diff --git a/tests/e2e/src/assertions/mod.rs b/tests/e2e/src/assertions/mod.rs
index bd2531c..cf8d1ae 100644
--- a/tests/e2e/src/assertions/mod.rs
+++ b/tests/e2e/src/assertions/mod.rs
@@ -511,9 +511,9 @@ mod tests {
 
     #[test]
     fn test_embedding_assertions() {
-        let emb1 = vec![1.0f32, 0.0, 0.0];
-        let emb2 = vec![0.9, 0.1, 0.0];
-        let emb3 = vec![0.0, 1.0, 0.0];
+        let emb1 = [1.0f32, 0.0, 0.0];
+        let emb2 = [0.9, 0.1, 0.0];
+        let emb3 = [0.0, 1.0, 0.0];
 
         assert_embeddings_similar!(emb1, emb2, 0.8);
         assert_embeddings_different!(emb1, emb3, 0.5);
diff --git a/tests/e2e/src/mocks/mock_embedding.rs b/tests/e2e/src/mocks/mock_embedding.rs
index 3b0003b..93f0363 100644
--- a/tests/e2e/src/mocks/mock_embedding.rs
+++ b/tests/e2e/src/mocks/mock_embedding.rs
@@ -306,7 +306,7 @@ mod tests {
         let sim = service.cosine_similarity(&emb1, &emb2);
 
         // Cosine similarity should be in [-1, 1]
-        assert!(sim >= -1.0 && sim <= 1.0);
+        assert!((-1.0..=1.0).contains(&sim));
     }
 
     #[test]
diff --git a/tests/e2e/tests/cognitive/neuroscience_tests.rs b/tests/e2e/tests/cognitive/neuroscience_tests.rs
index 1d75a79..5fb2db9 100644
--- a/tests/e2e/tests/cognitive/neuroscience_tests.rs
+++ b/tests/e2e/tests/cognitive/neuroscience_tests.rs
@@ -22,21 +22,19 @@
 use chrono::{Duration, Utc};
 use vestige_core::{
     // Advanced reconsolidation
-    AccessContext, AccessTrigger, LabileState, MemorySnapshot, Modification,
-    ReconsolidatedMemory, ReconsolidationManager, RelationshipType,
+    AccessContext, AccessTrigger, Modification, ReconsolidationManager, RelationshipType,
     // FSRS
-    Rating, retrievability, retrievability_with_decay, initial_difficulty, initial_stability,
-    next_interval, FSRSScheduler, FSRSState,
+    Rating, retrievability, retrievability_with_decay, initial_difficulty,
+    next_interval, FSRSScheduler,
     // Neuroscience - Synaptic Tagging
-    SynapticTaggingSystem, SynapticTag, ImportanceEvent, ImportanceEventType,
-    CaptureWindow, DecayFunction, ImportanceCluster, CapturedMemory,
+    SynapticTaggingSystem, ImportanceEvent, ImportanceEventType,
+    CaptureWindow, DecayFunction,
     // Neuroscience - Memory States
-    MemoryState, MemoryLifecycle, StateTransitionReason, AccessibilityCalculator,
-    CompetitionManager, CompetitionCandidate, StateDecayConfig, StateUpdateService,
-    MemoryStateInfo,
+    MemoryState, MemoryLifecycle, AccessibilityCalculator,
+    CompetitionManager, CompetitionCandidate,
     // Neuroscience - Importance Signals
     ImportanceSignals, NoveltySignal, ArousalSignal, RewardSignal, AttentionSignal,
-    ImportanceContext, AccessPattern, AttentionSession, OutcomeType, CompositeWeights,
+    ImportanceContext, AttentionSession, OutcomeType,
 };
 
 // ============================================================================
@@ -458,7 +456,7 @@ fn test_fsrs_initial_difficulty_order() {
 
     // All within valid bounds (1.0 to 10.0)
     for d in [d_again, d_hard, d_good, d_easy] {
-        assert!(d >= 1.0 && d <= 10.0, "Difficulty {} out of bounds", d);
+        assert!((1.0..=10.0).contains(&d), "Difficulty {} out of bounds", d);
     }
 }
 
diff --git a/tests/e2e/tests/cognitive/psychology_tests.rs b/tests/e2e/tests/cognitive/psychology_tests.rs
index a464ae4..d89aaed 100644
--- a/tests/e2e/tests/cognitive/psychology_tests.rs
+++ b/tests/e2e/tests/cognitive/psychology_tests.rs
@@ -9,7 +9,6 @@
 use vestige_core::neuroscience::spreading_activation::{
     ActivationConfig, ActivationNetwork, LinkType,
 };
-use std::collections::HashSet;
 
 // ============================================================================
 // SERIAL POSITION EFFECT TESTS (5 tests)
diff --git a/tests/e2e/tests/extreme/adversarial_tests.rs b/tests/e2e/tests/extreme/adversarial_tests.rs
index 0bc1f0e..2fcc042 100644
--- a/tests/e2e/tests/extreme/adversarial_tests.rs
+++ b/tests/e2e/tests/extreme/adversarial_tests.rs
@@ -14,14 +14,9 @@
 use vestige_core::neuroscience::spreading_activation::{
     ActivationConfig, ActivationNetwork, LinkType,
 };
-use vestige_core::neuroscience::synaptic_tagging::{
-    CaptureWindow, ImportanceEvent, ImportanceEventType, SynapticTaggingSystem,
-};
-use vestige_core::neuroscience::hippocampal_index::{
-    BarcodeGenerator, HippocampalIndex,
-};
+use vestige_core::neuroscience::synaptic_tagging::SynapticTaggingSystem;
+use vestige_core::neuroscience::hippocampal_index::HippocampalIndex;
 use chrono::Utc;
-use std::collections::HashSet;
 
 // ============================================================================
 // MALFORMED INPUT HANDLING (2 tests)
diff --git a/tests/e2e/tests/extreme/chaos_tests.rs b/tests/e2e/tests/extreme/chaos_tests.rs
index 0b3a760..86f1dd6 100644
--- a/tests/e2e/tests/extreme/chaos_tests.rs
+++ b/tests/e2e/tests/extreme/chaos_tests.rs
@@ -22,7 +22,6 @@ use vestige_core::neuroscience::synaptic_tagging::{
 use vestige_core::neuroscience::hippocampal_index::{
     HippocampalIndex, IndexQuery,
 };
-use std::collections::HashSet;
 
 // ============================================================================
 // RANDOM OPERATION SEQUENCE TESTS (2 tests)
diff --git a/tests/e2e/tests/extreme/mathematical_tests.rs b/tests/e2e/tests/extreme/mathematical_tests.rs
index 1b6e970..7a9aadc 100644
--- a/tests/e2e/tests/extreme/mathematical_tests.rs
+++ b/tests/e2e/tests/extreme/mathematical_tests.rs
@@ -107,7 +107,7 @@ fn test_math_edge_weight_multiplication() {
     let mut network = ActivationNetwork::with_config(config);
 
     // Create edges with different weights
-    let test_weights = vec![0.1, 0.25, 0.5, 0.75, 1.0];
+    let test_weights = [0.1, 0.25, 0.5, 0.75, 1.0];
 
     for (i, &weight) in test_weights.iter().enumerate() {
         network.add_edge(
@@ -349,7 +349,7 @@ fn test_math_embedding_dimensions() {
     // Compression ratio should be reasonable
     let compression_ratio = 384.0 / INDEX_EMBEDDING_DIM as f64;
     assert!(
-        compression_ratio >= 2.0 && compression_ratio <= 4.0,
+        (2.0..=4.0).contains(&compression_ratio),
         "Compression ratio should be 2-4x: {:.2}x",
         compression_ratio
     );
diff --git a/tests/e2e/tests/extreme/research_validation_tests.rs b/tests/e2e/tests/extreme/research_validation_tests.rs
index 1064abc..2fe7716 100644
--- a/tests/e2e/tests/extreme/research_validation_tests.rs
+++ b/tests/e2e/tests/extreme/research_validation_tests.rs
@@ -18,7 +18,7 @@ use vestige_core::neuroscience::synaptic_tagging::{
     SynapticTaggingSystem,
 };
 use vestige_core::neuroscience::hippocampal_index::{
-    HippocampalIndex, HippocampalIndexConfig, IndexQuery, INDEX_EMBEDDING_DIM,
+    HippocampalIndex, HippocampalIndexConfig, IndexQuery,
 };
 use std::collections::HashSet;
 
diff --git a/tests/e2e/tests/journeys/consolidation_workflow.rs b/tests/e2e/tests/journeys/consolidation_workflow.rs
index 5240506..6577c89 100644
--- a/tests/e2e/tests/journeys/consolidation_workflow.rs
+++ b/tests/e2e/tests/journeys/consolidation_workflow.rs
@@ -16,11 +16,10 @@ use chrono::{Duration, Utc};
 use vestige_core::{
     advanced::dreams::{
         ActivityTracker, ConnectionGraph, ConnectionReason, ConsolidationScheduler,
-        DreamConfig, DreamMemory, InsightType, MemoryDreamer,
+        DreamConfig, DreamMemory, MemoryDreamer,
     },
     consolidation::SleepConsolidation,
 };
-use std::collections::HashSet;
 
 // ============================================================================
 // HELPER FUNCTIONS
diff --git a/tests/e2e/tests/journeys/import_export.rs b/tests/e2e/tests/journeys/import_export.rs
index e66c941..fbea1ba 100644
--- a/tests/e2e/tests/journeys/import_export.rs
+++ b/tests/e2e/tests/journeys/import_export.rs
@@ -290,13 +290,11 @@ fn test_roundtrip_preserves_all_data() {
 #[test]
 fn test_selective_export_by_tags() {
     // Create memories with different tags
-    let memories = vec![
-        ExportedMemory::new("Rust ownership", "concept", vec!["rust", "memory"]),
+    let memories = [ExportedMemory::new("Rust ownership", "concept", vec!["rust", "memory"]),
         ExportedMemory::new("Python generators", "concept", vec!["python", "generators"]),
         ExportedMemory::new("Rust borrowing", "concept", vec!["rust", "borrowing"]),
         ExportedMemory::new("JavaScript async", "concept", vec!["javascript", "async"]),
-        ExportedMemory::new("Rust async", "concept", vec!["rust", "async"]),
-    ];
+        ExportedMemory::new("Rust async", "concept", vec!["rust", "async"])];
 
     // Filter by "rust" tag
     let rust_memories: Vec<_> = memories
diff --git a/tests/e2e/tests/journeys/intentions_workflow.rs b/tests/e2e/tests/journeys/intentions_workflow.rs
index d873b4a..a9b2b8a 100644
--- a/tests/e2e/tests/journeys/intentions_workflow.rs
+++ b/tests/e2e/tests/journeys/intentions_workflow.rs
@@ -12,10 +12,9 @@
 //! 4. System proactively suggests relevant memories
 //! 5. User benefits from context-aware assistance
 
-use chrono::Utc;
 use vestige_core::advanced::intent::{
     ActionType, DetectedIntent, IntentDetector, LearningLevel, MaintenanceType,
-    OptimizationType, ReviewDepth, UserAction,
+    OptimizationType, UserAction,
 };
 
 // ============================================================================
@@ -84,7 +83,7 @@ fn test_debugging_intent_detection() {
 
     // Verify evidence is captured
     assert!(
-        result.evidence.len() > 0 || result.confidence == 0.0,
+        !result.evidence.is_empty() || result.confidence == 0.0,
         "Should capture evidence if intent detected"
     );
 
diff --git a/tests/e2e/tests/mcp/protocol_tests.rs b/tests/e2e/tests/mcp/protocol_tests.rs
index 7c616e1..20bed76 100644
--- a/tests/e2e/tests/mcp/protocol_tests.rs
+++ b/tests/e2e/tests/mcp/protocol_tests.rs
@@ -119,7 +119,7 @@ fn test_standard_jsonrpc_error_codes() {
 
     for (code, message) in error_codes {
         // All standard codes are in the reserved range
-        assert!(code <= -32600 && code >= -32700,
+        assert!((-32700..=-32600).contains(&code),
             "Standard error code {} ({}) must be in reserved range", code, message);
     }
 }
@@ -142,7 +142,7 @@ fn test_mcp_specific_error_codes() {
 
     for (code, name) in mcp_error_codes {
         // MCP-specific codes are in the server error range
-        assert!(code >= -32099 && code <= -32000,
+        assert!((-32099..=-32000).contains(&code),
             "MCP error code {} ({}) must be in server error range", code, name);
     }
 }
diff --git a/tests/e2e/tests/mcp/tool_tests.rs b/tests/e2e/tests/mcp/tool_tests.rs
index be01425..4eaaa17 100644
--- a/tests/e2e/tests/mcp/tool_tests.rs
+++ b/tests/e2e/tests/mcp/tool_tests.rs
@@ -325,7 +325,7 @@ fn test_mark_reviewed_with_rating() {
 
     // Rating values: 1=Again, 2=Hard, 3=Good, 4=Easy
     let rating = tool_call["arguments"]["rating"].as_i64().unwrap();
-    assert!(rating >= 1 && rating <= 4, "Rating must be 1-4");
+    assert!((1..=4).contains(&rating), "Rating must be 1-4");
 
     let expected_response = json!({
         "content": [{
@@ -356,7 +356,7 @@ fn test_mark_reviewed_invalid_rating() {
 
         // Rating should be validated
         let r = tool_call["arguments"]["rating"].as_i64().unwrap();
-        assert!(r < 1 || r > 4, "Rating {} should be invalid", r);
+        assert!(!(1..=4).contains(&r), "Rating {} should be invalid", r);
     }
 }