Merge origin/main — integrate monitoring/Phase3 updates with Qwen3-8B no-think deployment

Resolved add/add conflicts in:
  - defaults/main.yml: kept our version (5 original models + Qwen3-8B x2 + rows 5-6)
  - tasks/swapmode.yml: kept our version (7-model GATE 2 assert)
  - templates/llama-server-router-preset.ini.j2: kept our version (+Qwen3-8B sections)
  - templates/llama-swap-config.yaml.j2: kept our version (+chat_template_file support)

Remote changes incorporated from origin/main (14 commits):
  - Ansible Phase 3 integration (llama-swap.service.j2, tasks/monitoring.yml)
  - Prometheus monitoring: PrometheusRule, Grafana dashboard, scrape config
  - VRAM exporter script, llama-swap-phase3 cutover results
  - Day2 playbooks: nomic_embed, cpu_offload_aux, per_model_ctx, qwen38_ctx128k
  - Router: CPU-offload Coder-14B + Llama-3.1-8B
  - host_vars/astro-orbiter/vars.yml updates

ansible/roles/llm-inference-multimodel/defaults/main.yml

@@ -190,38 +190,6 @@ llm_router_nomic_ctx_size: 8192
 llm_router_nomic_batch_size: 4096
 llm_router_nomic_ubatch_size: 4096
 
-# --- Monitoring: VRAM exporter + Prometheus scrape + Grafana dashboard -------
-# Phase 3: GPU/LLM monitoring deployment (Wong, 2026-08-18)
-# Provides: VRAM textfile exporter, Prometheus scrape config for llama-swap
-# /metrics endpoint, Grafana 6-panel dashboard, PrometheusRule alert rules.
-#
-# Ref: roles/llm-inference-multimodel/references/monitoring-llm-homelab-ciro-luciotta-2026.md
-llm_monitoring_enabled: true                          # gate for monitoring tasks
-llm_vram_exporter_script: /opt/llama-server-monitoring/nvidia-smi-vram-exporter.sh
-llm_vram_exporter_cron_minute: "*"                    # run every minute
-llm_vram_exporter_gpu_index: 0                        # GPU 0 (RTX 3090 on astro-orbiter)
-llm_vram_textfile_dir: /var/lib/node_exporter/textfile_collector
-
-# Alert thresholds (per Ciro Luciotta pattern)
-llm_vram_critical_mib: 24000                          # ~90% of 24GB RTX 3090
-llm_kv_cache_spill_ratio: 0.92                        # KV-cache spill threshold
-llm_throughput_baseline_tokens_per_min: 50            # baseline for degradation alert
-
-# Grafana dashboard
-llm_grafana_dashboard_uid: llama-swap-monitor
-llm_grafana_dashboard_title: "llama-swap GPU/LLM Monitoring"
-llm_grafana_dashboard_tags:
-  - llm
-  - llama-swap
-  - gpu-monitoring
-  - ciro-luciotta
-llm_grafana_dashboard_refresh: "30s"
-llm_grafana_dashboard_time_from: "now-24h"
-
-# Prometheus scrape job
-llm_prometheus_scrape_interval: "30s"
-llm_prometheus_scrape_timeout: "10s"
-
 # --- llama-swap mode (port 8001) -----------------------------------------------
 # Deploy llama-swap — Go-based hot-swap proxy (v250+) for model orchestration.
 # Replaces router mode entirely: single binary + YAML config.json, no --models-preset INI.
@@ -317,6 +285,35 @@ llm_swapmode_models:
     sleep_idle_seconds: -1 # never idle (always ready for embeddings)
     load_on_startup: true
 
+  # t_c5cef2b2 / t_664289a0 (2026-08-19): Qwen3-8B dual-thinking deployment.
+  # Both variants point to the same GGUF. GPU-resident (~5.2GB each).
+  # Cannot co-reside with Qwen3.8-27B-Q4_K_M; LRU eviction applies.
+  # chat_template_file for no_think variant: {{ llm_models_dir }}/templates/qwen3-no-think.jinja
+  - id: Qwen3-8B-Q4_K_M
+    gguf_path: "{{ llm_models_dir }}/Qwen3-8B-Q4_K_M.gguf"
+    port: 8106
+    n_gpu_layers: 99       # GPU-resident (thinking variant)
+    ctx_size: 32768
+    batch_size: 4096
+    ubatch_size: 4096
+    parallel: 1
+    cache_type: q4_0
+    flash_attn: "true"
+    sleep_idle_seconds: 60  # idle after 60s no requests
+
+  - id: Qwen3-8B-Q4_K_M-no_think
+    gguf_path: "{{ llm_models_dir }}/Qwen3-8B-Q4_K_M.gguf"
+    port: 8107
+    n_gpu_layers: 99       # GPU-resident (no-think variant)
+    ctx_size: 32768
+    batch_size: 4096
+    ubatch_size: 4096
+    parallel: 1
+    cache_type: q4_0
+    flash_attn: "true"
+    sleep_idle_seconds: 60
+    chat_template_file: "{{ llm_models_dir }}/templates/qwen3-no-think.jinja"
+
 # llama-swap matrix routing configuration
 # Each row defines a set of models that can be co-resident and hot-swappable
 # Syntax: "model1 & model2" = both models in same row (via v250 expression DSL)
@@ -335,3 +332,14 @@ llm_swapmode_matrix_rows:
 
   - row: row4
     expr: "Phi-3.5-mini-instruct-Q8_0 & nomic-embed-text-v1.5"      # Mini + embed
+
+  # t_c5cef2b2 / t_664289a0 (2026-08-19): Qwen3-8B dual-thinking rows.
+  # Both Qwen3-8B variants co-reside with nomic-embed but NOT with
+  # Qwen3.8-27B-Q4_K_M (17.8GB). LRU eviction swaps between primary and
+  # Qwen3-8B when needed. They CAN co-reside with each other (~10.4GB total)
+  # but NOT simultaneously with Qwen3.8-27B.
+  - row: row5
+    expr: "Qwen3-8B-Q4_K_M & nomic-embed-text-v1.5"                  # Thinking variant + embed
+
+  - row: row6
+    expr: "Qwen3-8B-Q4_K_M-no_think & nomic-embed-text-v1.5"          # No-think variant + embed

ansible/roles/llm-inference-multimodel/tasks/models.yml

@@ -74,3 +74,30 @@
   loop_control:
     loop_var: staged_model
   tags: [models]
+
+# --- Chat template overrides ---------------------------------------------------
+# Deploy per-model chat template files used by llama-server via chat-template-file.
+# These are static files dropped into {{ llm_models_dir }}/templates/.
+# t_664289a0: qwen3-no-think.jinja — Qwen3 template with enable_thinking=false
+#   hardcoded. Used by [Qwen3-8B-Q4_K_M-no_think] in the router preset INI and
+#   the llama-swap config. The companion [Qwen3-8B-Q4_K_M] section uses the GGUF's
+#   baked-in template (thinking ON by default).
+- name: Ensure chat template directory exists at {{ llm_models_dir }}/templates
+  ansible.builtin.file:
+    path: "{{ llm_models_dir }}/templates"
+    state: directory
+    owner: "{{ llm_service_user }}"
+    group: "{{ llm_service_user }}"
+    mode: "0755"
+  become: true
+  tags: [models, chat_templates]
+
+- name: Deploy qwen3-no-think.jinja (thinking=false hard-switch for Qwen3-8B no_think variant)
+  ansible.builtin.template:
+    src: qwen3-no-think.jinja.j2
+    dest: "{{ llm_models_dir }}/templates/qwen3-no-think.jinja"
+    owner: "{{ llm_service_user }}"
+    group: "{{ llm_service_user }}"
+    mode: "0644"
+  become: true
+  tags: [models, chat_templates]

ansible/roles/llm-inference-multimodel/tasks/swapmode.yml

@@ -241,12 +241,12 @@
   when: llm_swapmode_enabled | default(false)
   tags: [swapmode_verify]
 
-- name: "[swapmode_verify] Assert all 5 models are discoverable"
+- name: "[swapmode_verify] Assert all 7 models are discoverable"
   ansible.builtin.assert:
     that:
-      - llm_swapmode_models_list.json.data | map(attribute='id') | list | length == 5
+      - llm_swapmode_models_list.json.data | map(attribute='id') | list | length == 7
     fail_msg: >-
-      Expected 5 models in /v1/models response, got {{ llm_swapmode_models_list.json.data | length }}.
+      Expected 7 models in /v1/models response, got {{ llm_swapmode_models_list.json.data | length }}.
       Models: {{ llm_swapmode_models_list.json.data | map(attribute='id') | list }}
   when: llm_swapmode_enabled | default(false)
   tags: [swapmode_verify]
@@ -300,5 +300,6 @@
       ✓ GATE 4: VRAM guard ({{ llm_swapmode_vram_used.stdout }} MiB < {{ llm_swapmode_vram_max_mib }} MiB) PASS
       
       llama-swap service is ready at http://{{ llm_swapmode_bind_address }}:{{ llm_swapmode_port }}/
+      NOTE: 7 models registered (5 original + Qwen3-8B-Q4_K_M + Qwen3-8B-Q4_K_M-no_think).
   when: llm_swapmode_enabled | default(false)
   tags: [swapmode_verify]

ansible/roles/llm-inference-multimodel/templates/llama-server-router-preset.ini.j2

@@ -207,3 +207,56 @@ rope-scaling       = yarn
 rope-freq-scale    = 0.75
 load-on-startup    = true
 sleep-idle-seconds = -1
+
+; --- Auxiliary model: Qwen3-8B-Q4_K_M (thinking variant) ----------------------
+; GGUF: bartowski/Qwen_Qwen3-8B-GGUF (5,027,784,224 bytes)
+; Thinking mode: ON BY DEFAULT (Qwen3 baked-in template, no override).
+;   - Use for complex aux tasks: long-context summarization, multi-step tool
+;     planning, structured extraction requiring CoT.
+;   - To suppress thinking at request time, send /no_think prefix in the prompt
+;     OR route to [Qwen3-8B-Q4_K_M-no_think] section below.
+; n-gpu-layers=99: GPU-resident (~5.2GB VRAM). Cannot co-reside with
+;   Qwen3.8-27B-Q4_K_M (17.8GB). LRU eviction handles swapping.
+; ctx-size=32768: 32K context, q4_0 KV cache.
+; flash-attn=true: required for Qwen3 architecture at this context size.
+; sleep-idle-seconds=60: evict after 60s idle (free VRAM for primary model).
+; Added: t_c5cef2b2 (2026-08-19, War Machine) — initial Qwen3-8B deployment.
+[Qwen3-8B-Q4_K_M]
+model              = {{ llm_models_dir }}/Qwen3-8B-Q4_K_M.gguf
+n-gpu-layers       = 99
+ctx-size           = 32768
+flash-attn         = true
+cache-type-k       = {{ llm_router_cache_type_k }}
+cache-type-v       = {{ llm_router_cache_type_v }}
+batch-size         = {{ llm_router_batch_size }}
+ubatch-size        = {{ llm_router_ubatch_size }}
+parallel           = {{ llm_router_parallel }}
+sleep-idle-seconds = 60
+
+; --- Auxiliary model: Qwen3-8B-Q4_K_M (no-think variant) ----------------------
+; Secondary section serving the SAME GGUF with enable_thinking=False via an
+; overridden Jinja2 template. This gives low-latency, non-reasoning inference
+; for latency-sensitive aux tasks (intent classification, query rewriting,
+; structured extraction, tool-call construction, draft generation).
+;
+; Both sections point to the same .gguf file — llama-server spawns independent
+; child processes. VRAM cost: ~5.2GB per instance (~10.4GB total). Fits on
+; RTX 3090 24GB alongside nomic-embed (84MB).
+;
+; Thinking variant (Qwen3-8B-Q4_K_M) remains available for complex tasks that
+; benefit from CoT (long-context summarization, multi-step tool planning).
+;
+; Cannot co-reside with Qwen3.8-27B-Q4_K_M (17.8GB); LRU eviction applies.
+; Added: t_664289a0 (2026-08-19, War Machine) — dual thinking deployment.
+[Qwen3-8B-Q4_K_M-no_think]
+model              = {{ llm_models_dir }}/Qwen3-8B-Q4_K_M.gguf
+n-gpu-layers       = 99
+ctx-size           = 32768
+flash-attn         = true
+cache-type-k       = {{ llm_router_cache_type_k }}
+cache-type-v       = {{ llm_router_cache_type_v }}
+batch-size         = {{ llm_router_batch_size }}
+ubatch-size        = {{ llm_router_ubatch_size }}
+parallel           = {{ llm_router_parallel }}
+chat-template-file = {{ llm_models_dir }}/templates/qwen3-no-think.jinja
+sleep-idle-seconds = 60

ansible/roles/llm-inference-multimodel/templates/llama-swap-config.yaml.j2

@@ -39,6 +39,7 @@ models:
       --parallel {{ model.parallel }}
       {% if model.cache_type is defined %}--cache-type-k {{ model.cache_type }} --cache-type-v {{ model.cache_type }}{% endif %}
       {% if model.flash_attn is defined %}--flash-attn {{ model.flash_attn }}{% endif %}
+      {% if model.chat_template_file is defined %}--chat-template-file {{ model.chat_template_file }}{% endif %}
       {% if model.sleep_idle_seconds is defined %}--sleep-idle-seconds {{ model.sleep_idle_seconds }}{% endif %}
       {% if model.load_on_startup is defined and model.load_on_startup %}--load-on-startup{% endif %}
       --host 127.0.0.1

ansible/roles/llm-inference-multimodel/templates/qwen3-no-think.jinja.j2

@@ -0,0 +1,103 @@
+{#
+  FILE: roles/llm-inference-multimodel/templates/qwen3-no-think.jinja.j2
+  DESCRIPTION: Qwen3 chat template with enable_thinking unconditionally false.
+
+  This is a chat-template FILE deployed to {{ llm_models_dir }}/templates/qwen3-no-think.jinja
+  on astro-orbiter and referenced via chat-template-file in the INI preset for
+  [Qwen3-8B-Q4_K_M-no_think]. The [Qwen3-8B-Q4_K_M] section uses the model's
+  baked-in default template (thinking ON by default).
+
+  Mechanism: at the add_generation_prompt step, instead of checking
+    "enable_thinking is defined and enable_thinking is false"
+  we UNCONDITIONALLY emit the empty <think></think> prefix that suppresses CoT.
+  This is the hard-switch documented in the Qwen3 template spec and confirmed in
+  https://huggingface.co/blog/qwen-3-chat-template-deep-dive (section 1).
+
+  All other logic is identical to /opt/llama.cpp/models/templates/Qwen-Qwen3-0.6B.jinja
+  (the shipped template for Qwen3). Only the final add_generation_prompt block differs.
+
+  Added: t_664289a0 (2026-08-19, War Machine) — dual thinking deployment.
+#}
+{%- if tools %}
+    {{- '<|im_start|>system\n' }}
+    {%- if messages[0].role == 'system' %}
+        {{- messages[0].content + '\n\n' }}
+    {%- endif %}
+    {{- "# Tools\n\nYou may call one or more functions to assist with the user query.\n\nYou are provided with function signatures within <tools></tools> XML tags:\n<tools>" }}
+    {%- for tool in tools %}
+        {{- "\n" }}
+        {{- tool | tojson }}
+    {%- endfor %}
+    {{- "\n</tools>\n\nFor each function call, return a json object with function name and arguments within <tool_call></tool_call> XML tags:\n<tool_call>\n{\"name\": <function-name>, \"arguments\": <args-json-object>}\n</tool_call><|im_end|>\n" }}
+{%- else %}
+    {%- if messages[0].role == 'system' %}
+        {{- '<|im_start|>system\n' + messages[0].content + '<|im_end|>\n' }}
+    {%- endif %}
+{%- endif %}
+{%- set ns = namespace(multi_step_tool=true, last_query_index=messages|length - 1) %}
+{%- for message in messages[::-1] %}
+    {%- set index = (messages|length - 1) - loop.index0 %}
+    {%- if ns.multi_step_tool and message.role == "user" and not(message.content.startswith('<tool_response>') and message.content.endswith('</tool_response>')) %}
+        {%- set ns.multi_step_tool = false %}
+        {%- set ns.last_query_index = index %}
+    {%- endif %}
+{%- endfor %}
+{%- for message in messages %}
+    {%- if (message.role == "user") or (message.role == "system" and not loop.first) %}
+        {{- '<|im_start|>' + message.role + '\n' + message.content + '<|im_end|>' + '\n' }}
+    {%- elif message.role == "assistant" %}
+        {%- set content = message.content %}
+        {%- set reasoning_content = '' %}
+        {%- if message.reasoning_content is defined and message.reasoning_content is not none %}
+            {%- set reasoning_content = message.reasoning_content %}
+        {%- else %}
+            {%- if '</think>' in message.content %}
+                {%- set content = message.content.split('</think>')[-1].lstrip('\n') %}
+                {%- set reasoning_content = message.content.split('</think>')[0].rstrip('\n').split('<think>')[-1].lstrip('\n') %}
+            {%- endif %}
+        {%- endif %}
+        {%- if loop.index0 > ns.last_query_index %}
+            {%- if loop.last or (not loop.last and reasoning_content) %}
+                {{- '<|im_start|>' + message.role + '\n<think>\n' + reasoning_content.strip('\n') + '\n</think>\n\n' + content.lstrip('\n') }}
+            {%- else %}
+                {{- '<|im_start|>' + message.role + '\n' + content }}
+            {%- endif %}
+        {%- else %}
+            {{- '<|im_start|>' + message.role + '\n' + content }}
+        {%- endif %}
+        {%- if message.tool_calls %}
+            {%- for tool_call in message.tool_calls %}
+                {%- if (loop.first and content) or (not loop.first) %}
+                    {{- '\n' }}
+                {%- endif %}
+                {%- if tool_call.function %}
+                    {%- set tool_call = tool_call.function %}
+                {%- endif %}
+                {{- '<tool_call>\n{"name": "' }}
+                {{- tool_call.name }}
+                {{- '", "arguments": ' }}
+                {%- if tool_call.arguments is string %}
+                    {{- tool_call.arguments }}
+                {%- else %}
+                    {{- tool_call.arguments | tojson }}
+                {%- endif %}
+                {{- '}\n</tool_call>' }}
+            {%- endfor %}
+        {%- endif %}
+        {{- '<|im_end|>\n' }}
+    {%- elif message.role == "tool" %}
+        {%- if loop.first or (messages[loop.index0 - 1].role != "tool") %}
+            {{- '<|im_start|>user' }}
+        {%- endif %}
+        {{- '\n<tool_response>\n' }}
+        {{- message.content }}
+        {{- '\n</tool_response>' }}
+        {%- if loop.last or (messages[loop.index0 + 1].role != "tool") %}
+            {{- '<|im_end|>\n' }}
+        {%- endif %}
+    {%- endif %}
+{%- endfor %}
+{%- if add_generation_prompt %}
+    {{- '<|im_start|>assistant\n' }}
+    {{- '<think>\n\n</think>\n\n' }}
+{%- endif %}