Struct MemoryNode 

pub struct MemoryNode {

    pub id: MemoryId,
    pub agent_id: AgentId,
    pub user_id: UserId,
    pub memory_type: MemoryType,
    pub embedding: Embedding,
    pub content: String,
    pub created_at: Timestamp,
    pub accessed_at: Timestamp,
    pub access_count: u32,
    pub salience: Salience,
    pub confidence: Confidence,
    pub space_id: SpaceId,
    pub attributes: HashMap<String, AttributeValue>,
    pub tags: Vec<String>,
    pub valid_from: Option<Timestamp>,
    pub valid_until: Option<Timestamp>,
}

A memory node: the atomic unit of knowledge in MenteDB.

Combines vector embeddings, graph connections, temporal properties, and flexible attributes in a single primitive.

Fields

id: MemoryId

Unique identifier.

agent_id: AgentId

The agent that owns this memory.

user_id: UserId

The end user that owns this memory (orthogonal to agent_id).

A memory belongs to both a user and an agent; a scoped query sees it only when it is visible on both axes. Defaults to the nil (shared) user, both for new() and for data written before this field existed.

memory_type: MemoryType

Memory type classification.

embedding: Embedding

Embedding vector for semantic similarity search.

content: String

Human-readable content.

created_at: Timestamp

When this memory was created.

accessed_at: Timestamp

When this memory was last accessed.

access_count: u32

How many times this memory has been accessed.

salience: Salience

Current salience score (decays over time).

confidence: Confidence

Confidence in this memory’s accuracy.

space_id: SpaceId

The memory space this belongs to.

attributes: HashMap<String, AttributeValue>

Flexible key-value attributes.

tags: Vec<String>

Tags for bitmap indexing.

valid_from: Option<Timestamp>

When this fact became true in the real world. None means valid since creation.

valid_until: Option<Timestamp>

When this fact stopped being true. None means still valid.

Implementations

impl MemoryNode

pub fn new( agent_id: AgentId, memory_type: MemoryType, content: String, embedding: Embedding, ) -> Self

Create a new memory node with the given content and embedding.

pub fn with_user_id(self, user_id: UserId) -> Self

Set the owning end user, returning the node (builder style).

Parallels the agent_id constructor argument on the orthogonal user axis. Leave unset (nil) for shared/global memories.

impl MemoryNode

pub fn is_valid_at(&self, at: Timestamp) -> bool

Returns true if this memory is temporally valid at the given timestamp.

pub fn invalidate(&mut self, at: Timestamp)

Mark this memory as no longer valid.

pub fn is_invalidated(&self) -> bool

Returns true if this memory has been invalidated.

Trait Implementations

impl Clone for MemoryNode

fn clone(&self) -> MemoryNode

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MemoryNode

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for MemoryNode

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for MemoryNode

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

where __S: Serializer,

Serialize this value into the given Serde serializer.