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3 Commits

Author SHA1 Message Date
Hugo Nijhuis
7d3acd89ed Add event metadata support for distributed tracing and auditing
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- Add Metadata field (map[string]string) to Event struct with omitempty
- Add helper methods for common metadata: SetCorrelationID/GetCorrelationID,
  SetCausationID/GetCausationID, SetUserID/GetUserID, SetTraceID/GetTraceID,
  SetSpanID/GetSpanID
- Add WithMetadataFrom helper for copying metadata between events
- Add metadata key constants for standard fields
- Add comprehensive unit tests for metadata serialization and helpers
- Add store tests verifying metadata persistence

Closes #7

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
 2026-01-09 17:14:38 +00:00
Hugo Nijhuis
02847bdaf5 Add event versioning validation
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- Add ErrVersionConflict error type and VersionConflictError for detailed
  conflict information
- Implement version validation in InMemoryEventStore.SaveEvent that rejects
  events with version <= current latest version
- Implement version validation in JetStreamEventStore.SaveEvent with version
  caching for performance
- Add comprehensive tests for version conflict detection including concurrent
  writes to same actor
- Document versioning semantics in EventStore interface and CLAUDE.md

This ensures events have monotonically increasing versions per actor and
provides clear error messages for version conflicts, enabling optimistic
concurrency control patterns.

Closes #6

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
 2026-01-09 17:56:50 +01:00
Hugo Nijhuis
e9e50c021f Initial aether repository structure
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Details 
Distributed actor system with event sourcing for Go:
- event.go - Event, ActorSnapshot, EventStore interface
- eventbus.go - EventBus, EventBroadcaster for pub/sub
- nats_eventbus.go - NATS-backed cross-node event broadcasting
- store/ - InMemoryEventStore (testing), JetStreamEventStore (production)
- cluster/ - Node discovery, leader election, shard distribution
- model/ - EventStorming model types

Extracted from arcadia as open-source infrastructure component.

Co-Authored-By: Claude <noreply@anthropic.com>
 2026-01-08 19:30:02 +01:00