From 1495dbe47670c4a9e06a2c53508e10fdc8094418 Mon Sep 17 00:00:00 2001
From: Till-JS <101404291+Till-JS@users.noreply.github.com>
Date: Thu, 29 Jan 2026 22:01:00 +0100
Subject: [PATCH] =?UTF-8?q?=E2=9C=A8=20feat(mana-llm):=20add=20central=20L?=
 =?UTF-8?q?LM=20abstraction=20service?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Python/FastAPI service providing unified OpenAI-compatible API for
Ollama and cloud LLM providers (OpenRouter, Groq, Together).

Features:
- Chat completions with streaming (SSE)
- Vision/multimodal support
- Embeddings generation
- Multi-provider routing (provider/model format)
- Prometheus metrics
- Optional Redis caching
---
 CLAUDE.md                                     |   6 +-
 services/mana-llm/.env.example                |  25 ++
 services/mana-llm/.gitignore                  |  31 ++
 services/mana-llm/CLAUDE.md                   | 292 ++++++++++++++++++
 services/mana-llm/Dockerfile                  |  45 +++
 services/mana-llm/docker-compose.dev.yml      |  15 +
 services/mana-llm/docker-compose.yml          |  50 +++
 services/mana-llm/pyproject.toml              |  38 +++
 services/mana-llm/requirements.txt            |  23 ++
 services/mana-llm/src/__init__.py             |   3 +
 services/mana-llm/src/config.py               |  48 +++
 services/mana-llm/src/main.py                 | 235 ++++++++++++++
 services/mana-llm/src/models/__init__.py      |  22 ++
 services/mana-llm/src/models/requests.py      |  57 ++++
 services/mana-llm/src/models/responses.py     |  99 ++++++
 services/mana-llm/src/providers/__init__.py   |  13 +
 services/mana-llm/src/providers/base.py       |  61 ++++
 services/mana-llm/src/providers/ollama.py     | 289 +++++++++++++++++
 .../mana-llm/src/providers/openai_compat.py   | 274 ++++++++++++++++
 services/mana-llm/src/providers/router.py     | 186 +++++++++++
 services/mana-llm/src/streaming/__init__.py   |   5 +
 services/mana-llm/src/streaming/sse.py        |  43 +++
 services/mana-llm/src/utils/__init__.py       |   5 +
 services/mana-llm/src/utils/cache.py          |  85 +++++
 services/mana-llm/src/utils/metrics.py        | 109 +++++++
 services/mana-llm/tests/__init__.py           |   1 +
 services/mana-llm/tests/test_api.py           |  41 +++
 services/mana-llm/tests/test_providers.py     | 113 +++++++
 services/mana-llm/tests/test_streaming.py     |  57 ++++
 29 files changed, 2270 insertions(+), 1 deletion(-)
 create mode 100644 services/mana-llm/.env.example
 create mode 100644 services/mana-llm/.gitignore
 create mode 100644 services/mana-llm/CLAUDE.md
 create mode 100644 services/mana-llm/Dockerfile
 create mode 100644 services/mana-llm/docker-compose.dev.yml
 create mode 100644 services/mana-llm/docker-compose.yml
 create mode 100644 services/mana-llm/pyproject.toml
 create mode 100644 services/mana-llm/requirements.txt
 create mode 100644 services/mana-llm/src/__init__.py
 create mode 100644 services/mana-llm/src/config.py
 create mode 100644 services/mana-llm/src/main.py
 create mode 100644 services/mana-llm/src/models/__init__.py
 create mode 100644 services/mana-llm/src/models/requests.py
 create mode 100644 services/mana-llm/src/models/responses.py
 create mode 100644 services/mana-llm/src/providers/__init__.py
 create mode 100644 services/mana-llm/src/providers/base.py
 create mode 100644 services/mana-llm/src/providers/ollama.py
 create mode 100644 services/mana-llm/src/providers/openai_compat.py
 create mode 100644 services/mana-llm/src/providers/router.py
 create mode 100644 services/mana-llm/src/streaming/__init__.py
 create mode 100644 services/mana-llm/src/streaming/sse.py
 create mode 100644 services/mana-llm/src/utils/__init__.py
 create mode 100644 services/mana-llm/src/utils/cache.py
 create mode 100644 services/mana-llm/src/utils/metrics.py
 create mode 100644 services/mana-llm/tests/__init__.py
 create mode 100644 services/mana-llm/tests/test_api.py
 create mode 100644 services/mana-llm/tests/test_providers.py
 create mode 100644 services/mana-llm/tests/test_streaming.py

diff --git a/CLAUDE.md b/CLAUDE.md
index b2599473f..389e2e1ab 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -143,7 +143,9 @@ manacore-monorepo/
 │   └── {game-name}/         # Individual games
 ├── services/                # Standalone microservices
 │   ├── mana-core-auth/      # Central authentication service
-│   └── mana-search/         # Central search & content extraction service
+│   ├── mana-search/         # Central search & content extraction service
+│   ├── mana-crawler/        # Web crawler service
+│   └── mana-llm/            # Central LLM abstraction service
 ├── packages/                # Monorepo-wide shared packages
 └── docker/                  # Docker configuration files
 ```
@@ -774,6 +776,8 @@ Each project has its own `CLAUDE.md` with detailed information:
 - `apps/picture/CLAUDE.md` - AI image generation
 - `services/mana-core-auth/` - Central authentication service
 - `services/mana-search/CLAUDE.md` - Search & content extraction service
+- `services/mana-crawler/CLAUDE.md` - Web crawler service
+- `services/mana-llm/CLAUDE.md` - Central LLM abstraction service
 
 Navigate to the specific project directory to work on it.
 
diff --git a/services/mana-llm/.env.example b/services/mana-llm/.env.example
new file mode 100644
index 000000000..f304f55f9
--- /dev/null
+++ b/services/mana-llm/.env.example
@@ -0,0 +1,25 @@
+# Service
+PORT=3025
+LOG_LEVEL=info
+
+# Ollama (Primary)
+OLLAMA_URL=http://localhost:11434
+OLLAMA_DEFAULT_MODEL=gemma3:4b
+OLLAMA_TIMEOUT=120
+
+# OpenRouter (Cloud Fallback)
+OPENROUTER_API_KEY=sk-or-v1-xxx
+OPENROUTER_DEFAULT_MODEL=meta-llama/llama-3.1-8b-instruct
+
+# Groq (Optional)
+GROQ_API_KEY=gsk_xxx
+
+# Together (Optional)
+TOGETHER_API_KEY=xxx
+
+# Caching (Optional)
+REDIS_URL=redis://localhost:6379
+CACHE_TTL=3600
+
+# CORS
+CORS_ORIGINS=http://localhost:5173,https://mana.how
diff --git a/services/mana-llm/.gitignore b/services/mana-llm/.gitignore
new file mode 100644
index 000000000..602e8abc4
--- /dev/null
+++ b/services/mana-llm/.gitignore
@@ -0,0 +1,31 @@
+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+*.so
+.Python
+venv/
+.venv/
+ENV/
+.env
+
+# IDE
+.idea/
+.vscode/
+*.swp
+*.swo
+
+# Testing
+.pytest_cache/
+.coverage
+htmlcov/
+.tox/
+
+# Build
+dist/
+build/
+*.egg-info/
+
+# Local
+.env.local
+*.log
diff --git a/services/mana-llm/CLAUDE.md b/services/mana-llm/CLAUDE.md
new file mode 100644
index 000000000..436bc036a
--- /dev/null
+++ b/services/mana-llm/CLAUDE.md
@@ -0,0 +1,292 @@
+# mana-llm
+
+Central LLM abstraction service providing a unified OpenAI-compatible API for Ollama and cloud LLM providers.
+
+## Overview
+
+mana-llm acts as a central gateway for all LLM requests in the monorepo, providing:
+- Unified OpenAI-compatible API
+- Provider routing (Ollama, OpenRouter, Groq, Together)
+- Streaming via Server-Sent Events (SSE)
+- Vision/multimodal support
+- Embeddings generation
+- Prometheus metrics
+
+## Architecture
+
+```
+┌─────────────────────────────────────────────────────────────────────┐
+│                        Consumer Apps                                 │
+│  matrix-ollama-bot │ telegram-ollama-bot │ chat-backend │ etc.     │
+└────────────────────────────────┬────────────────────────────────────┘
+                                 │ HTTP/SSE
+                                 ▼
+┌─────────────────────────────────────────────────────────────────────┐
+│                     mana-llm (Port 3025)                            │
+│  ┌─────────────┐  ┌─────────────┐  ┌─────────────┐                 │
+│  │   Router    │  │   Cache     │  │   Metrics   │                 │
+│  │ (Provider)  │  │  (Redis)    │  │ (Prometheus)│                 │
+│  └──────┬──────┘  └─────────────┘  └─────────────┘                 │
+│         │                                                           │
+│  ┌──────┴──────────────────────────────────────────┐               │
+│  │              Provider Adapters                   │               │
+│  │  ┌──────────┐  ┌──────────┐  ┌──────────────┐  │               │
+│  │  │  Ollama  │  │ OpenAI   │  │  OpenRouter  │  │               │
+│  │  │  Adapter │  │ Adapter  │  │   Adapter    │  │               │
+│  │  └──────────┘  └──────────┘  └──────────────┘  │               │
+│  └─────────────────────────────────────────────────┘               │
+└─────────────────────────────────────────────────────────────────────┘
+```
+
+## Quick Start
+
+### Prerequisites
+
+- Python 3.11+
+- Ollama running locally (http://localhost:11434)
+- Redis (optional, for caching)
+
+### Development
+
+```bash
+cd services/mana-llm
+
+# Create virtual environment
+python -m venv venv
+source venv/bin/activate  # or venv\Scripts\activate on Windows
+
+# Install dependencies
+pip install -r requirements.txt
+
+# Copy environment file
+cp .env.example .env
+
+# Start Redis (optional)
+docker-compose -f docker-compose.dev.yml up -d
+
+# Run service
+python -m uvicorn src.main:app --port 3025 --reload
+```
+
+### Docker
+
+```bash
+# Full stack (mana-llm + Redis)
+docker-compose up -d
+
+# View logs
+docker-compose logs -f mana-llm
+```
+
+## API Endpoints
+
+### Chat Completions
+
+```bash
+# Non-streaming
+curl -X POST http://localhost:3025/v1/chat/completions \
+  -H "Content-Type: application/json" \
+  -d '{
+    "model": "ollama/gemma3:4b",
+    "messages": [{"role": "user", "content": "Hello!"}],
+    "stream": false
+  }'
+
+# Streaming (SSE)
+curl -X POST http://localhost:3025/v1/chat/completions \
+  -H "Content-Type: application/json" \
+  -d '{
+    "model": "ollama/gemma3:4b",
+    "messages": [{"role": "user", "content": "Hello!"}],
+    "stream": true
+  }'
+```
+
+### Vision/Multimodal
+
+```bash
+curl -X POST http://localhost:3025/v1/chat/completions \
+  -H "Content-Type: application/json" \
+  -d '{
+    "model": "ollama/llava:7b",
+    "messages": [{
+      "role": "user",
+      "content": [
+        {"type": "text", "text": "What is in this image?"},
+        {"type": "image_url", "image_url": {"url": "data:image/png;base64,..."}}
+      ]
+    }]
+  }'
+```
+
+### Models
+
+```bash
+# List all models
+curl http://localhost:3025/v1/models
+
+# Get specific model
+curl http://localhost:3025/v1/models/ollama/gemma3:4b
+```
+
+### Embeddings
+
+```bash
+curl -X POST http://localhost:3025/v1/embeddings \
+  -H "Content-Type: application/json" \
+  -d '{
+    "model": "ollama/nomic-embed-text",
+    "input": "Text to embed"
+  }'
+```
+
+### Health & Metrics
+
+```bash
+# Health check
+curl http://localhost:3025/health
+
+# Prometheus metrics
+curl http://localhost:3025/metrics
+```
+
+## Provider Routing
+
+Models use the format `provider/model`:
+
+| Model | Provider | Target |
+|-------|----------|--------|
+| `ollama/gemma3:4b` | Ollama | localhost:11434 |
+| `ollama/llava:7b` | Ollama | localhost:11434 |
+| `openrouter/meta-llama/llama-3.1-8b-instruct` | OpenRouter | api.openrouter.ai |
+| `groq/llama-3.1-8b-instant` | Groq | api.groq.com |
+| `together/meta-llama/Meta-Llama-3.1-8B-Instruct-Turbo` | Together | api.together.xyz |
+
+**Default:** If no provider prefix is given (e.g., `gemma3:4b`), Ollama is used.
+
+## Configuration
+
+Environment variables (see `.env.example`):
+
+| Variable | Default | Description |
+|----------|---------|-------------|
+| `PORT` | 3025 | Service port |
+| `LOG_LEVEL` | info | Logging level |
+| `OLLAMA_URL` | http://localhost:11434 | Ollama server URL |
+| `OLLAMA_DEFAULT_MODEL` | gemma3:4b | Default Ollama model |
+| `OLLAMA_TIMEOUT` | 120 | Ollama request timeout (seconds) |
+| `OPENROUTER_API_KEY` | - | OpenRouter API key |
+| `GROQ_API_KEY` | - | Groq API key |
+| `TOGETHER_API_KEY` | - | Together API key |
+| `REDIS_URL` | - | Redis URL for caching |
+| `CACHE_TTL` | 3600 | Cache TTL in seconds |
+| `CORS_ORIGINS` | localhost | Allowed CORS origins |
+
+## Project Structure
+
+```
+services/mana-llm/
+├── src/
+│   ├── main.py                 # FastAPI app entry point
+│   ├── config.py               # Settings via pydantic-settings
+│   ├── providers/
+│   │   ├── base.py             # Abstract provider interface
+│   │   ├── ollama.py           # Ollama provider
+│   │   ├── openai_compat.py    # OpenAI-compatible provider
+│   │   └── router.py           # Provider routing logic
+│   ├── models/
+│   │   ├── requests.py         # Request Pydantic models
+│   │   └── responses.py        # Response Pydantic models
+│   ├── streaming/
+│   │   └── sse.py              # SSE response handling
+│   └── utils/
+│       ├── cache.py            # Redis caching
+│       └── metrics.py          # Prometheus metrics
+├── tests/
+│   ├── test_api.py             # API endpoint tests
+│   ├── test_providers.py       # Provider tests
+│   └── test_streaming.py       # Streaming tests
+├── Dockerfile
+├── docker-compose.yml
+├── docker-compose.dev.yml
+├── requirements.txt
+├── pyproject.toml
+└── .env.example
+```
+
+## Testing
+
+```bash
+# Run tests
+pytest
+
+# Run with coverage
+pytest --cov=src
+
+# Run specific test file
+pytest tests/test_providers.py -v
+```
+
+## Integration Example
+
+### TypeScript/Node.js Client
+
+```typescript
+// Using fetch
+const response = await fetch('http://localhost:3025/v1/chat/completions', {
+  method: 'POST',
+  headers: { 'Content-Type': 'application/json' },
+  body: JSON.stringify({
+    model: 'ollama/gemma3:4b',
+    messages: [{ role: 'user', content: 'Hello!' }],
+    stream: false,
+  }),
+});
+
+const data = await response.json();
+console.log(data.choices[0].message.content);
+```
+
+### Streaming with EventSource
+
+```typescript
+const response = await fetch('http://localhost:3025/v1/chat/completions', {
+  method: 'POST',
+  headers: { 'Content-Type': 'application/json' },
+  body: JSON.stringify({
+    model: 'ollama/gemma3:4b',
+    messages: [{ role: 'user', content: 'Hello!' }],
+    stream: true,
+  }),
+});
+
+const reader = response.body?.getReader();
+const decoder = new TextDecoder();
+
+while (true) {
+  const { done, value } = await reader!.read();
+  if (done) break;
+
+  const chunk = decoder.decode(value);
+  const lines = chunk.split('\n').filter(line => line.startsWith('data: '));
+
+  for (const line of lines) {
+    const data = line.slice(6);
+    if (data === '[DONE]') break;
+
+    const parsed = JSON.parse(data);
+    const content = parsed.choices[0]?.delta?.content;
+    if (content) process.stdout.write(content);
+  }
+}
+```
+
+## Related Services
+
+| Service | Port | Description |
+|---------|------|-------------|
+| mana-tts | 3022 | Text-to-speech service |
+| mana-stt | 3023 | Speech-to-text service |
+| mana-search | 3021 | Web search & extraction |
+| matrix-ollama-bot | - | Matrix bot (consumer) |
+| telegram-ollama-bot | - | Telegram bot (consumer) |
diff --git a/services/mana-llm/Dockerfile b/services/mana-llm/Dockerfile
new file mode 100644
index 000000000..58c3ddc21
--- /dev/null
+++ b/services/mana-llm/Dockerfile
@@ -0,0 +1,45 @@
+# Build stage
+FROM python:3.12-slim AS builder
+
+WORKDIR /app
+
+# Install build dependencies
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    build-essential \
+    && rm -rf /var/lib/apt/lists/*
+
+# Copy requirements first for caching
+COPY requirements.txt .
+RUN pip install --no-cache-dir --user -r requirements.txt
+
+# Production stage
+FROM python:3.12-slim
+
+WORKDIR /app
+
+# Create non-root user
+RUN useradd -m -u 1000 appuser
+
+# Copy installed packages from builder
+COPY --from=builder /root/.local /home/appuser/.local
+
+# Copy application code
+COPY --chown=appuser:appuser src/ ./src/
+
+# Set environment
+ENV PATH=/home/appuser/.local/bin:$PATH
+ENV PYTHONUNBUFFERED=1
+ENV PYTHONDONTWRITEBYTECODE=1
+
+# Switch to non-root user
+USER appuser
+
+# Expose port
+EXPOSE 3025
+
+# Health check
+HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
+    CMD python -c "import httpx; httpx.get('http://localhost:3025/health').raise_for_status()"
+
+# Run application
+CMD ["python", "-m", "uvicorn", "src.main:app", "--host", "0.0.0.0", "--port", "3025"]
diff --git a/services/mana-llm/docker-compose.dev.yml b/services/mana-llm/docker-compose.dev.yml
new file mode 100644
index 000000000..fe41d1aee
--- /dev/null
+++ b/services/mana-llm/docker-compose.dev.yml
@@ -0,0 +1,15 @@
+# Development compose - only Redis (run Python locally)
+version: "3.8"
+
+services:
+  redis:
+    image: redis:7-alpine
+    container_name: mana-llm-redis-dev
+    ports:
+      - "6380:6379"
+    volumes:
+      - redis-data-dev:/data
+    restart: unless-stopped
+
+volumes:
+  redis-data-dev:
diff --git a/services/mana-llm/docker-compose.yml b/services/mana-llm/docker-compose.yml
new file mode 100644
index 000000000..8b4df0008
--- /dev/null
+++ b/services/mana-llm/docker-compose.yml
@@ -0,0 +1,50 @@
+version: "3.8"
+
+services:
+  mana-llm:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    container_name: mana-llm
+    ports:
+      - "3025:3025"
+    environment:
+      - PORT=3025
+      - LOG_LEVEL=info
+      - OLLAMA_URL=http://host.docker.internal:11434
+      - OLLAMA_DEFAULT_MODEL=gemma3:4b
+      - OLLAMA_TIMEOUT=120
+      - REDIS_URL=redis://redis:6379
+      # Add API keys via .env file
+      - OPENROUTER_API_KEY=${OPENROUTER_API_KEY:-}
+      - GROQ_API_KEY=${GROQ_API_KEY:-}
+      - TOGETHER_API_KEY=${TOGETHER_API_KEY:-}
+      - CORS_ORIGINS=http://localhost:5173,http://localhost:3000,https://mana.how
+    depends_on:
+      - redis
+    restart: unless-stopped
+    healthcheck:
+      test: ["CMD", "python", "-c", "import httpx; httpx.get('http://localhost:3025/health').raise_for_status()"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+      start_period: 10s
+    extra_hosts:
+      - "host.docker.internal:host-gateway"
+
+  redis:
+    image: redis:7-alpine
+    container_name: mana-llm-redis
+    ports:
+      - "6380:6379"
+    volumes:
+      - redis-data:/data
+    restart: unless-stopped
+    healthcheck:
+      test: ["CMD", "redis-cli", "ping"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+
+volumes:
+  redis-data:
diff --git a/services/mana-llm/pyproject.toml b/services/mana-llm/pyproject.toml
new file mode 100644
index 000000000..36d490d6e
--- /dev/null
+++ b/services/mana-llm/pyproject.toml
@@ -0,0 +1,38 @@
+[project]
+name = "mana-llm"
+version = "0.1.0"
+description = "Central LLM abstraction service for Ollama and OpenAI-compatible APIs"
+requires-python = ">=3.11"
+dependencies = [
+    "fastapi>=0.115.0",
+    "uvicorn[standard]>=0.32.0",
+    "pydantic>=2.10.0",
+    "pydantic-settings>=2.6.0",
+    "httpx>=0.28.0",
+    "sse-starlette>=2.2.0",
+    "redis>=5.2.0",
+    "prometheus-client>=0.21.0",
+]
+
+[project.optional-dependencies]
+dev = [
+    "pytest>=8.3.0",
+    "pytest-asyncio>=0.24.0",
+    "pytest-httpx>=0.35.0",
+    "ruff>=0.8.0",
+]
+
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[tool.ruff]
+line-length = 100
+target-version = "py311"
+
+[tool.ruff.lint]
+select = ["E", "F", "I", "W"]
+
+[tool.pytest.ini_options]
+asyncio_mode = "auto"
+testpaths = ["tests"]
diff --git a/services/mana-llm/requirements.txt b/services/mana-llm/requirements.txt
new file mode 100644
index 000000000..92576db4b
--- /dev/null
+++ b/services/mana-llm/requirements.txt
@@ -0,0 +1,23 @@
+# Core
+fastapi>=0.115.0
+uvicorn[standard]>=0.32.0
+pydantic>=2.10.0
+pydantic-settings>=2.6.0
+
+# HTTP Client
+httpx>=0.28.0
+
+# Streaming
+sse-starlette>=2.2.0
+
+# Caching (optional)
+redis>=5.2.0
+
+# Metrics
+prometheus-client>=0.21.0
+
+# Dev
+pytest>=8.3.0
+pytest-asyncio>=0.24.0
+pytest-httpx>=0.35.0
+ruff>=0.8.0
diff --git a/services/mana-llm/src/__init__.py b/services/mana-llm/src/__init__.py
new file mode 100644
index 000000000..202451520
--- /dev/null
+++ b/services/mana-llm/src/__init__.py
@@ -0,0 +1,3 @@
+"""mana-llm - Central LLM abstraction service."""
+
+__version__ = "0.1.0"
diff --git a/services/mana-llm/src/config.py b/services/mana-llm/src/config.py
new file mode 100644
index 000000000..651e47fef
--- /dev/null
+++ b/services/mana-llm/src/config.py
@@ -0,0 +1,48 @@
+"""Configuration settings for mana-llm service."""
+
+from pydantic_settings import BaseSettings
+
+
+class Settings(BaseSettings):
+    """Application settings loaded from environment variables."""
+
+    # Service
+    port: int = 3025
+    log_level: str = "info"
+
+    # Ollama (Primary provider)
+    ollama_url: str = "http://localhost:11434"
+    ollama_default_model: str = "gemma3:4b"
+    ollama_timeout: int = 120
+
+    # OpenRouter (Cloud fallback)
+    openrouter_api_key: str | None = None
+    openrouter_base_url: str = "https://openrouter.ai/api/v1"
+    openrouter_default_model: str = "meta-llama/llama-3.1-8b-instruct"
+
+    # Groq (Optional)
+    groq_api_key: str | None = None
+    groq_base_url: str = "https://api.groq.com/openai/v1"
+
+    # Together (Optional)
+    together_api_key: str | None = None
+    together_base_url: str = "https://api.together.xyz/v1"
+
+    # Caching (Optional)
+    redis_url: str | None = None
+    cache_ttl: int = 3600
+
+    # CORS
+    cors_origins: str = "http://localhost:5173,https://mana.how"
+
+    @property
+    def cors_origins_list(self) -> list[str]:
+        """Parse CORS origins from comma-separated string."""
+        return [origin.strip() for origin in self.cors_origins.split(",")]
+
+    class Config:
+        env_file = ".env"
+        env_file_encoding = "utf-8"
+
+
+settings = Settings()
diff --git a/services/mana-llm/src/main.py b/services/mana-llm/src/main.py
new file mode 100644
index 000000000..6607807f7
--- /dev/null
+++ b/services/mana-llm/src/main.py
@@ -0,0 +1,235 @@
+"""Main FastAPI application for mana-llm service."""
+
+import logging
+import time
+from contextlib import asynccontextmanager
+from typing import Any
+
+from fastapi import FastAPI, HTTPException, Request
+from fastapi.middleware.cors import CORSMiddleware
+from fastapi.responses import Response
+from sse_starlette.sse import EventSourceResponse
+
+from src.config import settings
+from src.models import (
+    ChatCompletionRequest,
+    ChatCompletionResponse,
+    EmbeddingRequest,
+    EmbeddingResponse,
+    ModelInfo,
+    ModelsResponse,
+)
+from src.providers import ProviderRouter
+from src.streaming import stream_chat_completion
+from src.utils.cache import close_redis
+from src.utils.metrics import get_metrics, record_llm_error, record_llm_request
+
+# Configure logging
+logging.basicConfig(
+    level=getattr(logging, settings.log_level.upper()),
+    format="%(asctime)s - %(name)s - %(levelname)s - %(message)s",
+)
+logger = logging.getLogger(__name__)
+
+# Global router instance
+router: ProviderRouter | None = None
+
+
+@asynccontextmanager
+async def lifespan(app: FastAPI):
+    """Application lifespan management."""
+    global router
+
+    # Startup
+    logger.info("Starting mana-llm service...")
+    router = ProviderRouter()
+    logger.info(f"Initialized providers: {list(router.providers.keys())}")
+
+    yield
+
+    # Shutdown
+    logger.info("Shutting down mana-llm service...")
+    if router:
+        await router.close()
+    await close_redis()
+
+
+# Create FastAPI app
+app = FastAPI(
+    title="mana-llm",
+    description="Central LLM abstraction service for Ollama and OpenAI-compatible APIs",
+    version="0.1.0",
+    lifespan=lifespan,
+)
+
+# Add CORS middleware
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=settings.cors_origins_list,
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+
+# Health endpoint
+@app.get("/health")
+async def health_check() -> dict[str, Any]:
+    """Check service health and provider status."""
+    if router is None:
+        return {"status": "unhealthy", "error": "Router not initialized"}
+
+    provider_health = await router.health_check()
+    return {
+        "status": provider_health["status"],
+        "service": "mana-llm",
+        "version": "0.1.0",
+        "providers": provider_health["providers"],
+    }
+
+
+# Metrics endpoint
+@app.get("/metrics")
+async def metrics() -> Response:
+    """Prometheus metrics endpoint."""
+    return Response(content=get_metrics(), media_type="text/plain")
+
+
+# Models endpoints
+@app.get("/v1/models", response_model=ModelsResponse)
+async def list_models() -> ModelsResponse:
+    """List all available models from all providers."""
+    if router is None:
+        raise HTTPException(status_code=503, detail="Service not ready")
+
+    models = await router.list_models()
+    return ModelsResponse(data=models)
+
+
+@app.get("/v1/models/{model_id:path}")
+async def get_model(model_id: str) -> ModelInfo:
+    """Get specific model information."""
+    if router is None:
+        raise HTTPException(status_code=503, detail="Service not ready")
+
+    model = await router.get_model(model_id)
+    if model is None:
+        raise HTTPException(status_code=404, detail=f"Model '{model_id}' not found")
+
+    return model
+
+
+# Chat completions endpoint
+@app.post("/v1/chat/completions")
+async def chat_completions(
+    request: ChatCompletionRequest,
+    http_request: Request,
+) -> ChatCompletionResponse | EventSourceResponse:
+    """
+    Create a chat completion.
+
+    Supports both streaming (SSE) and non-streaming responses based on the
+    `stream` parameter in the request body.
+    """
+    if router is None:
+        raise HTTPException(status_code=503, detail="Service not ready")
+
+    # Parse provider and model for metrics
+    model_parts = request.model.split("/", 1)
+    provider = model_parts[0] if len(model_parts) > 1 else "ollama"
+    model = model_parts[1] if len(model_parts) > 1 else request.model
+
+    start_time = time.time()
+
+    try:
+        if request.stream:
+            # Streaming response via SSE
+            logger.info(f"Streaming chat completion: {request.model}")
+
+            async def generate():
+                async for chunk in stream_chat_completion(router, request):
+                    yield chunk
+
+            record_llm_request(provider, model, streaming=True)
+
+            return EventSourceResponse(
+                generate(),
+                media_type="text/event-stream",
+            )
+        else:
+            # Non-streaming response
+            logger.info(f"Chat completion: {request.model}")
+            response = await router.chat_completion(request)
+
+            # Record metrics
+            latency = time.time() - start_time
+            record_llm_request(
+                provider=provider,
+                model=model,
+                streaming=False,
+                prompt_tokens=response.usage.prompt_tokens,
+                completion_tokens=response.usage.completion_tokens,
+                latency=latency,
+            )
+
+            return response
+
+    except ValueError as e:
+        logger.error(f"Invalid request: {e}")
+        record_llm_error(provider, model, "invalid_request")
+        raise HTTPException(status_code=400, detail=str(e))
+    except Exception as e:
+        logger.error(f"Chat completion failed: {e}")
+        record_llm_error(provider, model, "server_error")
+        raise HTTPException(status_code=500, detail=str(e))
+
+
+# Embeddings endpoint
+@app.post("/v1/embeddings", response_model=EmbeddingResponse)
+async def create_embeddings(request: EmbeddingRequest) -> EmbeddingResponse:
+    """Create embeddings for the input text."""
+    if router is None:
+        raise HTTPException(status_code=503, detail="Service not ready")
+
+    # Parse provider and model for metrics
+    model_parts = request.model.split("/", 1)
+    provider = model_parts[0] if len(model_parts) > 1 else "ollama"
+    model = model_parts[1] if len(model_parts) > 1 else request.model
+
+    start_time = time.time()
+
+    try:
+        logger.info(f"Creating embeddings: {request.model}")
+        response = await router.embeddings(request)
+
+        latency = time.time() - start_time
+        record_llm_request(
+            provider=provider,
+            model=model,
+            streaming=False,
+            prompt_tokens=response.usage.prompt_tokens,
+            latency=latency,
+        )
+
+        return response
+
+    except ValueError as e:
+        logger.error(f"Invalid embedding request: {e}")
+        record_llm_error(provider, model, "invalid_request")
+        raise HTTPException(status_code=400, detail=str(e))
+    except Exception as e:
+        logger.error(f"Embeddings failed: {e}")
+        record_llm_error(provider, model, "server_error")
+        raise HTTPException(status_code=500, detail=str(e))
+
+
+if __name__ == "__main__":
+    import uvicorn
+
+    uvicorn.run(
+        "src.main:app",
+        host="0.0.0.0",
+        port=settings.port,
+        reload=True,
+        log_level=settings.log_level,
+    )
diff --git a/services/mana-llm/src/models/__init__.py b/services/mana-llm/src/models/__init__.py
new file mode 100644
index 000000000..bb038e64e
--- /dev/null
+++ b/services/mana-llm/src/models/__init__.py
@@ -0,0 +1,22 @@
+"""Pydantic models for OpenAI-compatible API."""
+
+from .requests import ChatCompletionRequest, EmbeddingRequest
+from .responses import (
+    ChatCompletionResponse,
+    ChatCompletionStreamResponse,
+    EmbeddingResponse,
+    ModelInfo,
+    ModelsResponse,
+    Usage,
+)
+
+__all__ = [
+    "ChatCompletionRequest",
+    "ChatCompletionResponse",
+    "ChatCompletionStreamResponse",
+    "EmbeddingRequest",
+    "EmbeddingResponse",
+    "ModelInfo",
+    "ModelsResponse",
+    "Usage",
+]
diff --git a/services/mana-llm/src/models/requests.py b/services/mana-llm/src/models/requests.py
new file mode 100644
index 000000000..38b06c3dc
--- /dev/null
+++ b/services/mana-llm/src/models/requests.py
@@ -0,0 +1,57 @@
+"""Request models for OpenAI-compatible API."""
+
+from typing import Literal
+
+from pydantic import BaseModel, Field
+
+
+class TextContent(BaseModel):
+    """Text content in a message."""
+
+    type: Literal["text"] = "text"
+    text: str
+
+
+class ImageUrl(BaseModel):
+    """Image URL reference."""
+
+    url: str  # Can be http(s):// or data:image/...;base64,...
+
+
+class ImageContent(BaseModel):
+    """Image content in a message."""
+
+    type: Literal["image_url"] = "image_url"
+    image_url: ImageUrl
+
+
+MessageContent = str | list[TextContent | ImageContent]
+
+
+class Message(BaseModel):
+    """A single message in the conversation."""
+
+    role: Literal["system", "user", "assistant"]
+    content: MessageContent
+
+
+class ChatCompletionRequest(BaseModel):
+    """Request body for chat completions endpoint."""
+
+    model: str = Field(..., description="Model identifier in format 'provider/model' or just 'model'")
+    messages: list[Message] = Field(..., min_length=1)
+    stream: bool = False
+    temperature: float | None = Field(default=None, ge=0.0, le=2.0)
+    max_tokens: int | None = Field(default=None, gt=0)
+    top_p: float | None = Field(default=None, ge=0.0, le=1.0)
+    frequency_penalty: float | None = Field(default=None, ge=-2.0, le=2.0)
+    presence_penalty: float | None = Field(default=None, ge=-2.0, le=2.0)
+    stop: str | list[str] | None = None
+
+
+class EmbeddingRequest(BaseModel):
+    """Request body for embeddings endpoint."""
+
+    model: str = Field(..., description="Model identifier")
+    input: str | list[str] = Field(..., description="Text(s) to embed")
+    encoding_format: Literal["float", "base64"] = "float"
diff --git a/services/mana-llm/src/models/responses.py b/services/mana-llm/src/models/responses.py
new file mode 100644
index 000000000..44a545d24
--- /dev/null
+++ b/services/mana-llm/src/models/responses.py
@@ -0,0 +1,99 @@
+"""Response models for OpenAI-compatible API."""
+
+import time
+import uuid
+from typing import Literal
+
+from pydantic import BaseModel, Field
+
+
+class Usage(BaseModel):
+    """Token usage information."""
+
+    prompt_tokens: int = 0
+    completion_tokens: int = 0
+    total_tokens: int = 0
+
+
+class MessageResponse(BaseModel):
+    """Response message from the model."""
+
+    role: Literal["assistant"] = "assistant"
+    content: str
+
+
+class Choice(BaseModel):
+    """A single completion choice."""
+
+    index: int = 0
+    message: MessageResponse
+    finish_reason: Literal["stop", "length", "content_filter"] | None = "stop"
+
+
+class ChatCompletionResponse(BaseModel):
+    """Response from chat completions endpoint (non-streaming)."""
+
+    id: str = Field(default_factory=lambda: f"chatcmpl-{uuid.uuid4().hex[:12]}")
+    object: Literal["chat.completion"] = "chat.completion"
+    created: int = Field(default_factory=lambda: int(time.time()))
+    model: str
+    choices: list[Choice]
+    usage: Usage = Field(default_factory=Usage)
+
+
+class DeltaContent(BaseModel):
+    """Delta content for streaming responses."""
+
+    role: Literal["assistant"] | None = None
+    content: str | None = None
+
+
+class StreamChoice(BaseModel):
+    """A single streaming choice."""
+
+    index: int = 0
+    delta: DeltaContent
+    finish_reason: Literal["stop", "length", "content_filter"] | None = None
+
+
+class ChatCompletionStreamResponse(BaseModel):
+    """Response chunk from chat completions endpoint (streaming)."""
+
+    id: str = Field(default_factory=lambda: f"chatcmpl-{uuid.uuid4().hex[:12]}")
+    object: Literal["chat.completion.chunk"] = "chat.completion.chunk"
+    created: int = Field(default_factory=lambda: int(time.time()))
+    model: str
+    choices: list[StreamChoice]
+
+
+class ModelInfo(BaseModel):
+    """Information about a model."""
+
+    id: str
+    object: Literal["model"] = "model"
+    created: int = Field(default_factory=lambda: int(time.time()))
+    owned_by: str = "mana-llm"
+
+
+class ModelsResponse(BaseModel):
+    """Response from models endpoint."""
+
+    object: Literal["list"] = "list"
+    data: list[ModelInfo]
+
+
+class EmbeddingData(BaseModel):
+    """A single embedding result."""
+
+    object: Literal["embedding"] = "embedding"
+    index: int = 0
+    embedding: list[float]
+
+
+class EmbeddingResponse(BaseModel):
+    """Response from embeddings endpoint."""
+
+    object: Literal["list"] = "list"
+    data: list[EmbeddingData]
+    model: str
+    usage: Usage = Field(default_factory=Usage)
diff --git a/services/mana-llm/src/providers/__init__.py b/services/mana-llm/src/providers/__init__.py
new file mode 100644
index 000000000..04127d67e
--- /dev/null
+++ b/services/mana-llm/src/providers/__init__.py
@@ -0,0 +1,13 @@
+"""LLM Provider implementations."""
+
+from .base import LLMProvider
+from .ollama import OllamaProvider
+from .openai_compat import OpenAICompatProvider
+from .router import ProviderRouter
+
+__all__ = [
+    "LLMProvider",
+    "OllamaProvider",
+    "OpenAICompatProvider",
+    "ProviderRouter",
+]
diff --git a/services/mana-llm/src/providers/base.py b/services/mana-llm/src/providers/base.py
new file mode 100644
index 000000000..6f163bbac
--- /dev/null
+++ b/services/mana-llm/src/providers/base.py
@@ -0,0 +1,61 @@
+"""Abstract base class for LLM providers."""
+
+from abc import ABC, abstractmethod
+from collections.abc import AsyncIterator
+from typing import Any
+
+from src.models import (
+    ChatCompletionRequest,
+    ChatCompletionResponse,
+    ChatCompletionStreamResponse,
+    EmbeddingRequest,
+    EmbeddingResponse,
+    ModelInfo,
+)
+
+
+class LLMProvider(ABC):
+    """Abstract base class for LLM providers."""
+
+    name: str = "base"
+
+    @abstractmethod
+    async def chat_completion(
+        self,
+        request: ChatCompletionRequest,
+        model: str,
+    ) -> ChatCompletionResponse:
+        """Generate a chat completion (non-streaming)."""
+        ...
+
+    @abstractmethod
+    async def chat_completion_stream(
+        self,
+        request: ChatCompletionRequest,
+        model: str,
+    ) -> AsyncIterator[ChatCompletionStreamResponse]:
+        """Generate a chat completion (streaming)."""
+        ...
+
+    @abstractmethod
+    async def list_models(self) -> list[ModelInfo]:
+        """List available models."""
+        ...
+
+    @abstractmethod
+    async def embeddings(
+        self,
+        request: EmbeddingRequest,
+        model: str,
+    ) -> EmbeddingResponse:
+        """Generate embeddings for input text."""
+        ...
+
+    @abstractmethod
+    async def health_check(self) -> dict[str, Any]:
+        """Check provider health status."""
+        ...
+
+    async def close(self) -> None:
+        """Clean up resources."""
+        pass
diff --git a/services/mana-llm/src/providers/ollama.py b/services/mana-llm/src/providers/ollama.py
new file mode 100644
index 000000000..0a613fe92
--- /dev/null
+++ b/services/mana-llm/src/providers/ollama.py
@@ -0,0 +1,289 @@
+"""Ollama provider implementation."""
+
+import json
+import logging
+from collections.abc import AsyncIterator
+from typing import Any
+
+import httpx
+
+from src.config import settings
+from src.models import (
+    ChatCompletionRequest,
+    ChatCompletionResponse,
+    ChatCompletionStreamResponse,
+    Choice,
+    DeltaContent,
+    EmbeddingData,
+    EmbeddingRequest,
+    EmbeddingResponse,
+    MessageResponse,
+    ModelInfo,
+    StreamChoice,
+    Usage,
+)
+
+from .base import LLMProvider
+
+logger = logging.getLogger(__name__)
+
+
+class OllamaProvider(LLMProvider):
+    """Ollama LLM provider."""
+
+    name = "ollama"
+
+    def __init__(self, base_url: str | None = None, timeout: int | None = None):
+        self.base_url = (base_url or settings.ollama_url).rstrip("/")
+        self.timeout = timeout or settings.ollama_timeout
+        self._client: httpx.AsyncClient | None = None
+
+    @property
+    def client(self) -> httpx.AsyncClient:
+        """Get or create HTTP client."""
+        if self._client is None or self._client.is_closed:
+            self._client = httpx.AsyncClient(
+                base_url=self.base_url,
+                timeout=httpx.Timeout(self.timeout),
+            )
+        return self._client
+
+    def _convert_messages(self, request: ChatCompletionRequest) -> list[dict[str, Any]]:
+        """Convert OpenAI message format to Ollama format."""
+        messages = []
+        for msg in request.messages:
+            if isinstance(msg.content, str):
+                messages.append({"role": msg.role, "content": msg.content})
+            else:
+                # Handle multimodal content (vision)
+                text_parts = []
+                images = []
+                for part in msg.content:
+                    if part.type == "text":
+                        text_parts.append(part.text)
+                    elif part.type == "image_url":
+                        url = part.image_url.url
+                        # Extract base64 data from data URL
+                        if url.startswith("data:"):
+                            # Format: data:image/png;base64,<base64_data>
+                            base64_data = url.split(",", 1)[1] if "," in url else url
+                            images.append(base64_data)
+                        else:
+                            # HTTP URL - Ollama expects base64, so we'd need to fetch
+                            # For now, log warning and skip
+                            logger.warning(f"HTTP image URLs not supported, skipping: {url[:50]}...")
+
+                message_data: dict[str, Any] = {
+                    "role": msg.role,
+                    "content": " ".join(text_parts),
+                }
+                if images:
+                    message_data["images"] = images
+                messages.append(message_data)
+        return messages
+
+    async def chat_completion(
+        self,
+        request: ChatCompletionRequest,
+        model: str,
+    ) -> ChatCompletionResponse:
+        """Generate a chat completion (non-streaming)."""
+        payload: dict[str, Any] = {
+            "model": model,
+            "messages": self._convert_messages(request),
+            "stream": False,
+        }
+
+        # Add optional parameters
+        options: dict[str, Any] = {}
+        if request.temperature is not None:
+            options["temperature"] = request.temperature
+        if request.top_p is not None:
+            options["top_p"] = request.top_p
+        if request.max_tokens is not None:
+            options["num_predict"] = request.max_tokens
+        if request.stop:
+            options["stop"] = request.stop if isinstance(request.stop, list) else [request.stop]
+
+        if options:
+            payload["options"] = options
+
+        logger.debug(f"Ollama request: {model}, messages: {len(request.messages)}")
+
+        response = await self.client.post("/api/chat", json=payload)
+        response.raise_for_status()
+        data = response.json()
+
+        return ChatCompletionResponse(
+            model=f"ollama/{model}",
+            choices=[
+                Choice(
+                    message=MessageResponse(content=data["message"]["content"]),
+                    finish_reason="stop" if data.get("done") else None,
+                )
+            ],
+            usage=Usage(
+                prompt_tokens=data.get("prompt_eval_count", 0),
+                completion_tokens=data.get("eval_count", 0),
+                total_tokens=data.get("prompt_eval_count", 0) + data.get("eval_count", 0),
+            ),
+        )
+
+    async def chat_completion_stream(
+        self,
+        request: ChatCompletionRequest,
+        model: str,
+    ) -> AsyncIterator[ChatCompletionStreamResponse]:
+        """Generate a chat completion (streaming)."""
+        payload: dict[str, Any] = {
+            "model": model,
+            "messages": self._convert_messages(request),
+            "stream": True,
+        }
+
+        # Add optional parameters
+        options: dict[str, Any] = {}
+        if request.temperature is not None:
+            options["temperature"] = request.temperature
+        if request.top_p is not None:
+            options["top_p"] = request.top_p
+        if request.max_tokens is not None:
+            options["num_predict"] = request.max_tokens
+        if request.stop:
+            options["stop"] = request.stop if isinstance(request.stop, list) else [request.stop]
+
+        if options:
+            payload["options"] = options
+
+        logger.debug(f"Ollama streaming request: {model}")
+
+        response_id = f"chatcmpl-{model[:8]}"
+        first_chunk = True
+
+        async with self.client.stream("POST", "/api/chat", json=payload) as response:
+            response.raise_for_status()
+            async for line in response.aiter_lines():
+                if not line:
+                    continue
+
+                try:
+                    data = json.loads(line)
+                except json.JSONDecodeError:
+                    logger.warning(f"Failed to parse Ollama response line: {line}")
+                    continue
+
+                # First chunk includes role
+                if first_chunk:
+                    yield ChatCompletionStreamResponse(
+                        id=response_id,
+                        model=f"ollama/{model}",
+                        choices=[
+                            StreamChoice(
+                                delta=DeltaContent(role="assistant"),
+                            )
+                        ],
+                    )
+                    first_chunk = False
+
+                # Content chunks
+                content = data.get("message", {}).get("content", "")
+                if content:
+                    yield ChatCompletionStreamResponse(
+                        id=response_id,
+                        model=f"ollama/{model}",
+                        choices=[
+                            StreamChoice(
+                                delta=DeltaContent(content=content),
+                            )
+                        ],
+                    )
+
+                # Final chunk with finish_reason
+                if data.get("done"):
+                    yield ChatCompletionStreamResponse(
+                        id=response_id,
+                        model=f"ollama/{model}",
+                        choices=[
+                            StreamChoice(
+                                delta=DeltaContent(),
+                                finish_reason="stop",
+                            )
+                        ],
+                    )
+
+    async def list_models(self) -> list[ModelInfo]:
+        """List available Ollama models."""
+        response = await self.client.get("/api/tags")
+        response.raise_for_status()
+        data = response.json()
+
+        models = []
+        for model_data in data.get("models", []):
+            name = model_data.get("name", "")
+            models.append(
+                ModelInfo(
+                    id=f"ollama/{name}",
+                    owned_by="ollama",
+                    created=int(model_data.get("modified_at", 0)) or None,
+                )
+            )
+        return models
+
+    async def embeddings(
+        self,
+        request: EmbeddingRequest,
+        model: str,
+    ) -> EmbeddingResponse:
+        """Generate embeddings for input text."""
+        inputs = request.input if isinstance(request.input, list) else [request.input]
+        embeddings_data = []
+
+        for i, text in enumerate(inputs):
+            response = await self.client.post(
+                "/api/embeddings",
+                json={"model": model, "prompt": text},
+            )
+            response.raise_for_status()
+            data = response.json()
+
+            embeddings_data.append(
+                EmbeddingData(
+                    index=i,
+                    embedding=data.get("embedding", []),
+                )
+            )
+
+        return EmbeddingResponse(
+            data=embeddings_data,
+            model=f"ollama/{model}",
+            usage=Usage(
+                prompt_tokens=sum(len(text.split()) for text in inputs),  # Approximate
+                total_tokens=sum(len(text.split()) for text in inputs),
+            ),
+        )
+
+    async def health_check(self) -> dict[str, Any]:
+        """Check Ollama health status."""
+        try:
+            response = await self.client.get("/api/tags")
+            response.raise_for_status()
+            data = response.json()
+            model_count = len(data.get("models", []))
+            return {
+                "status": "healthy",
+                "provider": self.name,
+                "url": self.base_url,
+                "models_available": model_count,
+            }
+        except Exception as e:
+            return {
+                "status": "unhealthy",
+                "provider": self.name,
+                "url": self.base_url,
+                "error": str(e),
+            }
+
+    async def close(self) -> None:
+        """Close HTTP client."""
+        if self._client and not self._client.is_closed:
+            await self._client.aclose()
diff --git a/services/mana-llm/src/providers/openai_compat.py b/services/mana-llm/src/providers/openai_compat.py
new file mode 100644
index 000000000..e5565757e
--- /dev/null
+++ b/services/mana-llm/src/providers/openai_compat.py
@@ -0,0 +1,274 @@
+"""OpenAI-compatible provider for OpenRouter, Groq, Together, etc."""
+
+import json
+import logging
+from collections.abc import AsyncIterator
+from typing import Any
+
+import httpx
+
+from src.models import (
+    ChatCompletionRequest,
+    ChatCompletionResponse,
+    ChatCompletionStreamResponse,
+    Choice,
+    DeltaContent,
+    EmbeddingData,
+    EmbeddingRequest,
+    EmbeddingResponse,
+    MessageResponse,
+    ModelInfo,
+    StreamChoice,
+    Usage,
+)
+
+from .base import LLMProvider
+
+logger = logging.getLogger(__name__)
+
+
+class OpenAICompatProvider(LLMProvider):
+    """OpenAI-compatible API provider (OpenRouter, Groq, Together, etc.)."""
+
+    def __init__(
+        self,
+        name: str,
+        base_url: str,
+        api_key: str,
+        default_model: str | None = None,
+        timeout: int = 120,
+    ):
+        self.name = name
+        self.base_url = base_url.rstrip("/")
+        self.api_key = api_key
+        self.default_model = default_model
+        self.timeout = timeout
+        self._client: httpx.AsyncClient | None = None
+
+    @property
+    def client(self) -> httpx.AsyncClient:
+        """Get or create HTTP client."""
+        if self._client is None or self._client.is_closed:
+            self._client = httpx.AsyncClient(
+                base_url=self.base_url,
+                timeout=httpx.Timeout(self.timeout),
+                headers={
+                    "Authorization": f"Bearer {self.api_key}",
+                    "Content-Type": "application/json",
+                },
+            )
+        return self._client
+
+    def _convert_messages(self, request: ChatCompletionRequest) -> list[dict[str, Any]]:
+        """Convert internal message format to OpenAI format."""
+        messages = []
+        for msg in request.messages:
+            if isinstance(msg.content, str):
+                messages.append({"role": msg.role, "content": msg.content})
+            else:
+                # Handle multimodal content
+                content_parts = []
+                for part in msg.content:
+                    if part.type == "text":
+                        content_parts.append({"type": "text", "text": part.text})
+                    elif part.type == "image_url":
+                        content_parts.append({
+                            "type": "image_url",
+                            "image_url": {"url": part.image_url.url},
+                        })
+                messages.append({"role": msg.role, "content": content_parts})
+        return messages
+
+    async def chat_completion(
+        self,
+        request: ChatCompletionRequest,
+        model: str,
+    ) -> ChatCompletionResponse:
+        """Generate a chat completion (non-streaming)."""
+        payload: dict[str, Any] = {
+            "model": model,
+            "messages": self._convert_messages(request),
+            "stream": False,
+        }
+
+        # Add optional parameters
+        if request.temperature is not None:
+            payload["temperature"] = request.temperature
+        if request.max_tokens is not None:
+            payload["max_tokens"] = request.max_tokens
+        if request.top_p is not None:
+            payload["top_p"] = request.top_p
+        if request.frequency_penalty is not None:
+            payload["frequency_penalty"] = request.frequency_penalty
+        if request.presence_penalty is not None:
+            payload["presence_penalty"] = request.presence_penalty
+        if request.stop:
+            payload["stop"] = request.stop
+
+        logger.debug(f"{self.name} request: {model}, messages: {len(request.messages)}")
+
+        response = await self.client.post("/chat/completions", json=payload)
+        response.raise_for_status()
+        data = response.json()
+
+        return ChatCompletionResponse(
+            id=data.get("id", ""),
+            model=f"{self.name}/{model}",
+            choices=[
+                Choice(
+                    index=choice.get("index", 0),
+                    message=MessageResponse(content=choice["message"]["content"]),
+                    finish_reason=choice.get("finish_reason", "stop"),
+                )
+                for choice in data.get("choices", [])
+            ],
+            usage=Usage(
+                prompt_tokens=data.get("usage", {}).get("prompt_tokens", 0),
+                completion_tokens=data.get("usage", {}).get("completion_tokens", 0),
+                total_tokens=data.get("usage", {}).get("total_tokens", 0),
+            ),
+        )
+
+    async def chat_completion_stream(
+        self,
+        request: ChatCompletionRequest,
+        model: str,
+    ) -> AsyncIterator[ChatCompletionStreamResponse]:
+        """Generate a chat completion (streaming)."""
+        payload: dict[str, Any] = {
+            "model": model,
+            "messages": self._convert_messages(request),
+            "stream": True,
+        }
+
+        # Add optional parameters
+        if request.temperature is not None:
+            payload["temperature"] = request.temperature
+        if request.max_tokens is not None:
+            payload["max_tokens"] = request.max_tokens
+        if request.top_p is not None:
+            payload["top_p"] = request.top_p
+        if request.frequency_penalty is not None:
+            payload["frequency_penalty"] = request.frequency_penalty
+        if request.presence_penalty is not None:
+            payload["presence_penalty"] = request.presence_penalty
+        if request.stop:
+            payload["stop"] = request.stop
+
+        logger.debug(f"{self.name} streaming request: {model}")
+
+        async with self.client.stream("POST", "/chat/completions", json=payload) as response:
+            response.raise_for_status()
+            async for line in response.aiter_lines():
+                if not line or not line.startswith("data: "):
+                    continue
+
+                data_str = line[6:]  # Remove "data: " prefix
+
+                if data_str == "[DONE]":
+                    break
+
+                try:
+                    data = json.loads(data_str)
+                except json.JSONDecodeError:
+                    logger.warning(f"Failed to parse stream line: {data_str}")
+                    continue
+
+                choices = data.get("choices", [])
+                if not choices:
+                    continue
+
+                choice = choices[0]
+                delta = choice.get("delta", {})
+
+                yield ChatCompletionStreamResponse(
+                    id=data.get("id", ""),
+                    model=f"{self.name}/{model}",
+                    choices=[
+                        StreamChoice(
+                            index=choice.get("index", 0),
+                            delta=DeltaContent(
+                                role=delta.get("role"),
+                                content=delta.get("content"),
+                            ),
+                            finish_reason=choice.get("finish_reason"),
+                        )
+                    ],
+                )
+
+    async def list_models(self) -> list[ModelInfo]:
+        """List available models."""
+        try:
+            response = await self.client.get("/models")
+            response.raise_for_status()
+            data = response.json()
+
+            models = []
+            for model_data in data.get("data", []):
+                model_id = model_data.get("id", "")
+                models.append(
+                    ModelInfo(
+                        id=f"{self.name}/{model_id}",
+                        owned_by=model_data.get("owned_by", self.name),
+                    )
+                )
+            return models
+        except httpx.HTTPError as e:
+            logger.warning(f"Failed to list models from {self.name}: {e}")
+            return []
+
+    async def embeddings(
+        self,
+        request: EmbeddingRequest,
+        model: str,
+    ) -> EmbeddingResponse:
+        """Generate embeddings for input text."""
+        payload = {
+            "model": model,
+            "input": request.input,
+        }
+
+        response = await self.client.post("/embeddings", json=payload)
+        response.raise_for_status()
+        data = response.json()
+
+        return EmbeddingResponse(
+            data=[
+                EmbeddingData(
+                    index=item.get("index", i),
+                    embedding=item.get("embedding", []),
+                )
+                for i, item in enumerate(data.get("data", []))
+            ],
+            model=f"{self.name}/{model}",
+            usage=Usage(
+                prompt_tokens=data.get("usage", {}).get("prompt_tokens", 0),
+                total_tokens=data.get("usage", {}).get("total_tokens", 0),
+            ),
+        )
+
+    async def health_check(self) -> dict[str, Any]:
+        """Check provider health status."""
+        try:
+            response = await self.client.get("/models")
+            response.raise_for_status()
+            data = response.json()
+            model_count = len(data.get("data", []))
+            return {
+                "status": "healthy",
+                "provider": self.name,
+                "url": self.base_url,
+                "models_available": model_count,
+            }
+        except Exception as e:
+            return {
+                "status": "unhealthy",
+                "provider": self.name,
+                "url": self.base_url,
+                "error": str(e),
+            }
+
+    async def close(self) -> None:
+        """Close HTTP client."""
+        if self._client and not self._client.is_closed:
+            await self._client.aclose()
diff --git a/services/mana-llm/src/providers/router.py b/services/mana-llm/src/providers/router.py
new file mode 100644
index 000000000..940f80626
--- /dev/null
+++ b/services/mana-llm/src/providers/router.py
@@ -0,0 +1,186 @@
+"""Provider routing logic for mana-llm."""
+
+import logging
+from collections.abc import AsyncIterator
+from typing import Any
+
+from src.config import settings
+from src.models import (
+    ChatCompletionRequest,
+    ChatCompletionResponse,
+    ChatCompletionStreamResponse,
+    EmbeddingRequest,
+    EmbeddingResponse,
+    ModelInfo,
+)
+
+from .base import LLMProvider
+from .ollama import OllamaProvider
+from .openai_compat import OpenAICompatProvider
+
+logger = logging.getLogger(__name__)
+
+
+class ProviderRouter:
+    """Routes requests to appropriate LLM providers based on model prefix."""
+
+    def __init__(self):
+        self.providers: dict[str, LLMProvider] = {}
+        self._initialize_providers()
+
+    def _initialize_providers(self) -> None:
+        """Initialize available providers based on configuration."""
+        # Ollama is always available (local)
+        self.providers["ollama"] = OllamaProvider()
+        logger.info(f"Initialized Ollama provider at {settings.ollama_url}")
+
+        # OpenRouter (if API key configured)
+        if settings.openrouter_api_key:
+            self.providers["openrouter"] = OpenAICompatProvider(
+                name="openrouter",
+                base_url=settings.openrouter_base_url,
+                api_key=settings.openrouter_api_key,
+                default_model=settings.openrouter_default_model,
+            )
+            logger.info("Initialized OpenRouter provider")
+
+        # Groq (if API key configured)
+        if settings.groq_api_key:
+            self.providers["groq"] = OpenAICompatProvider(
+                name="groq",
+                base_url=settings.groq_base_url,
+                api_key=settings.groq_api_key,
+            )
+            logger.info("Initialized Groq provider")
+
+        # Together (if API key configured)
+        if settings.together_api_key:
+            self.providers["together"] = OpenAICompatProvider(
+                name="together",
+                base_url=settings.together_base_url,
+                api_key=settings.together_api_key,
+            )
+            logger.info("Initialized Together provider")
+
+    def _parse_model(self, model: str) -> tuple[str, str]:
+        """
+        Parse model string into (provider, model_name).
+
+        Format: "provider/model" or just "model" (defaults to ollama)
+        """
+        if "/" in model:
+            parts = model.split("/", 1)
+            provider = parts[0].lower()
+            model_name = parts[1]
+        else:
+            # Default to Ollama
+            provider = "ollama"
+            model_name = model
+
+        return provider, model_name
+
+    def _get_provider(self, provider_name: str) -> LLMProvider:
+        """Get provider by name, raise if not available."""
+        if provider_name not in self.providers:
+            available = list(self.providers.keys())
+            raise ValueError(
+                f"Provider '{provider_name}' not available. "
+                f"Available providers: {available}"
+            )
+        return self.providers[provider_name]
+
+    async def chat_completion(
+        self,
+        request: ChatCompletionRequest,
+    ) -> ChatCompletionResponse:
+        """Route chat completion request to appropriate provider."""
+        provider_name, model_name = self._parse_model(request.model)
+        provider = self._get_provider(provider_name)
+
+        logger.info(f"Routing chat completion to {provider_name}/{model_name}")
+
+        try:
+            return await provider.chat_completion(request, model_name)
+        except Exception as e:
+            logger.error(f"Chat completion failed on {provider_name}: {e}")
+            # Could implement fallback logic here
+            raise
+
+    async def chat_completion_stream(
+        self,
+        request: ChatCompletionRequest,
+    ) -> AsyncIterator[ChatCompletionStreamResponse]:
+        """Route streaming chat completion request to appropriate provider."""
+        provider_name, model_name = self._parse_model(request.model)
+        provider = self._get_provider(provider_name)
+
+        logger.info(f"Routing streaming chat completion to {provider_name}/{model_name}")
+
+        try:
+            async for chunk in provider.chat_completion_stream(request, model_name):
+                yield chunk
+        except Exception as e:
+            logger.error(f"Streaming chat completion failed on {provider_name}: {e}")
+            raise
+
+    async def embeddings(
+        self,
+        request: EmbeddingRequest,
+    ) -> EmbeddingResponse:
+        """Route embeddings request to appropriate provider."""
+        provider_name, model_name = self._parse_model(request.model)
+        provider = self._get_provider(provider_name)
+
+        logger.info(f"Routing embeddings to {provider_name}/{model_name}")
+
+        return await provider.embeddings(request, model_name)
+
+    async def list_models(self) -> list[ModelInfo]:
+        """List all available models from all providers."""
+        all_models: list[ModelInfo] = []
+
+        for provider in self.providers.values():
+            try:
+                models = await provider.list_models()
+                all_models.extend(models)
+            except Exception as e:
+                logger.warning(f"Failed to list models from {provider.name}: {e}")
+
+        return all_models
+
+    async def get_model(self, model_id: str) -> ModelInfo | None:
+        """Get specific model info."""
+        provider_name, model_name = self._parse_model(model_id)
+
+        if provider_name not in self.providers:
+            return None
+
+        provider = self.providers[provider_name]
+        models = await provider.list_models()
+
+        for model in models:
+            if model.id == model_id or model.id.endswith(f"/{model_name}"):
+                return model
+
+        return None
+
+    async def health_check(self) -> dict[str, Any]:
+        """Check health of all providers."""
+        results: dict[str, Any] = {}
+
+        for name, provider in self.providers.items():
+            results[name] = await provider.health_check()
+
+        # Overall status
+        all_healthy = all(r.get("status") == "healthy" for r in results.values())
+        any_healthy = any(r.get("status") == "healthy" for r in results.values())
+
+        return {
+            "status": "healthy" if all_healthy else ("degraded" if any_healthy else "unhealthy"),
+            "providers": results,
+        }
+
+    async def close(self) -> None:
+        """Close all providers."""
+        for provider in self.providers.values():
+            await provider.close()
diff --git a/services/mana-llm/src/streaming/__init__.py b/services/mana-llm/src/streaming/__init__.py
new file mode 100644
index 000000000..abc609671
--- /dev/null
+++ b/services/mana-llm/src/streaming/__init__.py
@@ -0,0 +1,5 @@
+"""Streaming utilities for SSE responses."""
+
+from .sse import stream_chat_completion
+
+__all__ = ["stream_chat_completion"]
diff --git a/services/mana-llm/src/streaming/sse.py b/services/mana-llm/src/streaming/sse.py
new file mode 100644
index 000000000..f0a9b59e3
--- /dev/null
+++ b/services/mana-llm/src/streaming/sse.py
@@ -0,0 +1,43 @@
+"""Server-Sent Events (SSE) response handling."""
+
+import json
+import logging
+from collections.abc import AsyncIterator
+
+from src.models import ChatCompletionRequest, ChatCompletionStreamResponse
+from src.providers import ProviderRouter
+
+logger = logging.getLogger(__name__)
+
+
+async def stream_chat_completion(
+    router: ProviderRouter,
+    request: ChatCompletionRequest,
+) -> AsyncIterator[str]:
+    """
+    Stream chat completion responses as SSE data lines.
+
+    Yields strings in SSE format:
+        data: {"choices":[{"delta":{"content":"Hello"}}]}
+        data: [DONE]
+    """
+    try:
+        async for chunk in router.chat_completion_stream(request):
+            # Convert to OpenAI-compatible SSE format
+            data = chunk.model_dump(exclude_none=True)
+            yield f"data: {json.dumps(data)}\n\n"
+
+        # Send final [DONE] marker
+        yield "data: [DONE]\n\n"
+
+    except Exception as e:
+        logger.error(f"Streaming error: {e}")
+        # Send error as SSE event
+        error_data = {
+            "error": {
+                "message": str(e),
+                "type": "server_error",
+            }
+        }
+        yield f"data: {json.dumps(error_data)}\n\n"
+        yield "data: [DONE]\n\n"
diff --git a/services/mana-llm/src/utils/__init__.py b/services/mana-llm/src/utils/__init__.py
new file mode 100644
index 000000000..a2f2d361b
--- /dev/null
+++ b/services/mana-llm/src/utils/__init__.py
@@ -0,0 +1,5 @@
+"""Utility modules."""
+
+from .metrics import get_metrics, metrics_middleware
+
+__all__ = ["get_metrics", "metrics_middleware"]
diff --git a/services/mana-llm/src/utils/cache.py b/services/mana-llm/src/utils/cache.py
new file mode 100644
index 000000000..7427ec8c3
--- /dev/null
+++ b/services/mana-llm/src/utils/cache.py
@@ -0,0 +1,85 @@
+"""Redis caching utilities (optional)."""
+
+import hashlib
+import json
+import logging
+from typing import Any
+
+from src.config import settings
+
+logger = logging.getLogger(__name__)
+
+# Redis client (lazy initialized)
+_redis_client = None
+
+
+async def get_redis_client():
+    """Get or create Redis client."""
+    global _redis_client
+
+    if _redis_client is not None:
+        return _redis_client
+
+    if not settings.redis_url:
+        return None
+
+    try:
+        import redis.asyncio as redis
+
+        _redis_client = redis.from_url(settings.redis_url)
+        # Test connection
+        await _redis_client.ping()
+        logger.info(f"Connected to Redis at {settings.redis_url}")
+        return _redis_client
+    except Exception as e:
+        logger.warning(f"Failed to connect to Redis: {e}")
+        return None
+
+
+def generate_cache_key(prefix: str, data: dict[str, Any]) -> str:
+    """Generate a cache key from request data."""
+    # Serialize and hash the data for consistent key
+    serialized = json.dumps(data, sort_keys=True)
+    hash_value = hashlib.sha256(serialized.encode()).hexdigest()[:16]
+    return f"mana-llm:{prefix}:{hash_value}"
+
+
+async def get_cached(key: str) -> dict[str, Any] | None:
+    """Get cached value by key."""
+    client = await get_redis_client()
+    if client is None:
+        return None
+
+    try:
+        value = await client.get(key)
+        if value:
+            return json.loads(value)
+    except Exception as e:
+        logger.warning(f"Cache get failed: {e}")
+
+    return None
+
+
+async def set_cached(key: str, value: dict[str, Any], ttl: int | None = None) -> bool:
+    """Set cached value with optional TTL."""
+    client = await get_redis_client()
+    if client is None:
+        return False
+
+    try:
+        ttl = ttl or settings.cache_ttl
+        serialized = json.dumps(value)
+        await client.setex(key, ttl, serialized)
+        return True
+    except Exception as e:
+        logger.warning(f"Cache set failed: {e}")
+        return False
+
+
+async def close_redis() -> None:
+    """Close Redis connection."""
+    global _redis_client
+
+    if _redis_client is not None:
+        await _redis_client.aclose()
+        _redis_client = None
diff --git a/services/mana-llm/src/utils/metrics.py b/services/mana-llm/src/utils/metrics.py
new file mode 100644
index 000000000..87d4096a5
--- /dev/null
+++ b/services/mana-llm/src/utils/metrics.py
@@ -0,0 +1,109 @@
+"""Prometheus metrics for mana-llm."""
+
+import time
+from collections.abc import Callable
+
+from fastapi import Request, Response
+from prometheus_client import Counter, Histogram, generate_latest
+from starlette.middleware.base import BaseHTTPMiddleware
+
+# Request metrics
+REQUEST_COUNT = Counter(
+    "mana_llm_requests_total",
+    "Total number of requests",
+    ["method", "endpoint", "status"],
+)
+
+REQUEST_LATENCY = Histogram(
+    "mana_llm_request_latency_seconds",
+    "Request latency in seconds",
+    ["method", "endpoint"],
+    buckets=[0.1, 0.5, 1.0, 2.0, 5.0, 10.0, 30.0, 60.0, 120.0],
+)
+
+# LLM-specific metrics
+LLM_REQUEST_COUNT = Counter(
+    "mana_llm_llm_requests_total",
+    "Total number of LLM requests",
+    ["provider", "model", "streaming"],
+)
+
+LLM_TOKEN_COUNT = Counter(
+    "mana_llm_tokens_total",
+    "Total tokens processed",
+    ["provider", "model", "type"],  # type: prompt, completion
+)
+
+LLM_LATENCY = Histogram(
+    "mana_llm_llm_latency_seconds",
+    "LLM request latency in seconds",
+    ["provider", "model"],
+    buckets=[0.5, 1.0, 2.0, 5.0, 10.0, 30.0, 60.0, 120.0],
+)
+
+LLM_ERRORS = Counter(
+    "mana_llm_llm_errors_total",
+    "Total LLM errors",
+    ["provider", "model", "error_type"],
+)
+
+
+def get_metrics() -> bytes:
+    """Generate Prometheus metrics output."""
+    return generate_latest()
+
+
+class MetricsMiddleware(BaseHTTPMiddleware):
+    """Middleware for collecting HTTP metrics."""
+
+    async def dispatch(self, request: Request, call_next: Callable) -> Response:
+        start_time = time.time()
+
+        response = await call_next(request)
+
+        # Record metrics
+        duration = time.time() - start_time
+        endpoint = request.url.path
+        method = request.method
+        status = str(response.status_code)
+
+        REQUEST_COUNT.labels(method=method, endpoint=endpoint, status=status).inc()
+        REQUEST_LATENCY.labels(method=method, endpoint=endpoint).observe(duration)
+
+        return response
+
+
+# Export middleware instance
+metrics_middleware = MetricsMiddleware
+
+
+def record_llm_request(
+    provider: str,
+    model: str,
+    streaming: bool,
+    prompt_tokens: int = 0,
+    completion_tokens: int = 0,
+    latency: float | None = None,
+) -> None:
+    """Record LLM request metrics."""
+    LLM_REQUEST_COUNT.labels(
+        provider=provider,
+        model=model,
+        streaming=str(streaming).lower(),
+    ).inc()
+
+    if prompt_tokens > 0:
+        LLM_TOKEN_COUNT.labels(provider=provider, model=model, type="prompt").inc(prompt_tokens)
+
+    if completion_tokens > 0:
+        LLM_TOKEN_COUNT.labels(provider=provider, model=model, type="completion").inc(
+            completion_tokens
+        )
+
+    if latency is not None:
+        LLM_LATENCY.labels(provider=provider, model=model).observe(latency)
+
+
+def record_llm_error(provider: str, model: str, error_type: str) -> None:
+    """Record LLM error metrics."""
+    LLM_ERRORS.labels(provider=provider, model=model, error_type=error_type).inc()
diff --git a/services/mana-llm/tests/__init__.py b/services/mana-llm/tests/__init__.py
new file mode 100644
index 000000000..a0a8deda8
--- /dev/null
+++ b/services/mana-llm/tests/__init__.py
@@ -0,0 +1 @@
+"""Tests for mana-llm service."""
diff --git a/services/mana-llm/tests/test_api.py b/services/mana-llm/tests/test_api.py
new file mode 100644
index 000000000..e6ea4f8b7
--- /dev/null
+++ b/services/mana-llm/tests/test_api.py
@@ -0,0 +1,41 @@
+"""API endpoint tests."""
+
+import pytest
+from fastapi.testclient import TestClient
+
+
+@pytest.fixture
+def client():
+    """Create test client."""
+    from src.main import app
+
+    with TestClient(app) as c:
+        yield c
+
+
+def test_health_endpoint(client):
+    """Test health check endpoint."""
+    response = client.get("/health")
+    assert response.status_code == 200
+    data = response.json()
+    assert "status" in data
+    assert "service" in data
+    assert data["service"] == "mana-llm"
+
+
+def test_metrics_endpoint(client):
+    """Test metrics endpoint."""
+    response = client.get("/metrics")
+    assert response.status_code == 200
+    assert "mana_llm" in response.text
+
+
+def test_list_models_endpoint(client):
+    """Test list models endpoint."""
+    response = client.get("/v1/models")
+    # May fail if Ollama is not running, but should return valid response structure
+    if response.status_code == 200:
+        data = response.json()
+        assert "data" in data
+        assert "object" in data
+        assert data["object"] == "list"
diff --git a/services/mana-llm/tests/test_providers.py b/services/mana-llm/tests/test_providers.py
new file mode 100644
index 000000000..b0f85cc70
--- /dev/null
+++ b/services/mana-llm/tests/test_providers.py
@@ -0,0 +1,113 @@
+"""Provider tests."""
+
+import pytest
+
+from src.models import ChatCompletionRequest, Message
+from src.providers import OllamaProvider, OpenAICompatProvider, ProviderRouter
+
+
+class TestProviderRouter:
+    """Test provider routing logic."""
+
+    def test_parse_model_with_provider(self):
+        """Test model parsing with provider prefix."""
+        router = ProviderRouter()
+
+        provider, model = router._parse_model("ollama/gemma3:4b")
+        assert provider == "ollama"
+        assert model == "gemma3:4b"
+
+    def test_parse_model_without_provider(self):
+        """Test model parsing without provider prefix (defaults to ollama)."""
+        router = ProviderRouter()
+
+        provider, model = router._parse_model("gemma3:4b")
+        assert provider == "ollama"
+        assert model == "gemma3:4b"
+
+    def test_parse_model_openrouter(self):
+        """Test model parsing for OpenRouter."""
+        router = ProviderRouter()
+
+        provider, model = router._parse_model("openrouter/meta-llama/llama-3.1-8b-instruct")
+        assert provider == "openrouter"
+        assert model == "meta-llama/llama-3.1-8b-instruct"
+
+    def test_get_invalid_provider(self):
+        """Test getting invalid provider raises error."""
+        router = ProviderRouter()
+
+        with pytest.raises(ValueError, match="not available"):
+            router._get_provider("invalid_provider")
+
+
+class TestOllamaProvider:
+    """Test Ollama provider."""
+
+    def test_convert_simple_messages(self):
+        """Test converting simple text messages."""
+        provider = OllamaProvider()
+        request = ChatCompletionRequest(
+            model="gemma3:4b",
+            messages=[
+                Message(role="user", content="Hello"),
+            ],
+        )
+
+        messages = provider._convert_messages(request)
+        assert len(messages) == 1
+        assert messages[0]["role"] == "user"
+        assert messages[0]["content"] == "Hello"
+
+    def test_convert_multimodal_messages(self):
+        """Test converting multimodal messages."""
+        provider = OllamaProvider()
+        request = ChatCompletionRequest(
+            model="llava:7b",
+            messages=[
+                Message(
+                    role="user",
+                    content=[
+                        {"type": "text", "text": "What's in this image?"},
+                        {
+                            "type": "image_url",
+                            "image_url": {"url": "data:image/png;base64,iVBORw0KGgo="},
+                        },
+                    ],
+                ),
+            ],
+        )
+
+        messages = provider._convert_messages(request)
+        assert len(messages) == 1
+        assert messages[0]["role"] == "user"
+        assert messages[0]["content"] == "What's in this image?"
+        assert "images" in messages[0]
+        assert len(messages[0]["images"]) == 1
+
+
+class TestOpenAICompatProvider:
+    """Test OpenAI-compatible provider."""
+
+    def test_convert_simple_messages(self):
+        """Test converting simple text messages."""
+        provider = OpenAICompatProvider(
+            name="test",
+            base_url="http://localhost",
+            api_key="test-key",
+        )
+
+        request = ChatCompletionRequest(
+            model="test-model",
+            messages=[
+                Message(role="system", content="You are helpful."),
+                Message(role="user", content="Hello"),
+            ],
+        )
+
+        messages = provider._convert_messages(request)
+        assert len(messages) == 2
+        assert messages[0]["role"] == "system"
+        assert messages[0]["content"] == "You are helpful."
+        assert messages[1]["role"] == "user"
+        assert messages[1]["content"] == "Hello"
diff --git a/services/mana-llm/tests/test_streaming.py b/services/mana-llm/tests/test_streaming.py
new file mode 100644
index 000000000..4c97abe00
--- /dev/null
+++ b/services/mana-llm/tests/test_streaming.py
@@ -0,0 +1,57 @@
+"""Streaming tests."""
+
+import pytest
+
+from src.models import ChatCompletionStreamResponse, DeltaContent, StreamChoice
+
+
+class TestStreamingModels:
+    """Test streaming response models."""
+
+    def test_stream_response_serialization(self):
+        """Test streaming response serializes correctly."""
+        response = ChatCompletionStreamResponse(
+            id="test-id",
+            model="ollama/gemma3:4b",
+            choices=[
+                StreamChoice(
+                    delta=DeltaContent(content="Hello"),
+                )
+            ],
+        )
+
+        data = response.model_dump(exclude_none=True)
+        assert data["id"] == "test-id"
+        assert data["model"] == "ollama/gemma3:4b"
+        assert data["choices"][0]["delta"]["content"] == "Hello"
+
+    def test_stream_response_with_role(self):
+        """Test first chunk with role."""
+        response = ChatCompletionStreamResponse(
+            id="test-id",
+            model="ollama/gemma3:4b",
+            choices=[
+                StreamChoice(
+                    delta=DeltaContent(role="assistant"),
+                )
+            ],
+        )
+
+        data = response.model_dump(exclude_none=True)
+        assert data["choices"][0]["delta"]["role"] == "assistant"
+
+    def test_stream_response_with_finish_reason(self):
+        """Test final chunk with finish_reason."""
+        response = ChatCompletionStreamResponse(
+            id="test-id",
+            model="ollama/gemma3:4b",
+            choices=[
+                StreamChoice(
+                    delta=DeltaContent(),
+                    finish_reason="stop",
+                )
+            ],
+        )
+
+        data = response.model_dump(exclude_none=True)
+        assert data["choices"][0]["finish_reason"] == "stop"