chore(core): bump @aihubmix/ai-sdk-provider to ^2.2.1

[0genlab]

PR Checklist

• The commit message follows our guidelines
• Changesets have been added

What is the current behavior?

@voltagent/core depends on @aihubmix/ai-sdk-provider@^1.0.1. Because it's a caret range, installs stay on 1.0.x (the lockfile currently resolves to 1.0.1) and never pick up the 2.x line, which has been available since Feb 2026.

What is the new behavior?

Bumps the dependency to ^2.2.1. The public API that the model registry uses (createAihubmix → buildApiKeyProvider("createAihubmix", "aihubmix")) is unchanged, and 2.x still targets AI SDK v6 / LanguageModelV3. Model routing is the same: claude-* goes to Anthropic Messages, gemini* goes to Gemini native, and everything else goes to OpenAI-compatible.

What users get:

• Streaming fix for OpenAI-compatible models (now built on @ai-sdk/openai-compatible, which fixes a Zod validation error on stream chunks)
• Custom fetch is forwarded to Claude / Gemini / Responses models (before, only OpenAI-compatible models got it)
• No redundant Authorization header on Claude / Gemini requests
• New optional baseURL / appCode settings
• zod peer range ^3.25.0 || ^4.0.0, which matches core's

Notes for reviewers

• pnpm install --lockfile-only with the repo's pinned pnpm@8.10.5. Besides the aihubmix subtree, pnpm also re-resolved a few transitive rolldown / @oxc-project/types patch versions. I didn't touch those directly; I'm happy to drop them if you'd rather keep the lockfile diff minimal.
• Verified locally: pnpm install --frozen-lockfile, tsc --noEmit in packages/core (0 errors), and vitest run on agent.spec.ts, model-provider-registry-minimax.spec.ts and memory/adapters/embedding/ai-sdk.spec.ts (141 passed). Also checked that resolveLanguageModel("aihubmix/gpt-4o-mini") returns a v3 model.

Disclosure: I maintain @aihubmix/ai-sdk-provider.

🤖 Generated with Claude Code

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Summary by cubic

Updates @voltagent/core from @aihubmix/ai-sdk-provider ^1.0.1 to ^2.2.1 so it receives the provider’s 2.x fixes without changing the existing createAihubmix integration.

• Fixes streaming for OpenAI-compatible models.
• Forwards custom fetch to Claude, Gemini, and Responses models.
• Removes redundant Authorization headers from Claude and Gemini requests.
• Keeps the existing apiKey-only core configuration; baseURL and appCode are not exposed through the registry adapter.
• Adds a patch changeset and limits lockfile updates to the provider dependency subtree.

^{Written for commit 8468902. Summary will update on new commits.}

Summary by CodeRabbit

• Updates
  • Updated the AIHubMix provider integration, including streaming, custom fetch forwarding, and authorization-header handling.

[changeset-bot]

🦋 Changeset detected

Latest commit: 8468902

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@voltagent/core	Patch

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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

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• .changeset/bump-aihubmix-provider-v2.md

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📝 Walkthrough

Walkthrough

The core package dependency on @aihubmix/ai-sdk-provider changes from ^1.0.1 to ^2.2.1. A patch changeset records the upgrade and provider changes.

Changes

AIHubmix provider dependency update

Layer / File(s)	Summary
Dependency update and release declaration packages/core/package.json, .changeset/bump-aihubmix-provider-v2.md	The core package dependency range changes to ^2.2.1. A patch changeset documents the update and provider behavior notes.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~4 minutes

Change: Other

Merge Risk: ⚪ Minimal · up to 84689

The provider upgrade and release note have no identified issue requiring a fix before merge.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely identifies the core change: upgrading @aihubmix/ai-sdk-provider to ^2.2.1.
Description check	✅ Passed	The description explains the current and new behavior, lists the provider changes, records validation results, and confirms the changeset. It does not explicitly link an issue or complete separate che…
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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[cubic-dev-ai]

All reported issues were addressed across 3 files

<sub>Reply with feedback, questions, or to request a fix.

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