Enum CardTrustPolicy 

#[non_exhaustive]
pub enum CardTrustPolicy {
    Ignore,
    Prefer,
    Require,
}

Trust policy for peer AgentCard signature + URL-origin verification during A2A discovery (A2A 1.0.0 §8.4, #5928).

Mirrors zeph_a2a::discovery::CardTrustPolicy (protocol-crate-facing) as an independent type — zeph-config must not depend on protocol crates, the same reason McpTrustLevel has no zeph-mcp counterpart dependency. Conversion happens in the top-level zeph binary crate (src/tui_remote.rs::convert_card_trust_policy), which constructs the AgentRegistry used before zeph --connect <URL> establishes an A2A session (#6200).

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Ignore

Discover peer cards without checking signatures or URL origin. Default — byte-identical to pre-#5928 behavior.

Prefer

Log a warning on an untrusted/unverifiable card or URL-origin mismatch, but still accept it; reject only an actively tampered signature. Recommended production setting once real-peer interop is proven (see zeph-a2a::card_signing module docs).

Require

Reject any card with an unverifiable signature or a URL-origin mismatch.

Requires the card-signing feature to be compiled in — Config::validate rejects this setting at config-load time otherwise, rather than allowing it to silently degrade or brick discovery at runtime.

Trait Implementations

impl Clone for CardTrustPolicy

fn clone(&self) -> CardTrustPolicy

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for CardTrustPolicy

impl Debug for CardTrustPolicy

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

Formats the value using the given formatter.

impl Default for CardTrustPolicy

fn default() -> CardTrustPolicy

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for CardTrustPolicy

fn deserialize<__D>( __deserializer: __D, ) -> Result<CardTrustPolicy, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for CardTrustPolicy

impl PartialEq for CardTrustPolicy

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for CardTrustPolicy

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for CardTrustPolicy