google-deepmind/concordia v2.3.0

v2.3.0

Repository: google-deepmind/concordia

Tag: v2.3.0

Published: 2026-02-04T18:58:51Z

Prerelease: no

Release notes:

[2.3.0] - 2026-02-04

Changed

• Deleted all deprecated files.
• Support overriding the default language model either for agents or game masters in the generic simulation prefab.
• tests for event resolution filtering
• Replace print() statements with absl.logging
• Add analyze-logs skill
• Add option on generic simulation.play to produce new style structured logs. No

change to default behavior. New log style is off by default (for now).

• Improve the new structured logging library and remove functions used only for comparison to the old format.
• Update default constants suggesting action spec formats to suggest the json approach
• Improve observation queue handling and add scene-aware event delivery.
• Add allow_duplicates option to AssociativeMemoryBank Fixes a bug where

identical actions across rounds were incorrectly deduplicated, causing EventResolution to pick up stale data. - Add allow_duplicates constructor parameter to AssociativeMemoryBank - Enable allow_duplicates for game_master memory_bank in generic.py

• Copybara import of the project:
• Fixing the search for the last event generated by the player
• Remove the concordia/prefabs/configurator directory.
• Correct several lingering references to deprecated types.
• Add physically situated and dramaturgic game master prefab. This prefab is similar to the situated_in_time_and_place prefab, but with scenes added in.
• add support for extra_components in dialogic_and_dramaturgic game master.
• Changed action spec parsing to json for more robustness than string matching

Added

• Add support for deepseek in the together_ai llm wrapper and fix its gemma support.
• README.md for thought_chains
• README.md for the environment
• typing README
• adding a README.md to the components folder, which documents the use of components
• documentation for the interactive_document
• Add PuppetActComponent and Puppet entity prefab.
• Add a rational actor entity
• Create SceneBasedTerminator and update GameMaster prefabs.
• README for language_model
• README for prefabs
• add structured logging

Fixed

• Add dramaturgic formative memories initializer to prevent bug in which the premise of the first scene was not delivered.
• Fix event resolution to correctly filter putative events by active player and add test for puppet_act
• fixing scene based termination