feat(qwen3.5-122b): replace mistral-small-4 as gen (abliterated NVFP4, text-only)

bjk110/Qwen3.5-122B-A10B-abliterated-NVFP4 on ana-ml2 GPU 0 (heretic downed):
- stacks/qwen3.5-122b/ — vLLM serve via the repo's text-only patch (Qwen3.5 MoE is a
  multimodal arch but this checkpoint is text-only weights), --reasoning-parser qwen3,
  GPU 0 pin, :8013; entrypoint+patch mounted from the model dir.
- serve-qwen3.5-122b.yaml — displace heretic + serve + verify.
- litellm: REMOVED dead mistral-small-4 / -reasoning; added qwen3.5-122-a10b[-reasoning]
  + aliases qwen-large[-reasoning] + repointed gen[-reasoning] -> qwen (thinking split via
  chat_template_kwargs.enable_thinking + --reasoning-parser qwen3).

Verified live: qwen healthy on :8013; gen / qwen-large / qwen3.5-122-a10b route, and
gen-reasoning returns reasoning_content; mistral-small-4 removed.
NOTE: Worldtree character backend (was bound to mistral-small-4) is dark until repointed
(operator-acknowledged).

playbooks/serve-qwen3.5-122b.yaml

@@ -0,0 +1,72 @@
+# Displace mistral-small-4 (heretic) on ana-ml2 GPU 0 and serve
+# bjk110/Qwen3.5-122B-A10B-abliterated-NVFP4 (text-only) as the new `gen` model
+# (operator 2026-06-19). Weights pre-staged at /tank/aimodels/qwen3.5-122b-a10b-nvfp4
+# (incl. the repo's serving/entrypoint.sh + vllm_patches/ that the compose mounts).
+#
+# ⚠️ Downing mistral-small-4 takes down the Worldtree CHARACTER backend (vision-intact)
+# until it's repointed — operator-acknowledged. REVERT = down qwen, up -d the heretic.
+#
+#   scripts/elway ana-ml2 --playbook playbooks/serve-qwen3.5-122b.yaml
+
+vars:
+  compose_dir: /opt/docker/compose/qwen3.5-122b
+  heretic_dir: /opt/docker/compose/mistral-small-4-heretic
+  model_dir: /tank/aimodels/qwen3.5-122b-a10b-nvfp4
+  host_port: "8013"
+
+steps:
+  - name: Verify NVFP4 weights + the repo's patch/entrypoint are staged
+    shell: |
+      test -f {{ model_dir }}/model.safetensors.index.json \
+        && test -f {{ model_dir }}/serving/entrypoint.sh \
+        && test -f {{ model_dir }}/vllm_patches/patch_qwen35_moe_text.py
+    changed_when: "false"
+
+  - name: Ensure vLLM compile-cache dir exists (writable)
+    shell: mkdir -p {{ model_dir }}/.cache/vllm
+    creates: "{{ model_dir }}/.cache/vllm"
+
+  - name: Ensure compose dir exists
+    shell: mkdir -p {{ compose_dir }}
+    creates: "{{ compose_dir }}"
+
+  - name: Upload compose.yaml
+    upload:
+      src: stacks/qwen3.5-122b/compose.yaml
+      dest: "{{ compose_dir }}/compose.yaml"
+      mode: "0644"
+
+  - name: Seed .env from template (only if absent)
+    upload:
+      src: stacks/qwen3.5-122b/.env.example
+      dest: "{{ compose_dir }}/.env"
+      mode: "0644"
+    when: "[ ! -f {{ compose_dir }}/.env ]"
+
+  - name: Displace — down mistral-small-4-heretic (frees GPU 0; no-op if down)
+    shell: cd {{ heretic_dir }} && docker compose down
+
+  - name: Bring up qwen3.5-122b
+    shell: cd {{ compose_dir }} && docker compose up -d
+
+  - name: Wait for vLLM /health (allow ~15 min for patch + NVFP4 MoE load + warmup)
+    shell: |
+      for i in $(seq 1 180); do
+        curl -sf -o /dev/null --max-time 3 http://localhost:{{ host_port }}/health && exit 0
+        sleep 5
+      done
+      exit 1
+    changed_when: "false"
+
+verify:
+  - name: /health returns 200
+    shell: curl -sf -o /dev/null http://localhost:{{ host_port }}/health
+    changed_when: "false"
+
+  - name: served model id is qwen3.5-122-a10b
+    shell: curl -sf http://localhost:{{ host_port }}/v1/models | grep -q qwen3.5-122-a10b
+    changed_when: "false"
+
+  - name: container running
+    shell: docker inspect vllm-qwen35-122b --format '{{.State.Status}}' | grep -q running
+    changed_when: "false"