# Engine Module

The engine module implements the inference runtime pillar. All backends
implement the `InferenceEngine` ABC with `generate()`, `stream()`,
`list_models()`, and `health()` methods. The discovery subsystem probes
running engines and selects the best available backend based on
configuration and health checks.

## Abstract Base Class

### InferenceEngine

::: openjarvis.engine._stubs.InferenceEngine
    options:
      show_source: true
      members_order: source

### EngineConnectionError

::: openjarvis.engine._base.EngineConnectionError
    options:
      show_source: true

### messages_to_dicts

::: openjarvis.engine._base.messages_to_dicts
    options:
      show_source: true

---

## Engine Implementations

### OllamaEngine

::: openjarvis.engine.ollama.OllamaEngine
    options:
      show_source: true
      members_order: source

### VLLMEngine

::: openjarvis.engine.vllm.VLLMEngine
    options:
      show_source: true
      members_order: source

### LlamaCppEngine

::: openjarvis.engine.llamacpp.LlamaCppEngine
    options:
      show_source: true
      members_order: source

### SGLangEngine

::: openjarvis.engine.sglang.SGLangEngine
    options:
      show_source: true
      members_order: source

### CloudEngine

::: openjarvis.engine.cloud.CloudEngine
    options:
      show_source: true
      members_order: source

### estimate_cost

::: openjarvis.engine.cloud.estimate_cost
    options:
      show_source: true

---

## Engine Discovery

Functions for probing running engines, aggregating available models,
and selecting the best engine for a given configuration.

### get_engine

::: openjarvis.engine._discovery.get_engine
    options:
      show_source: true

### discover_engines

::: openjarvis.engine._discovery.discover_engines
    options:
      show_source: true

### discover_models

::: openjarvis.engine._discovery.discover_models
    options:
      show_source: true