feat: add structured memory queries

memoria/crates/memoria-api/src/lib.rs

@@ -238,6 +238,7 @@ pub fn build_router(state: AppState) -> Router {
         .route("/metrics", get(routes::metrics::prometheus_metrics))
         // Memory reads
         .route("/v1/memories", get(routes::memory::list_memories))
+        .route("/v1/memories/query", post(routes::memory::query_memories))
         .route("/v1/memories/retrieve", post(routes::memory::retrieve))
         .route("/v1/memories/search", post(routes::memory::search))
         .route("/v1/memories/:id", get(routes::memory::get_memory))

memoria/crates/memoria-api/src/models.rs

@@ -3,6 +3,7 @@
 
 use memoria_core::{Memory, MemoryType, TrustTier};
 use serde::{Deserialize, Serialize};
+use std::collections::HashMap;
 use std::str::FromStr;
 
 // ── Memory ────────────────────────────────────────────────────────────────────
@@ -20,7 +21,7 @@ pub struct StoreRequest {
     pub source: Option<String>,
     pub branch: Option<String>,
     /// 任意业务元数据（如 scene/agent）。透传落库到 memories.extra_metadata，并在读取时原样
-    /// 返回给调用方；Memoria 本身不对其做检索/打分逻辑（下游消费者如 matrixflow 的 decay 可自行使用）。
+    /// 返回给调用方；结构化 query 可做精确过滤，但不参与相关性检索或打分。
     #[serde(default)]
     pub extra_metadata: Option<std::collections::HashMap<String, serde_json::Value>>,
 }
@@ -67,7 +68,7 @@ fn parse_session_scope(
 fn parse_memory_types_opt(
     types: Option<&Vec<String>>,
 ) -> Result<Option<Vec<MemoryType>>, String> {
-    types
+    let mut parsed = types
         .map(|ts| {
             ts.iter()
                 .map(|s| s.trim())
@@ -76,7 +77,12 @@ fn parse_memory_types_opt(
                 .collect::<Result<Vec<_>, _>>()
         })
         .transpose()
-        .map(|v| v.filter(|t| !t.is_empty()))
+        .map(|v| v.filter(|t| !t.is_empty()))?;
+    if let Some(types) = parsed.as_mut() {
+        let mut seen = std::collections::HashSet::new();
+        types.retain(|memory_type| seen.insert(memory_type.clone()));
+    }
+    Ok(parsed)
 }
 
 impl RetrieveRequest {
@@ -143,6 +149,81 @@ impl SearchRequest {
     }
 }
 
+fn default_structured_query_limit() -> i64 {
+    100
+}
+
+/// A pure structured query. All supplied selectors are combined with AND.
+/// Metadata equality preserves JSON type families (for example, string `"2"`
+/// does not equal number `2`); JSON numbers `2` and `2.0` may compare equal.
+#[derive(Deserialize)]
+#[serde(deny_unknown_fields)]
+pub struct StructuredQueryRequest {
+    #[serde(default)]
+    pub extra_metadata_filter: HashMap<String, serde_json::Value>,
+    pub subject_id: Option<String>,
+    pub memory_types: Option<Vec<String>>,
+    pub session_id: Option<String>,
+    pub trust_tier: Option<String>,
+    pub branch: Option<String>,
+    #[serde(default = "default_structured_query_limit")]
+    pub limit: i64,
+    pub cursor: Option<String>,
+}
+
+impl StructuredQueryRequest {
+    pub fn structured_options(&self) -> Result<memoria_service::StructuredQueryOptions, String> {
+        if !(1..=500).contains(&self.limit) {
+            return Err("limit must be between 1 and 500".to_string());
+        }
+        memoria_storage::validate_extra_metadata_filter(&self.extra_metadata_filter)
+            .map_err(|err| err.to_string())?;
+
+        let subject_id = normalized(self.subject_id.as_deref());
+        let session_id = normalized(self.session_id.as_deref());
+        let normalized_trust_tier = normalized(self.trust_tier.as_deref());
+        let branch = normalized(self.branch.as_deref());
+        let trust_tier = normalized_trust_tier
+            .as_deref()
+            .map(parse_trust_tier)
+            .transpose()?;
+        let memory_types = parse_memory_types_opt(self.memory_types.as_ref())?;
+        if self.extra_metadata_filter.is_empty()
+            && subject_id.is_none()
+            && session_id.is_none()
+            && trust_tier.is_none()
+            && memory_types.is_none()
+            && branch.is_none()
+        {
+            return Err("structured query requires at least one filter selector".to_string());
+        }
+
+        let cursor = normalized(self.cursor.as_deref());
+        if let Some(cursor) = cursor.as_deref() {
+            if cursor.len() != 32 || !cursor.chars().all(|ch| ch.is_ascii_hexdigit()) {
+                return Err("cursor must be a 32-character hexadecimal memory_id".to_string());
+            }
+        }
+
+        Ok(memoria_service::StructuredQueryOptions {
+            limit: self.limit,
+            memory_types,
+            session_id,
+            trust_tier,
+            cursor,
+            subject_id,
+            extra_metadata_filter: self.extra_metadata_filter.clone(),
+        })
+    }
+}
+
+fn normalized(value: Option<&str>) -> Option<String> {
+    value
+        .map(str::trim)
+        .filter(|value| !value.is_empty())
+        .map(str::to_string)
+}
+
 fn deserialize_explain<'de, D: serde::Deserializer<'de>>(d: D) -> Result<String, D::Error> {
     use serde::Deserialize;
     #[derive(Deserialize)]
@@ -285,8 +366,8 @@ pub struct MemoryResponse {
     pub observed_at: Option<String>,
     pub created_at: Option<String>,
     pub retrieval_score: Option<f64>,
-    /// 业务元数据（如 scene/agent）从 memories.extra_metadata 原样透传回给调用方；Memoria 本身
-    /// 不对其做检索/打分逻辑（下游消费者如 matrixflow 的 decay 可自行使用）。
+    /// 业务元数据（如 scene/agent）从 memories.extra_metadata 原样透传回给调用方；结构化 query
+    /// 可做精确过滤，但不参与相关性检索或打分。
     #[serde(skip_serializing_if = "Option::is_none")]
     pub extra_metadata: Option<std::collections::HashMap<String, serde_json::Value>>,
 }
@@ -498,7 +579,23 @@ pub fn parse_trust_tier(s: &str) -> Result<TrustTier, String> {
 
 #[cfg(test)]
 mod tests {
-    use super::{PurgeRequest, PurgeSelector};
+    use super::{parse_memory_types_opt, PurgeRequest, PurgeSelector};
+    use memoria_core::MemoryType;
+
+    #[test]
+    fn memory_type_parser_deduplicates_before_sql_option_construction() {
+        let raw = vec![
+            "semantic".to_string(),
+            " semantic ".to_string(),
+            "profile".to_string(),
+            "semantic".to_string(),
+        ];
+
+        assert_eq!(
+            parse_memory_types_opt(Some(&raw)).unwrap(),
+            Some(vec![MemoryType::Semantic, MemoryType::Profile])
+        );
+    }
 
     #[test]
     fn purge_selector_ignores_empty_arrays() {

memoria/crates/memoria-api/src/routes/memory.rs

@@ -182,6 +182,32 @@ pub async fn list_memories(
     Ok(Json(ListResponse { items, next_cursor }))
 }
 
+pub async fn query_memories(
+    State(state): State<AppState>,
+    auth: AuthUser,
+    Json(req): Json<StructuredQueryRequest>,
+) -> ApiResult<ListResponse> {
+    let branch = normalize_branch(req.branch.clone());
+    let limit = req.limit;
+    let mut options = req
+        .structured_options()
+        .map_err(|err| (StatusCode::UNPROCESSABLE_ENTITY, err))?;
+    options.limit = limit + 1;
+
+    let mut memories = state
+        .service
+        .query_active_structured_on_branch(auth.scope_id(), branch.as_deref(), &options)
+        .await
+        .map_err(api_err_typed)?;
+    let has_more = memories.len() > limit as usize;
+    memories.truncate(limit as usize);
+    let next_cursor = has_more
+        .then(|| memories.last().map(|memory| memory.memory_id.clone()))
+        .flatten();
+    let items = memories.into_iter().map(Into::into).collect();
+    Ok(Json(ListResponse { items, next_cursor }))
+}
+
 pub async fn store_memory(
     State(state): State<AppState>,
     auth: AuthUser,