Enum AnthropicContentBlock 

pub enum AnthropicContentBlock {
    Text {
        text: String,
        citations: Option<Vec<Value>>,
        cache_control: Option<CacheControl>,
    },
    Image {
        source: AnthropicImageSource,
    },
    ToolUse {
        id: String,
        name: String,
        input: Value,
        cache_control: Option<CacheControl>,
    },
    ToolResult {
        tool_use_id: String,
        content: Option<ToolResultContent>,
        is_error: Option<bool>,
        cache_control: Option<CacheControl>,
    },
    Thinking {
        thinking: String,
        signature: String,
        cache_control: Option<CacheControl>,
    },
    RedactedThinking {
        data: String,
    },
    ServerToolUse {
        id: String,
        name: String,
        input: Value,
    },
    WebSearchToolResult {
        tool_use_id: String,
        content: Value,
    },
    Other(Value),
}

A single content block within a message.

Uses a custom deserializer so that unknown block types (e.g. citations, server_tool_use, redacted_thinking) are captured as Other(Value) instead of causing a hard deserialization failure. This is important because Claude Code may send block types that we don’t yet handle.

Variants

Text

Text content block. May optionally include citations – references to source documents that support the text content. Citations are generated by the model when document/PDF content is provided and citation mode is enabled.

Fields

text: String

citations: Option<Vec<Value>>

cache_control: Option<CacheControl>

Image

Image content block.

Fields

source: AnthropicImageSource

ToolUse

Tool use request from assistant.

Fields

id: String

name: String

input: Value

cache_control: Option<CacheControl>

ToolResult

Tool result from user.

Fields

tool_use_id: String

content: Option<ToolResultContent>

is_error: Option<bool>

cache_control: Option<CacheControl>

Thinking

Thinking content block from assistant (extended thinking / reasoning).

Fields

thinking: String

signature: String

cache_control: Option<CacheControl>

RedactedThinking

Redacted thinking block from assistant. Contains encrypted reasoning data that is opaque to the client but must be passed back verbatim in multi-turn conversations so the model can maintain its chain of thought.

Fields

data: String

ServerToolUse

Server-initiated tool use block. Represents a tool call that the API executes server-side (e.g., web search). The client receives the result via a corresponding web_search_tool_result or similar block.

Fields

id: String

name: String

input: Value

WebSearchToolResult

Result from a server-initiated tool (e.g., web search results). Contains structured content returned by the server-side tool execution.

Fields

tool_use_id: String

content: Value

Other(Value)

Catch-all for unrecognized block types. Preserves the full JSON value so that new Anthropic features don’t break the endpoint and can be round-tripped or inspected.

Trait Implementations

impl Clone for AnthropicContentBlock

fn clone(&self) -> AnthropicContentBlock

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for AnthropicContentBlock

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for AnthropicContentBlock

Custom deserializer for AnthropicContentBlock that handles unknown types gracefully. Since serde’s #[serde(other)] is not supported on internally tagged enums, we deserialize as Value first and dispatch manually.

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for AnthropicContentBlock

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.