Enum Tier 

pub enum Tier {
    Working,
    Episodic,
    Semantic,
    Archival,
}

Lifecycle tier (V8 S5, MEMORY_TYPOLOGY_V8.md §6) — how a memory is served as it ages.

Distinct from MemoryType (what it is cognitively) and from the typology class (crate::typology — which write-gate family it belongs to). Fresh writes land in Tier::Working; the dream cycle is the only tier-transition path (promotion on read, decay-out — §6). Records written before S5 deserialize as Tier::Episodic (the warm default recall surface — today’s serving reality), never as something they were never stamped.

Variants

Working

Hot: current-session working set — briefing-served, decay-out first.

Episodic

Warm: Tantivy-indexed, the default recall surface.

Semantic

Warm knowledge: consolidated, promotion-eligible survivor.

Archival

Cold: sealed archive — explicit queries only.

Implementations

impl Tier

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

String label for JSON / display.

Trait Implementations

impl Clone for Tier

fn clone(&self) -> Tier

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Tier

impl Debug for Tier

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

Formats the value using the given formatter.

impl Default for Tier

fn default() -> Tier

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Tier

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for Tier

impl Hash for Tier

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Tier

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for Tier

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 Tier