There are 5 unique codex entries in the Lore section on Ziost. They are accessible to all players regardless of class or faction.
Death of a World is obtained from interacting with the Planetary Status Monitor during "The End of it All" mission.
Codex type: Lore | Faction: Both | Class: All
Associated Achievement: None
Galactic History 94: The Sacking of Coruscant is obtained from interacting with the Ziost Archive Holocron. You can access the Ziost Archive Holocron by interacting with the Exposed Walker Wiring.
Codex type: Lore | Faction: Both | Class: All
Associated Achievement: None
Galactic History 95: A Cold War Begins is obtained from interacting with the Ziost Archive Maintenance Droid. You can access the Ziost Archive Maintenance Droid by collecting the Ziost Archive Data Cartridge and Ziost Archivist's Datapad.
Codex type: Lore | Faction: Both | Class: All
Associated Achievement: None
Revolt on Ziost is obtained from interacting with the Security Console during "Dead Center" mission.
Codex type: Lore | Faction: Both | Class: All
Associated Achievement: None
The Emperor's Eye is obtained from interacting with the Clickable Console during "Eyes in the Past" mission.
Codex type: Lore | Faction: Both | Class: All
Associated Achievement: None
The Invasion of Ziost is obtained from interacting with the Automated Defense Console during "Powerless" mission.
Codex type: Lore | Faction: Both | Class: All
Associated Achievement: None