Adds OpenAIUsageDebuggingPlugin. Closes #1413 #1427
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Pull Request Overview
This PR adds a new OpenAIUsageDebuggingPlugin that tracks and logs OpenAI API usage metrics to a CSV file, while refactoring shared utility code from OpenAITelemetryPlugin into reusable components.
- Extracts
TryGetOpenAIRequest,IsStreamingResponse, andGetBodyFromStreamingResponseto shared utilities - Implements
OpenAIUsageDebuggingPluginto record token usage, rate limits, and error details to CSV - Adds
PromptTokenDetailsmodel to capture cached token metrics
Reviewed Changes
Copilot reviewed 4 out of 4 changed files in this pull request and generated 4 comments.
| File | Description |
|---|---|
| DevProxy.Plugins/Utils/HttpUtils.cs | New utility class containing shared HTTP response handling methods for streaming responses |
| DevProxy.Plugins/Inspection/OpenAIUsageDebuggingPlugin.cs | New plugin that logs OpenAI API usage metrics (tokens, rate limits, errors) to CSV files |
| DevProxy.Plugins/Inspection/OpenAITelemetryPlugin.cs | Refactored to use shared utilities from HttpUtils and OpenAIRequest |
| DevProxy.Abstractions/LanguageModel/OpenAIModels.cs | Added TryGetOpenAIRequest static method and PromptTokenDetails class for cached token tracking |
garrytrinder
previously approved these changes
Oct 28, 2025
- Use DateTime.TryParse for the response Date header and fall back to DateTime.Now when missing/invalid. - Extract TryParseHeaderAsLong helper to centralize/parsing of numeric headers. - Replace inline parsing for x-ratelimit-remaining-tokens and x-ratelimit-remaining-requests with the new helper. - Add missing using for Titanium.Web.Proxy.Http.
garrytrinder
approved these changes
Oct 28, 2025
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Adds OpenAIUsageDebuggingPlugin. Closes #1413