feat(soul): wire consciousness layers — explicit L0→L1→L2→L3→L1 cycle

routes.el

@@ -34,7 +34,8 @@ fn route_health() -> String {
         + ",\"boot\":" + boot_num
         + ",\"node_count\":" + int_to_str(node_ct)
         + ",\"edge_count\":" + int_to_str(edge_ct)
-        + ",\"pulse\":" + pulse_num + "}"
+        + ",\"pulse\":" + pulse_num
+        + ",\"layers\":{\"l0\":\"core\",\"l1\":\"safety\",\"l2\":\"stewardship\",\"l3\":\"" + imprint_current() + "\"}}"
 }
 
 fn route_lineage() -> String {
@@ -143,10 +144,12 @@ fn handle_dharma_recv(body: String) -> String {
             eff_payload
         }
         let agentic_flag: Bool = json_get_bool(eff_payload, "agentic")
+        let raw_msg: String = json_get(chat_body, "message")
         let reply: String = if agentic_flag {
             handle_chat_agentic(chat_body)
         } else {
-            handle_chat(chat_body)
+            let screened_reply: String = layered_cycle(raw_msg)
+            screened_reply
         }
         auto_persist(chat_body, reply)
         return reply
@@ -319,10 +322,12 @@ fn handle_request(method: String, path: String, body: String) -> String {
         }
         if str_eq(clean, "/api/chat") {
             let agentic_flag: Bool = json_get_bool(body, "agentic")
+            let raw_msg: String = json_get(body, "message")
             let reply: String = if agentic_flag {
                 handle_chat_agentic(body)
             } else {
-                handle_chat(body)
+                let screened_reply: String = layered_cycle(raw_msg)
+                screened_reply
             }
             auto_persist(body, reply)
             return reply

soul.el

@@ -5,6 +5,9 @@ import "chat.el"
 import "studio.el"
 import "elp-input.el"
 import "routes.el"
+import "safety.el"
+import "stewardship.el"
+import "imprint.el"
 
 cgi "neuron-soul" {
     dharma_id: "ntn-genesis@http://localhost:7770",
@@ -229,6 +232,40 @@ fn emit_session_start_event() -> Void {
     println("[soul] session-start event logged (boot=" + boot_num + " nodes=" + int_to_str(node_ct) + " edges=" + int_to_str(edge_ct) + ")")
 }
 
+// layered_cycle — routes user-facing requests through the 4-layer consciousness stack.
+// L0 (core) → L1 (safety screen) → L2 (stewardship) → L3 (imprint) → L1 (safety validate)
+// Internal cognition (heartbeat, proactive, memory ops) bypasses layers — use one_cycle directly.
+fn layered_cycle(raw_input: String) -> String {
+    let history: String = state_get("conversation_history")
+
+    // L1 in: safety screen
+    let screen_result: String = safety_screen(raw_input, history)
+    let screen_action: String = json_get(screen_result, "action")
+
+    // Hard bell: bypass all upper layers, log and escalate
+    if str_eq(screen_action, "hard_bell") {
+        safety_log_bell("hard", json_get(screen_result, "reason"), str_slice(raw_input, 0, 80))
+        return safety_validate("", "hard_bell")
+    }
+
+    // L2: stewardship alignment
+    let screened: String = json_get(screen_result, "content")
+    let imprint_id: String = imprint_current()
+    let steward_result: String = steward_align(screened, imprint_id)
+    let steward_action: String = json_get(steward_result, "action")
+    let guided: String = if str_eq(steward_action, "pass") {
+        json_get(steward_result, "content")
+    } else {
+        json_get(steward_result, "redirect_to")
+    }
+
+    // L3: imprint responds
+    let output: String = imprint_respond(guided, imprint_id)
+
+    // L1 out: validate output before delivery
+    return safety_validate(output, screen_action)
+}
+
 let soul_cgi_id_raw: String = env("SOUL_CGI_ID")
 let soul_cgi_id: String = if str_eq(soul_cgi_id_raw, "") { "ntn-genesis" } else { soul_cgi_id_raw }
 let port_raw: String = env("NEURON_PORT")