Enum ProtocolMode 

pub enum ProtocolMode {
    Auto,
    ModernOnly,
    LegacyOnly,
}

Runtime protocol selection policy.

Variants

Auto

Prefer MCP 2026-07-28 and fall back only when discovery is explicitly rejected as an unknown method.

ModernOnly

Require MCP 2026-07-28. Never downgrade.

LegacyOnly

Use the MCP 2025-11-25 initialize lifecycle byte-for-byte.

Trait Implementations

impl Clone for ProtocolMode

fn clone(&self) -> ProtocolMode

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ProtocolMode

impl Debug for ProtocolMode

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

Formats the value using the given formatter.

impl Default for ProtocolMode

fn default() -> ProtocolMode

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for ProtocolMode

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for ProtocolMode

impl PartialEq for ProtocolMode

fn eq(&self, other: &ProtocolMode) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for ProtocolMode

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for ProtocolMode