feat(M1.3.2): Task 1 - Create state_machine module stub with MimiState enum and StateManager (#209)

Author: LyeZinho

crates/mimi-core/src/lib.rs

@@ -8,10 +8,12 @@ pub mod error;
 pub mod message;
 pub mod routing;
 pub mod serialization;
+pub mod state_machine;
 
 pub use error::{Error, Result};
 pub use routing::{MessageRouter, RoutingError, Topic, TopicPattern};
 pub use serialization::{MessageSerializer, SerializationError};
+pub use state_machine::{MimiState, StateManager};
 
 /// Core version
 pub const VERSION: &str = env!("CARGO_PKG_VERSION");

crates/mimi-core/src/state_machine.rs

@@ -0,0 +1,56 @@
+//! Mimi State Machine FSM
+//!
+//! Implements the 10-state finite state machine for Mimi orchestrator core lifecycle.
+//! Provides async execution, guard conditions, error recovery, and message bus integration.
+
+use std::sync::{Arc, Mutex};
+
+/// Mimi system states
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub enum MimiState {
+    /// System idle, waiting for input
+    Idle,
+    /// Listening for user commands via Zenoh
+    Listening,
+    /// Processing intent classification
+    Processing,
+    /// Executing task via workers
+    Executing,
+    /// Generating response via Liliana
+    Responding,
+    /// Degraded mode (partial functionality)
+    Degraded,
+    /// Recovering from failure
+    Recovering,
+    /// Component failure detected
+    FailedComponent,
+    /// Critical error requiring intervention
+    CriticalError,
+    /// System shutdown in progress
+    Shutdown,
+}
+
+/// State manager with thread-safe access
+pub struct StateManager {
+    state: Arc<Mutex<MimiState>>,
+}
+
+impl StateManager {
+    /// Create new state manager starting in Idle state
+    pub fn new() -> Self {
+        Self {
+            state: Arc::new(Mutex::new(MimiState::Idle)),
+        }
+    }
+
+    /// Get current state
+    pub fn current_state(&self) -> MimiState {
+        *self.state.lock().unwrap()
+    }
+}
+
+impl Default for StateManager {
+    fn default() -> Self {
+        Self::new()
+    }
+}

crates/mimi-core/tests/state_machine_tests.rs

@@ -0,0 +1,10 @@
+//! State Machine Unit Tests
+
+use mimi_core::state_machine::{MimiState, StateManager};
+
+#[test]
+fn test_initial_state_is_idle() {
+    // This will fail because StateManager doesn't exist yet
+    let manager = StateManager::new();
+    assert_eq!(manager.current_state(), MimiState::Idle);
+}