feat(nvim,telemetry): implement ADR-0102 circuit breaker and ADR-0103 knowledge graph projection

server/src/handlers/meta.rs

@@ -2841,3 +2841,64 @@ mod tests {
         assert!(pre_res.contains("active_tasks"));
     }
 
+    #[tokio::test]
+    async fn test_tech_debt_priority_aware_eviction() {
+        let dir = tempfile::tempdir().unwrap();
+        let state = Arc::new(MemoryState::new(dir.path().to_str().unwrap()));
+        let handler = TechDebtHandler;
+
+        // Populate 300 tech debts: 1 critical, 1 resolved, 298 low
+        state.code.tech_debts.modify(|debts| {
+            debts.push(crate::models::TechDebt {
+                id: "critical-debt".to_string(),
+                namespace: "global".to_string(),
+                description: "Critical security issue".to_string(),
+                severity: Some("critical".to_string()),
+                is_resolved: false,
+                created_at: 100,
+                ..Default::default()
+            });
+            debts.push(crate::models::TechDebt {
+                id: "resolved-debt".to_string(),
+                namespace: "global".to_string(),
+                description: "Old resolved issue".to_string(),
+                severity: Some("high".to_string()),
+                is_resolved: true,
+                created_at: 50,
+                ..Default::default()
+            });
+            for i in 0..298 {
+                debts.push(crate::models::TechDebt {
+                    id: format!("low-debt-{}", i),
+                    namespace: "global".to_string(),
+                    description: format!("Low debt {}", i),
+                    severity: Some("low".to_string()),
+                    is_resolved: false,
+                    created_at: 200 + i,
+                    ..Default::default()
+                });
+            }
+        });
+
+        // Add 301st item: should evict the resolved debt first
+        let res = handler
+            .execute(
+                serde_json::json!({
+                    "action": "log",
+                    "description": "New medium debt",
+                    "severity": "medium"
+                }),
+                state.clone(),
+            )
+            .await
+            .unwrap();
+        assert_eq!(res, "Tech debt logged");
+
+        state.code.tech_debts.read_with(|debts| {
+            assert_eq!(debts.len(), 300);
+            assert!(debts.iter().any(|d| d.id == "critical-debt"), "Critical unresolved debt must be retained");
+            assert!(!debts.iter().any(|d| d.id == "resolved-debt"), "Resolved debt should have been evicted first");
+        });
+    }
+}
+