CacheAligner (180 LOC, 8 tests): - Detects dynamic patterns: timestamps, UUIDs, session IDs, temp paths, SHAs - Uses once_cell Lazy statics + Regex for pattern matching - Separates stable prefix (cache-able) from dynamic tail (varies) - Reports drift metrics (0.0-1.0 ratio of dynamic content) - Preserves identical prefixes across calls for KV cache hits CcrStore (170 LOC, 10 tests): - LRU cache with IndexMap (preserves insertion order) - SHA256 hashing for content identification - TTL-based expiry (default 1hr, configurable) - Thread-safe (Mutex-wrapped) - Supports large content (tested 100KB+) ContextOptimizer integration (2 tests): - Wired CCR store into optimizer - Stores originals when compression occurs + CCR enabled - Returns hash for retrieval hints 50 optimizer tests total: Phase 1 (17) + Phase 2 (15) + Phase 3 (18) = 50 passing