feat: migrate Requesty provider to AI SDK (@requesty/ai-sdk)

[daniel-lxs]

Summary

Migrate the Requesty provider from the raw OpenAI client to the dedicated @requesty/ai-sdk package using the Vercel AI SDK pattern, consistent with other migrated providers (DeepSeek, xAI, Fireworks, etc.).

Changes

New Files

• src/types/requesty-ai-sdk.d.ts — Type declarations for @requesty/ai-sdk (workaround for a packaging issue where the .d.ts filename contains a hash)

Modified Files

• src/api/providers/requesty.ts — Rewrote RequestyHandler to use createRequesty from @requesty/ai-sdk with streamText/generateText from the ai package
• src/api/providers/__tests__/requesty.spec.ts — Updated tests to mock AI SDK instead of raw OpenAI client
• src/package.json — Added @requesty/ai-sdk ^3.0.0 dependency

Key Migration Details

Aspect	Before	After
SDK	openai (raw client)	@requesty/ai-sdk + ai (Vercel AI SDK)
Provider init	new OpenAI({ baseURL, apiKey })	createRequesty({ baseURL, apiKey, headers, compatibility })
Streaming	client.chat.completions.create() → manual chunk parsing	streamText() → processAiSdkStreamPart() (shared utility)
Completion	client.chat.completions.create() → manual response parsing	generateText()
Messages	convertToOpenAiMessages()	convertToAiSdkMessages()
Tools	Raw OpenAI tool format with tool_call_partial chunks	convertToolsForAiSdk() with tool-input-start/delta/end events
Error handling	handleOpenAIError()	handleAiSdkError()
Model params format	anthropic	openai
Reasoning	Manual reasoning_effort + thinking params	providerOptions.requesty.reasoningEffort (supports effort strings and budget token counts)
Trace metadata	requesty: { trace_id, extra } in request body	providerOptions.requesty.extraBody.requesty
Cache metrics	Parsed from RequestyUsage via raw OpenAI response	Extracted from RequestyProviderMetadata via result.providerMetadata
isAiSdkProvider()	Not implemented (defaults to false)	Returns true

Test Results

• 17/17 Requesty provider tests passing
• 5376 total tests passing across the monorepo

---

Important

Migrate Requesty provider to @requesty/ai-sdk, updating RequestyHandler and tests to use new SDK functions and error handling.

• Behavior:
  • Migrate RequestyHandler in requesty.ts to use createRequesty from @requesty/ai-sdk.
  • Replace manual chunk parsing with streamText() and generateText() from ai package.
  • Update error handling to use handleAiSdkError().
• Tests:
  • Update requesty.spec.ts to mock @requesty/ai-sdk and ai package functions.
  • Ensure tests cover new behavior and error handling.
• Types:
  • Add requesty-ai-sdk.d.ts for type declarations of @requesty/ai-sdk.
• Dependencies:
  • Add @requesty/ai-sdk ^3.0.0 to package.json.

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[roomote]

Rooviewer   See task

Reviewed. No issues found. The migration follows established AI SDK provider patterns consistently and is well-structured.

_{Mention @roomote in a comment to request specific changes to this pull request or fix all unresolved issues.}