# AI Skills API

Local infrastructure for AI context management. Reduce token consumption by 60-80% through smart RAG, conversation compression, and reusable skills.

## Quick Start

```bash
# Copy config file (optional, uses defaults if missing)
cp config.yaml.example config.yaml  # customize if needed

# Run with Docker
docker compose up -d

# Or run locally
pip install -r requirements.txt
uvicorn main:app --reload
```

API available at `http://helm:8675`
Docs at `http://helm:8675/docs`

## Key Features

- **Smart RAG**: Pre-computed embeddings, <5ms retrieval, returns only relevant skills/snippets
- **Conversation Compression**: Extractive summarization or Ollama (phi-3-mini) - saves 50-75% on history
- **Project Memory**: Store decisions and learnings per project
- **Simple API**: RESTful JSON API + MCP server for Claude Desktop
- **Zero-friction auth**: Optional API key (set-and-forget)

## Configuration

Create `config.yaml` (optional) to customize:

```yaml
port: 8675
rag:
  max_skills: 3
  max_conventions: 2
  max_snippets: 2
compression:
  enabled: true
  strategy: "extractive"  # or "ollama" for phi-3-mini
auth:
  enabled: false  # set to true and change api_key
```

Or use environment variables (see `config.py` for full list).

## Endpoints

| Endpoint | Description | Auth |
|----------|-------------|------|
| `GET /health` | Health check | No |
| `GET /config` | Show current config | Yes |
| `GET /skills` | List all skills | Yes |
| `GET /skills/{id}` | Get skill (increments usage) | Yes |
| `POST /skills` | Create skill | Yes |
| `PUT /skills/{id}` | Update skill | Yes |
| `DELETE /skills/{id}` | Delete skill | Yes |
| `GET /skills/search?q=query` | Search skills | Yes |
| `GET /snippets` | List snippets | Yes |
| `POST /snippets` | Create snippet | Yes |
| `DELETE /snippets/{id}` | Delete snippet | Yes |
| `GET /conventions` | List conventions | Yes |
| `GET /conventions?project=/path` | Get project conventions | Yes |
| `POST /conventions` | Create convention | Yes |
| `DELETE /conventions/{id}` | Delete convention | Yes |
| `GET /memory` | List memory entries | Yes |
| `GET /memory?project=name` | Get project memory | Yes |
| `POST /memory` | Create memory entry | Yes |
| `PUT /memory/{id}` | Update memory | Yes |
| `DELETE /memory/{id}` | Delete memory | Yes |
| `GET /context/rag?query=...` | **RAG context** (smart retrieval) | Yes |
| `POST /compress` | **Compress conversation** | Yes |
| `GET /tokens/count?text=...` | Count tokens | Yes |
| `POST /admin/clear-cache` | Clear RAG cache | Yes |

**Note**: Endpoints marked "Yes" require API key if auth is enabled (default: disabled).

## Integration Pattern

```python
import httpx

async def query_llm(prompt, conversation_history, project=None):
    # 1. Get relevant context (RAG) - biggest token saver
    context = await httpx.get(
        "http://helm:8675/context/rag",
        params={"query": prompt, "project": project}
    ).json()
    
    # Inject context into your LLM prompt
    system_prompt = f"{context['skills']}\n{context['conventions']}"
    
    # 2. Call LLM with context + conversation
    response = call_llm(system_prompt, conversation_history, prompt)
    
    # 3. Store learnings in memory
    await httpx.post(
        "http://helm:8675/memory",
        json={"project": project, "key": "decision", "content": response}
    )
    
    # 4. Periodically compress old conversation turns
    if len(conversation_history) > 10:
        await httpx.post(
            "http://helm:8675/compress",
            json={"messages": conversation_history}
        )
    
    return response
```

**Expected savings**: 60-80% token reduction vs. sending everything.

## Template Repository

Want to get started quickly? Use the agent template:

```bash
# Clone the template (on your Forgejo)
git clone git.bouncypixel.com:helm/ai-agent-template.git
cd ai-agent-template
cp .env.example .env
docker compose up -d
```

The template includes a working agent integration and docker-compose setup.

## How It Works (Architecture)

### RAG Engine (Fast)
- All skills/snippets are loaded into memory at startup with pre-computed embeddings
- Queries embed once, compute cosine similarity against cached embeddings
- Returns top-K most relevant items (<5ms for 1000 items)
- No external API calls, no database queries per request

### Compression (Configurable)
- **Extractive** (default): Uses LSA summarization to pick key sentences - fast, no model
- **Ollama**: Sends to local phi-3-mini for high-quality summaries (~2s)
- Keeps recent turns full, replaces old with summary

### Memory Store
- Simple key-value per project
- Stores decisions, configurations, learnings
- Retrieved via `/memory?project=...`

## MCP Server Integration

If you use Claude Desktop, add to your config:

```json
{
  "mcpServers": {
    "skills": {
      "command": "python",
      "args": ["/path/to/ai-skills-api/mcp/skills.py"],
      "env": {
        "SKILLS_API_URL": "http://helm:8675"
      }
    }
  }
}
```

Available tools:
- `search_skills`, `get_skill`, `list_skills`
- `get_context`, `get_conventions`, `get_snippets`
- `check_cache` (deprecated), `get_memory`, `add_memory`, `create_skill`

## Migration from v1

If you were using the old semantic cache:
- **Deleted**: Semantic cache endpoints and model
- **Migrate**: Any stored skills/snippets remain (tags now JSON)
- **Upgrade**: Pull new image, restart, optionally enable auth

## Performance

- RAG latency: ~5ms (cached embeddings)
- Embedding model load: ~100MB RAM, ~2s cold start
- Compression: 100-500ms (extractive) or ~2s (ollama)
- Supports 1000+ skills/snippets without degradation

## License

MIT

## Example Usage

### Create a skill
```bash
curl -X POST http://helm:8675/skills \
  -H "Content-Type: application/json" \
  -d '{
    "id": "homelab-docker-compose",
    "name": "Docker Compose Standard",
    "category": "homelab",
    "content": "Always use docker-compose v3.8+. Include health checks, restart policies, and resource limits.",
    "tags": ["docker", "compose", "infrastructure"]
  }'
```

### Get context bundle
```bash
curl "http://helm:8675/context?project=/home/server/apps/media-server&skills=homelab-docker-compose,react-v2"
```

### Check cache
```bash
curl -X POST http://helm:8675/cache/lookup \
  -H "Content-Type: application/json" \
  -d '{
    "prompt": "How do I configure traefik?",
    "model": "claude-3-opus"
  }'
```

## Integration Pattern

In your agent's system prompt or pre-request hook:

1. Call `GET /context?project={current_project}&skills={skill_ids}`
2. Inject returned content into the prompt
3. Before sending to LLM, check `POST /cache/lookup`
4. After receiving response, optionally `POST /cache/store`

This avoids re-sending your standards every request and caches repeated queries.

## Database

SQLite database `ai.db` with tables:
- `skills` - Reusable patterns and instructions
- `snippets` - Code snippets
- `conventions` - Project-specific conventions
- `cache` - LRU cache of LLM responses
- `memory` - Project memory/notes