Enum MetaKey 

pub enum MetaKey {
    Ext,
    Seed,
}

Which out-of-band system-metadata map a PayloadItem::Meta carries.

$ext and $seed are the same shape — an opaque Map<String, Value> that never reaches the plate JSON and round-trips through Markdown and the storage DTO — so the live model represents them as one variant discriminated by this key. They differ only in their canonical sort rank, whether they are root-only, and (downstream of storage) whether the seeding layer interprets them: $ext is opaque; $seed is read by crate::SeedOverlay::from_json.

Variants

Ext

$ext — opaque out-of-band consumer state (editor renames, agent annotations). Allowed on any card.

Seed

$seed — per-card-kind seed overlays. Root-only (like $quill).

Implementations

impl MetaKey

pub fn as_str(self) -> &'static str

The literal source key ("$ext" / "$seed").

pub fn from_key_str(key: &str) -> Option<Self>

Parse the source key ("$ext" / "$seed"), or None for any other key.

pub fn is_root_only(self) -> bool

true when the key may appear on the root card only (rejected on composable cards), like $quill.

Trait Implementations

impl Clone for MetaKey

fn clone(&self) -> MetaKey

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for MetaKey

impl Debug for MetaKey

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

Formats the value using the given formatter.

impl Eq for MetaKey

impl PartialEq for MetaKey

fn eq(&self, other: &MetaKey) -> 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 StructuralPartialEq for MetaKey