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Claude Code loses everything after /compact. Previous decisions, insights, technical findings, and conversation context vanish. Long sessions hit the context window limit and critical information gets pushed out. Every new session starts from scratch.
MemCP solves this. It gives Claude a persistent external memory — a place to store, organize, and retrieve knowledge across sessions without consuming context window tokens.
A persistent memory MCP server for Claude Code - Recursive Language Model integration for Claude Code inspired by MIT CSAIL paper
MemCP implements the RLM framework (Recursive Language Model, arXiv:2512.24601) — an active exploration model where content stays on disk and Claude decides what to load, rather than passive RAG retrieval.
graph TB
CC[Claude Code] -->|MCP Protocol| S[MemCP Server<br/>FastMCP]
S --> M[Memory<br/>24 tools]
S --> G[MAGMA Graph<br/>SQLite]
S --> SR[Search<br/>5 tiers]
S --> C[Context Store<br/>Filesystem]
G -->|4 edge types| E1[Semantic]
G --> E2[Temporal]
G --> E3[Causal]
G --> E4[Entity]
SA[Sub-Agents] -->|MCP| S
SA --> A1[Analyzer]
SA --> A2[Mapper x N]
SA --> A3[Synthesizer]
H[Hooks] -->|PreCompact| CC
H -->|Reminders| CC
3-layer delegation: server.py (MCP endpoints) → tools/*.py (orchestration) → core/*.py (business logic)
Storage: SQLite for the knowledge graph (graph.db) + filesystem for contexts and chunks (~/.memcp/)
Dependencies: Only 2 core packages (mcp, pydantic). Everything else is optional and unlocks progressively better capabilities.
memcp_reinforce; affects future rankingmemcp_consolidation_preview + memcp_consolidatepip install memcp[ner]) + LLM-based via sub-agentsusearch backend for O(log N) approximate nearest neighbor searchmax_tokens parameter caps how much enters the context windowbash scripts/install.shMemCP exposes 24 MCP tools organized into 8 categories. For full documentation with parameters, examples, and tips, see docs/TOOLS.md.
MemCP includes a benchmark suite that measures the token efficiency advantage of persistent memory over context-window-only operation. The suite compares Native mode (all knowledge in the context window) against RLM mode (knowledge stored externally, loaded on demand via MCP tools).
Methodology note: The native baseline models worst-case context window loading. Real Claude Code also uses built-in tools for on-demand retrieval. See the full benchmark report for methodology notes, caveats, and all 40 comparisons.
Run the benchmarks yourself:
make benchmark
Full report: benchmark_output/benchmark_report.md | Raw data: benchmark_output/benchmark_results.json
Before installing MemCP, ensure you have the following on your machine:
Claude Code CLI is required for MCP server registration, hooks, and sub-agent deployment. Install it from Anthropic's documentation.
Optional (for Docker installation):
git clone https://github.com/mohamedali-may/memcp.git
cd memcp
make setup
The interactive installer will:
~/.claude/agents/ (user-level, available across all projects)~/.claude/settings.json (preserves existing settings)CLAUDE.md to your project (session instructions for Claude Code)# Build and run
docker build -t memcp .
claude mcp add memcp -- docker run --rm -i \
-v ~/.memcp:/data -e MEMCP_DATA_DIR=/data memcp
Or with docker-compose:
docker-compose up -d
claude mcp add memcp -- docker run --rm -i \
-v ~/.memcp:/data -e MEMCP_DATA_DIR=/data memcp
If you prefer not to use the interactive installer:
# 1. Install in a venv
make dev # All extras (search, fuzzy, semantic, cache, …)
source .venv/bin/activate
# Or pick specific extras:
# pip install -e ".[dev]" # Dev tools only (pytest, ruff)
# pip install -e ".[dev,search,fuzzy]" # + BM25 + typo tolerance
# pip install -e ".[dev,semantic,cache]" # + vector embeddings + caching
# 2. Register with Claude Code
claude mcp add memcp -s user -- .venv/bin/python -m memcp
# 3. Deploy sub-agents (user-level, available across all projects)
mkdir -p ~/.claude/agents
cp agents/memcp-*.md ~/.claude/agents/
# 4. Merge hooks into global Claude Code settings
# If ~/.claude/settings.json doesn't exist or is empty:
cp hooks/snippets/settings.json ~/.claude/settings.json
# If it already has content, manually merge the "hooks" key from hooks/snippets/settings.json
# 5. Deploy CLAUDE.md to your project
cp templates/CLAUDE.md ./CLAUDE.md
# 6. Verify — in a Claude Code session, type: memcp_ping()
make teardown
The uninstaller lets you choose what to remove: MCP registration, sub-agents (~/.claude/agents/), hooks (from ~/.claude/settings.json), virtual environment, data directory, or everything.
MemCP follows the RLM (Recursive Language Model) framework: content is stored externally as named variables, and Claude actively navigates to what it needs — rather than passively receiving retrieved chunks (RAG).
Session Start
│
├─ memcp_recall(importance="critical") ← Load critical rules
├─ memcp_status() ← See memory stats
│
│ ... working ...
│
├─ memcp_remember("Decided to use Redis", ← Save a decision
│ category="decision",
│ importance="high",
│ tags="architecture,cache")
│
│ ... context filling up ...
│
├─ [Hook] "Consider saving context" ← Auto-reminder at 10 turns
│
├─ memcp_load_context("session-notes", ← Store large content on disk
│ content="...")
│
│ ... /compact ...
│
├─ [Hook] "SAVE REQUIRED" ← Blocks until saved
├─ memcp_remember(...) ← Save remaining insights
│
Next Session
│
├─ memcp_recall(importance="critical") ← Everything is still here
└─ memcp_search("Redis decision") ← Full search across sessions
Instead of loading a 50K-token document into the prompt:
memcp_load_context("report", file_path="large_report.md")
memcp_inspect_context("report") → type=markdown, 18K tokens, preview
memcp_chunk_context("report", "headings") → 12 chunks created
memcp_peek_chunk("report", 3) → reads only chunk #3 (~1500 tokens)
memcp_filter_context("report", "TODO|FIXME") → matching lines only
Result: ~1500 tokens in context instead of 18,000. A 92% reduction.
Every memcp_remember() creates a graph node and auto-generates edges:
memcp_remember("Use SQLite for graph", category="decision", tags="db")
│
├── temporal edge → insights created in last 30 min
├── entity edge → other insights mentioning "SQLite"
├── semantic edge → top-3 similar insights by content overlap
└── causal edge → if "because"/"therefore" detected, links to cause
Then memcp_recall("why SQLite?") detects "why" intent and follows causal edges to find the reasoning.
memcp_remember(
"Never push directly to main — always use PRs with at least 1 review",
category="decision",
importance="critical",
tags="git,workflow"
)
Next session: memcp_recall(importance="critical") loads this rule automatically.
memcp_load_context("api-module", file_path="src/api/routes.py")
memcp_inspect_context("api-module")
→ python, 2400 lines, ~15K tokens
memcp_chunk_context("api-module", strategy="lines", chunk_size=100)
→ 24 chunks created
memcp_filter_context("api-module", "def\\s+\\w+")
→ all function definitions (50 lines instead of 2400)
memcp_peek_chunk("api-module", 5)
→ read chunk #5 in detail
memcp_remember("Found race condition in file writer", category="finding", tags="bug,concurrency")
memcp_remember("Fixed race condition with flock", category="decision", tags="bug,concurrency")
memcp_related("abc123", edge_type="causal")
→ shows the finding linked to the fix decision
memcp_graph_stats()
→ 42 nodes, 287 edges, top entities: ["file writer", "flock", ...]
For analyzing a large document across multiple chunks in parallel:
memcp_chunk_context("design-doc", "auto") — partitionmemcp-mapper instances in background (one per chunk, Haiku)memcp-synthesizer in foreground with all mapper outputs (Sonnet)memcp/
├── src/memcp/
│ ├── __init__.py # Package version
│ ├── server.py # FastMCP server — 24 tool definitions (async)
│ ├── config.py # Environment config (dataclass) + validation
│ ├── core/
│ │ ├── memory.py # remember, recall, forget, status + semantic dedup
│ │ ├── errors.py # MemCPError hierarchy (5 exception types)
│ │ ├── secrets.py # Secret detection (8 regex patterns)
│ │ ├── graph.py # MAGMA 4-graph facade (delegates to components)
│ │ ├── node_store.py # SQLite connection, schema, node CRUD, entity index
│ │ ├── edge_manager.py # 4-type edge generation, Hebbian learning, edge decay
│ │ ├── graph_traversal.py # Query routing, intent detection, graph traversal
│ │ ├── consolidation.py # Similarity grouping + merge logic
│ │ ├── async_utils.py # Thread pool executor for non-blocking I/O
│ │ ├── context_store.py # Named context variables on disk
│ │ ├── chunker.py # 6 splitting strategies
│ │ ├── search.py # Tiered: keyword → BM25 → semantic → hybrid + BM25 cache
│ │ ├── embeddings.py # Model2Vec / FastEmbed providers
│ │ ├── vecstore.py # Vector store (brute-force + optional HNSW via usearch)
│ │ ├── embed_cache.py # Disk cache for embeddings
│ │ ├── retention.py # 3-zone lifecycle (active → archive → purge)
│ │ ├── project.py # Git root detection + session management
│ │ └── fileutil.py # Atomic writes, flock, safe names
│ └── tools/
│ ├── context_tools.py # Context + chunking tool implementations
│ ├── search_tools.py # Search tool implementation
│ ├── graph_tools.py # Graph traversal tools
│ ├── feedback_tools.py # Feedback/reinforce tool
│ ├── consolidation_tools.py # Consolidation preview + merge tools
│ ├── retention_tools.py # Retention lifecycle tools
│ └── project_tools.py # Project/session tools
├── hooks/
│ ├── pre_compact_save.py # Block /compact until context saved
│ ├── auto_save_reminder.py # Progressive reminders (10/20/30 turns)
│ ├── reset_counter.py # Reset counter after saves
│ └── snippets/
│ └── settings.json # Hook registration (merged into ~/.claude/settings.json)
├── agents/ # RLM sub-agent templates (deployed to ~/.claude/agents/)
│ ├── memcp-analyzer.md # Peek → identify → load → analyze
│ ├── memcp-mapper.md # MAP phase (Haiku, parallel)
│ ├── memcp-synthesizer.md # REDUCE phase (Sonnet)
│ └── memcp-entity-extractor.md # LLM entity extraction
├── templates/ # Deployed by installer to target locations
│ └── CLAUDE.md # Session instructions (deployed to project root)
├── scripts/
│ ├── install.sh # Interactive installer (8 steps)
│ └── uninstall.sh # Cleanup script
├── docs/
│ ├── ARCHITECTURE.md # System design + Mermaid diagrams
│ ├── TOOLS.md # All 24 tools reference
│ ├── SEARCH.md # Tiered search system
│ ├── GRAPH.md # MAGMA 4-graph memory
│ ├── HOOKS.md # Auto-save hooks
│ ├── COMPARISON.md # MemCP vs alternatives
│ └── adr/ # Architecture Decision Records
│ ├── README.md # ADR index
│ ├── 001-sqlite-filesystem-hybrid-storage.md
│ ├── 002-tiered-search-architecture.md
│ ├── 003-magma-4-graph-memory.md
│ ├── 004-sub-agents-over-sub-llms.md
│ ├── 005-minimal-core-dependencies.md
│ ├── 006-mcp-tools-over-python-repl.md
│ ├── 007-auto-save-hook-architecture.md
│ ├── 008-three-zone-retention-lifecycle.md
│ ├── 009-user-level-global-deployment.md
│ ├── 010-twelve-factor-configuration.md
│ ├── 011-hebbian-learning-edge-decay.md
│ ├── 012-reciprocal-rank-fusion-search.md
│ └── 013-memory-feedback-consolidation.md
├── tests/
│ ├── unit/ # 22 test files, 428 unit tests
│ ├── integration/ # 30 integration + concurrency stress tests
│ └── benchmark/ # 77 benchmarks (token efficiency, context rot, scale)
├── benchmark_output/ # Generated benchmark reports
│ ├── benchmark_report.md # Human-readable comparison tables
│ └── benchmark_results.json # Machine-readable raw data
├── .github/workflows/
│ ├── ci.yml # Lint + test matrix + Docker build
│ └── release.yml # PyPI publish on tag
├── pyproject.toml # Build config + deps + ruff + pytest
├── Dockerfile # Python 3.12-slim
├── docker-compose.yml # Volume mount for ~/.memcp
├── CONTRIBUTING.md # Contributor guidelines
├── SECURITY.md # Security policy
└── LICENSE # MIT
All configuration is via environment variables (12-factor):
MemCP's tiered dependency system means core features work with zero extras:
pip install memcp # Core (keyword search)
pip install memcp[search,fuzzy] # + ranked search + typo tolerance
pip install memcp[search,semantic,cache] # + vector embeddings + caching
pip install memcp[all] # Everything
make dev # Create venv + install all extras + pre-commit
source .venv/bin/activate
make test # Unit tests (core)
make test-all # Unit + benchmark tests
make benchmark # Benchmark suite only
make lint # Lint + format check (CI-equivalent)
make fmt # Auto-fix lint + format
make run # Start the MCP server
make clean # Remove build/cache artifacts
Note:
make devinstalls all optional extras (search,fuzzy,semantic,cache,vectors,llm,benchmark), so search and semantic tests will run out of the box. If you installed only specific extras, some search-tier tests will be skipped automatically.
Run make or make help to see all available targets.
v* tag pushSee CONTRIBUTING.md for guidelines on:
See SECURITY.md for:
Key security properties:
~/.memcp/) — nothing leaves your machineMEMCP_SECRET_DETECTION=false)fcntl.flock for concurrent access safetysafe_name() prevents path traversalMemCPError) with consistent error handling across all modulesbusy_timeout=5000 for ACID-compliant concurrent operationsMIT — see the LICENSE file for details.
MemCP builds on ideas from several research papers and projects:
A persistent memory MCP server for Claude Code - Recursive Language Model integration for Claude Code inspired by MIT CSAIL paper
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FAQ
คัดลอกคอนฟิก stdio สำหรับ Cursor, Claude Desktop, Claude Code หรือ VS Code ได้ในหน้านี้ คอนฟิกนี้ใช้การติดตั้งของผู้เผยแพร่ ไม่ใช่พร็อกซีของ PlugMCP
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Memcp ทำงานแบบโลคัลผ่าน stdio
ตรวจสอบล่าสุดเมื่อ 2026-10-28 A persistent memory MCP server for Claude Code - Recursive Language Model integration for Claude Code inspired by MIT CSAIL paper
