Initial commit: OpenRouter Python SDK

Auto-generated Python SDK for OpenRouter API, providing comprehensive client library with:
- Chat completions and streaming support
- Embeddings API
- Model and provider information
- API key management
- Analytics and usage tracking
- OAuth authentication flows
- Full type hints and error handling

docs/sdks/generations/README.md

@@ -0,0 +1,58 @@
+# Generations
+(*generations*)
+
+## Overview
+
+Generation history endpoints
+
+### Available Operations
+
+* [get_generation](#get_generation) - Get request & usage metadata for a generation
+
+## get_generation
+
+Get request & usage metadata for a generation
+
+### Example Usage
+
+<!-- UsageSnippet language="python" operationID="getGeneration" method="get" path="/generation" -->
+```python
+from openrouter import OpenRouter
+import os
+
+
+with OpenRouter(
+    api_key=os.getenv("OPENROUTER_API_KEY", ""),
+) as open_router:
+
+    res = open_router.generations.get_generation(id="<id>")
+
+    # Handle response
+    print(res)
+
+```
+
+### Parameters
+
+| Parameter                                                           | Type                                                                | Required                                                            | Description                                                         |
+| ------------------------------------------------------------------- | ------------------------------------------------------------------- | ------------------------------------------------------------------- | ------------------------------------------------------------------- |
+| `id`                                                                | *str*                                                               | :heavy_check_mark:                                                  | N/A                                                                 |
+| `retries`                                                           | [Optional[utils.RetryConfig]](../../models/utils/retryconfig.md)    | :heavy_minus_sign:                                                  | Configuration to override the default retry behavior of the client. |
+
+### Response
+
+**[models.GetGenerationResponse](../../models/getgenerationresponse.md)**
+
+### Errors
+
+| Error Type                             | Status Code                            | Content Type                           |
+| -------------------------------------- | -------------------------------------- | -------------------------------------- |
+| errors.UnauthorizedResponseError       | 401                                    | application/json                       |
+| errors.PaymentRequiredResponseError    | 402                                    | application/json                       |
+| errors.NotFoundResponseError           | 404                                    | application/json                       |
+| errors.TooManyRequestsResponseError    | 429                                    | application/json                       |
+| errors.InternalServerResponseError     | 500                                    | application/json                       |
+| errors.BadGatewayResponseError         | 502                                    | application/json                       |
+| errors.EdgeNetworkTimeoutResponseError | 524                                    | application/json                       |
+| errors.ProviderOverloadedResponseError | 529                                    | application/json                       |
+| errors.OpenRouterDefaultError          | 4XX, 5XX                               | \*/\*                                  |