Update typing for Amazon Bedrock Provider Options to include cache points

[dayvidwang]

Description

Setting cache control breakpoints is available for the amazon bedrock provider, as shown here: https://ai-sdk.dev/providers/ai-sdk-providers/amazon-bedrock#cache-points

The method is by setting the cachePoint property on a message via providerOptions

const result = await generateText({
  model: bedrock('anthropic.claude-3-5-sonnet-20241022-v2:0'),
  messages: [
    {
      role: 'system',
      content: `You are an expert on William Gibson's cyberpunk literature and themes. You have access to the following academic analysis: ${cyberpunkAnalysis}`,
      providerOptions: {
        bedrock: { cachePoint: { type: 'default' } },
      },
    },
    {
      role: 'user',
      content:
        'What are the key cyberpunk themes that Gibson explores in Neuromancer?',
    },
  ],
});

However, the actual BedrockProviderOptions type does not contain the cachePoint field:

In contrast, you can look at the AnthropicProviderOptions, which does contain cache control fields

This is pretty helpful for just being able to set a type on the provider options, and I would appreciate if it was included in the SDK by default.

AI SDK Version

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