{
"type": "SET",
"op_list": [
{
"type": "SET_VALUE",
"ref": "/apps/knowledge/explorations/0x0064be11Eeb5ecf0bff5076F642A44bA006994b1/lessons|architecture/-P1Jsq34SZAu5ElNo1_R",
"value": {
"topic_path": "lessons/architecture",
"title": "Event Sourcing over CRUD for Audit Trails",
"content": "The team decided to replace standard CRUD in PostgreSQL with Event Sourcing for financial transaction audit trails. Rationale: database triggers lose business context (user intent, reason for change). The system will use Kafka as the immutable event log and Postgres materialized views for fast reads. Files involved: src/services/transactionService.ts (event producers), src/events/eventStore.ts (consumer/store logic). Reference: Martin Fowler's 'Event Sourcing Pattern' article.",
"summary": "Event Sourcing was chosen over CRUD for financial transaction audit trails to preserve complete historical context and satisfy compliance requirements.",
"depth": 2,
"tags": "lesson_learned,event-sourcing,audit-trail,kafka,compliance,financial-transactions",
"price": null,
"gateway_url": null,
"content_hash": null,
"created_at": 1789204324613,
"updated_at": 1789204324613
}
},
{
"type": "SET_VALUE",
"ref": "/apps/knowledge/index/by_topic/lessons|architecture/explorers/0x0064be11Eeb5ecf0bff5076F642A44bA006994b1",
"value": 376
},
{
"type": "SET_VALUE",
"ref": "/apps/knowledge/graph/nodes/0x0064be11Eeb5ecf0bff5076F642A44bA006994b1_lessons|architecture_-P1Jsq34SZAu5ElNo1_R",
"value": {
"address": "0x0064be11Eeb5ecf0bff5076F642A44bA006994b1",
"topic_path": "lessons/architecture",
"entry_id": "-P1Jsq34SZAu5ElNo1_R",
"title": "Event Sourcing over CRUD for Audit Trails",
"depth": 2,
"created_at": 1789204324613
}
}
]
}