JSPM

// Brain teaches: "fraud looks like this"
await memory.store("guard", "check", worldState, "block", {
  indicators: [
    { variable: "account_age_hours", weight: 0.3, condition: "< 24" },
    { variable: "requests_per_hour", weight: 0.3, condition: "> 10", fuzzy: true },
    { variable: "is_vpn", weight: 0.2, condition: "true" },
  ],
  compounds: [
    { variables: ["account_age_hours", "is_vpn"], conditions: ["< 24", "true"], weight: 0.4 },
  ],
  threshold: 0.6,
});

// Now evaluate 4 different people. Zero brain calls. CPU math only.
memory.evaluate({ account_age_hours: 2, requests_per_hour: 50, is_vpn: true });   // score 1.4 -> BLOCK
memory.evaluate({ account_age_hours: 4320, requests_per_hour: 3, is_vpn: false }); // score 0.0 -> ALLOW
memory.evaluate({ account_age_hours: 12, requests_per_hour: 9, is_vpn: false });   // score 0.5 -> ALLOW
memory.evaluate({ account_age_hours: 8760, requests_per_hour: 2, is_vpn: true });  // score 0.2 -> ALLOW

// Level 1: Immutable guardrails (code-level, cannot be overridden)
memory.addGuardrail((input, proposedDecision) => {
  if (input.account_age_hours > 8760 && proposedDecision === "block") return "allow";
  return null;
});

// Level 2: Schema validation (rejects hallucinated variables from LLM)
const memory = new VerticalMemory({
  allowedVariables: ["account_age_hours", "requests_per_hour", "has_2fa", "is_vpn"],
});
// LLM invents "days_since_creation"? SchemaValidationError. Rejected. Auto-retry.

// Level 3: Conflict resolution (when multiple heuristics fire)
// Highest confidence wins. Same confidence = most recent wins. Tie = fail-open (allow).

const { Space, BodyAdapter } = require("@srk0102/plexa")
const { OllamaBrain } = require("@srk0102/plexa/bridges/ollama")

class Cart extends BodyAdapter {
  static bodyName = "cart"
  static tools = {
    apply_force: {
      description: "push",
      parameters: {
        direction: { type: "string", enum: ["left", "right"], required: true },
        magnitude: { type: "number", min: 0, max: 1, required: true },
      },
    },
  }
  async apply_force({ direction, magnitude }) {
    console.log(`push ${direction} @${magnitude}`)
  }
}

const space = new Space("balancer")
space.addBody(new Cart())
space.setBrain(new OllamaBrain({ model: "llama3.2" }))
space.setGoal("balance the pole upright")
await space.run()

const { OllamaBrain }    = require("@srk0102/plexa/bridges/ollama")    // local, free
const { OpenAIBrain }    = require("@srk0102/plexa/bridges/openai")    // GPT-4o
const { AnthropicBrain } = require("@srk0102/plexa/bridges/anthropic") // Claude
const { BedrockBrain }   = require("@srk0102/plexa/bridges/bedrock")   // AWS Nova
const { TogetherBrain }  = require("@srk0102/plexa/bridges/together")  // Llama, Qwen

// SQLite (default, zero config)
const memory = new VerticalMemory({ dbPath: "./memory.db" });

// Postgres (production)
const { PostgresAdapter } = require("@srk0102/plexa/adapters/postgres");
const memory = new VerticalMemory({
  dbAdapter: new PostgresAdapter({ connectionString: "postgres://..." }),
});