🧠 Prism MCP

Persistent memory for AI agents.

A Model Context Protocol server that gives Claude, Cursor, and other AI tools a Mind Palace — long-term memory that survives across sessions, with semantic search, cognitive routing, and a visual dashboard.

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What Prism does

💾 Your AI remembers across sessions

Every conversation feeds the Mind Palace. Next session, your AI agent loads the right context automatically — no re-explaining.

🔍 Semantic search over your history

Ask "what did I decide about the auth flow last month?" and get the answer with citations. Vector search + keyword + graph traversal.

🧬 Cognitive routing

Different memory types live in different stores: episodic (what happened), semantic (what's true), procedural (how to do X). The router picks where to store and where to retrieve.

🛡 Local-first

Free tier runs entirely on your machine — SQLite, local embedding model, no API keys, no cloud. Paid tier adds cloud sync via Synalux portal.

⚡ Zero-search retrieval

Holographic Reduced Representations (HRR) for instant similarity lookups without an index. ~5ms over 100K memories.

🌐 Multi-agent Hivemind

Multiple AI agents share the same Mind Palace. Each agent has a role (dev / qa / pm / etc.) and sees scoped context. Heartbeat + roster for coordination.

Get started

# Install globally
npm install -g prism-mcp-server

# Or use npx (no install)
npx prism-mcp-server

Add to Claude Desktop / Cursor config:

{
  "mcpServers": {
    "prism": {
      "command": "npx",
      "args": ["-y", "prism-mcp-server"]
    }
  }
}

That's it. Open Claude / Cursor and your AI now has memory.

More setup details in docs/SETUP_GEMINI.md.

How AI agents use it

Tool	What it does
`session_load_context`	Recover prior session's state on boot
`session_save_ledger`	Append immutable session log entry
`session_save_handoff`	Save live state for the next session
`knowledge_search`	Semantic + keyword search over all memories
`query_memory_natural`	Natural-language Q&A over your Mind Palace
`extract_entities`	Pull people / projects / decisions from text
`session_synthesize_edges`	Auto-link related memories into a graph

(35+ tools total — full TypeScript signatures in src/tools/. Architecture overview in docs/ARCHITECTURE.md.)

Plans

	Free (local)	Paid (Synalux portal)
Local SQLite memory	✅	✅
Semantic search	✅ (local embedding)	✅ (cloud-backed)
Cross-device sync	—	✅
Hivemind multi-agent	✅ local team	✅ + cloud roster
Auto-Scholar (web research → memory)	—	✅
HRR Zero-Search retrieval	✅	✅
Custom domains / SSO	—	Enterprise

The thin-client architecture: when authenticated to Synalux, prism-mcp routes through the portal for paid features. When not authenticated (or PRISM_FORCE_LOCAL=1), runs purely local. Same binary.

Pricing →

What you can build with it

Persistent coding assistant that remembers your codebase, your decisions, your team's conventions
Research agent that builds knowledge over time — Auto-Scholar pipeline ingests papers / docs and synthesizes
Clinical scribe that retains patient context across visits (HIPAA-compliant cloud + local)
Customer support agent that learns from every ticket
Writing assistant that knows your voice, your prior drafts, and what you've already published

Companion: Prism Coder IDE

Standalone desktop AI IDE built on Prism's memory backend. macOS / Windows. Local-first 7B model handles routine edits; Standard+ tiers route to Claude Sonnet 4; Enterprise gets Claude Opus 4.

Download Prism Coder IDE →

📚 Architecture, cognitive systems, and full feature catalog

Detailed docs in this repo:

docs/ARCHITECTURE.md — system architecture, memory routing, HRR
docs/SETUP_GEMINI.md — Gemini configuration
docs/self-improving-agent.md — adversarial eval / anti-sycophancy
docs/rfcs/ — design RFCs
docs/releases/ — per-version release notes
CHANGELOG.md — version history (v12.5 Unified Billing, v11.6 Hivemind, v11.5.1 Auto-Scholar, etc.)
CONTRIBUTING.md — contributor guide

The original 1933-line README is preserved in git history. To browse the prior version (full feature catalog, Cognitive Architecture v7.8, Autonomous Cognitive OS v9.0, HRR Zero-Search, Adversarial Evaluation walkthroughs, Universal Import patterns, competitive analysis vs LangMem/MemGPT/Letta/Zep, v12.5 Unified Billing details, v11.6 Hivemind, v11.5.1 Auto-Scholar): git show HEAD~1:README.md.

License

BUSL-1.1 — Business Source License. Free for non-production use. Production use requires a Synalux subscription or commercial license. After 2 years, converts to MIT.

prism-coder