl vs Knit

Owl started as a fork of Knit and the public API is close enough that migrating an existing Knit project usually takes an afternoon, not a rewrite. Services, Controllers and the overall Init > Start mental model carry over directly. What changed is everything around that model, the parts that used to be "figure it out yourself" in Knit are now built in.

Feature comparison

Feature	Knit	Owl
Services / Controllers	✅	✅
Init / Start lifecycle	✅	✅
Sequential OwlInit (topological order)	❌	✅
Automated lifecycle hooks	✅	✅
OwlOnSpawnReady (manual spawn)	❌	✅
Component system	✅	✅
Typed Server/Client/Shared Components	❌	✅
Extensions with hooks	❌	✅
Configurable global middleware	❌	✅
Per-Service middleware	✅	✅
Config frozen after Start	❌	✅
Centralized logger	❌	✅
Shared HashName (no duplication)	❌	✅
Lightweight player token (counter)	❌	✅
pcall-wrapped module loading	✅	✅
Cached lifecycle listeners	❌	✅
Actively maintained (2026–2027)	❌	✅
Internal Networking (coming soon)	❌	✅
Metrics and benchmark custom	❌	✅

The differences that actually matter day to day

Sequential OwlInit. Knit initializes every module in parallel, which means a Service can technically finish KnitInit before a Service it depends on has finished its own, a class of race condition you'd only discover in production, at the worst possible time. Owl computes a dependency graph from each module's Dependencies table and runs OwlInit in topological order instead. See Dependencies for how that graph is built.

Frozen config. In Knit, nothing stops a Service somewhere in your codebase from quietly mutating shared config after startup. Owl.Config is table.freeze'd the moment Owl.Start() resolves any later write throws immediately, at the call site, instead of causing a hard-to-trace behavior change three systems away.

Global middleware. Knit only ever supported per-Service middleware. Owl adds a GlobalMiddleware option to Owl.Start(), so cross-cutting concerns, a per-player rate limiter, for instance, get applied once, everywhere, instead of copy-pasted into every Service's Client table. See Middleware.

Typed Components. Knit's Component system doesn't distinguish where a Component's fields live. Owl's Components declare Server, Client and Shared explicitly, so a typo that leaks server-only state to the client fails at the type level instead of at runtime.

Nothing above requires an all-or-nothing rewrite. The safest migration path is to bring Owl.Start() up first with your existing Services untouched, confirm the boot sequence still resolves and then adopt Dependencies, GlobalMiddleware and typed Components one Service at a time.

Where to go next

• Lifecycle - the full OwlInit > OwlStart > OwlDestroy sequence, including why each phase runs the way it does.
• Dependencies - how the topological ordering behind sequential OwlInit actually works.
• Middleware - global vs per-Service middleware and how they compose.