Enhanced Memory

Drop-in enhancement for OpenClaw's memory system. Replaces flat vector search with a 4-signal hybrid retrieval pipeline that achieved 0.782 MRR (vs ~0.45 baseline vector-only).

Setup

# Install Ollama and pull the embedding model
ollama pull nomic-embed-text

# Index your memory files (run from workspace root)
python3 skills/enhanced-memory/scripts/embed_memories.py

# Optional: build cross-reference graph
python3 skills/enhanced-memory/scripts/crossref_memories.py build

Re-run embed_memories.py whenever memory files change significantly.

Scripts

scripts/search_memory.py — Primary Search

Hybrid 4-signal retrieval with automatic adaptation:

python3 skills/enhanced-memory/scripts/search_memory.py "query" [top_n]

Signals fused:

1. Vector similarity (0.4) — cosine similarity via nomic-embed-text embeddings
2. Keyword matching (0.25) — query term overlap with chunk text
3. Header matching (0.1) — query terms in section headers
4. Filepath scoring (0.25) — query terms matching file/directory names

Automatic behaviors:

• Temporal routing — date references ("yesterday", "Feb 8", "last Monday") get 3x boost on matching files
• Adaptive weighting — when keyword overlap is low, shifts to 85% vector weight
• Pseudo-relevance feedback (PRF) — when top score < 0.45, expands query with terms from initial results and re-scores

scripts/enhanced_memory_search.py — JSON-Compatible Search

Same pipeline with JSON output format compatible with OpenClaw's memory_search tool:

python3 skills/enhanced-memory/scripts/enhanced_memory_search.py --json "query"

Returns {results: [{path, startLine, endLine, score, snippet, header}], ...}.

scripts/embed_memories.py — Indexing

Chunks all .md files in memory/ plus core workspace files (MEMORY.md, AGENTS.md, etc.) by markdown headers and embeds them:

python3 skills/enhanced-memory/scripts/embed_memories.py

Outputs memory/vectors.json. Batches embeddings in groups of 20, truncates chunks to 2000 chars.

scripts/memory_salience.py — Salience Scoring

Surfaces stale/important memory items for heartbeat self-prompting:

python3 skills/enhanced-memory/scripts/memory_salience.py          # Human-readable prompts
python3 skills/enhanced-memory/scripts/memory_salience.py --json   # Programmatic output
python3 skills/enhanced-memory/scripts/memory_salience.py --top 5  # More items

Scores importance × staleness considering: file type (topic > core > daily), size, access frequency, and query gap correlation.

scripts/crossref_memories.py — Knowledge Graph

Builds cross-reference links between memory chunks using embedding similarity:

python3 skills/enhanced-memory/scripts/crossref_memories.py build          # Build index
python3 skills/enhanced-memory/scripts/crossref_memories.py show <file>    # Show refs for file
python3 skills/enhanced-memory/scripts/crossref_memories.py graph          # Graph statistics

Uses file-representative approach (top 5 chunks per file) to reduce O(n²) to manageable comparisons. Threshold: 0.75 cosine similarity.

Configuration

All tunable constants are at the top of each script. Key parameters:

| Parameter | Default | Script | Purpose |

|-----------|---------|--------|---------|

| VECTOR_WEIGHT | 0.4 | search_memory.py | Weight for vector similarity |

| KEYWORD_WEIGHT | 0.25 | search_memory.py | Weight for keyword overlap |

| FILEPATH_WEIGHT | 0.25 | search_memory.py | Weight for filepath matching |

| TEMPORAL_BOOST | 3.0 | search_memory.py | Multiplier for date-matching files |

| PRF_THRESHOLD | 0.45 | search_memory.py | Score below which PRF activates |

| SIMILARITY_THRESHOLD | 0.75 | crossref_memories.py | Min similarity for cross-ref links |

| MODEL | nomic-embed-text | all | Ollama embedding model |

To use a different embedding model (e.g., mxbai-embed-large), change MODEL in each script and re-run embed_memories.py.

Integration

To replace the default memory search, point your agent's search tool at these scripts. The scripts expect:

• memory/ directory relative to workspace root containing .md files
• memory/vectors.json (created by embed_memories.py)
• Ollama running locally on port 11434

All scripts use only Python stdlib + Ollama HTTP API. No pip dependencies.