Release 2026.05.0

• New SQLite database (kosync.db)
• New Environment configuration mechanism (kosync.env)
• Automatic database.json to kosync.db migration
• Automatic database.json to kosync.env migration
• Removal of backup and restore mechanism (stop KOsync and copy/replace the kosync.db)

Docker Image
docker.obth.eu/atjontv/kosync:2026.05.0

Release 2026.04.1

• Fix Pretty Name getting lost on progress push

Docker Image
docker.obth.eu/atjontv/kosync:2026.04.1

Release 2026.04.0

• Simple WebUI for viewing read progress
• Via the WebUI a Pretty Name can be set for Documents
• Fixes a bug that database migrations would not be persisted if no sync push happened before restart, causing endless backups
• New CI validation staticcheck
• Documentation improvements

Docker Image
docker.obth.eu/atjontv/kosync:2026.04.0

Release 2026.03.1

• Fix progress push being broken
• Fix wrong backup file name
• Return the same HTTP Status Code as KORSS for registration-disabled response
• Add backup_on_startup feature as alternative to always starting KOsync with --backup

Docker Image
docker.obth.eu/atjontv/kosync:2026.03.1

Release 2026.03.0

• Rewrote the HTTP Handler parts for fiber
• Refactored code to make use of fiber features
• Improved documentation
• Database Restore and manual Backup feature
• Alternative Database Backup encoding with msgpack (default)
• Docker compose.yml and Caddy Caddyfile for deployment
• Add GitLab CI integration
• Introduce SAST (Static Application Security Testing) powered by Bearer
• Introduce License validation powered by WWHRD
• Fixed issues found by SAST

Docker Image
docker.obth.eu/atjontv/kosync:2026.03.0

Release 2026.02.0

• Config store_history to create a document progress history
• Database schema for database schema migrations

The progress history is currently unused, but I have plans to use them for reading analytics at a later date.

Docker Image
docker.obth.eu/atjontv/kosync:2026.02.0

Release 2026.01.1

• Refactored the server for readability with documentation comments
• Changed database.json to have all config entries in a config object
• New config -> enable_debug_log configuration to enable/disable the debug logs

Docker Image
docker.obth.eu/atjontv/kosync:2026.01.1

Release 2026.01.0

Initial Release

This is the first release of KOsync, a KOReader compatible Progress Sync Server written in pure Go without any dependencies other than the Go standard library.

Docker Image
docker.obth.eu/atjontv/kosync:2026.01.0