ainl_memory/

lib.rs

//! AINL Memory - Graph-based agent memory substrate
//!
//! **Graph-as-memory for AI agents. Execution IS the memory.**
//!
//! AINL Memory implements agent memory as an execution graph. Every agent turn,
//! tool call, and delegation becomes a typed graph node. No separate retrieval
//! layer—the graph itself is the memory.
//!
//! # Quick Start
//!
//! ```no_run
//! use ainl_memory::GraphMemory;
//! use std::path::Path;
//!
//! let memory = GraphMemory::new(Path::new("memory.db")).unwrap();
//!
//! // Record an episode
//! memory.write_episode(
//!     vec!["file_read".to_string(), "agent_delegate".to_string()],
//!     Some("agent-B".to_string()),
//!     None,
//! ).unwrap();
//!
//! // Recall recent episodes
//! let recent = memory.recall_recent(100).unwrap();
//! ```
//!
//! # Architecture
//!
//! AINL Memory is designed as infrastructure that any agent framework can adopt:
//! - Zero dependencies on specific agent runtimes
//! - Simple trait-based API via `GraphStore`
//! - Bring your own storage backend
//!
//! ## Node Types
//!
//! - **Episode**: What happened during an agent turn (tool calls, delegations)
//! - **Semantic**: Facts learned with confidence scores
//! - **Procedural**: Reusable compiled workflow patterns
//! - **Persona**: Agent traits learned over time

pub mod node;
pub mod query;
pub mod store;

pub use node::{AinlEdge, AinlMemoryNode, AinlNodeType};
pub use query::{find_high_confidence_facts, find_patterns, find_strong_traits, recall_recent, walk_from};
pub use store::{GraphStore, SqliteGraphStore};

use uuid::Uuid;

/// High-level graph memory API - the main entry point for AINL memory.
///
/// Wraps a GraphStore implementation with a simplified 5-method API.
pub struct GraphMemory {
    store: SqliteGraphStore,
}

impl GraphMemory {
    /// Create a new graph memory at the given database path.
    ///
    /// This will create the database file if it doesn't exist, and
    /// ensure the AINL graph schema is initialized.
    pub fn new(db_path: &std::path::Path) -> Result<Self, String> {
        let store = SqliteGraphStore::open(db_path)?;
        Ok(Self { store })
    }

    /// Create from an existing SQLite connection (for integration with existing memory pools)
    pub fn from_connection(conn: rusqlite::Connection) -> Result<Self, String> {
        let store = SqliteGraphStore::from_connection(conn)?;
        Ok(Self { store })
    }

    /// Write an episode node (what happened during an agent turn).
    ///
    /// # Arguments
    /// * `tool_calls` - List of tools executed during this turn
    /// * `delegation_to` - Agent ID this turn delegated to (if any)
    /// * `trace_event` - Optional orchestration trace event (serialized JSON)
    ///
    /// # Returns
    /// The ID of the created episode node
    pub fn write_episode(
        &self,
        tool_calls: Vec<String>,
        delegation_to: Option<String>,
        trace_event: Option<serde_json::Value>,
    ) -> Result<Uuid, String> {
        let turn_id = Uuid::new_v4();
        let timestamp = chrono::Utc::now().timestamp();

        let node = AinlMemoryNode::new_episode(
            turn_id,
            timestamp,
            tool_calls,
            delegation_to,
            trace_event,
        );

        let node_id = node.id;
        self.store.write_node(&node)?;
        Ok(node_id)
    }

    /// Write a semantic fact (learned information with confidence).
    ///
    /// # Arguments
    /// * `fact` - The fact in natural language
    /// * `confidence` - Confidence score (0.0-1.0)
    /// * `source_turn_id` - Turn ID that generated this fact
    ///
    /// # Returns
    /// The ID of the created semantic node
    pub fn write_fact(
        &self,
        fact: String,
        confidence: f32,
        source_turn_id: Uuid,
    ) -> Result<Uuid, String> {
        let node = AinlMemoryNode::new_fact(fact, confidence, source_turn_id);
        let node_id = node.id;
        self.store.write_node(&node)?;
        Ok(node_id)
    }

    /// Store a procedural pattern (compiled workflow).
    ///
    /// # Arguments
    /// * `pattern_name` - Name/identifier for the pattern
    /// * `compiled_graph` - Binary representation of the compiled graph
    ///
    /// # Returns
    /// The ID of the created procedural node
    pub fn store_pattern(
        &self,
        pattern_name: String,
        compiled_graph: Vec<u8>,
    ) -> Result<Uuid, String> {
        let node = AinlMemoryNode::new_pattern(pattern_name, compiled_graph);
        let node_id = node.id;
        self.store.write_node(&node)?;
        Ok(node_id)
    }

    /// Recall recent episodes (within the last N seconds).
    ///
    /// # Arguments
    /// * `seconds_ago` - Only return episodes from the last N seconds
    ///
    /// # Returns
    /// Vector of episode nodes, most recent first
    pub fn recall_recent(&self, seconds_ago: i64) -> Result<Vec<AinlMemoryNode>, String> {
        let since = chrono::Utc::now().timestamp() - seconds_ago;
        self.store.query_episodes_since(since, 100)
    }

    /// Get direct access to the underlying store for advanced queries
    pub fn store(&self) -> &dyn GraphStore {
        &self.store
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_graph_memory_api() {
        let temp_dir = std::env::temp_dir();
        let db_path = temp_dir.join("ainl_lib_test.db");
        let _ = std::fs::remove_file(&db_path);

        let memory = GraphMemory::new(&db_path).expect("Failed to create memory");

        // Write an episode
        let episode_id = memory
            .write_episode(
                vec!["file_read".to_string(), "agent_delegate".to_string()],
                Some("agent-B".to_string()),
                None,
            )
            .expect("Failed to write episode");

        assert_ne!(episode_id, Uuid::nil());

        // Write a fact
        let fact_id = memory
            .write_fact(
                "User prefers concise responses".to_string(),
                0.85,
                episode_id,
            )
            .expect("Failed to write fact");

        assert_ne!(fact_id, Uuid::nil());

        // Recall recent episodes
        let recent = memory.recall_recent(60).expect("Failed to recall");
        assert_eq!(recent.len(), 1);

        // Verify the episode content
        if let AinlNodeType::Episode {
            delegation_to,
            tool_calls,
            ..
        } = &recent[0].node_type
        {
            assert_eq!(delegation_to, &Some("agent-B".to_string()));
            assert_eq!(tool_calls.len(), 2);
        } else {
            panic!("Wrong node type");
        }
    }

    #[test]
    fn test_store_pattern() {
        let temp_dir = std::env::temp_dir();
        let db_path = temp_dir.join("ainl_lib_test_pattern.db");
        let _ = std::fs::remove_file(&db_path);

        let memory = GraphMemory::new(&db_path).expect("Failed to create memory");

        let pattern_id = memory
            .store_pattern("research_workflow".to_string(), vec![1, 2, 3, 4])
            .expect("Failed to store pattern");

        assert_ne!(pattern_id, Uuid::nil());

        // Query it back
        let patterns = find_patterns(memory.store(), "research").expect("Query failed");
        assert_eq!(patterns.len(), 1);
    }
}