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Psycho-Symbolic Reasoner WASM Build Guide

This guide covers the complete WASM compilation pipeline for the psycho-symbolic-reasoner project, which compiles three Rust crates into WebAssembly modules for use in JavaScript/TypeScript applications.

Overview
Prerequisites
Project Structure
Build Process
Testing
Usage
Troubleshooting
Performance

Overview

The psycho-symbolic-reasoner project consists of three main Rust crates that are compiled to WASM:

graph_reasoner: Knowledge graph construction and inference engine
extractors: Text analysis for sentiment, emotions, and preferences
planner: Goal-oriented action planning (GOAP) system

Each crate is compiled separately and then bundled together into a unified JavaScript package.

Prerequisites

Required Tools

Rust (1.70+)

curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
rustup target add wasm32-unknown-unknown

wasm-pack (0.12+)

curl https://rustwasm.github.io/wasm-pack/installer/init.sh -sSf | sh

Node.js (18+) and npm

System Requirements

Operating System: Linux, macOS, or Windows
Memory: 4GB+ RAM recommended for compilation
Disk Space: 2GB+ free space

Project Structure

psycho-symbolic-reasoner/
├── graph_reasoner/              # Knowledge graph reasoning
│   ├── src/
│   ├── Cargo.toml
│   ├── wasm-pack.toml          # WASM build configuration
│   └── pkg/                    # Generated WASM output
├── extractors/                 # Text analysis and extraction
│   ├── src/
│   ├── Cargo.toml
│   ├── wasm-pack.toml
│   └── pkg/
├── planner/                    # Goal-oriented planning
│   ├── src/
│   ├── Cargo.toml
│   ├── wasm-pack.toml
│   └── pkg/
├── wasm-dist/                  # Unified bundle output
├── build-wasm.cjs             # Build script
├── test-wasm.cjs              # Test script
├── bundle-wasm.cjs            # Bundling script
└── package.json               # Build configuration

Build Process

Quick Start

# Install dependencies
npm install

# Build all WASM modules (development)
node build-wasm.cjs --dev

# Build all WASM modules (production)
node build-wasm.cjs

# Test the modules
node test-wasm.cjs

# Create unified bundle
node bundle-wasm.cjs

Detailed Build Steps

1. Individual Crate Compilation

Each crate is compiled using wasm-pack with specific configurations:

# Development build (with debug symbols)
wasm-pack build --target web --dev graph_reasoner
wasm-pack build --target web --dev extractors
wasm-pack build --target web --dev planner

# Production build (optimized)
wasm-pack build --target web --release graph_reasoner
wasm-pack build --target web --release extractors
wasm-pack build --target web --release planner

2. WASM Configuration

Each crate has a wasm-pack.toml file:

[build]
target = "web"
out-dir = "pkg"
out-name = "crate_name"

[build.profile.release]
wee-alloc = true

[build.profile.dev]
debug = true

[pack]
name = "@psycho-symbolic/crate-name"

3. Dependency Configuration

The workspace Cargo.toml includes WASM-compatible dependencies:

# WASM support
wasm-bindgen = "0.2"
js-sys = "0.3"
wasm-bindgen-futures = "0.4"
console_error_panic_hook = "0.1"

# Random number generation (WASM-compatible)
rand = { version = "0.8", features = ["small_rng"] }
getrandom = { version = "0.2", features = ["js"] }
uuid = { version = "1.0", features = ["v4", "wasm-bindgen"] }

Build Scripts

build-wasm.cjs

The main build script handles:

Prerequisites checking
Parallel compilation of all crates
Package.json generation with proper exports
Error handling and reporting

Key features:

Development/production modes
Automatic dependency installation
Progress reporting
Build verification

Features

// Check if wasm-pack is installed
function checkWasmPack() { ... }

// Build individual crate
function buildCrate(crateName) { ... }

// Update package.json with exports
function updatePackageJson(crateName, pkgPath) { ... }

Testing

Test Suite (test-wasm.cjs)

The test script validates:

Module loading and initialization
Basic functionality of each crate
Performance benchmarks
TypeScript compatibility

Running Tests

# Run all tests
node test-wasm.cjs

# Individual tests are automatically run for:
# - Graph reasoning (fact insertion, queries, inference)
# - Text extraction (sentiment, emotions, preferences)
# - Planning (state management, action planning)

Test Coverage

Graph Reasoner Tests:
- Fact insertion and retrieval
- Query execution
- Inference engine
- Graph statistics
Extractors Tests:
- Sentiment analysis
- Preference extraction
- Emotion detection
- Comprehensive text analysis
Planner Tests:
- World state management
- Action and goal definition
- Plan generation
- Rule evaluation

Performance Benchmarks

The test suite includes performance benchmarks:

Fact insertion rate: ~22,000 facts/second
Memory usage tracking
Execution time measurements

Usage

JavaScript/ES6 Modules

import PsychoSymbolicReasoner from '@psycho-symbolic/reasoner';

const reasoner = new PsychoSymbolicReasoner();

// Graph reasoning
reasoner.addFact("Alice", "knows", "Bob");
const query = reasoner.query('{"type": "simple", "subject": "Alice"}');

// Text analysis
const sentiment = reasoner.analyzeSentiment("I love this product!");
const emotions = reasoner.detectEmotions("I'm so excited!");

// Planning
reasoner.setState("has_key", '{"type": "boolean", "value": true}');
const plan = reasoner.plan("unlock_door");

TypeScript

import PsychoSymbolicReasoner from '@psycho-symbolic/reasoner';

const reasoner = new PsychoSymbolicReasoner();

// Full type support
const capabilities = reasoner.capabilities();
console.log(capabilities.graphReasoning); // boolean

Individual Modules

// Import specific modules
import { GraphReasoner } from '@psycho-symbolic/reasoner/graph';
import { TextExtractor } from '@psycho-symbolic/reasoner/extractors';
import { PlannerSystem } from '@psycho-symbolic/reasoner/planner';

const graph = new GraphReasoner();
const extractor = new TextExtractor();
const planner = new PlannerSystem();

Bundle Formats

The build process generates multiple bundle formats:

ES Modules (.mjs): For modern JavaScript environments
CommonJS (.cjs): For Node.js environments
IIFE (.bundle.js): For direct browser inclusion

Troubleshooting

Common Issues

1. SystemTime Panics

Problem: time not implemented on this platform errors

Solution: The codebase includes WASM-compatible time functions:

#[cfg(target_arch = "wasm32")]
fn wasm_compatible_timestamp() -> u64 {
    use js_sys::Date;
    Date::now() as u64 / 1000
}

#[cfg(not(target_arch = "wasm32"))]
fn wasm_compatible_timestamp() -> u64 {
    std::time::SystemTime::now()
        .duration_since(std::time::UNIX_EPOCH)
        .unwrap_or_default()
        .as_secs()
}

2. Memory Issues

Problem: Out of memory during compilation

Solutions:

Use development builds (--dev) for faster compilation
Increase system memory or swap space
Build crates individually instead of in parallel

3. Module Loading Errors

Problem: Cannot load WASM modules in Node.js

Solution: Use initSync with buffer for Node.js:

const wasmBuffer = fs.readFileSync('module_bg.wasm');
wasmModule.initSync(wasmBuffer);

4. TypeScript Errors

Problem: Missing type definitions

Solution: Ensure TypeScript definitions are generated:

wasm-pack build --target web --typescript

Debug Mode

For debugging, use development builds:

node build-wasm.cjs --dev

Development builds include:

Debug symbols
Unoptimized code
Faster compilation
Better error messages

Logging

Enable detailed logging:

RUST_LOG=info node build-wasm.cjs

Performance

Optimization Strategies

Release Builds: Use --release for production
wee_alloc: Reduces WASM binary size
Feature Flags: Disable unused features
Bundle Splitting: Import only needed modules

Benchmarks

Based on test results:

Graph Operations: 22,000+ facts/second insertion
Text Analysis: Real-time processing for typical inputs
Planning: Sub-millisecond for simple scenarios

Memory Usage

graph_reasoner: ~200KB base WASM size
extractors: ~150KB base WASM size
planner: ~250KB base WASM size
Total Bundle: ~600KB compressed

Bundle Size Optimization

Production builds use:

Dead code elimination
wasm-opt optimization
Gzip compression
Tree shaking for unused exports

Integration Examples

Web Application

<!DOCTYPE html>
<html>
<head>
    <script type="module">
        import PsychoSymbolicReasoner from './wasm-dist/index.js';

        async function init() {
            const reasoner = new PsychoSymbolicReasoner();

            // Example usage
            const sentiment = reasoner.analyzeSentiment("Hello world!");
            console.log('Sentiment:', sentiment);
        }

        init();
    </script>
</head>
<body>
    <h1>Psycho-Symbolic Reasoner Demo</h1>
</body>
</html>

Node.js Application

const PsychoSymbolicReasoner = require('./wasm-dist/index.cjs');

async function main() {
    const reasoner = new PsychoSymbolicReasoner();

    // Graph reasoning
    reasoner.addFact("user", "prefers", "coffee");

    // Text analysis
    const analysis = reasoner.analyzeText("I really enjoy good coffee!");

    console.log('Analysis:', JSON.parse(analysis));
}

main().catch(console.error);

React Integration

import React, { useEffect, useState } from 'react';
import PsychoSymbolicReasoner from '@psycho-symbolic/reasoner';

function App() {
    const [reasoner, setReasoner] = useState(null);
    const [result, setResult] = useState('');

    useEffect(() => {
        const initReasoner = async () => {
            const r = new PsychoSymbolicReasoner();
            setReasoner(r);
        };
        initReasoner();
    }, []);

    const analyzeSentiment = (text) => {
        if (reasoner) {
            const sentiment = reasoner.analyzeSentiment(text);
            setResult(sentiment);
        }
    };

    return (
        <div>
            <h1>Sentiment Analysis</h1>
            <button onClick={() => analyzeSentiment("I love this!")}>
                Analyze
            </button>
            <pre>{result}</pre>
        </div>
    );
}

Contributing

Adding New Features

Rust Side: Add functionality to appropriate crate
WASM Bindings: Expose via #[wasm_bindgen]
Tests: Add tests in test-wasm.cjs
Documentation: Update this guide

Build System Changes

Build Script: Modify build-wasm.cjs
Dependencies: Update workspace Cargo.toml
Configuration: Adjust wasm-pack.toml files
Testing: Verify with test-wasm.cjs

Support

For issues and questions:

Check the troubleshooting section above
Review build logs for specific errors
Open an issue in the project repository
Consult the Rust WASM book: https://rustwasm.github.io/book/

This guide covers the complete WASM build pipeline. The system is designed to be robust, performant, and easy to use across different JavaScript environments.

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