## Summary - Add `WORKSPACE_SCHEMA_DDL_LOCKED` env-only boolean config variable that blocks all workspace schema DDL changes when set to `true`. This is intended for hot upgrades where logical replication cannot handle DDL changes. Enforced at two chokepoints: - `WorkspaceMigrationRunnerService.run` — blocks all metadata-driven DDL (object/field/index CRUD, app sync/uninstall, standard app sync, upgrade commands) - `WorkspaceDataSourceService.createWorkspaceDBSchema` / `deleteWorkspaceDBSchema` — blocks workspace creation (sign-up) and hard deletion. Uses a dedicated `WorkspaceDataSourceException` (not ForbiddenException) - Add maintenance mode feature with Admin Panel UI and user-facing banner: - **Backend**: `MaintenanceModeService` stores maintenance window (startAt, endAt, optional link) in `core.keyValuePair` as `CONFIG_VARIABLE`. Validates endAt > startAt. Uses `GraphQLISODateTime` scalar for date fields. Exposed via `clientConfig` REST endpoint and admin GraphQL mutations (`setMaintenanceMode`, `clearMaintenanceMode`) - **Admin Panel**: New "Maintenance Mode" section in Health tab with UTC datetime pickers and activate/deactivate controls - **Banner**: `InformationBannerMaintenance` displayed at the top of `DefaultLayout` for all users, using Temporal API for timezone-aware formatting with an optional "Learn more" link These two features are **independent** — the DDL lock is controlled via env var for operational use, while maintenance mode is a UI notification mechanism controlled from the admin panel.
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Why Twenty
We built Twenty for three reasons:
CRMs are too expensive, and users are trapped. Companies use locked-in customer data to hike prices. It shouldn't be that way.
A fresh start is required to build a better experience. We can learn from past mistakes and craft a cohesive experience inspired by new UX patterns from tools like Notion, Airtable or Linear.
We believe in open-source and community. Hundreds of developers are already building Twenty together. Once we have plugin capabilities, a whole ecosystem will grow around it.
What You Can Do With Twenty
Please feel free to flag any specific needs you have by creating an issue.
Below are a few features we have implemented to date:
- Personalize layouts with filters, sort, group by, kanban and table views
- Customize your objects and fields
- Create and manage permissions with custom roles
- Automate workflow with triggers and actions
- Emails, calendar events, files, and more
Personalize layouts with filters, sort, group by, kanban and table views
Customize your objects and fields
Create and manage permissions with custom roles
Automate workflow with triggers and actions
Emails, calendar events, files, and more
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 UI testing (Chromatic), code review (Greptile), catching bugs (Sentry) and translating (Crowdin).
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