本文為英文版的機器翻譯版本，如內容有任何歧義或不一致之處，概以英文版為準。

壓縮

壓縮透過在接近內容視窗限制時自動摘要較舊的內容，來擴展長時間執行的對話和任務的有效內容長度。這非常適合：

下列模型支援壓縮：

壓縮的運作方式

啟用壓縮時， 會在接近設定的字符閾值時Claude自動總結您的對話。API：

在後續請求中，將回應附加至您的訊息。API 會在compaction封鎖之前自動捨棄所有訊息區塊，繼續摘要中的對話。

基本使用

在訊息 API 請求context_management.edits中將compact_20260112策略新增至 ，以啟用壓縮。

CLI

aws bedrock-runtime invoke-model \
    --model-id "us.anthropic.claude-opus-4-6-v1" \
    --body '{
        "anthropic_version": "bedrock-2023-05-31",
        "anthropic_beta": ["compact-2026-01-12"],
        "max_tokens": 4096,
        "messages": [
            {
                "role": "user",
                "content": "Help me build a website"
            }
        ],
        "context_management": {
            "edits": [
                {
                    "type": "compact_20260112"
                }
            ]
        }
    }' \
    --cli-binary-format raw-in-base64-out \
    /tmp/response.json

echo "Response:"
cat /tmp/response.json | jq '.content[] | {type, text: .text[0:500]}'

Python

import boto3
import json

bedrock_runtime = boto3.client(service_name='bedrock-runtime')

messages = [{"role": "user", "content": "Help me build a website"}]

response = bedrock_runtime.invoke_model(
    modelId="us.anthropic.claude-opus-4-6-v1",
    body=json.dumps({
        "anthropic_version": "bedrock-2023-05-31",
        "anthropic_beta": ["compact-2026-01-12"],
        "max_tokens": 4096,
        "messages": messages,
        "context_management": {
            "edits": [
                {
                    "type": "compact_20260112"
                }
            ]
        }
    })
)

response_body = json.loads(response["body"].read())

# Append the response (including any compaction block) to continue the conversation
messages.append({"role": "assistant", "content": response_body["content"]})

for block in response_body["content"]:
    if block.get("type") == "compaction":
        print(f"[COMPACTION]: {block['content'][:200]}...")
    elif block.get("type") == "text":
        print(f"[RESPONSE]: {block['text']}")

TypeScript

import { BedrockRuntimeClient, InvokeModelCommand } from "@aws-sdk/client-bedrock-runtime";

async function main() {
    const client = new BedrockRuntimeClient({});

    const messages: Array<{role: string, content: string | object[]}> = [
        { role: "user", content: "Help me build a website" }
    ];

    const command = new InvokeModelCommand({
        modelId: "us.anthropic.claude-opus-4-6-v1",
        body: JSON.stringify({
            anthropic_version: "bedrock-2023-05-31",
            anthropic_beta: ["compact-2026-01-12"],
            max_tokens: 4096,
            messages,
            context_management: {
                edits: [
                    {
                        type: "compact_20260112"
                    }
                ]
            }
        })
    });

    const response = await client.send(command);
    const responseBody = JSON.parse(new TextDecoder().decode(response.body));

    // Append response to continue conversation
    messages.push({ role: "assistant", content: responseBody.content });

    for (const block of responseBody.content) {
        if (block.type === "compaction") {
            console.log(`[COMPACTION]: ${block.content.substring(0, 200)}...`);
        } else if (block.type === "text") {
            console.log(`[RESPONSE]: ${block.text}`);
        }
    }
}

main().catch(console.error);

Parameters

觸發組態

設定 何時使用 trigger 參數觸發壓縮：

import boto3
import json

bedrock_runtime = boto3.client(service_name='bedrock-runtime')

response = bedrock_runtime.invoke_model(
    modelId="us.anthropic.claude-opus-4-6-v1",
    body=json.dumps({
        "anthropic_version": "bedrock-2023-05-31",
        "anthropic_beta": ["compact-2026-01-12"],
        "max_tokens": 4096,
        "messages": [{"role": "user", "content": "Help me build a website"}],
        "context_management": {
            "edits": [
                {
                    "type": "compact_20260112",
                    "trigger": {
                        "type": "input_tokens",
                        "value": 100000
                    }
                }
            ]
        }
    })
)

response_body = json.loads(response["body"].read())
print(response_body["content"][-1]["text"])

自訂摘要說明

根據預設，壓縮會使用下列摘要提示：

You have written a partial transcript for the initial task above. Please write a summary of the transcript. The purpose of this summary is to provide continuity so you can continue to make progress towards solving the task in a future context, where the raw history above may not be accessible and will be replaced with this summary. Write down anything that would be helpful, including the state, next steps, learnings etc. You must wrap your summary in a <summary></summary> block.

您可以透過 instructions 參數提供自訂指示，以完全取代此提示。自訂指示不會補充預設值；它們會完全取代預設值：

import boto3
import json

bedrock_runtime = boto3.client(service_name='bedrock-runtime')

response = bedrock_runtime.invoke_model(
    modelId="us.anthropic.claude-opus-4-6-v1",
    body=json.dumps({
        "anthropic_version": "bedrock-2023-05-31",
        "anthropic_beta": ["compact-2026-01-12"],
        "max_tokens": 4096,
        "messages": [{"role": "user", "content": "Help me build a website"}],
        "context_management": {
            "edits": [
                {
                    "type": "compact_20260112",
                    "instructions": "Focus on preserving code snippets, variable names, and technical decisions."
                }
            ]
        }
    })
)

response_body = json.loads(response["body"].read())
print(response_body["content"][-1]["text"])

壓縮後暫停

pause_after_compaction 使用 在產生壓縮摘要後暫停 API。這可讓您在 API 繼續回應之前新增其他內容區塊 （例如保留最近的訊息或特定的指令導向訊息）。

啟用時，API 會在產生壓縮區塊後傳回具有compaction停止原因的訊息：

import boto3
import json

bedrock_runtime = boto3.client(service_name='bedrock-runtime')

messages = [{"role": "user", "content": "Help me build a website"}]

response = bedrock_runtime.invoke_model(
    modelId="us.anthropic.claude-opus-4-6-v1",
    body=json.dumps({
        "anthropic_version": "bedrock-2023-05-31",
        "anthropic_beta": ["compact-2026-01-12"],
        "max_tokens": 4096,
        "messages": messages,
        "context_management": {
            "edits": [
                {
                    "type": "compact_20260112",
                    "pause_after_compaction": True
                }
            ]
        }
    })
)

response_body = json.loads(response["body"].read())

# Check if compaction triggered a pause
if response_body.get("stop_reason") == "compaction":
    # Response contains only the compaction block
    messages.append({"role": "assistant", "content": response_body["content"]})

    # Continue the request
    response = bedrock_runtime.invoke_model(
        modelId="us.anthropic.claude-opus-4-6-v1",
        body=json.dumps({
            "anthropic_version": "bedrock-2023-05-31",
            "anthropic_beta": ["compact-2026-01-12"],
            "max_tokens": 4096,
            "messages": messages,
            "context_management": {
                "edits": [{"type": "compact_20260112"}]
            }
        })
    )
    response_body = json.loads(response["body"].read())

print(response_body["content"][-1]["text"])

使用壓縮區塊

觸發壓縮時，API 會在助理回應開始時傳回compaction區塊。

長時間執行的對話可能會導致多次壓縮。最後一個壓縮區塊會反映提示的最終狀態，在提示之前將內容取代為產生的摘要。

{
  "content": [
    {
      "type": "compaction",
      "content": "Summary of the conversation: The user requested help building a web scraper..."
    },
    {
      "type": "text",
      "text": "Based on our conversation so far..."
    }
  ]
}

串流

在啟用壓縮的情況下串流回應時，您將在壓縮開始時收到content_block_start事件。壓縮區塊串流與文字區塊不同。您將會收到content_block_start事件，後面接著一個事件content_block_delta，其中包含完整的摘要內容 （無中繼串流），然後是content_block_stop事件。

提示快取

您可以在壓縮區塊上新增cache_control中斷點，這會快取完整的系統提示以及摘要的內容。會忽略原始壓縮內容。請注意，觸發壓縮時，可能會導致後續請求的快取遺失。

{
    "role": "assistant",
    "content": [
        {
            "type": "compaction",
            "content": "[summary text]",
            "cache_control": {"type": "ephemeral"}
        },
        {
            "type": "text",
            "text": "Based on our conversation..."
        }
    ]
}

了解用量

壓縮需要額外的取樣步驟，這有助於速率限制和計費。API 會在回應中傳回詳細的用量資訊：

{
  "usage": {
    "input_tokens": 45000,
    "output_tokens": 1234,
    "iterations": [
      {
        "type": "compaction",
        "input_tokens": 180000,
        "output_tokens": 3500
      },
      {
        "type": "message",
        "input_tokens": 23000,
        "output_tokens": 1000
      }
    ]
  }
}

iterations 陣列會顯示每次抽樣反覆運算的用量。壓縮發生時，您會看到compaction反覆運算，後面接著主要message反覆運算。最終反覆運算的權杖計數反映壓縮後的有效內容大小。