Changelog¶

All notable changes to EventSourcingDB will be documented in this file.

The format is based on Keep a Changelog, and EventSourcingDB adheres to Semantic Versioning.

1.2.0 (November 3rd, 2025)¶

Added the isSubjectPopulated precondition, which only allows writes if the given subject has at least one event
Added a link to the documentation in the management UI
Added a blog to the documentation
Added an External Resources page to the documentation
Added a warning when starting the server if the management UI is enabled on a browser-blocked port
Added support for the signature and hash fields in EventQL, including auto-completion, syntax highlighting, and query execution
Added a warning when starting the server with an evaluation license, informing about the limited event capacity and where to get support and unlimited events
Added German language support to the management UI with language switching
Added comprehensive documentation on Configuring EventAI, including setup instructions, security considerations, privacy implications, example prompts, and troubleshooting

Updated the CLI Overview documentation to include the --signing-key-file flag

Fixed a bug where observing events with fromLatestEvent and ifEventIsMissing: "wait-for-event" would only return events of the same type after the first matching event, instead of returning all subsequent events for the subject
Fixed a bug where some numbers were shown malformed in the management UI
Fixed a bug where long values in the EventQL tree graph would overflow their containers instead of being truncated with ellipsis
Fixed a bug where alerts in the management UI could be hidden behind other UI elements
Fixed a bug where pressing Enter in the login form would not submit the credentials

Added documentation on the Rust client SDK
Added the isEventQlQueryTrue precondition, which only allows writes if the given EventQL query evaluates to true
Added documentation on Dynamic Consistency Boundaries
Added suggestions for available event types when comparing against the type field in the EventQL editor
Added the /read-event-type endpoint to read a specific event type from the database
Added a Server header to every HTTP response containing EventSourcingDB/<version>
Added support for event signatures using Ed25519 and PKCS#8 PEM private keys via the new CLI flag --signing-key-file

Fixed a bug where queries inserted from the EventAI panel were not formatted automatically
Fixed a bug where formatting an EventQL query with DISTINCT in the PROJECT INTO clause would remove the DISTINCT keyword
Fixed a bug where an EventQL projection with COUNT or SUM would not return any result if the query processed zero events
Fixed a bug where an EventQL query would fail silently if it didn't return a row within 5 seconds
Fixed a bug that prohibited aggregation functions in EventQL subqueries
Fixed a bug in the EventQL editor that resulted in a broken light theme when using light mode in the management UI
Fixed the EventQL formatter to include manually placed parentheses in the formatted query
Fixed a bug in the documentation where the EventQL function SUBSTRING was incorrectly referred to as SUBSTR

Added missing fields to the EventQL event representation for parity with the /read-events endpoint

Changed the link to the NDJSON website in the documentation to point to the GitHub repository instead

Fixed running an EventQL query with aggregate functions crashing an empty database
Fixed management UI not working when using HTTP on a remote server
Fixed management UI not showing the correct number of events after restarting the server with a persistent directory
Fixed EventAI panel remaining visible in the UI after disabling it and restarting the server
Fixed a typo in the documentation on running EventSourcingDB with Kubernetes

Fixed another issue where running an EventQL query blocked writing new events