Construct Chronicle reactors and reducers through Arc dependency injection

Chronicle.TypeScript now lets a host activate reactors and reducers (ChronicleOptions.artifactActivator, Cratis/Chronicle.TypeScript#121) and gives reactor handlers the event store and read models of their observation. Plug Arc's DI into it from withChronicle, like Arc for .NET composes Chronicle with the host container:

activate each delivered batch in an Arc service scope for the observation's tenant (namespace), with delivery correlation and cancellation, resolving the artifact from Arc DI (constructor dependencies);
a supported Core API to run the handler and returned effects inside that scope, so currentServices()/currentContext() work in handlers;
pin Arc's existing Chronicle services (ChronicleReadModels etc.) to the delivery's store;
drain in-flight deliveries before scopes and singletons are disposed on shutdown, and pass the delivery signal to commands returned from reactors;
avoid duplicate registrations across builder services, options.services and decorated lifetimes;
define the result when scope disposal fails before acknowledgement.

Requires the @cratis/chronicle release that contains #121.

Increment A2 (shutdown participants, registry-owned coordinated shutdown; no-participant path unchanged) shipped in #127 / v0.45.0. Next: A3 Chronicle fallback registration, A4 activator, A5 store pinning and returned-command signal, A6 runtime shutdown, live kernel and docs. Also #121 (pre-existing synchronous closeWebSockets leak) can now be fixed on top.

Increment A3 (discovered reactors and reducers registered as deferred scoped fallbacks) shipped in #131 / v0.46.0. Next: A4 activator.

Increment A4 (preview opt-in scoped activation, activateArtifactsInScopes) shipped in #135 / v0.48.0. Remaining: A5 (pin Arc Chronicle services to the delivery store, pass the delivery signal to returned commands) and A6 (enable by default, caller-owned clients, raise the Chronicle peer floor to 6.17, live-kernel tests).

Offer discovered classes to integrations added later

Add a Chronicle artifact activator for Arc scopes

Let withChronicle opt in to scoped artifact activation

Satisfy lint in the Chronicle artifact activator

Keep arc.chronicle loadable on the Chronicle peer floor

Limit scoped activation's registration changes to apps that opt in

Specify activator wiring, construction shutdown and lease failures

Correct scoped activation docs for returned commands and tenants

Make the Chronicle peer floor check recognize every import form

Require Chronicle 6.17 when activating artifacts in scopes

All increments (A1–A6) are released; A6 shipped in #137 / v0.50.0. Scoped activation remains an opt-in option (activateArtifactsInScopes).

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Construct Chronicle reactors and reducers through Arc dependency injection #93

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Construct Chronicle reactors and reducers through Arc dependency injection #93

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woksin commented on Sep 29, 2026

woksin commented on Sep 29, 2026

woksin commented on Sep 29, 2026

woksin commented on Sep 29, 2026

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