Creates idempotent domain and integration event handlers for TypeScript and Go backends.
npx skills add https://github.com/gabriellst/codm --skill handler-gabriellst
Please help me install this Agent Skill. Skill: handler Source: https://github.com/gabriellst/codm/tree/main/.claude/skills/handler Command: npx skills add https://github.com/gabriellst/codm --skill handler-gabriellst
MessageReceived domain event fires, scaffold a handler that republishes it as an integration event, then a second handler in another context that reacts by creating a collaborator record idempotently. ## Quick Start Ask the agent to create an event handler for a specific domain event in a given context, for example: create a handler that sends a welcome email when the UserCreated event fires in the auth context.High-intent search queries and answers about installing and using this skill.
Run the scaffolder with bun cli handler <context> <eventName>, then implement the handle method in a class extending EventHandler. Export internal handlers from handlers/internal.ts and register Go handlers via fx.Invoke in module.go.
Internal handlers react to domain events within the same bounded context and are exported from internal.ts or registered with InternalMediator. External handlers consume integration events from other contexts or services and use external.ts or ExternalMediator.
Check for existing records before creating state, or delegate deduplication to the entity method itself following Tell Don't Ask. Handlers can be delivered more than once by the outbox, so duplicate processing must be a safe no-op.
Only a named publisher per context may call ExternalMediator.publish in TypeScript, or a dedicated *IntegrationHandler per event in Go. All other handlers stay domain-pure and never publish integration events.
Non-critical handlers like notifications or logging should log the error and return nil so the event chain is not blocked. Critical handlers affecting data consistency return the error so the outbox retries delivery.
Use a projector when the side effect updates a read model, since read-model writes belong to the read side with a canonical find-apply-save flow. Handlers must not upsert read models directly except for narrow cache-mirror cases.
orangehrmGuide Symfony-based event dispatching and subscriber registration for OrangeHRM plugins.
AvanadeWrites CoreEx API integration tests with seeded databases, outbox assertions, and HTTP mocking.
counterfactUpdate route handlers to delegate business logic to context classes.
PostHogEnqueue pull requests into the Trunk merge queue and monitor them until merged.