docs/vector-extras.md

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:

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",
)

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:

-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.