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Persistent memory + tool-calling intelligence for AI agents. (formerly Prism MCP)

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, a visual dashboard, and the prism-coder:1b7 / prism-coder:8b / prism-coder:14b / prism-coder:32b LLM fleet for offline tool-calling. → prism-mcp.com

Renamed in v14.0.0: the project is now Prism Coder to cover both the Mind Palace memory server and the prism-coder:1b7 / prism-coder:8b / prism-coder:14b / prism-coder:32b LLM fleet on HuggingFace + Ollama. The npm package stays prism-mcp-server so existing install URLs and mcp.json entries keep working — the prism-coder binary has been the canonical entry point since v12.

What Prism Coder 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.

🔄 Proactive session drift detection (new in v15)

Your AI agent can now detect when it has drifted from your original goals — mid-session, automatically — and self-correct before you notice the problem.

Three direct Prism calls:

1. session_save_ledger — snapshot current state
2. session_cognitive_route — compare current work against original goals, returns on_track / minor_drift / major_drift
3. session_compact_ledger — if drifted, compress and reload only what matters

When major drift is detected, the alert routes to the Synalux portal so it's visible across sessions and devices — not just in the current conversation.

Real example it caught: A training session promised BFCL ≥90% for three AI models. The agent spent 3 hours debugging audio bugs instead. The drift check surfaced: "Training goal unmet. Layer3 corpus missing from all training sets. 0 BFCL scores measured." The session immediately re-aligned.

No scripts. No cron. No hooks. Three tool calls, Prism handles the rest.

🛡 Local-first — security + speed

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

Why local models matter:

Install in one command — no config, no keys, no vendor agreements:

ollama pull dcostenco/prism-coder:1b7   # 2.2 GB · ~1.6s · any machine
ollama pull dcostenco/prism-coder:8b    # 4.7 GB · ~0.8s · Mac M1+ / iPhone 8GB
ollama pull dcostenco/prism-coder:14b   # 8.4 GB · ~1.1s · Mac M2+ / iPad Pro 16GB
ollama pull dcostenco/prism-coder:32b   # 16 GB  · ~0.8s · Mac M2 Ultra+ (30B-A3B MoE)

Prism MCP detects both the namespaced (dcostenco/prism-coder:14b) and bare (prism-coder:14b) Ollama tag forms automatically — nothing else to configure. If you want the bare tags as aliases for direct ollama run prism-coder:14b use, run:

prism register-models           # aliases */prism-coder:* → prism-coder:* via `ollama cp`
prism register-models --dry-run # preview what would be aliased

Cascade architecture

Two cascades operate independently depending on the deployment context:

Desktop / server cascade (quality-first, used in Prism MCP + Synalux portal):

prism-coder:14b ─── correct? ──YES──▶  serve  (99% of traffic, ~1.1s)
  │ NO
prism-coder:32b ─── correct? ──YES──▶  serve  (~1% of traffic, ~0.8s)
  │ NO
Claude Opus 4.7 ──────────────────────▶  serve  (0% in practice, cloud)

Mobile / offline cascade (availability-first, used in Prism AAC iOS):

prism-coder:14b (~1.1s) — iPad Pro 16GB  →  prism-coder:8b (~0.8s) — iPhone/iPad 8GB
  →  prism-coder:1.7b (~1.6s) — any device, always fits

Code generation cascade (used in Prism Coder IDE + Agent Mode):

prism-ide:14b ─── quality OK? ──YES──▶  serve  (~1.1s, 22/22 TypeScript eval)
  │ NO (complex / multi-file)
prism-ide:32b ─── quality OK? ──YES──▶  serve  (~0.8s MoE, deep reasoning)
  │ NO
Claude Sonnet 4 ──────────────────────▶  serve  (cloud fallback)

The routing cascade validates each response against the 6 known tool names and escalates on empty, truncated, or hallucinated tool calls. The code generation cascade escalates on incomplete or syntactically invalid output.

Routing accuracy (102-case Prism eval, v36/v7 system prompt, 3-seed mean, May 2026):

¹ ~99% of requests served by 14B at 1.1s; 32B for the ~1% 14B misses.

Why this matters for a life-critical AAC app: a child in a hospital without WiFi, a nonverbal adult on an airplane, or a family on a budget gets Claude-grade routing accuracy with zero cloud dependency — and the AAC path (expressing pain, asking for help) routes correctly 100% of the time across all tiers and all seeds tested.

What it does NOT mean: these scores measure routing precision on a narrow 6-tool taxonomy, not general intelligence. Claude outperforms these models on everything outside this task. The value is offline reliability at zero cost, not replacing Claude.

The prompt engineering breakthrough: Q4_K_M quantized models confuse semantically similar tool names when routing rules use plain keyword lists. Two structural fixes eliminated all confusion: (1) replacing -> plain text with -> respond directly (no tool), and (2) adding category labels (CONVERSATION RECALL: / SAVED KNOWLEDGE:) as semantic anchors stronger than keyword matching. Combined effect: 14B went from 87% → 100% on the 102-case Prism eval (v36/v7 system prompt, 3-seed mean).

⚡ 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

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

Models

Prism Coder inference cascades through fine-tuned models first, with Claude as a quality-gate fallback. Models route through the Synalux router (authentication + subscription required). Cascade: Cloud (OpenRouter) → Ollama local → Claude fallback.

Models use the Synalux SFT corpus (AAC + Prism MCP tool taxonomy + clinical workflows). Internal quality gate: ≥ 90% on the Prism 102-case eval before production promotion.

Training note: Base Qwen3 models are strong tool-routers out of the box. Heavy fine-tuning regresses tool-vs-plain-text decisions; light-touch polish recipes (small corpus, balanced tool/plain-text split) are the published path. Production adapter selection and retrain methodology are managed in the Synalux portal.

Per-category breakdown — Prism 102-case eval (3-seed mean, v36/v7 system prompt, May 2026):

Methodology: 102-case pool across 12 categories. Scores are 3-seed mean (seeds 2027/2028/2029, zero variance across all seeds). All fine-tuned models use the Qwen3 nothink template with keyword-trigger routing prompts and -> respond directly (no tool) for the no-tool class. Full runner: tests/benchmarks/prism-routing-100/benchmark.py · Cascade runner: tests/benchmarks/cascade-14b-32b-opus/cascade_eval.py.

These are NOT general-purpose LLM benchmarks. This eval measures routing precision on 6 specific MCP tools. The prism-coder models are specialists trained on this exact task — they match or exceed Claude on routing while Claude dominates on general reasoning, coding, and open-domain QA. The value is offline reliability at zero cost, not replacing cloud AI.

iOS deployment: On-device inference via llama.cpp Swift SPM. Auto-selects by device RAM: 14B on iPad Pro 16GB (100% routing), 8B on iPhone/iPad 8GB (100%, OOM fallback to 1.7B at 100%). CoreML not viable — coremltools doesn't support Qwen3 attention ops. Integration: LLMEngine.swift → prismNativeBridge.askAI() → token stream. WiFi fallback: Mac Ollama (OLLAMA_HOST=0.0.0.0).

Benchmarks — run them yourself

All benchmarks are open-source. Reproduce every number in this README:

git clone https://github.com/dcostenco/prism-coder
cd prism-coder
pip install anthropic requests

# Per-model solo eval (102 cases, 3 seeds)
python3 tests/benchmarks/prism-routing-100/benchmark.py --models 14b 8b 32b 1b7 opus

# Cascade eval — 14B → 32B → Opus (Claude Opus as etalon)
export ANTHROPIC_API_KEY=sk-ant-...
ollama pull dcostenco/prism-coder:14b dcostenco/prism-coder:32b
python3 tests/benchmarks/cascade-14b-32b-opus/cascade_eval.py

Not a general function-calling benchmark. This measures routing precision on 6 specific MCP tools. We don't claim to beat Claude on general capabilities. We match or exceed Claude on the ONE task that matters for offline AAC: correct tool routing, every time, under 2 seconds, with zero cloud.

Models on HuggingFace

Self-hosted / Local AI (Enterprise)

Run the full Prism model stack on your own hardware — zero cloud, zero latency, full data sovereignty.

Requirements: Mac M2 Pro+ (48GB recommended) or Linux with NVIDIA GPU · Ollama

# On-device tier — 1.1 GB (any machine, iPhone) — 100% routing
ollama pull dcostenco/prism-coder:1b7

# Mobile tier — 4.7 GB (iPhone/iPad 8GB, Mac M1+) — 100% routing
ollama pull dcostenco/prism-coder:8b

# Standard tier — 8.4 GB (Mac 24GB+, iPad Pro 16GB) — 100% routing
ollama pull dcostenco/prism-coder:14b

# Reasoning tier — 16 GB (Mac M2 Ultra+, 30B-A3B MoE) — 100% routing
ollama pull dcostenco/prism-coder:32b

Set LOCAL_LLM_URL=http://localhost:11434 in your portal config. Routing is automatic:

Desktop/server: 14B → 32B → Claude Opus fallback · Mobile/offline: 14B → 8B → 1.7B

iOS/mobile on same WiFi: OLLAMA_HOST=0.0.0.0 ollama serve on the Mac, then point LOCAL_LLM_URL at the Mac's IP.
Routing accuracy (May 2026, v36/v7 system prompt, 3-seed mean): 32B v7 = 100.0% · 8B v36 = 100.0% · 14B v36 = 100.0% · 1.7B v42 = 100.0%
Cascade (14B→32B): 100.0% · Opus solo: 98.3% · Opus engaged: 0% of requests → Full results

Plans

All on-device models are free for every tier — no subscription needed for local inference. Offline translation (1,261 phrases × 20 languages) included in all plans.

Subscribe →

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

Companions

🌐 Website

prism-mcp.com — full documentation, dashboard, subscription plans, and model downloads.

🧩 VS Code Extension — Synalux

Memory-augmented AI inside VS Code, powered by Prism. 20 multimodal tools, multi-agent orchestration, 12-language support. Works offline (Ollama) or cloud (OpenRouter). HIPAA-compliant healthcare workflows.

# Install from terminal
code --install-extension synalux-ai.synalux

Or open VS Code → Extensions (⇧⌘X) → search "Synalux" → Install.

📦 npm / npx

# Run without installing (always latest version)
npx prism-mcp-server

# Or install globally
npm install -g prism-mcp-server
prism load my-project

Package: prism-mcp-server on npm

PrismAAC

AAC communication app for non-speaking users. Powered by Prism's spreading-activation phrase ranking + on-device 7B model. macOS / iOS / Android via web. → github.com/dcostenco/prism-aac

🆕 Prism as Foundation (v14.0.0)

As of v14.0.0, Prism's algorithm exports are a stable public contract under SemVer. External systems can port actrActivation.ts (ACT-R cognitive decay), spreadingActivation.ts (the 0.7 similarity + 0.3 activation hybrid score), routerExperience.ts (experience bias with MIN_SAMPLES=5 cold-start gate), compactionHandler.ts (the 25KB prompt-budget cap), and graphMetrics.ts (warning ratios) with citations and pin a Prism version.

Reference consumers

Testing

npm test                           # 1,815 test cases across 71 files (vitest)
npm test -- --coverage             # coverage report
python3 tests/benchmarks/prism-routing-100/benchmark.py --models 1b7 14b 32b

Pinned in CI — 327 tests enforce every constant: ACT-R decay d=0.25, spreading-activation hybrid score 0.7/0.3, experience bias MIN_SAMPLES=5 / MAX_BIAS_CAP=0.15, graph-metrics warning ratios 0.20 / 0.30 / 0.40, compaction's 25KB prompt-budget. CI catches divergence automatically.

Coverage areas:

• HRR (Holographic Reduced Representations) edge cases + performance
• Encrypted sync corruption recovery
• BCBA skill integration
• Deep storage tier
• Dashboard rendering
• Routing benchmarks (102-case Prism eval) — see tests/benchmarks/prism-routing-100/

Migration

Local SQLite → Synalux portal

If you've been running Prism on the free tier and want to move historical session data into the paid-tier portal, use the migration script:

# dry run first — prints what would be migrated, hits no network
node scripts/migrate-local-to-portal.mjs --dry-run

# real run — pushes ledger + handoff entries through POST /api/v1/prism/memory
PRISM_SYNALUX_API_KEY=synalux_sk_... \
  node scripts/migrate-local-to-portal.mjs

# scope to one project
node scripts/migrate-local-to-portal.mjs --project=my-project

# include scholar entries (excluded by default — usually large + low-value)
node scripts/migrate-local-to-portal.mjs --include-scholar

What it does: reads ~/.prism-mcp/data.db via @libsql/client (already a runtime dep — no extra install), exchanges the refresh token for a JWT (cached + auto-refreshed before expiry), and POSTs each ledger entry and handoff to the portal. Failures are logged with the source row id; successes are counted at the end.

Credentials: PRISM_SYNALUX_API_KEY from env. If unset, the script also checks ~/prism/.env for PRISM_SYNALUX_API_KEY=... as a convenience for dev workflows.

Idempotency: handoffs are written with the portal's CRDT merge (last-write-wins per project+role); ledger entries are append-only and de-duped server-side by (project, conversation_id, summary). Re-running on the same DB is safe.

One-shot only: this script is a migration tool, not a sync daemon. Once you've moved, set PRISM_STORAGE=synalux (or leave it on auto and let the resolver pick synalux when credentials are present) and the MCP server writes directly to the portal going forward.

Production Infrastructure

Architecture

  CLIENTS
  ┌─────────────────────┐  ┌─────────────────────────────┐
  │  prism-aac (iOS/web)│  │  Claude Code · Cursor · IDE │
  │  Vercel             │  │  MCP config → Railway URL   │
  └──────────┬──────────┘  └─────────────┬───────────────┘
             │ inference                  │ memory
             ▼                            ▼
  ┌──────────────────────┐  ┌─────────────────────────────┐
  │  SYNALUX ROUTER      │  │  prism-mcp SERVER           │
  │  Vercel              │  │                             │
  │  • JWT auth          │  │  Primary   — Railway        │
  │  • tier enforcement  │  │  Standby   — Fly.io         │
  │  • complexity route  │  │  Fallback  — Supabase REST  │
  │  • proxy to cloud    │  │  auto-failover chain        │
  └──────────┬───────────┘  └─────────────┬───────────────┘
             │                            │
             ▼                            ▼
  ┌──────────────────────────────┐  ┌─────────────────────────────┐
  │  OPENROUTER / LOCAL          │  │  SUPABASE                   │
  │                              │  │  session ledgers            │
  │  Cloud: Claude Sonnet 4      │  │  knowledge graph            │
  │  Routing: prism-coder        │  │  handoffs & todos           │
  │   :32b(100%) :14b(100%)      │  │                             │
  │   :8b(100%)  :1b7(100%)      │  │  source of truth            │
  │  Code:    prism-ide          │  │                             │
  │   :14b · :32b                │  │                             │
  └──────────────────────────────┘  └─────────────────────────────┘

Service Routing

LLM Backends

Web Search

TTS (Text-to-Speech)

Other Services

Synalux Inference Router

All Prism AAC model inference is protected behind Synalux as a mandatory router. Models are never accessible directly — all traffic goes through Synalux for auth, billing, and rate limiting.

┌──────────────────────────────────────────────────────────┐
│  CLIENT LAYER                                            │
│  prism-aac (iOS/web)         │   Synalux Portal          │
└──────────────┬───────────────────────────────────────────┘
               │ POST /api/v1/prism-aac/inference
               │ Authorization: Bearer <user-JWT>
               ▼
┌──────────────────────────────────────────────────────────┐
│  SYNALUX ROUTER                                          │
│  1. Verify JWT (no anonymous access)                     │
│  2. Check subscription tier                              │
│  3. Enforce rate limit (per-tier daily cap)               │
│  4. Route to model tier by complexity                    │
│  5. Proxy → OpenRouter / Gemini (key never exposed)      │
│  6. Log → aac_inference_log (audit trail)                │
└──────────┬───────────────────────────────┬───────────────┘
           │                               │
           ▼                               ▼
  ┌────────────────────┐      ┌──────────────────────┐
  │  LOCAL (Ollama)    │      │  CLOUD (OpenRouter)  │
  │  prism-coder:14b   │      │  Claude Sonnet 4     │
  │  prism-coder:8b    │      │  Claude Haiku 3.5    │
  │  prism-coder:1b7   │      │  Gemini 2.5 Flash    │
  │  free, offline     │      │  paid tiers          │
  └────────────────────┘      └──────────────────────┘

On-device (free, offline):
  prism-coder:1b7 GGUF Q4_K_M (1.1 GB) → any Apple device
  prism-coder:8b  GGUF Q4_K_M (4.7 GB) → iPhone/iPad 8 GB+
  prism-coder:14b GGUF Q4_K_M (8.4 GB) → Mac/iPad Pro 16 GB+

HuggingFace: dcostenco/prism-coder-{14b,8b,32b,1.7b} (public GGUF weights)

All on-device models are free for every tier — no subscription needed for local inference. Offline translation (1,261 phrases × 20 languages) included in all plans.

Subscribe →

See docs/WOW_FEATURES.md for the algorithm catalogue. Release notes in docs/releases/v14.0.0-prism-as-foundation.md.

License

AGPL-3.0 — Open source. Same license as Prism AAC. Commercial use via Synalux subscription for hosted/managed deployment.