Causal GPT-RL — Unity ML-Agents environments
Copyright 2026 ccnets

This repository redistributes and modifies material from the Unity ML-Agents
Toolkit.

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Unity ML-Agents Toolkit
  Copyright (c) Unity Technologies.
  Licensed under the Apache License, Version 2.0.
  https://github.com/Unity-Technologies/ml-agents

Modifications by ccnets (stated per Apache-2.0 section 4b):
  - The Unity builds under `Crawler/`, `3DBallHard/`, `PushBlock/`, `Pyramids/`,
    `Worm/`, `Walker/`, `DungeonEscape/`, and `SoccerTwos/` were produced from
    customized ML-Agents projects derived from `ml-agents-release_23`.
  - Each build's baked-in policy was removed so the build accepts actions from
    an externally supplied policy at run time.
  - `SoccerTwos.onnx` derives from the release-23 SoccerTwos stock policy. Its
    dangling output declarations, which referenced no graph values, were removed
    for compatibility with current ONNX Runtime. The computation graph and
    learned parameters were not changed.
  - The `tier_policies/` files derive from the release-23 stock policies of the
    same name, re-exported to additionally expose their pre-softmax `logits`
    output (`norm_logits` as well for PushBlock and Pyramids). The learned
    parameters and the pre-existing outputs were not changed; the extra output
    lets a softmax temperature synthesize the calibrated `medium` / `simple`
    dataset tiers.
  - The `Crawler/`, `3DBallHard/`, and `PushBlock/` builds additionally carry
    Unity Barracuda assemblies (`Unity.Barracuda*.dll`) and
    `Unity.ML-Agents.Extensions*.dll` left over from an earlier generation of
    those projects. They are inert here:
    the shipped `Unity.ML-Agents.dll` references `Unity.InferenceEngine` only.
  - No changes to the ML-Agents Python source are distributed in this repository.

Stock policies from `ml-agents-release_23`, redistributed unchanged under
Apache-2.0 (byte-identical to the upstream files):
  - `Crawler.onnx`        — `Crawler/TFModels/Crawler.onnx`
  - `3DBallHard.onnx`     — `3DBall/TFModels/3DBallHard.onnx`
  - `PushBlock.onnx`      — `PushBlock/TFModels/PushBlock.onnx`
  - `Pyramids.onnx`       — `Pyramids/TFModels/Pyramids.onnx`
  - `Worm.onnx`           — `Worm/TFModels/Worm.onnx`
  - `Walker.onnx`         — `Walker/TFModels/Walker.onnx`
  - `DungeonEscape.onnx`  — `DungeonEscape/TFModels/DungeonEscape.onnx`

Modified stock policies from `ml-agents-release_23`, redistributed under
Apache-2.0:
  - `SoccerTwos.onnx`                   — `Soccer/TFModels/SoccerTwos.onnx`
  - `tier_policies/PushBlock.onnx`      — `PushBlock/TFModels/PushBlock.onnx`
  - `tier_policies/Pyramids.onnx`       — `Pyramids/TFModels/Pyramids.onnx`
  - `tier_policies/DungeonEscape.onnx`  — `DungeonEscape/TFModels/DungeonEscape.onnx`
  - `tier_policies/SoccerTwos.onnx`     — `Soccer/TFModels/SoccerTwos.onnx`

All upstream paths above are relative to
`Project/Assets/ML-Agents/Examples/` in the `ml-agents` repository.

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Unity runtime components
  `UnityPlayer.dll`, `UnityCrashHandler64.exe`, and the `MonoBleedingEdge/`
  runtime are Unity Technologies components, redistributed here only as part of a
  built player and subject to Unity Technologies' software terms, not the
  Apache-2.0 license above.