Procedural macros for claude-api.

Re-exported from the parent crate behind the derive feature; users should write claude_api::derive::Tool, not depend on this crate directly.

#[derive(Tool)]

Derive an implementation of claude_api::tool_dispatch::Tool for a struct that already implements serde::Deserialize and schemars::JsonSchema. The struct's fields define the tool input; the user supplies the behavior via an inherent async fn run(self).

use claude_api::derive::Tool;
use claude_api::tool_dispatch::ToolError;
use serde::Deserialize;
use schemars::JsonSchema;

/// Get the current weather for a city.
#[derive(Deserialize, JsonSchema, Tool)]
struct GetWeather {
    /// City to look up.
    city: String,
}

impl GetWeather {
    async fn run(self) -> Result<serde_json::Value, ToolError> {
        Ok(serde_json::json!({"temp": 72, "city": self.city}))
    }
}

// Use:
let tool = GetWeather::tool();

Attribute syntax

• #[tool(name = "...")] -- override the tool name. Default: snake_case of the type name.
• #[tool(description = "...")] -- override the description. Default: the first line of the struct's doc comment.