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Changelog

Jan 26, 2026

CogsGuard is the New Default Game

  • cogames missions now shows CogsGuard (cogsguard_arena) as the default and only visible game
  • Legacy missions (training_facility, hello_world, machina_1) are hidden from the CLI but still accessible by name
  • Default season changed to beta-cogsguard

Season-Aware Policy Validation

  • cogames upload and cogames validate-policy now accept --season to validate against the correct game for that season
  • Validation uses the game appropriate for the target season (e.g., beta season validates against training_facility.harvest, beta-cogsguard validates against cogsguard_machina_1.basic using the Machina1 map)
  • This ensures policies are validated against the same game they'll compete in

Jan 23, 2026

CLI Flag Updates

Breaking changes to command-line arguments for improved consistency:

  • cogames submissions - replaced policy_name with an optional --policy/-p flag instead of a positional argument
  • cogames diagnose - removed -m short form for --experiments
  • cogames diagnose - replaced --repeats with --episodes/-e
  • cogames make-mission - removed -h and -w short form for --height and --width
  • cogames login - replaced --server/-s with --login-server
  • cogames pickup - added --mission/-m and --variant/-v flags (previously hardcoded to machina_1.open_world)
  • cogames validate-policy - replaced policy positional argument with --policy/-p flag

Jan 7, 2026

Tournament CLI Updates

  • cogames upload - Upload a policy without submitting to a tournament
  • cogames submit - Submit an uploaded policy to a tournament season
  • cogames submissions - View your uploaded policies and tournament submissions
  • cogames leaderboard --season <name> - View the leaderboard for a season
  • cogames seasons - List available tournament seasons
  • cogames pickup - Evaluate a candidate policy against a fixed pool and compute VOR

Dec 16, 2025

CLI Command Restructuring

  • cogames eval has been renamed to cogames run

  • Commands intended for demonstration purposes to get you up and running are housed under cogames tutorial:

    • cogames train -> cogames tutorial train. This command offers a thin wrapper around pufferlib train
    • cogames make-policy -> cogames tutorial make-policy. This command creates an example python implementation of a scripted policy for you to modify
    • Introduced --scripted and --trainable modes for cogames tutorial make-policy. Each creates an example policy implementation from a template in different style: scripted or neural-net based.
    • cogames tutorial -> cogames tutorial play. This is an interactive tutorial that walks you through the basic mechanics of the game.

Dec 3, 2025

What's new

Breaking change: The format for specifying a policy in cogames command is now updated to support passing keyword arguments.

  • cogames -p or --policy arguments should now take the form class=...[,data=...][,proportion=...] [,kw.name=val]

  • Example: uv run cogames play -m hello_world -p class=path.to.MyPolicyClass,data=my_data/policy.pt,kw.policy_mode=fast

Update: cogames submit now accepts much larger checkpoint files. It makes use of presigned s3 URLs for uploading your checkpoint data instead of going through web servers that enforced lower file size caps.

Update: cogames submit does a light round of validation on your proposed submission before uploading it. It ensures that your policy is loadable (using the latest copy of cogames in pypi, not necessarily the one you have installed), and can perform a step on a simple environment.