ci: add Gym GPU test workflow

.github/actions/classify-changes/action.yml

@@ -0,0 +1,100 @@
+# SPDX-FileCopyrightText: Copyright (c) 2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+name: Classify Changes
+description: Classify Gym changes as full, server-only, or docs-only
+
+inputs:
+  base-ref:
+    description: Base commit or ref used to determine changed files
+    required: false
+    default: ""
+  force-run-all:
+    description: Run the full suite without inspecting changed files
+    required: false
+    default: "false"
+
+outputs:
+  run_full:
+    description: Whether to run the full test suite
+    value: ${{ steps.classify.outputs.run_full }}
+  run_servers:
+    description: Whether to run only changed server tests
+    value: ${{ steps.classify.outputs.run_servers }}
+  docs_only:
+    description: Whether all changed files are documentation-classified files
+    value: ${{ steps.classify.outputs.docs_only }}
+  server_all_changed_files:
+    description: Changed files belonging to server paths
+    value: ${{ steps.changed-files.outputs.server_all_changed_files }}
+
+runs:
+  using: composite
+  steps:
+    - name: Detect changed files
+      id: changed-files
+      if: inputs.force-run-all != 'true'
+      uses: step-security/changed-files@3dbe17c78367e7d60f00d78ae6781a35be47b4a1 # v45.0.1
+      with:
+        base_sha: ${{ inputs.base-ref }}
+        # 'files' input enables global other_changed_files_count for uncategorized files.
+        files: |
+          **.md
+          fern/**
+          LICENSE
+          resources_servers/**
+          responses_api_agents/**
+          responses_api_models/**
+          benchmarks/**
+        files_yaml: |
+          doc:
+            - '**.md'
+            - fern/**
+            - LICENSE
+            - benchmarks/**
+          server:
+            - resources_servers/**
+            - responses_api_agents/**
+            - responses_api_models/**
+
+    - name: Classify changes
+      id: classify
+      shell: bash -e -u -o pipefail {0}
+      env:
+        DOC_CHANGED: ${{ steps.changed-files.outputs.doc_any_changed }}
+        FORCE_RUN_ALL: ${{ inputs.force-run-all }}
+        OTHER_COUNT: ${{ steps.changed-files.outputs.other_changed_files_count }}
+        SERVER_CHANGED: ${{ steps.changed-files.outputs.server_any_changed }}
+      run: |
+        if [[ "$FORCE_RUN_ALL" == "true" || "${OTHER_COUNT:-0}" -gt 0 ]]; then
+          run_full=true
+          run_servers=false
+          docs_only=false
+        elif [[ "$SERVER_CHANGED" == "true" ]]; then
+          run_full=false
+          run_servers=true
+          docs_only=false
+        else
+          run_full=false
+          run_servers=false
+          docs_only=true
+        fi
+
+        echo "run_full=$run_full" >> "$GITHUB_OUTPUT"
+        echo "run_servers=$run_servers" >> "$GITHUB_OUTPUT"
+        echo "docs_only=$docs_only" >> "$GITHUB_OUTPUT"
+
+        echo "Changed files: docs=${DOC_CHANGED:-false}, servers=${SERVER_CHANGED:-false}, other=${OTHER_COUNT:-0}"
+        echo "Classification: run_full=$run_full, run_servers=$run_servers, docs_only=$docs_only"

.github/actions/test-template/action.yml

@@ -0,0 +1,119 @@
+# SPDX-FileCopyrightText: Copyright (c) 2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+name: Test Template
+description: Run a Gym CPU or GPU test script in the CI container
+
+inputs:
+  script:
+    description: Path to the test script inside the Gym repository
+    required: true
+  test-type:
+    description: Test hardware type (cpu or gpu)
+    required: true
+  container-image:
+    description: Gym container image to use for the test
+    required: true
+  test-data-path:
+    description: Test data path selected by CI pre-flight
+    required: true
+
+runs:
+  using: composite
+  steps:
+    - name: Run test
+      id: test
+      continue-on-error: true
+      shell: bash -e -u -o pipefail {0}
+      env:
+        CONTAINER_IMAGE: ${{ inputs.container-image }}
+        TEST_DATA_PATH: ${{ inputs.test-data-path }}
+        TEST_SCRIPT: ${{ inputs.script }}
+        TEST_TYPE: ${{ inputs.test-type }}
+      run: |
+        case "$TEST_TYPE" in
+          cpu)
+            gpu_args=()
+            ;;
+          gpu)
+            gpu_args=(--runtime=nvidia --gpus all)
+            ;;
+          *)
+            echo "Unsupported test type: $TEST_TYPE (expected cpu or gpu)"
+            exit 1
+            ;;
+        esac
+
+        echo -e "\033[1;34m┌─ launching test ─────────────────────────────────────────────────────────┐\033[0m"
+        echo -e "\033[1;34m│  script    : $TEST_SCRIPT\033[0m"
+        echo -e "\033[1;34m│  type      : $TEST_TYPE\033[0m"
+        echo -e "\033[1;34m│  container : $CONTAINER_IMAGE\033[0m"
+        echo -e "\033[1;34m└──────────────────────────────────────────────────────────────────────────┘\033[0m"
+
+        docker pull "$CONTAINER_IMAGE"
+        docker run --rm \
+          "${gpu_args[@]}" \
+          --shm-size=64g \
+          --env TEST_DATA_PATH="$TEST_DATA_PATH" \
+          --volume "$TEST_DATA_PATH:$TEST_DATA_PATH" \
+          --entrypoint bash \
+          "$CONTAINER_IMAGE" \
+          -e -u -o pipefail "$TEST_SCRIPT"
+
+    - name: Report result
+      if: always()
+      shell: bash -e -u -o pipefail {0}
+      env:
+        CONTAINER_IMAGE: ${{ inputs.container-image }}
+        TEST_OUTCOME: ${{ steps.test.outcome }}
+        TEST_SCRIPT: ${{ inputs.script }}
+        TEST_TYPE: ${{ inputs.test-type }}
+      run: |
+        if [[ "$TEST_OUTCOME" == "success" ]]; then
+          status="PASSED"
+          symbol="✅"
+          echo -e "\033[1;32m╔══════════════════════════════════════════════════════════════════════════╗\033[0m"
+          echo -e "\033[1;32m║                                                                          ║\033[0m"
+          echo -e "\033[1;32m║   ✅  PASSED                                                             ║\033[0m"
+          echo -e "\033[1;32m║   $TEST_SCRIPT\033[0m"
+          echo -e "\033[1;32m║                                                                          ║\033[0m"
+          echo -e "\033[1;32m╚══════════════════════════════════════════════════════════════════════════╝\033[0m"
+        else
+          status="FAILED"
+          symbol="❌"
+          echo -e "\033[1;31m╔══════════════════════════════════════════════════════════════════════════╗\033[0m"
+          echo -e "\033[1;31m║                                                                          ║\033[0m"
+          echo -e "\033[1;31m║   ❌  FAILED                                                             ║\033[0m"
+          echo -e "\033[1;31m║   $TEST_SCRIPT\033[0m"
+          echo -e "\033[1;31m║                                                                          ║\033[0m"
+          echo -e "\033[1;31m╚══════════════════════════════════════════════════════════════════════════╝\033[0m"
+        fi
+
+        {
+          echo "### $symbol $TEST_SCRIPT — $status"
+          echo ""
+          echo "| Field | Value |"
+          echo "|---|---|"
+          echo "| Type | \`$TEST_TYPE\` |"
+          echo "| Image | \`$CONTAINER_IMAGE\` |"
+        } >> "$GITHUB_STEP_SUMMARY"
+
+        if [[ "$TEST_OUTCOME" == "success" ]]; then
+          echo "::notice title=Test result::$TEST_SCRIPT — PASSED"
+          exit 0
+        fi
+
+        echo "::error title=Test result::$TEST_SCRIPT — FAILED"
+        exit 1