@putervision/behavior-mcp

Name: Behavior Runtime MCP
Author: putervision

High-Frequency (~60Hz) In-Browser Behavior Tree Tactical Runtime Engine for AI Agents

@putervision/behavior-mcp is a Model Context Protocol (MCP) server that executes deterministic behavior trees directly in browser runtimes at ~60Hz with reactive trigger preemption, frame recordings, SHA-256 Merkle audit chains, and a 5-layer safety guardrail stack.

🌐 Official Documentation: putervision.com • Interactive Web Docs

⚡ 15-Second Quick Start

bash

# 1. Initialize runtime & seed default behavior trees in your workspace
npx @putervision/behavior-mcp init

# 2. Run system diagnostic and health checks
npx @putervision/behavior-mcp doctor

# 3. Inspect active executions, blackboard state, and reactive triggers
npx @putervision/behavior-mcp inspect

🛠️ 10 Core MCP Tools

Tool	Actions	Purpose
`load_behavior`	`load`, `unload`, `swap`	Inject, initialize, or hot-swap a behavior tree in browser runtime
`set_parameters`	`set`, `get`, `reset`	Dynamically update or query runtime execution parameters
`get_status`	`current`, `history`, `tree_state`	Query active status, node traversal path, tick count, duration
`abort_behavior`	`abort`, `pause`, `resume`	Halt, pause, or resume behavior execution safely
`register_trigger`	`register`, `list`	Configure reactive interrupt triggers with priority preemption
`replay_recording`	`capture`, `list`	Capture or inspect deterministic browser action sequences
`get_metrics`	`current`, `history`	Retrieve runtime telemetry, tick durations, and stuck events
`manage_behaviors`	`register`, `get`, `list`	CRUD for immutable behavior tree JSON with SHA-256 tree hashes
`manage_blackboard`	`get`, `set`	Read, write, or query shared behavior tree blackboard variables
`manage_runtime_db`	`stats`, `audit`, `snapshot`, `restore`	SQLite diagnostics, SHA-256 Merkle audit, and checkpoint rollback

🛡️ 5-Layer Safety Guardrail Stack & System 1 Invariants

Fail-Closed Evaluator: Unrecognized node definitions throw fatal exceptions immediately.
60Hz Tick Invariant & Synchronous semantic_check: The loop never blocks on external network calls; semantic condition checks resolve synchronously against blackboard caches.
HMAC Intention Gate Verification: Intentions dispatched to execution nodes require unexpired, cryptographically signed dispatch tokens (PENTAD_HMAC_SECRET).
Action Rate Limiter & Leaf Policy Gate: Strict 60 actions/sec maximum throughput ceiling and policy guardrails blocking irreversible mutations.
Emergency Kill Switch & Watchdog Heartbeat: Atomic safety latch and watchdog timers halting execution if tick stalls beyond 5,000ms.

📚 Deep Documentation Guides

📖 Formal API Reference: Full parameter tables, type definitions, and tool schemas.
💡 Core Architecture & Concepts: Behavior tree execution model, ~60Hz loop, and trigger lifecycle.
🖥️ CLI Usage Guide: Complete CLI command reference (init, doctor, inspect, run).
💾 Database Schema: SQLite table structures, indexes, and Merkle audit ledger.
⚙️ Configuration Reference: .behavior-mcp.json parameters and environment variables.

🔗 Client Configuration & Environment

Add to .cursor/mcp.json or .vscode/mcp.json:

json

{
  "mcpServers": {
    "behavior-mcp": {
      "command": "behavior-mcp",
      "args": ["run"],
      "env": {
        "PENTAD_HMAC_SECRET": "your-secure-shared-secret-here"
      }
    }
  }
}

🧪 Testing

bash

# Run full unit and integration test suite across 38 test files (266 tests)
npm test

Behavior Runtime MCP

What it does

What it costs