tokenfold-core 0.2.0

Token-aware compression for LLM payloads: shrink JSON tool-call bodies, command output, and diffs with exact tiktoken accounting and a typed safety report.
Documentation 
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#[derive(Debug, thiserror::Error)]
pub enum TokenFoldError {
    #[error("invalid input: {0}")]
    InvalidInput(String),
    #[error("safety violation: {0}")]
    SafetyViolation(String),
    #[error("redaction failed: {0}")]
    RedactionFailed(String),
    #[error("estimator error: {0}")]
    EstimatorError(String),
    #[error("config error: {0}")]
    ConfigError(String),
    #[error("internal error: {0}")]
    InternalError(String),
    #[error("io error: {0}")]
    Io(#[from] std::io::Error),
}

impl TokenFoldError {
    /// CLI exit code per the Error Taxonomy table (PLAN.md / INTERFACES.md ยง1.4).
    pub fn exit_code(&self) -> i32 {
        match self {
            TokenFoldError::InvalidInput(_) => 2,
            TokenFoldError::SafetyViolation(_) | TokenFoldError::RedactionFailed(_) => 3,
            TokenFoldError::EstimatorError(_) => 4,
            TokenFoldError::ConfigError(_) => 5,
            TokenFoldError::InternalError(_) | TokenFoldError::Io(_) => 6,
        }
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn exit_codes_match_error_taxonomy_table() {
        assert_eq!(TokenFoldError::InvalidInput("x".into()).exit_code(), 2);
        assert_eq!(TokenFoldError::SafetyViolation("x".into()).exit_code(), 3);
        assert_eq!(TokenFoldError::RedactionFailed("x".into()).exit_code(), 3);
        assert_eq!(TokenFoldError::EstimatorError("x".into()).exit_code(), 4);
        assert_eq!(TokenFoldError::ConfigError("x".into()).exit_code(), 5);
        assert_eq!(TokenFoldError::InternalError("x".into()).exit_code(), 6);
        let io_err = TokenFoldError::from(std::io::Error::other("x"));
        assert_eq!(io_err.exit_code(), 6);
    }
}