Merge branch 'main' into ksivaman/dsv3_4gpu_proxy

Resolve conflicts with the vr200 -> vrnvl72 rename (#6419): rename the
4-GPU DeepSeek V3 proxies to deepseek_v3_pretrain_4gpu_vrnvl72_{fp8mx,nvfp4}_proxy_config
and update their tests and recipe lists.

Follow #6282 and set NVTE_ALLOW_NONDETERMINISTIC_ALGO=0 in both 4-GPU
proxies to match their 256-GPU VRNVL72 parents and the environment invariant test.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Kirthi Shankar Sivamani <ksivamani@nvidia.com>

Author: ksivaman

.github/ISSUE_TEMPLATE/model_support_request.yml

@@ -27,9 +27,9 @@ body:
       description: Pick the closest fit for the requested model.
       options:
         - Dense decoder-only (e.g. Llama, Qwen, Gemma, Mistral, Nemotron)
-        - MoE decoder-only (e.g. DeepSeek V2/V3, OLMoE, Qwen3-MoE, MiniMax-M2)
+        - MoE decoder-only (e.g. DeepSeek V3, OLMoE, Qwen3-MoE, MiniMax-M2)
         - VLM / multimodal (e.g. Qwen-VL, Gemma-VL, Nemotron-VL)
-        - SSM / hybrid (e.g. Mamba, Nemotron-H)
+        - SSM / hybrid (e.g. Mamba, Nemotron 3)
         - Encoder-decoder (e.g. T5)
         - Other / unsure
     validations:

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

@@ -122,6 +122,9 @@ runs:
         echo "::group::Start test container"
         if [[ "$MOUNT_FS" == "true" ]]; then
           VOLUME_ARGS="--volume ${{ inputs.test-data-path }}:/home/TestData --env HF_HUB_OFFLINE=1"
+          # The shared offline cache may be read-only to the container user.
+          # All ranks in these single-container jobs share this writable lock directory.
+          VOLUME_ARGS+=" --env MEGATRON_CONFIG_LOCK_DIR=/home/ubuntu/.cache/huggingface"
           HF_HOME=/home/TestData/HF_HOME
           NEMO_HOME=/home/TestData/nemo_home
         else
@@ -177,6 +180,9 @@ runs:
           set -e
           export GH_TOKEN=${{ inputs.github-token }}
 
+          # Keep the FlashAttention generation policy scoped to CI tests.
+          export NVTE_FLASH_ATTN_V2=1 NVTE_FLASH_ATTN_V3=0 NVTE_FLASH_ATTN_V4=0
+
           if [[ "${{ contains(inputs.runner, 'gcp') }}" == "true" ]]; then
             export NCCL_ENV_PLUGIN=none
             export NCCL_NET_PLUGIN=none

.github/workflows/fern-docs-ci.yml

@@ -27,6 +27,9 @@ on:
 permissions:
   contents: read
 
+env:
+  FERN_NO_VERSION_REDIRECTION: "true"
+
 jobs:
   check:
     runs-on: ubuntu-latest