#[derive(Debug, thiserror::Error)]
pub enum Error {
#[error("LLM API error ({status}): {body}")]
ApiError { status: u16, body: String },
#[error("Invalid header: {0}")]
InvalidHeader(String),
#[error("Body must be a JSON object")]
InvalidBody,
#[error("HTTP request failed: {0}")]
Http(#[from] reqwest::Error),
#[error("JSON error: {0}")]
Json(#[from] serde_json::Error),
#[error("Expected Assistant message, got: {0}")]
UnexpectedMessage(String),
#[error("{0}")]
Custom(String),
}
pub type Result<T> = std::result::Result<T, Error>;