# Four vector-only simulation additions

Match3VectorObs, Basic, 3DBall, and PushBlockWithInput were added on 2026-10-22.
Windows and Linux x86-64 players were built with Unity 6000.0.40f1 from the local
ML-Agents release-23 project. Model references were removed from scene copies;
BuildReport.packedAssets contains no ONNX/NN policies. Every live observation
sensor was verified to be rank one with the Windows ML-Agents communicator.
The Match3 scene includes only the VectorObs agents; VisualObs and heuristic
boards were removed. No camera rendering is needed to control any of these four.

## Running

Use Python 3.10 and `tools/requirements-simulation.txt`. Download the desired
Windows folder (or `linux/<Name>/**`), the separate root `<Name>.onnx`, and
`tools/probe_vector_extras.py`:

```python
from huggingface_hub import snapshot_download
snapshot_download(
    repo_id="ccnets/causal-gpt-rl-unity-envs", repo_type="dataset",
    allow_patterns=["Match3VectorObs/**", "Match3VectorObs.onnx", "tools/**"],
    local_dir="unity-envs",
)
```

```bash
python unity-envs/tools/probe_vector_extras.py --build unity-envs/Match3VectorObs/Match3VectorObs.exe --policies unity-envs --report probe.json --ticks 1000
```

Use `--random` to drive without any policy, or `--graphics --time-scale 1` for a
visible window. Each concurrent player needs a distinct `--worker-id`. Linux
players require execute permission (`chmod +x`) and use the `.x86_64` executable.
These are simulations and validation tools; no trajectories or quality tiers
are generated here.

## Contracts and caveats

- Match3VectorObs represents ordinary and special tiles as separate flat vectors.
  Respect the dynamic action mask: each action selects an adjacent cell swap.
  Boards vary in size within the configured maxima. Episodes interrupt after
  500 moves; an interruption is a time limit, not task failure.
- Basic observes its current position as a one-hot vector of length 20. Its
  three actions move left, stay, or move right. The small goal rewards +0.1,
  the larger goal +1, and each step costs 0.01. Episode reset reloads its scene.
- 3DBall observes platform rotation, relative ball position, and ball velocity.
  Two continuous actions tilt the platform. This differs from 3DBallHard,
  which hides velocity and uses stacked observations.
- PushBlockWithInput uses Unity Input System actuators: continuous movement
  and rotation plus a binary jump action. Its behavior is still named
  `PushBlock?team=0`. Do not reuse the older discrete `PushBlock.onnx`: the
  separate hybrid policy is published as `PushBlockWithInput.onnx`. This is a
  filename-only rename of `PushBlockWithInput/TFModels/PushBlock.onnx`.
  Its legacy ONNX takes a concatenated vector; the included runner joins the
  live ray sensors in their ML-Agents order and samples masked discrete logits.

## Validation and reproduction

Each Windows player completed 1,000 external-stock-policy ML-Agents steps,
with finite observations/actions/rewards, accepted decisions, and episode
boundaries. Each Linux player passed a native Ubuntu/WSL engine startup check;
Linux policy rollouts were not tested. Reports are under
`validation/vector-extras/`. Reward sums are raw smoke-test results, not tier
calibration or comparable task scores.

`tools/VectorExtrasBuild.cs` stages scene copies, clears serialized model
references, sets BehaviorType.Default, and rejects packed ONNX/NN assets.
Install it in `Assets/Editor/` in a separate release-23 project. Invoke Unity:

```text
-batchmode -force-d3d11 -projectPath <project> -buildTarget Win64 -executeMethod VectorExtrasBuild.Build -simulationOutput <output>
```

For Linux replace `-buildTarget Win64` with `-buildTarget Linux64` and add
`-simulationTarget StandaloneLinux64`.
The source project and its packages must be present locally; this helper is
not a complete source archive. Published manifest action specs include native
ActuatorComponent contributions and are cross-checked against live probes.

## Verified policy provenance

All four ONNX files are byte-identical to their release-23 source files:

- `Match3VectorObs.onnx`: SHA-256 `876995464fa883b992b493f8daa7a73179d04e5097b8d26468ff688a31356bf9`.
- `Basic.onnx`: SHA-256 `76685fb46f3618dcdc1aa870d36a541f6550cdb2ce639232547d195aa6f01a2f`.
- `3DBall.onnx`: SHA-256 `496dc01d14506b635268fc62ff0d58a16be71fe3a83e47c1ac72984ce69a1864`.
- `PushBlockWithInput.onnx`: SHA-256 `270d26f24ab34fa3238d7503b89b08b605062649b12fdd63d22f0556d32be5a3`.