elicitation 0.10.0

Conversational elicitation of strongly-typed Rust values via MCP
Documentation 
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//! `reqwest::StatusCode` elicitation (Primitive pattern via StatusCodeValid).

use crate::{
    ElicitCommunicator, ElicitIntrospect, ElicitResult, Elicitation, ElicitationPattern,
    PatternDetails, Prompt, TypeMetadata, mcp, verification::types::StatusCodeValid,
};

crate::default_style!(reqwest::StatusCode => StatusCodeStyle);

impl Prompt for reqwest::StatusCode {
    fn prompt() -> Option<&'static str> {
        Some("Enter HTTP status code (100–999, e.g. 200, 404, 500):")
    }
}

impl Elicitation for reqwest::StatusCode {
    type Style = StatusCodeStyle;

    #[tracing::instrument(skip(communicator))]
    async fn elicit<C: ElicitCommunicator>(communicator: &C) -> ElicitResult<Self> {
        tracing::debug!("Eliciting reqwest::StatusCode via StatusCodeValid");

        let wrapper = StatusCodeValid::elicit(communicator).await?;
        Ok(wrapper.into_inner())
    }

    fn kani_proof() -> proc_macro2::TokenStream {
        crate::verification::proof_helpers::kani_trusted_opaque("status_code")
    }

    fn verus_proof() -> proc_macro2::TokenStream {
        crate::verification::proof_helpers::verus_trusted_opaque("status_code")
    }

    fn creusot_proof() -> proc_macro2::TokenStream {
        crate::verification::proof_helpers::creusot_trusted_opaque("status_code")
    }
}

impl ElicitIntrospect for reqwest::StatusCode {
    fn pattern() -> ElicitationPattern {
        ElicitationPattern::Primitive
    }

    fn metadata() -> TypeMetadata {
        TypeMetadata {
            type_name: "reqwest::StatusCode",
            description: Self::prompt(),
            details: PatternDetails::Primitive,
        }
    }
}

// ── StatusCodeValid Elicitation impl ────────────────────────────────────────

crate::default_style!(StatusCodeValid => StatusCodeValidStyle);

impl Prompt for StatusCodeValid {
    fn prompt() -> Option<&'static str> {
        Some("Enter HTTP status code (100–999):")
    }
}

impl Elicitation for StatusCodeValid {
    type Style = StatusCodeValidStyle;

    #[tracing::instrument(skip(communicator))]
    async fn elicit<C: ElicitCommunicator>(communicator: &C) -> ElicitResult<Self> {
        use crate::{ElicitError, ElicitErrorKind};

        tracing::debug!("Eliciting StatusCodeValid");

        let params = mcp::number_params(
            Self::prompt().unwrap_or("Enter HTTP status code (100–999):"),
            100,
            999,
        );

        let result = communicator
            .call_tool(
                rmcp::model::CallToolRequestParams::new(mcp::tool_names::elicit_number())
                    .with_arguments(params),
            )
            .await?;

        let value = mcp::extract_value(result)?;
        let raw = mcp::parse_integer::<i64>(value)?;
        let code = u16::try_from(raw).map_err(|_| {
            ElicitError::new(ElicitErrorKind::ParseError(format!(
                "Status code out of u16 range: {raw}"
            )))
        })?;

        StatusCodeValid::new(code)
            .map_err(|e| ElicitError::new(ElicitErrorKind::ParseError(e.to_string())))
    }

    fn kani_proof() -> proc_macro2::TokenStream {
        crate::verification::proof_helpers::kani_trusted_opaque("status_code")
    }

    fn verus_proof() -> proc_macro2::TokenStream {
        crate::verification::proof_helpers::verus_trusted_opaque("status_code")
    }

    fn creusot_proof() -> proc_macro2::TokenStream {
        crate::verification::proof_helpers::creusot_trusted_opaque("status_code")
    }
}

impl ElicitIntrospect for StatusCodeValid {
    fn pattern() -> ElicitationPattern {
        ElicitationPattern::Primitive
    }

    fn metadata() -> TypeMetadata {
        TypeMetadata {
            type_name: "StatusCodeValid",
            description: Self::prompt(),
            details: PatternDetails::Primitive,
        }
    }
}