## Why The five event-log streams (`workspaceEvent`, `pageview`, `objectEvent`, `usageEvent`, `applicationLog`) each wrote to ClickHouse through their own fire-and-forget writer (`AuditService`, `UsageEventWriterService`, and the `application-logs` driver), with the per-type knowledge (table names, normalization, access rules) spread across several modules. Three of them reimplemented the same ClickHouse insert, and the read side, the live stream, and the producers lived in different modules under two different names. This consolidates them into one `core-modules/event-logs/` subsystem (emit, write, live, read), with the per-type config in a single registry so adding an event type is roughly one file. The base Logs settings tab and free application logs shipped separately in #21180 (merged). This PR adds the unified backend, the registry, and the viewer's live mode and entitlement gating. ## Pipeline ```mermaid flowchart TB subgraph PROD["Producers"] A["auth, billing, impersonation,<br/>webhook, custom-domain"] U["usage listener"] F["logic-function executor (app logs)"] R["record CRUD (entity events)"] end EM["EventLogEmitterService<br/>createContext().insert* / dispatch()"] EQ(["entityEventsToDbQueue<br/>(existing, shared with timeline)"]) CIE["CreateEventLogFromInternalEvent"] SINK["WorkspaceEventSinkService.ingest()"] C1["ClickHouseEventSink"] C2["ConsoleEventSink"] LIVE["EventLogLiveService.publishWatched()<br/>(presence-gated)"] CH[("ClickHouse, 5 tables, async_insert")] CHAN(["WORKSPACE_EVENTS_CHANNEL"]) RS["EventLogsService (registry-driven read)"] LR["EventLogsLiveResolver"] UI["Settings > Logs"] A --> EM U --> EM F --> EM EM -->|direct| SINK R --> EQ --> CIE -->|ingest| SINK SINK --> C1 --> CH SINK --> C2 SINK --> LIVE -.->|if a viewer is watching| CHAN --> LR --> UI CH --> RS --> UI ``` ## What it does - Producers call `EventLogEmitterService.createContext().insert*()`, which builds a typed `WorkspaceEventEnvelope` and writes it through `WorkspaceEventSinkService` to the configured sinks (ClickHouse, Console) plus a presence-gated live fan-out. Record/CRUD events reach the same sink through the existing `entityEventsToDbQueue`. There is no dedicated queue; ClickHouse `async_insert` batches server-side. Writes are best-effort, as on main today. - `EVENT_LOG_TYPES[table]` is the per-type source of truth: the ClickHouse table, the required entitlement, the free-text filter column, and the row-to-GraphQL mapping. Read row shapes derive from the write rows. - Four modules along their dependency boundaries: `EventLogEmitterModule` (producer API), `EventLogIngestionModule` (sink layer), `EventLogLiveModule` (fan-out), and `EventLogsViewerModule` (the entitlement-gated GraphQL read, which is where billing/enterprise/permissions stay so producers stay light). - Logs viewer: per-table columns, filters (text, date, record), live mode, and an upgrade card that points to Billing on Cloud or the Admin Panel on self-hosted. Application logs are free on every plan; the other four require the `AUDIT_LOGS` entitlement (with a `NO_ENTITLEMENT` fallback to the upgrade card). - Renames `AuditService` to `EventLogEmitterService`, and the generic `Monitoring` event to a typed `Impersonation` event (`level` + `action`). - Removes `UsageEventWriterService`, the `application-logs` driver/module, and `AuditService`'s direct inserts. ## Durability Writes are best-effort, the same as main today (the old writers were fire-and-forget). A dedicated queue was tried mid-PR and removed: `async_insert` already batches server-side, so the queue only added durability, which isn't a requirement right now. The `EventSink` seam keeps a durable transport (e.g. a Redis-Streams buffer) easy to add later without touching producers. ## Out of scope S3 peer sink (seam only), Postgres or any second read path, `ReplicatedMergeTree`, ClickHouse table-schema changes, and the record-data `EVENT_STREAM_CHANNEL` (unchanged, separate concern). ## Testing Unit tests cover the registry definitions and row normalization, the entitlement gating, the envelope builders, and the producers. Integration tests cover the write paths (record create produces an `objectEvent`; the track mutation produces a `workspaceEvent`) and the read/query path across all five tables. Verified with typecheck, lint, a server boot, and GraphQL/SDK codegen.
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Why Twenty
Twenty gives technical teams the building blocks for a custom CRM that meets complex business needs and quickly adapts as the business evolves. Twenty is the CRM you build, ship, and version like the rest of your stack.
Learn more about why we built Twenty
Installation
Cloud
The fastest way to get started. Sign up at twenty.com and spin up a workspace in under a minute, with no infrastructure to manage and always up to date.
Build an app
Scaffold a new app with the Twenty CLI:
npx create-twenty-app my-app
Define objects, fields, and views as code:
import { defineObject, FieldType } from 'twenty-sdk/define';
export default defineObject({
nameSingular: 'deal',
namePlural: 'deals',
labelSingular: 'Deal',
labelPlural: 'Deals',
fields: [
{ name: 'name', label: 'Name', type: FieldType.TEXT },
{ name: 'amount', label: 'Amount', type: FieldType.CURRENCY },
{ name: 'closeDate', label: 'Close Date', type: FieldType.DATE_TIME },
],
});
Then ship it to your workspace:
npx twenty app:publish --private
See the app development guide for objects, views, agents, and logic functions.
Self-hosting
Run Twenty on your own infrastructure with Docker Compose, or contribute locally via the local setup guide.
Everything you need
Twenty gives you the building blocks of a modern CRM (objects, views, workflows, and agents) and lets you extend them as code. Here's a tour of what's in the box.
Want to go deeper? Read the User Guide for product walkthroughs, or the
Documentation for developer reference.
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Stack
TypeScript
Nx
NestJS, with BullMQ,
PostgreSQL,
Redis
React, with Jotai, Linaria and Lingui
Thanks
Thanks to these amazing services that we use and recommend for code review (Greptile), catching bugs (Sentry) and translating (Crowdin).
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