Add RL smoke tests to Tunix TPU CI pipeline

PiperOrigin-RevId: 915142830

Author: sizhit2

.github/workflows/tpu-tests.yml

@@ -231,6 +231,12 @@ jobs:
 
           export JAX_PLATFORMS=tpu,cpu
           ./tests/sft/sft_tpu_smoke_test.sh
+      - name: Run tunix RL smoke tests
+        env:
+          HF_TOKEN: ${{ secrets.HF_TOKEN }}
+        run: |
+          export JAX_PLATFORMS=tpu,cpu
+          ./tests/rl/rl_tpu_smoke_test.sh
       - name: Run Smoke tests
         env:
           HF_TOKEN: ${{ secrets.HF_TOKEN }}

examples/rl/grpo/gsm8k/run_qwen3_simplereward.sh

@@ -97,4 +97,5 @@ python3 -m tunix.cli.grpo_main \
   grpo_config.num_iterations=1 \
   grpo_config.beta=0.08 \
   grpo_config.epsilon=0.2 \
-  reward_functions="['tunix/cli/reward_fn/simple_math.py']"
+  reward_functions="['tunix/cli/reward_fn/simple_math.py']" \
+  "$@"

tests/rl/rl_tpu_smoke_test.sh

@@ -0,0 +1,33 @@
+#!/bin/bash
+# Copyright 2026 Google LLC
+#
+# 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
+#
+#     https://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.
+
+set -ex
+
+echo "=== Running Non-Agentic RL Smoke Test (Vanilla Rollout) ==="
+model_name="Qwen2.5-0.5B" \
+num_batches=1 \
+bash examples/rl/grpo/gsm8k/run_qwen3_simplereward.sh \
+  rollout_config.total_generation_steps=64
+
+echo "=== Running Agentic RL Smoke Test (vLLM Rollout) ==="
+model_name="Qwen2.5-0.5B" \
+model_id="Qwen/Qwen2.5-0.5B" \
+num_batches=1 \
+total_tpus=8 \
+train_mesh="(4,1)" \
+rollout_mesh="(1,4)" \
+checkpoint_dir="/tmp/rl_smoke_agentic_ckpts" \
+bash examples/rl/grpo/gsm8k/run_qwen3_8b_disagg.sh \
+  rollout_config.total_generation_steps=64