# 用户提示提交挂钩

用户提交消息时将调用onUserPromptSubmitted钩子。 使用它可执行以下操作：

<!-- markdownlint-disable GHD046 GHD005 -->

<!-- Suppressed: GHD046 (outdated release terminology), GHD005 (hardcoded data variable) -->

* 修改或增强用户提示
* 在处理之前添加上下文
* 筛选或验证用户输入
* 实现提示模板

## 挂钩签名

<div class="ghd-codetabs">
<div class="ghd-codetab" data-lang="typescript" data-label="TypeScript"><div class="ghd-codetab-fallback-label" role="heading" aria-level="3">TypeScript</div>

```typescript
import type { UserPromptSubmittedHookInput, HookInvocation, UserPromptSubmittedHookOutput } from "@github/copilot-sdk";
type UserPromptSubmittedHandler = (
  input: UserPromptSubmittedHookInput,
  invocation: HookInvocation
) => Promise<UserPromptSubmittedHookOutput | null | undefined>;
```

```typescript
type UserPromptSubmittedHandler = (
  input: UserPromptSubmittedHookInput,
  invocation: HookInvocation
) => Promise<UserPromptSubmittedHookOutput | null | undefined>;
```

</div>

<div class="ghd-codetab" data-lang="python" data-label="Python"><div class="ghd-codetab-fallback-label" role="heading" aria-level="3">Python</div>

```python
from copilot.session import UserPromptSubmittedHookInput, UserPromptSubmittedHookOutput
from typing import Callable, Awaitable

UserPromptSubmittedHandler = Callable[
    [UserPromptSubmittedHookInput, dict[str, str]],
    Awaitable[UserPromptSubmittedHookOutput | None]
]
```

```python
UserPromptSubmittedHandler = Callable[
    [UserPromptSubmittedHookInput, dict[str, str]],
    Awaitable[UserPromptSubmittedHookOutput | None]
]
```

</div>

<div class="ghd-codetab" data-lang="go" data-label="Go"><div class="ghd-codetab-fallback-label" role="heading" aria-level="3">Go</div>

```golang
package main

import copilot "github.com/github/copilot-sdk/go"

type UserPromptSubmittedHandler func(
    input copilot.UserPromptSubmittedHookInput,
    invocation copilot.HookInvocation,
) (*copilot.UserPromptSubmittedHookOutput, error)

func main() {}
```

```golang
type UserPromptSubmittedHandler func(
    input UserPromptSubmittedHookInput,
    invocation HookInvocation,
) (*UserPromptSubmittedHookOutput, error)
```

</div>

<div class="ghd-codetab" data-lang="dotnet" data-label=".NET"><div class="ghd-codetab-fallback-label" role="heading" aria-level="3">.NET</div>

```csharp
using GitHub.Copilot;

public delegate Task<UserPromptSubmittedHookOutput?> UserPromptSubmittedHandler(
    UserPromptSubmittedHookInput input,
    HookInvocation invocation);
```

```csharp
public delegate Task<UserPromptSubmittedHookOutput?> UserPromptSubmittedHandler(
    UserPromptSubmittedHookInput input,
    HookInvocation invocation);
```

</div>

<div class="ghd-codetab" data-lang="java" data-label="Java"><div class="ghd-codetab-fallback-label" role="heading" aria-level="3">Java</div>

```java
import com.github.copilot.rpc.*;
import java.util.concurrent.CompletableFuture;

public class UserPromptSubmittedSignature {
    UserPromptSubmittedHandler handler = (UserPromptSubmittedHookInput input, HookInvocation invocation) ->
        CompletableFuture.completedFuture(null);
    public static void main(String[] args) {}
}
```

```java
@FunctionalInterface
public interface UserPromptSubmittedHandler {
    CompletableFuture<UserPromptSubmittedHookOutput> handle(
        UserPromptSubmittedHookInput input,
        HookInvocation invocation);
}
```

</div>

</div>

## 输入

| 领域          | 类型     | 说明              |
| ----------- | ------ | --------------- |
| `timestamp` | number | 触发挂钩时的 Unix 时间戳 |
| `cwd`       | 字符串    | 当前工作目录          |
| `prompt`    | 字符串    | 用户提交的提示信息       |

## 输出

返回 `null` 或 `undefined` 以保持提示不变。 否则，返回包含以下任何字段的对象：

| 领域                  | 类型      | 说明                    |
| ------------------- | ------- | --------------------- |
| `modifiedPrompt`    | 字符串     | 使用修改后的提示代替原始提示        |
| `additionalContext` | 字符串     | 向对话添加额外上下文            |
| `suppressOutput`    | boolean | 如果为 true，则禁止显示助手的响应输出 |

## 例子

### 记录所有用户提示

<div class="ghd-codetabs">
<div class="ghd-codetab" data-lang="typescript" data-label="TypeScript"><div class="ghd-codetab-fallback-label" role="heading" aria-level="3">TypeScript</div>

```typescript
const session = await client.createSession({
  hooks: {
    onUserPromptSubmitted: async (input, invocation) => {
      console.log(`[${invocation.sessionId}] User: ${input.prompt}`);
      return null; // Pass through unchanged
    },
  },
});
```

</div>

<div class="ghd-codetab" data-lang="python" data-label="Python"><div class="ghd-codetab-fallback-label" role="heading" aria-level="3">Python</div>

```python
from copilot.session import PermissionHandler

async def on_user_prompt_submitted(input_data, invocation):
    print(f"[{invocation['session_id']}] User: {input_data['prompt']}")
    return None

session = await client.create_session(on_permission_request=PermissionHandler.approve_all, hooks={"on_user_prompt_submitted": on_user_prompt_submitted})
```

</div>

<div class="ghd-codetab" data-lang="go" data-label="Go"><div class="ghd-codetab-fallback-label" role="heading" aria-level="3">Go</div>

```golang
package main

import (
    "context"
    "fmt"
    copilot "github.com/github/copilot-sdk/go"
)

func main() {
    client := copilot.NewClient(nil)
    session, _ := client.CreateSession(context.Background(), &copilot.SessionConfig{
        OnPermissionRequest: copilot.PermissionHandler.ApproveAll,
        Hooks: &copilot.SessionHooks{
            OnUserPromptSubmitted: func(input copilot.UserPromptSubmittedHookInput, inv copilot.HookInvocation) (*copilot.UserPromptSubmittedHookOutput, error) {
                fmt.Printf("[%s] User: %s\n", inv.SessionID, input.Prompt)
                return nil, nil
            },
        },
    })
    _ = session
}
```

```golang
session, _ := client.CreateSession(context.Background(), &copilot.SessionConfig{
    Hooks: &copilot.SessionHooks{
        OnUserPromptSubmitted: func(input copilot.UserPromptSubmittedHookInput, inv copilot.HookInvocation) (*copilot.UserPromptSubmittedHookOutput, error) {
            fmt.Printf("[%s] User: %s\n", inv.SessionID, input.Prompt)
            return nil, nil
        },
    },
})
```

</div>

<div class="ghd-codetab" data-lang="dotnet" data-label=".NET"><div class="ghd-codetab-fallback-label" role="heading" aria-level="3">.NET</div>

```csharp
using GitHub.Copilot;

public static class UserPromptSubmittedExample
{
    public static async Task Main()
    {
        await using var client = new CopilotClient();
        var session = await client.CreateSessionAsync(new SessionConfig
        {
            Hooks = new SessionHooks
            {
                OnUserPromptSubmitted = (input, invocation) =>
                {
                    Console.WriteLine($"[{invocation.SessionId}] User: {input.Prompt}");
                    return Task.FromResult<UserPromptSubmittedHookOutput?>(null);
                },
            },
        });
    }
}
```

```csharp
var session = await client.CreateSessionAsync(new SessionConfig
{
    Hooks = new SessionHooks
    {
        OnUserPromptSubmitted = (input, invocation) =>
        {
            Console.WriteLine($"[{invocation.SessionId}] User: {input.Prompt}");
            return Task.FromResult<UserPromptSubmittedHookOutput?>(null);
        },
    },
});
```

</div>

<div class="ghd-codetab" data-lang="java" data-label="Java"><div class="ghd-codetab-fallback-label" role="heading" aria-level="3">Java</div>

<!-- docs-validate: skip -->

```java
import com.github.copilot.*;
import com.github.copilot.rpc.*;
import java.util.concurrent.CompletableFuture;

var hooks = new SessionHooks()
    .setOnUserPromptSubmitted((input, invocation) -> {
        System.out.println("[" + invocation.getSessionId() + "] User: " + input.prompt());
        return CompletableFuture.completedFuture(null);
    });

var session = client.createSession(
    new SessionConfig()
        .setOnPermissionRequest(PermissionHandler.APPROVE_ALL)
        .setHooks(hooks)
).get();
```

</div>

</div>

### 添加项目上下文

```typescript
const session = await client.createSession({
  hooks: {
    onUserPromptSubmitted: async (input) => {
      const projectInfo = await getProjectInfo();
      
      return {
        additionalContext: `
Project: ${projectInfo.name}
Language: ${projectInfo.language}
Framework: ${projectInfo.framework}
        `.trim(),
      };
    },
  },
});
```

### 展开简写命令

```typescript
const SHORTCUTS: Record<string, string> = {
  "/fix": "Please fix the errors in the code",
  "/explain": "Please explain this code in detail",
  "/test": "Please write unit tests for this code",
  "/refactor": "Please refactor this code to improve readability and maintainability",
};

const session = await client.createSession({
  hooks: {
    onUserPromptSubmitted: async (input) => {
      for (const [shortcut, expansion] of Object.entries(SHORTCUTS)) {
        if (input.prompt.startsWith(shortcut)) {
          const rest = input.prompt.slice(shortcut.length).trim();
          return {
            modifiedPrompt: `${expansion}${rest ? `: ${rest}` : ""}`,
          };
        }
      }
      return null;
    },
  },
});
```

### 内容筛选

```typescript
const BLOCKED_PATTERNS = [
  /password\s*[:=]/i,
  /api[_-]?key\s*[:=]/i,
  /secret\s*[:=]/i,
];

const session = await client.createSession({
  hooks: {
    onUserPromptSubmitted: async (input) => {
      for (const pattern of BLOCKED_PATTERNS) {
        if (pattern.test(input.prompt)) {
          // Replace the prompt with a warning message
          return {
            modifiedPrompt: "[Content blocked: Please don't include sensitive credentials in your prompts. Use environment variables instead.]",
            suppressOutput: true,
          };
        }
      }
      return null;
    },
  },
});
```

### 强制实施提示长度限制

```typescript
const MAX_PROMPT_LENGTH = 10000;

const session = await client.createSession({
  hooks: {
    onUserPromptSubmitted: async (input) => {
      if (input.prompt.length > MAX_PROMPT_LENGTH) {
        // Truncate the prompt and add context
        return {
          modifiedPrompt: input.prompt.substring(0, MAX_PROMPT_LENGTH),
          additionalContext: `Note: The original prompt was ${input.prompt.length} characters and was truncated to ${MAX_PROMPT_LENGTH} characters.`,
        };
      }
      return null;
    },
  },
});
```

### 添加用户首选项

```typescript
interface UserPreferences {
  codeStyle: "concise" | "verbose";
  preferredLanguage: string;
  experienceLevel: "beginner" | "intermediate" | "expert";
}

const session = await client.createSession({
  hooks: {
    onUserPromptSubmitted: async (input) => {
      const prefs: UserPreferences = await loadUserPreferences();
      
      const contextParts = [];
      
      if (prefs.codeStyle === "concise") {
        contextParts.push("User prefers concise code with minimal comments.");
      } else {
        contextParts.push("User prefers verbose code with detailed comments.");
      }
      
      if (prefs.experienceLevel === "beginner") {
        contextParts.push("Explain concepts in simple terms.");
      }
      
      return {
        additionalContext: contextParts.join(" "),
      };
    },
  },
});
```

### 速率限制

```typescript
const promptTimestamps: number[] = [];
const RATE_LIMIT = 10; // prompts
const RATE_WINDOW = 60000; // 1 minute

const session = await client.createSession({
  hooks: {
    onUserPromptSubmitted: async (input) => {
      const now = Date.now();
      
      // Remove timestamps outside the window
      while (promptTimestamps.length > 0 && promptTimestamps[0] < now - RATE_WINDOW) {
        promptTimestamps.shift();
      }
      
      if (promptTimestamps.length >= RATE_LIMIT) {
        return {
          reject: true,
          rejectReason: `Rate limit exceeded. Please wait before sending more prompts.`,
        };
      }
      
      promptTimestamps.push(now);
      return null;
    },
  },
});
```

### 提示模板

```typescript
const TEMPLATES: Record<string, (args: string) => string> = {
  "bug:": (desc) => `I found a bug: ${desc}

Please help me:
1. Understand why this is happening
2. Suggest a fix
3. Explain how to prevent similar bugs`,

  "feature:": (desc) => `I want to implement this feature: ${desc}

Please:
1. Outline the implementation approach
2. Identify potential challenges
3. Provide sample code`,
};

const session = await client.createSession({
  hooks: {
    onUserPromptSubmitted: async (input) => {
      for (const [prefix, template] of Object.entries(TEMPLATES)) {
        if (input.prompt.toLowerCase().startsWith(prefix)) {
          const args = input.prompt.slice(prefix.length).trim();
          return {
            modifiedPrompt: template(args),
          };
        }
      }
      return null;
    },
  },
});
```

## 最佳做法

1. **保留用户意向** - 修改提示时，请确保核心意向保持清晰。

2. **对修改保持透明** - 如果显著更改提示，请考虑记录或通知用户。

3. **使用 `additionalContext` 而不是 `modifiedPrompt`** - 添加上下文比重写提示的干扰更小。

4. **提供明确的拒绝原因** - 拒绝提示时，请解释原因以及如何修复它。

5. **保持快速处理** - 此挂钩在每个用户消息上运行。 避免缓慢的操作。

## 另见

* [使用挂钩](/zh/copilot/how-tos/copilot-sdk/hooks)
* [会话生命周期挂钩](/zh/copilot/how-tos/copilot-sdk/hooks/session-lifecycle)
* [工具使用前挂钩](/zh/copilot/how-tos/copilot-sdk/hooks/pre-tool-use)