feat: Better Custom Endpoint BYOK#325468
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Pull request overview
Adds richer BYOK custom-endpoint configuration and model discovery.
Changes:
- Adds auto-fetching and global/per-model overrides.
- Adds descriptions, icons, token limits, and pricing metadata.
- Expands the custom-endpoint configuration schema.
Reviewed changes
Copilot reviewed 3 out of 3 changed files in this pull request and generated 11 comments.
| File | Description |
|---|---|
customEndpointProvider.ts |
Implements discovery, merging, URL resolution, and capabilities. |
byokProvider.ts |
Adds model metadata and pricing support. |
package.json |
Expands the custom-endpoint schema and normalizes Unicode escapes. |
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| let fetchedModels: OpenAICompatibleLanguageModelChatInformation<CustomEndpointModelProviderConfig>[] = []; | ||
| if (autoFetch && configuration?.url) { | ||
| fetchedModels = await super.getAllModels(silent, apiKey, configuration); |
| const autoFetch = configuration?.autoFetch ?? (!configuration?.models || configuration.models.length === 0); | ||
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| let fetchedModels: OpenAICompatibleLanguageModelChatInformation<CustomEndpointModelProviderConfig>[] = []; | ||
| if (autoFetch && configuration?.url) { |
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| for (const modelConfig of explicitModels) { | ||
| const mergedConfig = { ...globalConfig, ...modelConfig } as CustomEndpointModelConfig; | ||
| models.push({ | ||
| ...byokKnownModelToAPIInfoWithEffort(this._name, mergedConfig.id, mergedConfig), | ||
| url: mergedConfig.url || configuration?.url || '' |
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| const explicitModels = configuration?.models || []; | ||
| const explicitIds = new Set(explicitModels.map(m => m.id)); | ||
| const globalConfig = configuration?.global || {}; | ||
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| for (const model of fetchedModels) { | ||
| if (!explicitIds.has(model.id)) { | ||
| const mergedConfig = { ...globalConfig, id: model.id, name: model.name, url: configuration!.url! } as CustomEndpointModelConfig; |
| const mergedConfig = { ...globalConfig, ...modelConfig } as CustomEndpointModelConfig; | ||
| models.push({ | ||
| ...byokKnownModelToAPIInfoWithEffort(this._name, mergedConfig.id, mergedConfig), | ||
| url: mergedConfig.url || configuration?.url || '' |
| name: model.name, | ||
| maxInputTokens: modelConfiguration.maxInputTokens ?? model.maxInputTokens, | ||
| maxOutputTokens: modelConfiguration.maxOutputTokens ?? model.maxOutputTokens, | ||
| contextWindow: modelConfiguration.contextWindow ?? modelConfiguration.maxTokens, |
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| toolCalling: modelConfiguration.toolCalling ?? !!model.capabilities?.toolCalling ?? false, | ||
| vision: modelConfiguration.vision ?? !!model.capabilities?.imageInput ?? false, |
| inputCost: capabilities.credits?.input, | ||
| outputCost: capabilities.credits?.output, | ||
| cacheCost: capabilities.credits?.cacheRead, | ||
| ...(capabilities.icon ? { icon: capabilities.icon } : {}) as any, |
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| const autoFetch = configuration?.autoFetch ?? (!configuration?.models || configuration.models.length === 0); | ||
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| let fetchedModels: OpenAICompatibleLanguageModelChatInformation<CustomEndpointModelProviderConfig>[] = []; | ||
| if (autoFetch && configuration?.url) { | ||
| fetchedModels = await super.getAllModels(silent, apiKey, configuration); |
| reasoningEffortFormat?: 'chat-completions' | 'responses' | 'messages'; | ||
| description?: string; | ||
| icon?: string; | ||
| maxTokens?: number; |
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Fixes #325237
Description
This PR enhances the Better Custom Endpoint BYOK (Bring Your Own Key) feature by adding more flexibility to how models are configured and mapped in VS Code.
Key Changes
Global Configuration & Root URL Support:
customendpointschema now accepts a root-levelurland aglobalsettings block. This allows users to configure standard defaults once (such asvision,toolCalling, and token limits) which are inherited by all explicit or auto-fetched models.Auto-Fetch Integration:
autoFetchsupport (enabled by default when themodelsarray is empty). It correctly merges dynamically fetched models from the endpoint with theglobalsettings and specific explicit overrides provided by the user.Intelligent API Type Inference:
createOpenAIEndPointnow dynamically infersapiType(e.g.,chat-completions,responses,messages) from explicitly provided URL paths (e.g.,/v1/chat/completionsor/v1/messages). This reduces boilerplate configuration, allowing users to simply paste their full endpoint URL.Rich Model Metadata:
description,icon,maxTokens, andcredits(input, output, cacheRead).descriptionto the model picker tooltip andmaxTokenstocontextWindow.creditsinto VS Code's internalbilling.token_prices.defaultAPI structure to appropriately track costs in the UI.This makes the
customendpointprovider significantly more powerful while reducing the repetitive configuration needed for OpenRouter-style or standard OpenAI-compatible endpoints.