# Class: InitializationError

Error thrown when a service or component is not properly initialized. Use when accessing services before they are ready.

## Example[​](#example "Direct link to Example")

```typescript
throw new InitializationError("CacheManager not initialized");
throw new InitializationError("ServiceContext not initialized. Call ServiceContext.initialize() first.");

```

## Extends[​](#extends "Direct link to Extends")

* [`AppKitError`](./docs/api/appkit/Class.AppKitError.md)

## Constructors[​](#constructors "Direct link to Constructors")

### Constructor[​](#constructor "Direct link to Constructor")

```ts
new InitializationError(message: string, options?: {
  cause?: Error;
  clientMessage?: string;
  context?: Record<string, unknown>;
}): InitializationError;

```

#### Parameters[​](#parameters "Direct link to Parameters")

| Parameter                | Type                                                                                          |
| ------------------------ | --------------------------------------------------------------------------------------------- |
| `message`                | `string`                                                                                      |
| `options?`               | { `cause?`: `Error`; `clientMessage?`: `string`; `context?`: `Record`<`string`, `unknown`>; } |
| `options.cause?`         | `Error`                                                                                       |
| `options.clientMessage?` | `string`                                                                                      |
| `options.context?`       | `Record`<`string`, `unknown`>                                                                 |

#### Returns[​](#returns "Direct link to Returns")

`InitializationError`

#### Inherited from[​](#inherited-from "Direct link to Inherited from")

[`AppKitError`](./docs/api/appkit/Class.AppKitError.md).[`constructor`](./docs/api/appkit/Class.AppKitError.md#constructor)

## Properties[​](#properties "Direct link to Properties")

### \_clientMessage?[​](#_clientmessage "Direct link to _clientMessage?")

```ts
protected readonly optional _clientMessage: string;

```

Client-safe error message. When set, callers serializing the error to a client (SSE, HTTP body) MUST prefer `clientMessage` over `message` — `message` may contain raw upstream / SDK text including statement fragments, internal object names, and correlation IDs.

Subclasses can set this in their constructor for a fixed sanitized string. When unset, `clientMessage` defaults to a generic per-code string (see the getter), and the raw `message` is kept server-side only.

#### Inherited from[​](#inherited-from-1 "Direct link to Inherited from")

[`AppKitError`](./docs/api/appkit/Class.AppKitError.md).[`_clientMessage`](./docs/api/appkit/Class.AppKitError.md#_clientmessage)

***

### cause?[​](#cause "Direct link to cause?")

```ts
readonly optional cause: Error;

```

Optional cause of the error

#### Inherited from[​](#inherited-from-2 "Direct link to Inherited from")

[`AppKitError`](./docs/api/appkit/Class.AppKitError.md).[`cause`](./docs/api/appkit/Class.AppKitError.md#cause)

***

### code[​](#code "Direct link to code")

```ts
readonly code: "INITIALIZATION_ERROR" = "INITIALIZATION_ERROR";

```

Error code for programmatic error handling

#### Overrides[​](#overrides "Direct link to Overrides")

[`AppKitError`](./docs/api/appkit/Class.AppKitError.md).[`code`](./docs/api/appkit/Class.AppKitError.md#code)

***

### context?[​](#context "Direct link to context?")

```ts
readonly optional context: Record<string, unknown>;

```

Additional context for the error

#### Inherited from[​](#inherited-from-3 "Direct link to Inherited from")

[`AppKitError`](./docs/api/appkit/Class.AppKitError.md).[`context`](./docs/api/appkit/Class.AppKitError.md#context)

***

### isRetryable[​](#isretryable "Direct link to isRetryable")

```ts
readonly isRetryable: true = true;

```

Whether this error type is generally safe to retry

#### Overrides[​](#overrides-1 "Direct link to Overrides")

[`AppKitError`](./docs/api/appkit/Class.AppKitError.md).[`isRetryable`](./docs/api/appkit/Class.AppKitError.md#isretryable)

***

### statusCode[​](#statuscode "Direct link to statusCode")

```ts
readonly statusCode: 500 = 500;

```

HTTP status code suggestion (can be overridden)

#### Overrides[​](#overrides-2 "Direct link to Overrides")

[`AppKitError`](./docs/api/appkit/Class.AppKitError.md).[`statusCode`](./docs/api/appkit/Class.AppKitError.md#statuscode)

## Accessors[​](#accessors "Direct link to Accessors")

### clientMessage[​](#clientmessage "Direct link to clientMessage")

#### Get Signature[​](#get-signature "Direct link to Get Signature")

```ts
get clientMessage(): string;

```

Sanitized message safe to forward to clients. Override in subclasses if a more specific default is appropriate.

##### Returns[​](#returns-1 "Direct link to Returns")

`string`

#### Inherited from[​](#inherited-from-4 "Direct link to Inherited from")

[`AppKitError`](./docs/api/appkit/Class.AppKitError.md).[`clientMessage`](./docs/api/appkit/Class.AppKitError.md#clientmessage)

## Methods[​](#methods "Direct link to Methods")

### toJSON()[​](#tojson "Direct link to toJSON()")

```ts
toJSON(): Record<string, unknown>;

```

Convert error to JSON for logging/serialization. Sensitive values in context are automatically redacted.

#### Returns[​](#returns-2 "Direct link to Returns")

`Record`<`string`, `unknown`>

#### Inherited from[​](#inherited-from-5 "Direct link to Inherited from")

[`AppKitError`](./docs/api/appkit/Class.AppKitError.md).[`toJSON`](./docs/api/appkit/Class.AppKitError.md#tojson)

***

### toString()[​](#tostring "Direct link to toString()")

```ts
toString(): string;

```

Create a human-readable string representation

#### Returns[​](#returns-3 "Direct link to Returns")

`string`

#### Inherited from[​](#inherited-from-6 "Direct link to Inherited from")

[`AppKitError`](./docs/api/appkit/Class.AppKitError.md).[`toString`](./docs/api/appkit/Class.AppKitError.md#tostring)

***

### migrationFailed()[​](#migrationfailed "Direct link to migrationFailed()")

```ts
static migrationFailed(cause?: Error): InitializationError;

```

Create an initialization error for migration failure

#### Parameters[​](#parameters-1 "Direct link to Parameters")

| Parameter | Type    |
| --------- | ------- |
| `cause?`  | `Error` |

#### Returns[​](#returns-4 "Direct link to Returns")

`InitializationError`

***

### notInitialized()[​](#notinitialized "Direct link to notInitialized()")

```ts
static notInitialized(serviceName: string, hint?: string): InitializationError;

```

Create an initialization error for a service that is not ready

#### Parameters[​](#parameters-2 "Direct link to Parameters")

| Parameter     | Type     |
| ------------- | -------- |
| `serviceName` | `string` |
| `hint?`       | `string` |

#### Returns[​](#returns-5 "Direct link to Returns")

`InitializationError`

***

### setupFailed()[​](#setupfailed "Direct link to setupFailed()")

```ts
static setupFailed(component: string, cause?: Error): InitializationError;

```

Create an initialization error for setup failure

#### Parameters[​](#parameters-3 "Direct link to Parameters")

| Parameter   | Type     |
| ----------- | -------- |
| `component` | `string` |
| `cause?`    | `Error`  |

#### Returns[​](#returns-6 "Direct link to Returns")

`InitializationError`