Changelog¶

All notable changes to anchor are documented here. The format is based on Keep a Changelog, and the project adheres to Semantic Versioning.

[Unreleased]¶

Unit tests for _math.py (cosine_similarity and clamp functions)
MemoryRetrieverAdapter tests verifying Retriever protocol compliance
PipelineExecutionError wrapping test with diagnostics verification
Golden path integration test mirroring README usage pattern
Example: examples/hybrid_rag.py -- hybrid RAG pipeline with dense retrieval
Example: examples/custom_retriever.py -- custom Retriever protocol implementation
Example: examples/budget_management.py -- token budget management and overflow handling
README sections for Priority System (1--10 scale) and Token Budgets

test_consolidator.py: eliminated shared mutable state (_orthogonal_index dict) by converting to factory function pattern (make_orthogonal_embed())
test_graph_memory.py: updated link_memory unknown entity test to expect KeyError instead of ValueError
README: fixed retrieval example with runnable embed_fn and ContextItem creation
README: updated test count from 961 to 1088

Core context pipeline with sync/async support (ContextPipeline)
Token-aware sliding window memory (SlidingWindowMemory)
Summary buffer memory with progressive compaction (SummaryBufferMemory)
Memory manager facade unifying conversation and persistent memory (MemoryManager)
Hybrid RAG retrieval: dense, sparse (BM25), and hybrid (RRF) retrievers
Multi-signal memory retrieval with recency/relevance/importance scoring (ScoredMemoryRetriever)
Provider-agnostic formatting: Anthropic, OpenAI, and generic text formatters
Anthropic multi-block system formatting with prompt caching support
Protocol-based extensibility (PEP 544) for all extension points
Token budget management with per-source allocations and overflow tracking
Pluggable eviction policies: FIFO, importance-based, and paired (user+assistant)
Memory decay: Ebbinghaus forgetting curve and linear decay
Recency scoring: exponential and linear strategies
Memory consolidation with content-hash dedup and cosine-similarity merging
Simple graph memory with BFS traversal for entity-relationship tracking
Memory garbage collection with two-phase expired+decayed pruning
Memory callback protocol for lifecycle observability
Pipeline query enrichment with memory context
Auto-promotion of evicted turns to long-term memory
In-memory reference implementations for all storage protocols
JSON file-backed persistent memory store
CLI with index and query commands (via typer+rich)
961 tests with 94% coverage