添加provider工厂和Ollama支持

- 实现ProviderFactory用于构建不同类型的provider适配器
- 添加EnvironmentCredentialResolver用于解析环境变量中的凭证
- 实现OllamaProvider支持本地模型调用
- 实现OpenAICompatibleProvider支持OpenAI兼容接口
- 在AgentRuntime中添加对ProviderError的处理
- 更新Message结构体添加tool_calls字段
- 实现provider配置的增删改查API端点
- 添加provider注册表的replace方法
- 添加HTTP基础类和工具参数解码功能
- 更新依赖添加httpx库
- 添加相关单元测试验证provider适配器功能
```

backend/app/agent/runtime.py

@@ -20,6 +20,7 @@ from app.contracts import (
     ToolResult,
 )
 from app.providers.registry import ProviderRegistry
+from app.providers.base import ProviderError
 
 
 class AgentRunNotFoundError(LookupError):
@@ -141,6 +142,8 @@ class AgentRuntime:
                 self._finish_cancelled(record)
         except TimeoutError:
             self._fail(record, "AGENT_TIMEOUT", "Agent run exceeded its timeout.")
+        except ProviderError as exc:
+            self._fail(record, exc.code, exc.message)
         except Exception as exc:
             self._fail(record, "AGENT_FAILED", str(exc))
 
@@ -183,12 +186,18 @@ class AgentRuntime:
                 return
 
             if turn.tool_calls:
-                for provider_call in turn.tool_calls:
+                calls = [
-                    call = ToolCall(
+                    ToolCall(
-                        tool_call_id=provider_call.tool_call_id,
+                        tool_call_id=item.tool_call_id,
-                        name=provider_call.name,
+                        name=item.name,
-                        arguments=provider_call.arguments,
+                        arguments=item.arguments,
                     )
+                    for item in turn.tool_calls
+                ]
+                messages.append(
+                    Message(role=MessageRole.assistant, content=turn.text or "", tool_calls=calls)
+                )
+                for call in calls:
                     result = await self._execute_tool(record, call)
                     record.run.tool_results.append(result)
                     messages.append(

backend/app/container.py

@@ -3,18 +3,21 @@ from dataclasses import dataclass
 from app.agent import AgentRuntime, PermissionManager, PermissionPolicy, ToolRegistry
 from app.agent.builtin_tools import register_builtin_tools
 from app.contracts import ModelCapability, ProviderConfig, ProviderType
-from app.providers import MockProvider, ProviderRegistry
+from app.providers import MockProvider, ProviderFactory, ProviderRegistry
+from app.providers.credentials import EnvironmentCredentialResolver
 
 
 @dataclass(frozen=True)
 class ApplicationContainer:
     providers: ProviderRegistry
+    provider_factory: ProviderFactory
     tools: ToolRegistry
     permissions: PermissionManager
     agent: AgentRuntime
 
 
 def build_container() -> ApplicationContainer:
+    provider_factory = ProviderFactory(EnvironmentCredentialResolver())
     providers = ProviderRegistry()
     providers.register(
         ProviderConfig(
@@ -40,6 +43,7 @@ def build_container() -> ApplicationContainer:
     agent = AgentRuntime(providers=providers, tools=tools, permissions=permissions)
     return ApplicationContainer(
         providers=providers,
+        provider_factory=provider_factory,
         tools=tools,
         permissions=permissions,
         agent=agent,

backend/app/contracts.py

@@ -145,6 +145,7 @@ class Message(Contract):
     content: str
     name: str | None = None
     tool_call_id: str | None = None
+    tool_calls: list["ToolCall"] = Field(default_factory=list)
 
 
 class ToolDefinition(Contract):

backend/app/providers/__init__.py

@@ -1,11 +1,15 @@
-from app.providers.base import ModelProvider, ProviderToolCall, ProviderTurn
+from app.providers.base import ModelProvider, ProviderError, ProviderToolCall, ProviderTurn
+from app.providers.factory import ProviderFactory, UnsupportedProviderError
 from app.providers.mock import MockProvider
 from app.providers.registry import ProviderRegistry
 
 __all__ = [
     "MockProvider",
     "ModelProvider",
+    "ProviderError",
+    "ProviderFactory",
     "ProviderRegistry",
     "ProviderToolCall",
     "ProviderTurn",
+    "UnsupportedProviderError",
 ]

backend/app/providers/base.py

@@ -5,6 +5,13 @@ from typing import Protocol
 from app.contracts import ModelEvent, ModelInfo, ModelRequest
 
 
+class ProviderError(RuntimeError):
+    def __init__(self, code: str, message: str) -> None:
+        super().__init__(message)
+        self.code = code
+        self.message = message
+
+
 @dataclass(slots=True)
 class ProviderToolCall:
     tool_call_id: str

backend/app/providers/credentials.py

@@ -0,0 +1,17 @@
+import os
+import re
+from typing import Protocol
+
+
+class CredentialResolver(Protocol):
+    def resolve(self, credential_id: str | None) -> str | None: ...
+
+
+class EnvironmentCredentialResolver:
+    """解析由桌面 Host 注入 Sidecar 进程的临时凭证上下文。"""
+
+    def resolve(self, credential_id: str | None) -> str | None:
+        if not credential_id:
+            return None
+        normalized = re.sub(r"[^A-Za-z0-9]", "_", credential_id).upper()
+        return os.getenv(f"AINOTE_CREDENTIAL_{normalized}")

backend/app/providers/factory.py

@@ -0,0 +1,48 @@
+from app.contracts import ModelCapability, ProviderConfig, ProviderType
+from app.providers.base import ModelProvider
+from app.providers.credentials import CredentialResolver
+from app.providers.ollama import OllamaProvider
+from app.providers.openai_compatible import OpenAICompatibleProvider
+
+
+class UnsupportedProviderError(ValueError):
+    pass
+
+
+class ProviderFactory:
+    def __init__(self, credentials: CredentialResolver) -> None:
+        self.credentials = credentials
+
+    def build(self, config: ProviderConfig) -> ModelProvider:
+        if config.provider_type in {
+            ProviderType.openai_chat,
+            ProviderType.openai_compatible,
+        }:
+            return OpenAICompatibleProvider(
+                base_url=config.base_url or "https://api.openai.com/v1",
+                credential_id=config.credential_id,
+                credentials=self.credentials,
+            )
+        if config.provider_type == ProviderType.ollama:
+            return OllamaProvider(config.base_url or "http://127.0.0.1:11434")
+        raise UnsupportedProviderError(config.provider_type.value)
+
+    @staticmethod
+    def capabilities(provider_type: ProviderType) -> list[ModelCapability]:
+        if provider_type in {
+            ProviderType.openai_chat,
+            ProviderType.openai_compatible,
+        }:
+            return [
+                ModelCapability.chat,
+                ModelCapability.tool_calling,
+                ModelCapability.streaming,
+                ModelCapability.structured_output,
+            ]
+        if provider_type == ProviderType.ollama:
+            return [
+                ModelCapability.chat,
+                ModelCapability.tool_calling,
+                ModelCapability.streaming,
+            ]
+        return []

backend/app/providers/http_base.py

@@ -0,0 +1,82 @@
+import json
+from collections.abc import AsyncIterator
+from datetime import datetime, timezone
+
+from app.contracts import ModelEvent, ModelEventType, ModelRequest
+from app.providers.base import ProviderError, ProviderTurn
+
+
+class TurnStreamingMixin:
+    async def complete(self, request: ModelRequest) -> ProviderTurn:
+        raise NotImplementedError
+
+    async def stream(self, request: ModelRequest) -> AsyncIterator[ModelEvent]:
+        try:
+            turn = await self.complete(request)
+            sequence = 0
+            if turn.text:
+                yield ModelEvent(
+                    event=ModelEventType.text_delta,
+                    sequence=sequence,
+                    data={"text": turn.text},
+                    timestamp=datetime.now(timezone.utc),
+                )
+                sequence += 1
+            for call in turn.tool_calls:
+                yield ModelEvent(
+                    event=ModelEventType.tool_call_start,
+                    sequence=sequence,
+                    data={
+                        "tool_call_id": call.tool_call_id,
+                        "name": call.name,
+                        "arguments": call.arguments,
+                    },
+                    timestamp=datetime.now(timezone.utc),
+                )
+                sequence += 1
+                yield ModelEvent(
+                    event=ModelEventType.tool_call_end,
+                    sequence=sequence,
+                    data={"tool_call_id": call.tool_call_id},
+                    timestamp=datetime.now(timezone.utc),
+                )
+                sequence += 1
+            yield ModelEvent(
+                event=ModelEventType.usage,
+                sequence=sequence,
+                data={
+                    "input_tokens": turn.input_tokens,
+                    "output_tokens": turn.output_tokens,
+                },
+                timestamp=datetime.now(timezone.utc),
+            )
+            yield ModelEvent(
+                event=ModelEventType.done,
+                sequence=sequence + 1,
+                timestamp=datetime.now(timezone.utc),
+            )
+        except ProviderError as exc:
+            yield ModelEvent(
+                event=ModelEventType.error,
+                data={"code": exc.code, "message": exc.message},
+                timestamp=datetime.now(timezone.utc),
+            )
+            yield ModelEvent(
+                event=ModelEventType.done,
+                sequence=1,
+                timestamp=datetime.now(timezone.utc),
+            )
+
+
+def decode_tool_arguments(value: object) -> dict[str, object]:
+    if isinstance(value, dict):
+        return value
+    if not isinstance(value, str):
+        raise ProviderError("PROVIDER_INVALID_RESPONSE", "Tool arguments are not JSON.")
+    try:
+        decoded = json.loads(value)
+    except json.JSONDecodeError as exc:
+        raise ProviderError("PROVIDER_INVALID_RESPONSE", "Tool arguments are invalid JSON.") from exc
+    if not isinstance(decoded, dict):
+        raise ProviderError("PROVIDER_INVALID_RESPONSE", "Tool arguments must be an object.")
+    return decoded

backend/app/providers/ollama.py

@@ -0,0 +1,117 @@
+from uuid import uuid4
+
+import httpx
+
+from app.contracts import ModelCapability, ModelInfo, ModelRequest
+from app.providers.base import ProviderError, ProviderToolCall, ProviderTurn
+from app.providers.http_base import TurnStreamingMixin, decode_tool_arguments
+
+
+class OllamaProvider(TurnStreamingMixin):
+    def __init__(
+        self,
+        base_url: str = "http://127.0.0.1:11434",
+        timeout_seconds: float = 120,
+        transport: httpx.AsyncBaseTransport | None = None,
+    ) -> None:
+        self.base_url = base_url.rstrip("/")
+        self.timeout_seconds = timeout_seconds
+        self.transport = transport
+
+    async def complete(self, request: ModelRequest) -> ProviderTurn:
+        messages = []
+        if request.system:
+            messages.append({"role": "system", "content": request.system})
+        for message in request.messages:
+            item: dict[str, object] = {
+                "role": message.role.value,
+                "content": message.content,
+            }
+            if message.tool_calls:
+                item["tool_calls"] = [
+                    {
+                        "function": {
+                            "name": call.name,
+                            "arguments": call.arguments,
+                        }
+                    }
+                    for call in message.tool_calls
+                ]
+            messages.append(item)
+        payload: dict[str, object] = {
+            "model": request.model,
+            "messages": messages,
+            "stream": False,
+        }
+        if request.tools:
+            payload["tools"] = [
+                {
+                    "type": "function",
+                    "function": {
+                        "name": tool.name,
+                        "description": tool.description,
+                        "parameters": tool.parameters,
+                    },
+                }
+                for tool in request.tools
+            ]
+        data = await self._request("POST", "/api/chat", json=payload)
+        message = data.get("message") or {}
+        tool_calls = []
+        for raw_call in message.get("tool_calls") or []:
+            function = raw_call.get("function") or {}
+            tool_calls.append(
+                ProviderToolCall(
+                    tool_call_id=raw_call.get("id") or f"call_{uuid4().hex}",
+                    name=function.get("name") or "",
+                    arguments=decode_tool_arguments(function.get("arguments", {})),
+                )
+            )
+        return ProviderTurn(
+            text=message.get("content") or None,
+            tool_calls=tool_calls,
+            input_tokens=int(data.get("prompt_eval_count") or 0),
+            output_tokens=int(data.get("eval_count") or 0),
+        )
+
+    async def list_models(self) -> list[ModelInfo]:
+        data = await self._request("GET", "/api/tags")
+        return [
+            ModelInfo(
+                model=item["name"],
+                display_name=item.get("name", ""),
+                capabilities=[ModelCapability.chat, ModelCapability.streaming],
+            )
+            for item in data.get("models", [])
+            if isinstance(item, dict) and item.get("name")
+        ]
+
+    async def test_connection(self, model: str | None = None) -> tuple[bool, str]:
+        try:
+            models = await self.list_models()
+        except ProviderError as exc:
+            return False, exc.message
+        if model and model not in {item.model for item in models}:
+            return False, f"Model is not installed: {model}"
+        return True, f"Connected; discovered {len(models)} local model(s)."
+
+    async def _request(self, method: str, path: str, **kwargs) -> dict:
+        try:
+            async with httpx.AsyncClient(
+                timeout=self.timeout_seconds, transport=self.transport
+            ) as client:
+                response = await client.request(method, f"{self.base_url}{path}", **kwargs)
+                response.raise_for_status()
+                data = response.json()
+        except httpx.TimeoutException as exc:
+            raise ProviderError("PROVIDER_TIMEOUT", "Ollama request timed out.") from exc
+        except httpx.HTTPStatusError as exc:
+            raise ProviderError(
+                "MODEL_NOT_FOUND" if exc.response.status_code == 404 else "PROVIDER_UNAVAILABLE",
+                f"Ollama returned HTTP {exc.response.status_code}.",
+            ) from exc
+        except (httpx.HTTPError, ValueError) as exc:
+            raise ProviderError("PROVIDER_UNAVAILABLE", "Ollama is unavailable.") from exc
+        if not isinstance(data, dict):
+            raise ProviderError("PROVIDER_INVALID_RESPONSE", "Ollama returned non-object JSON.")
+        return data

backend/app/providers/openai_compatible.py

@@ -0,0 +1,156 @@
+import json
+from uuid import uuid4
+
+import httpx
+
+from app.contracts import MessageRole, ModelCapability, ModelInfo, ModelRequest
+from app.providers.base import ProviderError, ProviderToolCall, ProviderTurn
+from app.providers.credentials import CredentialResolver
+from app.providers.http_base import TurnStreamingMixin, decode_tool_arguments
+
+
+class OpenAICompatibleProvider(TurnStreamingMixin):
+    def __init__(
+        self,
+        base_url: str,
+        credential_id: str | None,
+        credentials: CredentialResolver,
+        timeout_seconds: float = 60,
+        transport: httpx.AsyncBaseTransport | None = None,
+    ) -> None:
+        self.base_url = base_url.rstrip("/")
+        self.credential_id = credential_id
+        self.credentials = credentials
+        self.timeout_seconds = timeout_seconds
+        self.transport = transport
+
+    async def complete(self, request: ModelRequest) -> ProviderTurn:
+        payload: dict[str, object] = {
+            "model": request.model,
+            "messages": self._messages(request),
+            "stream": False,
+        }
+        if request.tools:
+            payload["tools"] = [
+                {
+                    "type": "function",
+                    "function": {
+                        "name": tool.name,
+                        "description": tool.description,
+                        "parameters": tool.parameters,
+                    },
+                }
+                for tool in request.tools
+            ]
+        if request.temperature is not None:
+            payload["temperature"] = request.temperature
+        if request.max_tokens is not None:
+            payload["max_tokens"] = request.max_tokens
+        if request.response_format is not None:
+            payload["response_format"] = request.response_format
+
+        data = await self._request("POST", "/chat/completions", json=payload)
+        try:
+            message = data["choices"][0]["message"]
+        except (KeyError, IndexError, TypeError) as exc:
+            raise ProviderError("PROVIDER_INVALID_RESPONSE", "Missing completion message.") from exc
+
+        tool_calls = []
+        for raw_call in message.get("tool_calls") or []:
+            function = raw_call.get("function") or {}
+            tool_calls.append(
+                ProviderToolCall(
+                    tool_call_id=raw_call.get("id") or f"call_{uuid4().hex}",
+                    name=function.get("name") or "",
+                    arguments=decode_tool_arguments(function.get("arguments", "{}")),
+                )
+            )
+        usage = data.get("usage") or {}
+        return ProviderTurn(
+            text=message.get("content"),
+            tool_calls=tool_calls,
+            input_tokens=int(usage.get("prompt_tokens") or 0),
+            output_tokens=int(usage.get("completion_tokens") or 0),
+        )
+
+    async def list_models(self) -> list[ModelInfo]:
+        data = await self._request("GET", "/models")
+        return [
+            ModelInfo(
+                model=item["id"],
+                display_name=item["id"],
+                capabilities=[
+                    ModelCapability.chat,
+                    ModelCapability.tool_calling,
+                    ModelCapability.streaming,
+                ],
+            )
+            for item in data.get("data", [])
+            if isinstance(item, dict) and item.get("id")
+        ]
+
+    async def test_connection(self, model: str | None = None) -> tuple[bool, str]:
+        try:
+            models = await self.list_models()
+        except ProviderError as exc:
+            return False, exc.message
+        if model and model not in {item.model for item in models}:
+            return False, f"Model is not available: {model}"
+        return True, f"Connected; discovered {len(models)} model(s)."
+
+    def _messages(self, request: ModelRequest) -> list[dict[str, object]]:
+        result: list[dict[str, object]] = []
+        if request.system:
+            result.append({"role": "system", "content": request.system})
+        for message in request.messages:
+            item: dict[str, object] = {
+                "role": message.role.value,
+                "content": message.content,
+            }
+            if message.name:
+                item["name"] = message.name
+            if message.role == MessageRole.tool and message.tool_call_id:
+                item["tool_call_id"] = message.tool_call_id
+            if message.tool_calls:
+                item["tool_calls"] = [
+                    {
+                        "id": call.tool_call_id,
+                        "type": "function",
+                        "function": {
+                            "name": call.name,
+                            "arguments": json.dumps(call.arguments),
+                        },
+                    }
+                    for call in message.tool_calls
+                ]
+            result.append(item)
+        return result
+
+    async def _request(self, method: str, path: str, **kwargs) -> dict:
+        headers = {"Content-Type": "application/json"}
+        api_key = self.credentials.resolve(self.credential_id)
+        if api_key:
+            headers["Authorization"] = f"Bearer {api_key}"
+        try:
+            async with httpx.AsyncClient(
+                timeout=self.timeout_seconds, transport=self.transport
+            ) as client:
+                response = await client.request(
+                    method, f"{self.base_url}{path}", headers=headers, **kwargs
+                )
+                response.raise_for_status()
+                data = response.json()
+        except httpx.TimeoutException as exc:
+            raise ProviderError("PROVIDER_TIMEOUT", "Provider request timed out.") from exc
+        except httpx.HTTPStatusError as exc:
+            code = {
+                401: "PROVIDER_AUTH_FAILED",
+                404: "MODEL_NOT_FOUND",
+                429: "PROVIDER_RATE_LIMITED",
+            }.get(exc.response.status_code, "PROVIDER_UNAVAILABLE")
+            raise ProviderError(code, f"Provider returned HTTP {exc.response.status_code}.") from exc
+        except (httpx.HTTPError, ValueError) as exc:
+            raise ProviderError("PROVIDER_UNAVAILABLE", "Provider is unavailable.") from exc
+        if not isinstance(data, dict):
+            raise ProviderError("PROVIDER_INVALID_RESPONSE", "Provider returned non-object JSON.")
+        return data

backend/app/providers/registry.py

@@ -27,15 +27,23 @@ class ProviderRegistry:
     def unregister(self, provider_id: str) -> None:
         self._providers.pop(provider_id, None)
 
+    def replace(self, config: ProviderConfig, adapter: ModelProvider) -> None:
+        if config.provider_id not in self._providers:
+            raise ProviderNotFoundError(config.provider_id)
+        self._providers[config.provider_id] = RegisteredProvider(config=config, adapter=adapter)
+
     def get(self, provider_id: str) -> RegisteredProvider:
-        try:
+        provider = self.get_any(provider_id)
-            provider = self._providers[provider_id]
-        except KeyError as exc:
-            raise ProviderNotFoundError(provider_id) from exc
         if not provider.config.enabled:
             raise ProviderNotFoundError(provider_id)
         return provider
 
+    def get_any(self, provider_id: str) -> RegisteredProvider:
+        try:
+            return self._providers[provider_id]
+        except KeyError as exc:
+            raise ProviderNotFoundError(provider_id) from exc
+
     def list_configs(self) -> list[ProviderConfig]:
         return [item.config.model_copy(deep=True) for item in self._providers.values()]
 

backend/app/routes.py

@@ -1,5 +1,6 @@
 from collections.abc import AsyncIterator
 from datetime import datetime, timezone
+from uuid import uuid4
 
 from fastapi import APIRouter, Query
 from fastapi.responses import StreamingResponse
@@ -49,6 +50,7 @@ from app.agent import AgentRunNotFoundError
 from app.container import container
 from app.errors import ApiError, not_implemented
 from app.providers.registry import ProviderNotFoundError
+from app.providers.factory import UnsupportedProviderError
 
 router = APIRouter(prefix="/api")
 not_implemented_response = {501: {"model": ErrorResponse, "description": "业务服务尚未实现"}}
@@ -86,6 +88,18 @@ def agent_run_or_404(run_id: str) -> AgentRun:
         ) from exc
 
 
+def configurable_provider_or_404(provider_id: str):
+    try:
+        return container.providers.get_any(provider_id)
+    except ProviderNotFoundError as exc:
+        raise ApiError(
+            404,
+            "PROVIDER_NOT_FOUND",
+            f"Provider is not registered: {provider_id}",
+            {"provider_id": provider_id},
+        ) from exc
+
+
 # Notes
 @router.get("/notes", response_model=NoteListResponse, tags=["Notes"])
 async def list_notes(
@@ -398,7 +412,7 @@ async def list_providers() -> ProviderListResponse:
     tags=["Providers"],
 )
 async def get_provider(provider_id: str) -> ProviderConfig:
-    return provider_or_404(provider_id).config.model_copy(deep=True)
+    return configurable_provider_or_404(provider_id).config.model_copy(deep=True)
 
 
 @router.post(
@@ -407,8 +421,27 @@ async def get_provider(provider_id: str) -> ProviderConfig:
     responses=not_implemented_response,
     tags=["Providers"],
 )
-async def create_provider(_: ProviderCreateRequest) -> ProviderConfig:
+async def create_provider(request: ProviderCreateRequest) -> ProviderConfig:
-    not_implemented("providers.create")
+    config = ProviderConfig(
+        provider_id=f"provider_{uuid4().hex}",
+        provider_type=request.provider_type,
+        name=request.name,
+        base_url=request.base_url,
+        default_model=request.default_model,
+        credential_id=request.credential_id,
+        enabled=request.enabled,
+        capabilities=container.provider_factory.capabilities(request.provider_type),
+    )
+    try:
+        adapter = container.provider_factory.build(config)
+    except UnsupportedProviderError as exc:
+        raise ApiError(
+            422,
+            "PROVIDER_TYPE_UNSUPPORTED",
+            f"Provider adapter is not implemented: {request.provider_type.value}",
+        ) from exc
+    container.providers.register(config, adapter)
+    return config
 
 
 @router.patch(
@@ -417,8 +450,16 @@ async def create_provider(_: ProviderCreateRequest) -> ProviderConfig:
     responses=not_implemented_response,
     tags=["Providers"],
 )
-async def update_provider(provider_id: str, _: ProviderUpdateRequest) -> ProviderConfig:
+async def update_provider(
-    not_implemented(f"providers.update:{provider_id}")
+    provider_id: str, request: ProviderUpdateRequest
+) -> ProviderConfig:
+    current = configurable_provider_or_404(provider_id).config
+    if provider_id == "mock":
+        raise ApiError(409, "BUILTIN_PROVIDER_IMMUTABLE", "Mock provider cannot be modified.")
+    config = current.model_copy(update=request.model_dump(exclude_none=True))
+    adapter = container.provider_factory.build(config)
+    container.providers.replace(config, adapter)
+    return config
 
 
 @router.delete(
@@ -428,7 +469,11 @@ async def update_provider(provider_id: str, _: ProviderUpdateRequest) -> Provide
     tags=["Providers"],
 )
 async def delete_provider(provider_id: str) -> OperationResponse:
-    not_implemented(f"providers.delete:{provider_id}")
+    configurable_provider_or_404(provider_id)
+    if provider_id == "mock":
+        raise ApiError(409, "BUILTIN_PROVIDER_IMMUTABLE", "Mock provider cannot be deleted.")
+    container.providers.unregister(provider_id)
+    return OperationResponse(status="completed", resource_id=provider_id)
 
 
 @router.get(
@@ -452,6 +497,18 @@ async def list_provider_models(provider_id: str) -> ProviderModelsResponse:
     tags=["Providers"],
 )
 async def test_provider(request: ProviderTestRequest) -> ProviderTestResponse:
+    registered = configurable_provider_or_404(request.provider_id)
+    if request.credential_context_id:
+        temporary_config = registered.config.model_copy(
+            update={"credential_id": request.credential_context_id, "enabled": True}
+        )
+        adapter = container.provider_factory.build(temporary_config)
+        success, message = await adapter.test_connection(request.model)
+        return ProviderTestResponse(
+            provider_id=request.provider_id,
+            success=success,
+            message=message,
+        )
     provider_or_404(request.provider_id)
     return await container.providers.test(request.provider_id, request.model)
 

backend/pyproject.toml

@@ -6,6 +6,7 @@ readme = "README.md"
 requires-python = ">=3.11"
 dependencies = [
     "fastapi>=0.116,<1.0",
+    "httpx>=0.28,<1.0",
     "uvicorn[standard]>=0.35,<1.0",
 ]
 

backend/tests/test_api.py

@@ -2,6 +2,8 @@ import asyncio
 
 from app.main import health, service_status
 from app.routes import get_index_status, list_notes, list_plugins, list_providers, list_skills
+from app.routes import create_provider, delete_provider, get_provider, update_provider
+from app.contracts import ProviderCreateRequest, ProviderType, ProviderUpdateRequest
 
 
 def test_health() -> None:
@@ -53,3 +55,25 @@ def test_openapi_contains_documented_frontend_interfaces() -> None:
     }
 
     assert expected_paths <= paths.keys()
+
+
+def test_provider_configuration_lifecycle() -> None:
+    created = asyncio.run(
+        create_provider(
+            ProviderCreateRequest(
+                provider_type=ProviderType.ollama,
+                name="Local Ollama",
+                base_url="http://127.0.0.1:11434",
+                default_model="qwen3:latest",
+            )
+        )
+    )
+    fetched = asyncio.run(get_provider(created.provider_id))
+    disabled = asyncio.run(
+        update_provider(created.provider_id, ProviderUpdateRequest(enabled=False))
+    )
+    deleted = asyncio.run(delete_provider(created.provider_id))
+
+    assert fetched.provider_type == ProviderType.ollama
+    assert disabled.enabled is False
+    assert deleted.resource_id == created.provider_id

backend/tests/test_provider_adapters.py

@@ -0,0 +1,154 @@
+import asyncio
+import json
+
+import httpx
+
+from app.contracts import Message, MessageRole, ModelRequest, ToolCall, ToolDefinition
+from app.providers.ollama import OllamaProvider
+from app.providers.openai_compatible import OpenAICompatibleProvider
+
+
+class StaticCredentials:
+    def resolve(self, credential_id: str | None) -> str | None:
+        return "secret-test-key" if credential_id else None
+
+
+def run(coroutine):
+    return asyncio.run(coroutine)
+
+
+def test_openai_compatible_maps_tool_call_and_credentials() -> None:
+    captured: dict = {}
+
+    def handler(request: httpx.Request) -> httpx.Response:
+        assert request.headers["Authorization"] == "Bearer secret-test-key"
+        captured.update(json.loads(request.content))
+        return httpx.Response(
+            200,
+            json={
+                "choices": [
+                    {
+                        "message": {
+                            "role": "assistant",
+                            "content": None,
+                            "tool_calls": [
+                                {
+                                    "id": "call_1",
+                                    "type": "function",
+                                    "function": {
+                                        "name": "math.add",
+                                        "arguments": '{"left":1,"right":2}',
+                                    },
+                                }
+                            ],
+                        }
+                    }
+                ],
+                "usage": {"prompt_tokens": 8, "completion_tokens": 4},
+            },
+        )
+
+    provider = OpenAICompatibleProvider(
+        base_url="https://provider.test/v1",
+        credential_id="openai-test",
+        credentials=StaticCredentials(),
+        transport=httpx.MockTransport(handler),
+    )
+    turn = run(
+        provider.complete(
+            ModelRequest(
+                provider_id="test",
+                model="test-model",
+                messages=[Message(role=MessageRole.user, content="add")],
+                tools=[
+                    ToolDefinition(
+                        name="math.add",
+                        description="Add numbers",
+                        parameters={"type": "object"},
+                    )
+                ],
+            )
+        )
+    )
+
+    assert captured["tools"][0]["function"]["name"] == "math.add"
+    assert turn.tool_calls[0].name == "math.add"
+    assert turn.tool_calls[0].arguments == {"left": 1, "right": 2}
+    assert turn.input_tokens == 8
+
+
+def test_openai_compatible_preserves_tool_call_context() -> None:
+    captured: dict = {}
+
+    def handler(request: httpx.Request) -> httpx.Response:
+        captured.update(json.loads(request.content))
+        return httpx.Response(
+            200,
+            json={
+                "choices": [{"message": {"role": "assistant", "content": "done"}}],
+                "usage": {},
+            },
+        )
+
+    provider = OpenAICompatibleProvider(
+        base_url="https://provider.test/v1",
+        credential_id=None,
+        credentials=StaticCredentials(),
+        transport=httpx.MockTransport(handler),
+    )
+    call = ToolCall(
+        tool_call_id="call_1", name="math.add", arguments={"left": 1, "right": 2}
+    )
+    turn = run(
+        provider.complete(
+            ModelRequest(
+                provider_id="test",
+                model="test-model",
+                messages=[
+                    Message(role=MessageRole.user, content="add"),
+                    Message(role=MessageRole.assistant, content="", tool_calls=[call]),
+                    Message(
+                        role=MessageRole.tool,
+                        content='{"value":3}',
+                        name="math.add",
+                        tool_call_id="call_1",
+                    ),
+                ],
+            )
+        )
+    )
+
+    assert captured["messages"][1]["tool_calls"][0]["id"] == "call_1"
+    assert captured["messages"][2]["tool_call_id"] == "call_1"
+    assert turn.text == "done"
+
+
+def test_ollama_maps_models_and_completion() -> None:
+    def handler(request: httpx.Request) -> httpx.Response:
+        if request.url.path == "/api/tags":
+            return httpx.Response(200, json={"models": [{"name": "qwen3:latest"}]})
+        return httpx.Response(
+            200,
+            json={
+                "message": {"role": "assistant", "content": "local answer"},
+                "prompt_eval_count": 5,
+                "eval_count": 2,
+            },
+        )
+
+    provider = OllamaProvider(transport=httpx.MockTransport(handler))
+    models = run(provider.list_models())
+    turn = run(
+        provider.complete(
+            ModelRequest(
+                provider_id="ollama",
+                model="qwen3:latest",
+                messages=[Message(role=MessageRole.user, content="hello")],
+            )
+        )
+    )
+
+    assert models[0].model == "qwen3:latest"
+    assert turn.text == "local answer"
+    assert turn.input_tokens == 5
+    assert turn.output_tokens == 2

backend/uv.lock

@@ -33,6 +33,15 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/da/35/f2287558c17e29fafc8ef3daf819bb9834061cfa43bff8014f7df7f63bdc/anyio-4.14.2-py3-none-any.whl", hash = "sha256:9f505dda5ac9f0c8309b5e8bd445a8c2bf7246f3ce950121e45ea15bc41d1494", size = 125813, upload-time = "2026-07-12T20:29:05.763Z" },
 ]
 
+[[package]]
+name = "certifi"
+version = "2026.7.22"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/a3/c2/24167ea9858356b47a87a50d39908bfdb72ceeefe0041586e704e5376b3a/certifi-2026.7.22.tar.gz", hash = "sha256:741e2c3b351ddf169a738da9f2c048608ff7f2c5cc02f1ebc6b118bb090d5d55", size = 138112, upload-time = "2026-07-22T03:35:12.644Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/0b/a7/71ac2cff56fec219ed242bb11b8efb69fcc4bec75db06fb7bfe35de520e6/certifi-2026.7.22-py3-none-any.whl", hash = "sha256:62f22742b58a1a33014a2b6b706588a8d7e2a88ae7bd1a6ebe8c992928483775", size = 136983, upload-time = "2026-07-22T03:35:11.276Z" },
+]
+
 [[package]]
 name = "click"
 version = "8.5.0"
@@ -76,6 +85,19 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/04/4b/29cac41a4d98d144bf5f6d33995617b185d14b22401f75ca86f384e87ff1/h11-0.16.0-py3-none-any.whl", hash = "sha256:63cf8bbe7522de3bf65932fda1d9c2772064ffb3dae62d55932da54b31cb6c86", size = 37515, upload-time = "2025-04-24T03:35:24.344Z" },
 ]
 
+[[package]]
+name = "httpcore"
+version = "1.0.9"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "certifi" },
+    { name = "h11" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/06/94/82699a10bca87a5556c9c59b5963f2d039dbd239f25bc2a63907a05a14cb/httpcore-1.0.9.tar.gz", hash = "sha256:6e34463af53fd2ab5d807f399a9b45ea31c3dfa2276f15a2c3f00afff6e176e8", size = 85484, upload-time = "2025-04-24T22:06:22.219Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/7e/f5/f66802a942d491edb555dd61e3a9961140fd64c90bce1eafd741609d334d/httpcore-1.0.9-py3-none-any.whl", hash = "sha256:2d400746a40668fc9dec9810239072b40b4484b640a8c38fd654a024c7a1bf55", size = 78784, upload-time = "2025-04-24T22:06:20.566Z" },
+]
+
 [[package]]
 name = "httptools"
 version = "0.8.0"
@@ -119,6 +141,21 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/48/63/b906c01e53f50d432c0defe43ce52764a111dc1bdd028bafbeb54dcfd008/httptools-0.8.0-cp314-cp314t-win_amd64.whl", hash = "sha256:384c17174464c8e873398b7af24f0b1f44d992c820328413951a625323155d77", size = 108209, upload-time = "2026-05-25T22:17:39.473Z" },
 ]
 
+[[package]]
+name = "httpx"
+version = "0.28.1"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "anyio" },
+    { name = "certifi" },
+    { name = "httpcore" },
+    { name = "idna" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/b1/df/48c586a5fe32a0f01324ee087459e112ebb7224f646c0b5023f5e79e9956/httpx-0.28.1.tar.gz", hash = "sha256:75e98c5f16b0f35b567856f597f06ff2270a374470a5c2392242528e3e3e42fc", size = 141406, upload-time = "2024-12-06T15:37:23.222Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/2a/39/e50c7c3a983047577ee07d2a9e53faf5a69493943ec3f6a384bdc792deb2/httpx-0.28.1-py3-none-any.whl", hash = "sha256:d909fcccc110f8c7faf814ca82a9a4d816bc5a6dbfea25d6591d6985b8ba59ad", size = 73517, upload-time = "2024-12-06T15:37:21.509Z" },
+]
+
 [[package]]
 name = "idna"
 version = "3.19"
@@ -143,6 +180,7 @@ version = "0.1.0"
 source = { virtual = "." }
 dependencies = [
     { name = "fastapi" },
+    { name = "httpx" },
     { name = "uvicorn", extra = ["standard"] },
 ]
 
@@ -154,6 +192,7 @@ dev = [
 [package.metadata]
 requires-dist = [
     { name = "fastapi", specifier = ">=0.116,<1.0" },
+    { name = "httpx", specifier = ">=0.28,<1.0" },
     { name = "uvicorn", extras = ["standard"], specifier = ">=0.35,<1.0" },
 ]