Author docker-compose stack: llama.cpp (ROCm) + Open WebUI + Qdrant + Lazytainer

Resolves wayfinder ticket #4. Wires up the locked decisions from the map:
- llama.cpp (ghcr.io/ggml-org/llama.cpp:server-rocm, gfx1201) serving
  Qwen3.8-27B-UD-Q4_K_XL.gguf, port published for direct Claude Code CLI /
  Kimi CLI access alongside Open WebUI.
- Open WebUI with WEBUI_AUTH on, RAG+Memory wired to a standalone Qdrant
  service.
- Lazytainer labels on llama-server for a 15 min idle-stop.
- Named Docker volumes only (models, qdrant-data, openwebui-data) — no host
  bind-mounts.
- One-off 'downloader' compose profile instead of a host-side script with
  its own dependencies, wrapped by scripts/download-model.sh.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

.env.example

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+# Copy to .env and adjust. All values below are defaults baked into
+# docker-compose.yml — only uncomment/change what you actually want to override.
+
+# --- llama.cpp / model ---
+LLAMA_MODEL_FILE=Qwen3.8-27B-UD-Q4_K_XL.gguf
+LLAMA_GPU_LAYERS=999
+# 65536 (64K) fits comfortably in 32GB VRAM alongside the model weights.
+# Raise toward 131072 if you need more context; see docs/research/qwen3.8-27b-quant.md
+# for the VRAM math at larger context sizes.
+LLAMA_CTX_SIZE=65536
+LLAMA_PORT=8080
+
+# --- Open WebUI ---
+WEBUI_PORT=3000
+# Dummy key — llama.cpp's OpenAI-compatible endpoint doesn't check it, but
+# Open WebUI requires the field to be non-empty.
+OPENAI_API_KEY=local
+
+# --- Lazytainer ---
+# Seconds of inactivity before llama-server is stopped. 900 = 15 min.
+LAZYTAINER_INACTIVE_TIMEOUT=900

README.md

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+# LLM-Server
+
+Local AI inference stack: llama.cpp (ROCm) serving Qwen3.8-27B on an AMD Radeon AI PRO R9700, fronted by Open WebUI (RAG + Memory via Qdrant), with Lazytainer auto-suspending the inference container when idle.
+
+See the wayfinder map ([issue #1](https://git.arthurerlich.de/haylan/LLM-Server/issues/1)) for the full architecture rationale and open questions.
+
+## Quickstart
+
+```bash
+cp .env.example .env      # adjust if needed
+./scripts/download-model.sh
+docker compose up -d
+```
+
+- Open WebUI: http://localhost:3000 (first signup becomes the admin account — `WEBUI_AUTH` is on)
+- llama.cpp OpenAI-compatible API: http://localhost:8080/v1
+- llama.cpp Anthropic Messages API (for Claude Code CLI): http://localhost:8080/v1/messages
+
+Pointing Claude Code CLI or Kimi CLI at the local endpoint is documented separately — see [issue #6](https://git.arthurerlich.de/haylan/LLM-Server/issues/6) once resolved.
+
+**Known risk**: Qwen3.8-27B's tool-calling reliability against llama.cpp's Anthropic shim is not yet verified (open upstream parser bugs against its model lineage) — see `docs/research/qwen3.8-27b-tool-calling.md`.

docker-compose.yml

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+services:
+  llama-server:
+    image: ghcr.io/ggml-org/llama.cpp:server-rocm
+    container_name: llama-server
+    devices:
+      - /dev/kfd
+      - /dev/dri
+    group_add:
+      - video
+      - render
+    security_opt:
+      - seccomp=unconfined
+    ipc: host
+    volumes:
+      - models:/models
+    command: >
+      -m /models/${LLAMA_MODEL_FILE:-Qwen3.8-27B-UD-Q4_K_XL.gguf}
+      --host 0.0.0.0
+      --port 8080
+      --n-gpu-layers ${LLAMA_GPU_LAYERS:-999}
+      --ctx-size ${LLAMA_CTX_SIZE:-65536}
+      --jinja
+    ports:
+      # published to the host so Claude Code CLI / Kimi CLI can reach it directly,
+      # bypassing Open WebUI.
+      - "${LLAMA_PORT:-8080}:8080"
+    restart: unless-stopped
+    networks: [ai-stack]
+    labels:
+      # ponytail: idle-timeout tuning lives here, not in a separate lazytainer config file —
+      # one place to look. Raise LAZYTAINER_INACTIVE_TIMEOUT if 15 min proves too eager.
+      - "lazytainer.group.llamaserver.sleepMethod=stop"
+      - "lazytainer.group.llamaserver.ports=8080"
+      - "lazytainer.group.llamaserver.inactiveTimeout=${LAZYTAINER_INACTIVE_TIMEOUT:-900}"
+      - "lazytainer.group.llamaserver.minPacketThreshold=2"
+
+  # ponytail: one-off downloader, not a standing service — run via
+  # `docker compose --profile tools run --rm downloader` (see scripts/download-model.sh).
+  # Keeps the model file inside the named `models` volume instead of a host bind-mount.
+  downloader:
+    image: curlimages/curl:latest
+    profiles: ["tools"]
+    volumes:
+      - models:/models
+    entrypoint: ["sh", "-c"]
+    command:
+      - >
+        curl -L --fail --create-dirs -o /models/${LLAMA_MODEL_FILE:-Qwen3.8-27B-UD-Q4_K_XL.gguf}
+        https://huggingface.co/unsloth/Qwen3.8-27B-GGUF/resolve/main/${LLAMA_MODEL_FILE:-Qwen3.8-27B-UD-Q4_K_XL.gguf}
+
+  qdrant:
+    image: qdrant/qdrant:latest
+    container_name: qdrant
+    volumes:
+      - qdrant-data:/qdrant/storage
+    restart: unless-stopped
+    networks: [ai-stack]
+
+  open-webui:
+    image: ghcr.io/open-webui/open-webui:main
+    container_name: open-webui
+    depends_on:
+      - qdrant
+    volumes:
+      - openwebui-data:/app/backend/data
+    environment:
+      - WEBUI_AUTH=True
+      - OPENAI_API_BASE_URL=http://llama-server:8080/v1
+      - OPENAI_API_KEY=${OPENAI_API_KEY:-local}
+      - VECTOR_DB=qdrant
+      - QDRANT_URI=http://qdrant:6333
+    ports:
+      - "${WEBUI_PORT:-3000}:8080"
+    restart: unless-stopped
+    networks: [ai-stack]
+
+  lazytainer:
+    image: ghcr.io/vmorganp/lazytainer:master
+    container_name: lazytainer
+    network_mode: host
+    volumes:
+      - /var/run/docker.sock:/var/run/docker.sock:ro
+    restart: unless-stopped
+    depends_on:
+      - llama-server
+
+networks:
+  ai-stack:
+
+volumes:
+  models:
+  qdrant-data:
+  openwebui-data:

scripts/download-model.sh

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+#!/usr/bin/env bash
+# Downloads the model GGUF straight into the `models` named volume via a
+# one-off container — no huggingface-cli or host bind-mount needed.
+#
+# ponytail: hardcodes the one model this stack is built for (see the
+# `downloader` service in docker-compose.yml for the actual URL/filename).
+# Set LLAMA_MODEL_FILE in .env first if you're using a different quant.
+set -euo pipefail
+cd "$(dirname "$0")/.."
+
+docker compose --profile tools run --rm downloader
+echo "Model downloaded into the 'models' volume."