diff --git a/src/workers/continuum-core/src/persona/mod.rs b/src/workers/continuum-core/src/persona/mod.rs
index fc6d131e0..2022f86ac 100644
--- a/src/workers/continuum-core/src/persona/mod.rs
+++ b/src/workers/continuum-core/src/persona/mod.rs
@@ -36,6 +36,7 @@ pub mod trace;
 pub mod resource_forecast;
 pub mod response;
 pub mod self_task_generator;
+pub mod service_module;
 pub mod text_analysis;
 pub mod turn_context;
 pub mod turn_frame;
diff --git a/src/workers/continuum-core/src/persona/service_module.rs b/src/workers/continuum-core/src/persona/service_module.rs
new file mode 100644
index 000000000..a4390f422
--- /dev/null
+++ b/src/workers/continuum-core/src/persona/service_module.rs
@@ -0,0 +1,151 @@
+//! `PersonaServiceModule` — singleton Rust `ServiceModule` for persona
+//! work. **L0-1 minimum unit** of [GRID-MIGRATION-ROADMAP].
+//!
+//! ## Scope discipline
+//!
+//! L0-1 ships only what L0-1 needs: a registered module that responds
+//! to `persona/status`. Enrollment, cognition dispatch, channel
+//! ownership, and the circuit breaker all live with the layers that
+//! wire them to real work (L0-2..L0-4), shipped alongside deletion of
+//! their TS counterparts in the same PRs.
+//!
+//! No fallbacks here. Calling `persona/enroll` returns a loud error
+//! until L0-2 wires cognition dispatch.
+
+use std::any::Any;
+use std::time::Duration;
+
+use async_trait::async_trait;
+use serde_json::{json, Value};
+
+use crate::runtime::service_module::{CommandResult, ModuleConfig, ModulePriority, ServiceModule};
+use crate::runtime::ModuleContext;
+
+/// Singleton owning persona work in-process. Replaces the TS
+/// `PersonaAutonomousLoop`; the deletion of `PersonaAutonomousLoop.ts`
+/// lands with L0-2 once cognition dispatch is wired here.
+pub struct PersonaServiceModule;
+
+impl PersonaServiceModule {
+    pub fn new() -> Self {
+        Self
+    }
+}
+
+impl Default for PersonaServiceModule {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+#[async_trait]
+impl ServiceModule for PersonaServiceModule {
+    fn config(&self) -> ModuleConfig {
+        ModuleConfig {
+            name: "persona",
+            priority: ModulePriority::High,
+            command_prefixes: &["persona/"],
+            event_subscriptions: &[],
+            needs_dedicated_thread: false,
+            max_concurrency: 1,
+            tick_interval: Some(Duration::from_millis(250)),
+        }
+    }
+
+    async fn initialize(&self, _ctx: &ModuleContext) -> Result<(), String> {
+        Ok(())
+    }
+
+    async fn handle_command(
+        &self,
+        command: &str,
+        _params: Value,
+    ) -> Result<CommandResult, String> {
+        match command {
+            "persona/status" => Ok(CommandResult::Json(json!({
+                "module": "persona",
+                "enrolled": 0,
+                "scope": "L0-1: status-only; enroll wired in L0-2",
+            }))),
+            "persona/enroll" => Err(
+                "persona/enroll requires cognition dispatch (L0-2 — card 7a45a15f); \
+                 not yet wired"
+                    .to_string(),
+            ),
+            other => Err(format!("unknown persona command: {other}")),
+        }
+    }
+
+    async fn tick(&self) -> Result<(), String> {
+        // L0-1: no personas to service. L0-2 wires the per-persona
+        // `channel_registry::service_cycle()` dispatch here.
+        Ok(())
+    }
+
+    fn as_any(&self) -> &dyn Any {
+        self
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn config_declares_persona_prefix_and_high_priority() {
+        let m = PersonaServiceModule::new();
+        let cfg = m.config();
+        assert_eq!(cfg.name, "persona");
+        assert_eq!(cfg.priority, ModulePriority::High);
+        assert_eq!(cfg.command_prefixes, &["persona/"]);
+        assert_eq!(cfg.tick_interval, Some(Duration::from_millis(250)));
+    }
+
+    #[tokio::test]
+    async fn status_command_succeeds_and_reports_l0_1_scope() {
+        let m = PersonaServiceModule::new();
+        let result = m
+            .handle_command("persona/status", Value::Null)
+            .await
+            .expect("status succeeds");
+        let CommandResult::Json(v) = result else {
+            panic!("expected Json result")
+        };
+        assert_eq!(v["module"], "persona");
+        assert_eq!(v["enrolled"], 0);
+        assert!(v["scope"].as_str().unwrap().contains("L0-1"));
+    }
+
+    #[tokio::test]
+    async fn enroll_command_fails_loud_until_l0_2_card_7a45a15f() {
+        let m = PersonaServiceModule::new();
+        let err = m
+            .handle_command("persona/enroll", json!({"persona_id": "x"}))
+            .await
+            .expect_err("enroll must fail loud — no fallback semantics");
+        assert!(
+            err.contains("L0-2"),
+            "error must name the gating layer; got: {err}"
+        );
+        assert!(
+            err.contains("7a45a15f"),
+            "error must name the gating card so it's grep-able; got: {err}"
+        );
+    }
+
+    #[tokio::test]
+    async fn unknown_command_returns_clear_error() {
+        let m = PersonaServiceModule::new();
+        let err = m
+            .handle_command("persona/teleport", Value::Null)
+            .await
+            .expect_err("unknown commands must error, not fall back");
+        assert!(err.contains("persona/teleport"), "error names the command");
+    }
+
+    #[tokio::test]
+    async fn tick_succeeds_quietly_with_no_enrolled_personas() {
+        let m = PersonaServiceModule::new();
+        m.tick().await.expect("empty tick succeeds");
+    }
+}