– UNSUPPORTED

vercel-ai 7.0.153

stream.utf8-split · ollama

Requirements

Id	Level	Status	Evidence

Notes

The SDK has no first-party native Ollama provider; community providers are separate packages outside this shim. (https://ai-sdk.dev/providers/community-providers/ollama)

What the provider sent

Finish: stop
Raw finish: stop
Text: Café Zürich — καλημέρα! 東京で会いましょう 🌸🎉
Tool calls: []
Usage: { "alternatives": {}, "cached_input": 0, "input": 35, "output": 22, "raw": { "eval_count": 22, "prompt_eval_cached_count": 0, "prompt_eval_count": 35 }, "reasoning": null, "total": 57 }
Stream completed: true
Error: null

Wire excerpt

status: 200
content-type: application/x-ndjson
body (chunks_b64):
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qSJ9LCJkb25lIjpmYWxzZX0KeyJtb2RlbCI6InF3ZW4zLjU6MC44YiIsImNyZWF0ZWRfYXQiOiIyMDI2LTEwLTEyVDE5OjAxOjA1LjY0MzU2Mjk4NloiLCJtZXNzYWdlIjp7InJvbGUiOiJhc3Npc3RhbnQiLCJjb250ZW50IjoiIFrDvHJpY2gifSwiZG9uZSI6ZmFsc2V9CnsibW9kZWwiOiJxd2VuMy41OjAuOGIiLCJjcmVhdGVkX2F0IjoiMjAyNi0xMC0xMlQxOTowMTowNS42NDM4Mzg5NjFaIiwibWVzc2FnZSI6eyJyb2xlIjoiYXNzaXN0YW50IiwiY29udGVudCI6IiDi
gJQifSwiZG9uZSI6ZmFsc2V9CnsibW9kZWwiOiJxd2VuMy41OjAuOGIiLCJjcmVhdGVkX2F0IjoiMjAyNi0xMC0xMlQxOTowMTowNS43NTg4MTc4MjRaIiwibWVzc2FnZSI6eyJyb2xlIjoiYXNzaXN0YW50IiwiY29udGVudCI6IiDO
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

What the library reported

Outcome

unsupported

Finish

{
  "raw": null,
  "source": null,
  "surface": "absent",
  "value": null
}

Text

Value: null
Surface: absent

Tool calls

[]

Usage

{
  "cached_input": null,
  "input": null,
  "output": null,
  "reasoning": null,
  "surface": {
    "cached_input": "absent",
    "input": "absent",
    "output": "absent",
    "reasoning": "absent",
    "total": "absent"
  },
  "total": null
}

Stream

{
  "chunks_seen": 0,
  "completed": null,
  "used": true
}

Error

null

Unsupported reason

The SDK has no first-party native Ollama provider; community providers are separate packages outside this shim. https://ai-sdk.dev/providers/community-providers/ollama

Full observation JSON

{
  "elapsed_ms": 4.003762999999992,
  "error": null,
  "finish": {
    "raw": null,
    "source": null,
    "surface": "absent",
    "value": null
  },
  "format": "wiretruth.observation/v1",
  "library": {
    "api": "streamText",
    "language": "javascript",
    "name": "vercel-ai",
    "version": "7.0.153"
  },
  "notes": [],
  "outcome": "unsupported",
  "stream": {
    "chunks_seen": 0,
    "completed": null,
    "used": true
  },
  "structured": {
    "attempted": false,
    "returned_as_success": false,
    "value": null
  },
  "text": {
    "surface": "absent",
    "value": null
  },
  "tool_calls": [],
  "unsupported_reason": "The SDK has no first-party native Ollama provider; community providers are separate packages outside this shim. https://ai-sdk.dev/providers/community-providers/ollama",
  "usage": {
    "cached_input": null,
    "input": null,
    "output": null,
    "reasoning": null,
    "surface": {
      "cached_input": "absent",
      "input": "absent",
      "output": "absent",
      "reasoning": "absent",
      "total": "absent"
    },
    "total": null
  }
}

Fixture

derived ollama/stream.utf8-split

Provenance	Value
Transform	rechunk_inside_utf8
Source fixture	ollama/stream.utf8
Rationale	A network chunk boundary splits a multi-byte UTF-8 character.
Evidence	https://github.com/langchain-ai/langchainjs/issues/5285

Reproduce

wiretruth serve ollama/stream.utf8-split

Plain-library snippet from the shim manifest.

Unsupported: no first-party native Ollama provider; community providers are separate packages.

Upstream

No matching upstream report.

History

Version	Grade
7.0.153	– UNSUPPORTED
7.0.146	– UNSUPPORTED
7.0.142	– UNSUPPORTED