Praxis

plures

The Full Plures Application Framework

#database #deno #documentation #local-first #logic-programming #state #svelte #tarui

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Praxis

The Full Plures Application Framework

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Quick Links

📖 Documentation | Getting Started | Framework Guide
💬 Discussions | Issues
🚀 Contributing | Security Policy
📋 Changelog | Roadmap
🔄 Cross-Language Sync | C# Documentation

Project Status

Category	Status
CI/CD	✅ Automated testing & builds
Version	1.0.2 (Stable)
Runtime Support	Node.js 18+, Deno (experimental), .NET 8+
Package Registries	npm ✅ / NuGet ✅ / JSR ✅
Test Coverage	327 TypeScript + 95 C# tests passing
Documentation	📚 Comprehensive guides available

Language Support

Language	Package	Registry	Status
TypeScript	@plures/praxis	npm	✅ Available
C#	Plures.Praxis	NuGet	✅ Available
PowerShell	Praxis.psm1	GitHub	✅ Available

Integration Status

Integration	Status	Notes
Praxis Cloud	✅ Available	Azure-hosted relay for sync & monetization
PluresDB	✅ Available	Local-first reactive datastore with 32 tests
Unum	✅ Available	Identity & channels integration
Svelte 5	✅ Full Support	Runes API, stores, history, time-travel
Tauri	✅ Available	Cross-platform desktop runtime
CodeCanvas	✅ Available	Visual schema editor & FSM enforcement
State-Docs	✅ Available	Documentation generation from schemas

Overview

Praxis is not just a logic engine—it's a complete framework for building modern, local-first, distributed applications. It provides:

Declarative Schemas: Define your data models, logic, and components in a unified schema format (PSF)
Logic/State Machines: Pure, functional application logic with facts, events, rules, and constraints
Component Generation: Automatically generate Svelte components from schemas
Local-First Data: Integrated PluresDB for reactive, offline-capable data storage
Documentation Generation: Automatic documentation generation from schemas with Mermaid diagrams
Visual Design: CodeCanvas integration for visual schema and logic editing
Real-Time Code ↔ Canvas Sync: Bidirectional synchronization between code and visual editor
Orchestration: DSC/MCP support for distributed system coordination
Cross-Platform Runtime: Web, desktop, and mobile via Svelte + Tauri

🚀 Praxis 1.0 Architecture

Praxis 1.0 introduces a schema-driven, modular architecture where the Praxis Schema Format (PSF) serves as the single source of truth.

Praxis Schema Format (PSF)

PSF is the canonical JSON/AST format that defines your entire application:

{
  "$version": "latest",
  "id": "my-app",
  "name": "My Application",
  "facts": [...],
  "events": [...],
  "rules": [...],
  "constraints": [...],
  "models": [...],
  "components": [...],
  "flows": [...]
}

From this schema, Praxis generates:

TypeScript types for facts, events, rules
Svelte components for UI
Markdown documentation with Mermaid diagrams
Database schemas for PluresDB
Canvas visualization for visual editing

Modular Folder Structure

/praxis
├── core/                     # Core framework modules
│   ├── schema-engine/        # PSF types, compiler, generator, validator
│   ├── logic-engine/         # Rules, constraints, engine, PSF adapter
│   ├── db-adapter/           # PluresDB sync engine
│   └── codegen/              # Documentation and code generators
├── ui/                       # UI modules
│   ├── svelte-generator/     # PSF-aware Svelte component generation
│   └── canvas/               # Visual canvas state and projection
├── tools/                    # Developer tools
│   ├── cli/                  # Command-line interface
│   └── watcher/              # File watching and live sync
├── extensions/               # Optional integrations
│   ├── dsc/                  # DSC/MCP orchestration
│   ├── azure/                # Azure integration
│   └── devtools/             # Developer tools
└── examples/                 # Example applications
    ├── hero-shop/            # Full e-commerce example
    └── todo/                 # Minimal todo example

Framework Philosophy

Core Framework Components

Praxis provides these integrated capabilities:

Schema Engine – PSF parser, compiler, generator, and validator
Logic Engine – Typed facts, events, rules, and constraints for application logic
Component Factory – Generate Svelte components from schemas with data bindings
Data Layer – PluresDB integration for reactive, local-first data storage
State Machines – Flows and scenarios for orchestrated behaviors
Actors – Effectful units for side effects and external system integration
Terminal Nodes – Execute commands and scripts within the Praxis framework
Documentation – Automatic documentation generation from schemas with Mermaid diagrams
Visual IDE – CodeCanvas integration for schema and logic editing
Orchestration – DSC/MCP support for distributed coordination
CLI Tools – Command-line interface for scaffolding and generation

Design Philosophy

Schema-Driven Development
- Define once, generate everywhere (models, components, docs, orchestration)
- Single source of truth for your application structure
- Type-safe by default across all layers
Local-First Architecture
- Offline-capable by default with PluresDB
- Sync when connected, work always
- Data ownership and privacy built-in
Strong typing and functional programming
- Core abstractions are strongly typed: Fact<Tag, Payload>, Event<Tag, Payload>, Rule<Context, InFact, OutFact>
- Pure functions for testability and reasoning
- Immutable state updates
Visual and Code Workflows
- CodeCanvas for visual schema and logic editing
- Full code-level control when needed
- Seamless transitions between visual and code
Cross-Platform and Cross-Language
- TypeScript-first with C# and PowerShell support
- Web, desktop, mobile via Svelte + Tauri
- Language-agnostic core protocol for maximum portability

Framework Features

🏗️ Full Application Framework

Schema-Driven: Define data models, logic, and UI in unified schemas
Component Generation: Auto-generate Svelte components from schemas
CLI Tools: praxis create, praxis generate, praxis canvas commands
Templates: Pre-built app templates (basic, fullstack, distributed)
Integrated Stack: PluresDB + Unum + ADP + State-Docs + Canvas

🎨 Visual Development

CodeCanvas Integration: Visual schema and logic editor
Component Preview: See generated components in real-time
Flow Visualization: Visualize state machines and orchestration
Interactive Docs: Navigate documentation with State-Docs

🔌 Ecosystem Integration

PluresDB: Local-first reactive data storage
Unum: Identity and channels for distributed systems
ADP: Architectural guardrails and decision tracking
State-Docs: Living documentation generation
Svelte 5: Full runes support with history and time-travel
Tauri: Cross-platform runtime (web/desktop/mobile)

⚡ Svelte 5 Integration

Runes API: Modern $state, $derived, $effect support
History States: Built-in undo/redo and time-travel debugging
Store API: Backward-compatible stores for Svelte 4/5
Type Safety: Full TypeScript support with composables
Zero Config: Works out of the box with Svelte 5

Logic Engine Features

🎯 Logic-First Design: Build applications around facts, events, rules, and constraints
🔄 Pure Functional Core: State transitions via pure step functions
📝 Fluent DSL: Intuitive API for defining rules and constraints
🗂️ Registry System: Centralized management of rules and constraints
🌊 Flows & Actors: Orchestrate complex state transitions
📦 JSON-Friendly: All types are serializable for cross-platform use
🔒 Type-Safe: Full TypeScript support with strict typing
🔍 Introspection: Generate schemas, graphs, and visualizations of your logic
🌐 Cross-Language: C#, PowerShell, and TypeScript implementations with protocol versioning
📊 Comprehensive Testing: 327 TypeScript and 95 C# tests covering all features
🎭 Hero Example: Full e-commerce demo with auth, cart, features, and actors

Installation

npm (Node.js)

npm install @plures/praxis

NuGet (.NET / C#)

dotnet add package Plures.Praxis

Or add to your .csproj:

<PackageReference Include="Plures.Praxis" Version="0.2.1" />

See C# Documentation for detailed usage.

JSR (Deno)

# Coming soon - JSR publishing in progress
deno add @plures/praxis

For now, you can use Praxis with Deno via import maps:

// import_map.json
{
  "imports": {
    "@plures/praxis": "npm:@plures/praxis@^0.2.1"
  }
}

From Source

# Clone the repository
git clone https://github.com/plures/praxis.git
cd praxis

# TypeScript
npm install
npm run build
npm test

# C#
cd csharp
dotnet build
dotnet test

Quick Start

Using the Praxis CLI

The Praxis CLI provides commands for creating and managing applications.

# Install Praxis globally
npm install -g @plures/praxis

# Create a new application
praxis create app my-app
cd my-app
npm install

# Generate code from schemas
praxis generate --schema src/schemas/app.schema.ts

# Open CodeCanvas for visual editing
praxis canvas src/schemas/app.schema.ts

# Start development server
npm run dev

# Build for production
npm run build

Available CLI commands:

praxis login - Authenticate with GitHub (device flow or token)
praxis logout - Log out from Praxis Cloud
praxis whoami - Show current authenticated user
praxis create app [name] - Create new application
praxis create component [name] - Create new component
praxis generate - Generate code from schemas
praxis canvas [schema] - Open visual editor
praxis orchestrate - Manage distributed systems
praxis cloud init - Connect to Praxis Cloud
praxis cloud status - Check cloud connection
praxis cloud sync - Manually sync to cloud
praxis cloud usage - View cloud usage metrics
praxis dev - Start development server
praxis build - Build for production

See docs/guides/getting-started.md for detailed instructions.

Praxis Cloud

Connect your application to Praxis Cloud for automatic synchronization with GitHub-native authentication and billing:

# Authenticate with GitHub
npx praxis login

# Initialize cloud connection
npx praxis cloud init

# In your code
import { connectRelay } from "@plures/praxis/cloud";

const relay = await connectRelay("https://praxis-relay.azurewebsites.net", {
  appId: "my-app",
  authToken: process.env.GITHUB_TOKEN,
  autoSync: true
});

// Sync automatically handles CRDT merge
await relay.sync({
  type: "delta",
  appId: "my-app",
  clock: {},
  facts: [...],
  timestamp: Date.now()
});

See src/cloud/README.md and examples/cloud-sync for details.

Basic Example (Logic Engine)

import {
  createPraxisEngine,
  PraxisRegistry,
  defineFact,
  defineEvent,
  defineRule,
} from '@plures/praxis';

// Define the context type
interface AuthContext {
  currentUser: string | null;
}

// Define facts and events
const UserLoggedIn = defineFact<'UserLoggedIn', { userId: string }>('UserLoggedIn');
const Login = defineEvent<'LOGIN', { username: string }>('LOGIN');

// Define rules
const loginRule = defineRule<AuthContext>({
  id: 'auth.login',
  description: 'Process login event',
  impl: (state, events) => {
    const loginEvent = events.find(Login.is);
    if (loginEvent) {
      state.context.currentUser = loginEvent.payload.username;
      return [UserLoggedIn.create({ userId: loginEvent.payload.username })];
    }
    return [];
  },
});

// Create engine
const registry = new PraxisRegistry<AuthContext>();
registry.registerRule(loginRule);

const engine = createPraxisEngine({
  initialContext: { currentUser: null },
  registry,
});

// Dispatch events
const result = engine.step([Login.create({ username: 'alice' })]);
console.log(result.state.facts); // [{ tag: "UserLoggedIn", payload: { userId: "alice" } }]
console.log(engine.getContext()); // { currentUser: "alice" }

With Constraints

import { defineConstraint } from '@plures/praxis';

const maxSessionsConstraint = defineConstraint<AuthContext>({
  id: 'auth.maxSessions',
  description: 'Only one user can be logged in at a time',
  impl: (state) => {
    return state.context.currentUser === null || 'User already logged in';
  },
});

registry.registerConstraint(maxSessionsConstraint);

Svelte 5 Integration

Store API (Svelte 4/5 Compatible)

import { createPraxisStore, createDerivedStore } from '@plures/praxis/svelte';

const stateStore = createPraxisStore(engine);
const userStore = createDerivedStore(engine, (ctx) => ctx.currentUser);

// In Svelte component:
// $: currentUser = $userStore;
// <button on:click={() => stateStore.dispatch([Login.create({ username: "alice" })])}>
//   Login
// </button>

Runes API (Svelte 5 Only)

<script lang="ts">
  import { usePraxisEngine } from '@plures/praxis/svelte';
  import { createMyEngine, Login } from './my-engine';

  const engine = createMyEngine();
  const {
    context,      // Reactive context
    dispatch,     // Dispatch events
    undo,         // Undo last action
    redo,         // Redo action
    canUndo,      // Boolean: can undo?
    canRedo,      // Boolean: can redo?
  } = usePraxisEngine(engine, {
    enableHistory: true,    // Enable undo/redo
    maxHistorySize: 50,     // Keep last 50 snapshots
  });
</script>

<div>
  <p>User: {context.currentUser || 'Guest'}</p>

  <button onclick={() => dispatch([Login.create({ username: 'alice' })])}>
    Login
  </button>

  <button onclick={undo} disabled={!canUndo}>
    ⟲ Undo
  </button>

  <button onclick={redo} disabled={!canRedo}>
    ⟳ Redo
  </button>
</div>

See the Advanced Todo Example for a complete demo with:

Undo/redo functionality
Time-travel debugging
Keyboard shortcuts
Beautiful UI

For comprehensive guides:

Core Protocol

The language-neutral core protocol forms the foundation of Praxis:

// Facts and Events
interface PraxisFact {
  tag: string;
  payload: unknown;
}

interface PraxisEvent {
  tag: string;
  payload: unknown;
}

// State
interface PraxisState {
  context: unknown;
  facts: PraxisFact[];
  meta?: Record<string, unknown>;
}

// Step Function (the conceptual core)
type PraxisStepFn = (
  state: PraxisState,
  events: PraxisEvent[],
  config: PraxisStepConfig
) => PraxisStepResult;

This protocol is:

Pure and deterministic (data in → data out)
No side effects, no global state
JSON-friendly for cross-language compatibility
The foundation for all higher-level TypeScript APIs

Framework Architecture

/praxis
├── core/                          # Core framework
│   ├── schema/                    # Schema system
│   │   └── types.ts              # Schema type definitions
│   ├── logic/                     # Logic engine (existing src/core/)
│   │   ├── protocol.ts           # Language-neutral protocol
│   │   ├── rules.ts              # Rules, constraints, and registry
│   │   ├── engine.ts             # LogicEngine implementation
│   │   ├── actors.ts             # Actor system
│   │   └── introspection.ts      # Introspection and visualization
│   ├── component/                 # Component generation
│   │   └── generator.ts          # Svelte component generator
│   ├── pluresdb/                  # PluresDB integration core
│   │   ├── adapter.ts            # Database adapter interface
│   │   ├── store.ts              # Reactive store implementation
│   │   ├── schema-registry.ts    # Schema registry for PluresDB
│   │   └── generator.ts          # PluresDB config generator
│   └── runtime/                   # Runtime abstractions
├── cloud/                         # Praxis Cloud integration
│   ├── auth.ts                   # GitHub OAuth authentication
│   ├── billing.ts                # Tier-based billing
│   ├── provisioning.ts           # Tenant provisioning
│   └── relay/                    # Azure relay service
├── integrations/                  # Ecosystem integrations
│   ├── pluresdb.ts               # PluresDB integration exports
│   ├── svelte.ts                 # Svelte 5 integration
│   ├── unum/                     # Unum identity and channels
│   ├── adp/                      # Architectural Decision Protocol
│   ├── state-docs/               # State-Docs documentation
│   └── canvas/                   # CodeCanvas visual editor
├── components/                    # Svelte components
│   └── TerminalNode.svelte       # Terminal node component
├── cli/                          # Command-line interface
│   ├── index.ts                  # CLI entry point
│   └── commands/                 # Command implementations
├── templates/                     # Project templates
│   ├── basic-app/                # Basic application template
│   └── fullstack-app/            # Full-stack template
├── examples/                      # Example applications
│   ├── offline-chat/             # Offline-first chat demo
│   ├── knowledge-canvas/         # Knowledge management with Canvas
│   ├── distributed-node/         # Self-orchestrating node demo
│   ├── terminal-node/            # Terminal node demo
│   ├── terminal-canvas/          # Terminal + canvas demo
│   ├── cloud-sync/               # Cloud sync demo
│   ├── github-monetization/      # GitHub monetization demo
│   ├── simple-app/               # Simple app demo
│   ├── auth-basic/               # Login/logout example
│   ├── cart/                     # Shopping cart example
│   ├── svelte-counter/           # Svelte integration example
│   └── hero-ecommerce/           # Comprehensive e-commerce demo
└── docs/                         # Framework documentation
    ├── guides/                   # User guides
    │   ├── getting-started.md   # Getting started guide
    │   ├── canvas.md            # CodeCanvas guide
    │   └── orchestration.md     # Orchestration guide
    ├── api/                      # API reference
    └── architecture/             # Architecture documentation

See FRAMEWORK.md for complete architecture documentation.

Examples

The repository includes multiple complete examples:

1. Hero E-Commerce (`src/examples/hero-ecommerce`)

Comprehensive example demonstrating all Praxis features in a single application:

Authentication with session management
Shopping cart with discount rules
Feature flags for A/B testing
Loyalty program with points
Actors for logging and analytics
Constraints enforcing business rules

npm run build
node dist/examples/hero-ecommerce/index.js

2. Offline-First Chat (`examples/offline-chat`)

Demonstrates local-first architecture with PluresDB:

Offline message composition and storage
Automatic sync when connected
Message queue for offline messages
Conflict resolution for concurrent edits
Real-time features (typing indicators, read receipts)

See examples/offline-chat/README.md

3. Knowledge Canvas (`examples/knowledge-canvas`)

Showcases CodeCanvas integration for visual knowledge management:

Visual knowledge graph editing
Schema-driven content types
Generated UI components
State-Docs integration
Collaborative editing

See examples/knowledge-canvas/README.md

4. Self-Orchestrating Node (`examples/distributed-node`)

Demonstrates distributed orchestration with DSC/MCP:

Automatic node discovery
Self-healing behavior
State synchronization across nodes
Health monitoring and auto-scaling
Failover and recovery

See examples/distributed-node/README.md

5. Terminal Node (`examples/terminal-node`)

Demonstrates the terminal node feature for command execution:

Terminal adapter creation and configuration
Command execution and history tracking
YAML schema loading with terminal nodes
PluresDB binding configuration (ready for integration)
Both text and widget input modes

npm run build
node examples/terminal-node/index.js

See examples/terminal-node/README.md and docs/TERMINAL_NODE.md

6. Auth Basic (`src/examples/auth-basic`)

npm run build
node dist/examples/auth-basic/index.js

7. Cart (`src/examples/cart`)

Shopping cart with multiple rules, constraints, and complex state management.

npm run build
node dist/examples/cart/index.js

8. Svelte Counter (`src/examples/svelte-counter`)

Counter example showing Svelte v5 integration with reactive stores.

npm run build
node dist/examples/svelte-counter/index.js

9. Terminal Canvas (`examples/terminal-canvas`)

Combines terminal nodes with visual canvas features in a Svelte app.

See examples/terminal-canvas/README.md

10. GitHub Monetization (`examples/github-monetization`)

Example of GitHub-based monetization integration with Praxis Cloud.

See examples/github-monetization/README.md

11. Simple App (`examples/simple-app`)

A minimal example demonstrating basic Praxis schema usage.

See examples/simple-app/README.md

12. Cloud Sync (`examples/cloud-sync`)

Demonstrates real-time synchronization with Praxis Cloud relay service.

See examples/cloud-sync/README.md

API Reference

Core Types

PraxisFact, PraxisEvent, PraxisState - Protocol types
LogicEngine<TContext> - Main engine class
PraxisRegistry<TContext> - Rule and constraint registry
Actor<TContext> - Actor interface
ActorManager<TContext> - Actor lifecycle management

DSL Functions

defineFact<TTag, TPayload>(tag) - Define a typed fact
defineEvent<TTag, TPayload>(tag) - Define a typed event
defineRule<TContext>(options) - Define a rule
defineConstraint<TContext>(options) - Define a constraint
defineModule<TContext>(options) - Bundle rules and constraints

Helpers

findEvent(events, definition) - Find first matching event
findFact(facts, definition) - Find first matching fact
filterEvents(events, definition) - Filter events by type
filterFacts(facts, definition) - Filter facts by type

Introspection & Visualization

Tools for examining and visualizing your Praxis logic:

import { createIntrospector, PRAXIS_PROTOCOL_VERSION } from '@plures/praxis';

const introspector = createIntrospector(registry);

// Get statistics
const stats = introspector.getStats();
console.log(`Rules: ${stats.ruleCount}, Constraints: ${stats.constraintCount}`);

// Generate JSON schema
const schema = introspector.generateSchema(PRAXIS_PROTOCOL_VERSION);

// Generate graph visualization
const graph = introspector.generateGraph();

// Export to Graphviz DOT format
const dot = introspector.exportDOT();
fs.writeFileSync('registry.dot', dot);

// Export to Mermaid format
const mermaid = introspector.exportMermaid();

// Search rules and constraints
const authRules = introspector.searchRules('auth');
const maxConstraints = introspector.searchConstraints('max');

Available methods:

getStats() - Get registry statistics
generateSchema(protocolVersion) - Generate JSON schema
generateGraph() - Generate graph representation
exportDOT() - Export to Graphviz DOT format
exportMermaid() - Export to Mermaid diagram format
getRuleInfo(id) - Get detailed rule information
getConstraintInfo(id) - Get detailed constraint information
searchRules(query) - Search rules by text
searchConstraints(query) - Search constraints by text

Ecosystem Integration

Praxis integrates with the full Plures ecosystem:

PluresDB Integration

Local-first reactive datastore for offline-capable applications. Now fully implemented with 32 tests covering all features.

import {
  createInMemoryDB,
  createPraxisDBStore,
  createPluresDBAdapter,
  attachToEngine,
} from '@plures/praxis/pluresdb';

// Create an in-memory database
const db = createInMemoryDB();

// Create a PraxisDB store for facts and events
const store = createPraxisDBStore({ db });

// Or create an adapter to attach to an engine
const adapter = createPluresDBAdapter({
  db,
  registry,
  initialContext: {},
});

// Attach adapter to engine for automatic persistence
adapter.attachEngine(engine);

// Persist facts and events
await adapter.persistFacts([{ tag: 'UserLoggedIn', payload: { userId: 'alice' } }]);
await adapter.persistEvents([{ tag: 'LOGIN', payload: { username: 'alice' } }]);

// Subscribe to changes
adapter.subscribeToEvents((events) => {
  console.log('New events:', events);
});

Features:

In-memory adapter: Ready-to-use implementation for development and testing
Reactive store: Watch for changes with callbacks
Schema registry: Store and retrieve schemas in PluresDB
Config generator: Generate PluresDB configuration from Praxis schemas
Engine integration: Automatic fact/event persistence

Status: ✅ Available (src/core/pluresdb/, src/integrations/pluresdb.ts)
Tests: 32 tests covering adapter, store, registry, and engine integration

Unum Integration

Identity and channels for distributed systems.

import { createUnumIdentity, createChannel } from '@plures/unum';

// Create identity
const identity = await createUnumIdentity({
  name: 'my-app-node',
  keys: await generateKeys(),
});

// Create channel for messaging
const channel = await createChannel({
  name: 'app-events',
  participants: [identity.id],
});

// Integrate with Praxis actors
const unumActor = createActor('unum-bridge', identity, async (event) => {
  // Bridge Praxis events to Unum channels
  await channel.publish(event);
});

Status: Planned
Use Cases: Distributed messaging, identity management, authentication

ADP Integration

Architectural Decision Protocol for guardrails and governance.

import { createADP } from '@plures/adp';

// Track architectural decisions from schemas
const adp = createADP({
  source: 'praxis-schema',
  decisions: [
    {
      id: 'ADR-001',
      title: 'Use PluresDB for local-first storage',
      context: 'Need offline-capable data storage',
      decision: 'Adopt PluresDB',
      consequences: ['Offline support', 'Sync complexity'],
    },
  ],
});

// Enforce guardrails
adp.enforce({
  rule: 'no-direct-database-access',
  check: (code) => !code.includes('direct-sql'),
});

Status: Planned
Use Cases: Architecture documentation, compliance checking, guardrails

State-Docs Integration

Living documentation generated from Praxis schemas.

import { generateStateDocs } from '@plures/state-docs';

// Generate documentation from schema
const docs = await generateStateDocs({
  schema: appSchema,
  logic: logicDefinitions,
  components: componentDefinitions,
  output: './docs',
  format: 'markdown', // or 'html', 'pdf'
});

// Documentation includes:
// - Data model diagrams
// - Logic flow diagrams
// - Component catalog
// - API reference
// - Usage examples

Status: Planned
Documentation: See examples for State-Docs integration patterns

CodeCanvas Integration

Visual IDE for schema and logic editing.

# Open Canvas for visual editing
praxis canvas src/schemas/app.schema.ts

# Features:
# - Visual schema design
# - Logic flow editor
# - Component preview
# - Real-time collaboration
# - Export to code

Status: Planned
Documentation: docs/guides/canvas.md

Svelte + Tauri Runtime

Cross-platform runtime for web, desktop, and mobile.

// Svelte v5 integration (available now)
import { createPraxisStore } from '@plures/praxis/svelte';

const stateStore = createPraxisStore(engine);
const userStore = createDerivedStore(engine, (ctx) => ctx.currentUser);

// In Svelte component:
// $: currentUser = $userStore;

// Desktop app with Tauri
npm run tauri:dev    // Development
npm run tauri:build  // Production

Status: Svelte integration available, Tauri templates planned
Platform Support: Web (now), Desktop (planned), Mobile (future)

Cross-Language Usage

PowerShell

Full PowerShell adapter for using Praxis from PowerShell scripts:

# Import module
Import-Module ./powershell/Praxis.psm1

# Initialize adapter
Initialize-PraxisAdapter -EnginePath "./dist/adapters/cli.js"

# Create state and events
$state = New-PraxisState -Context @{ count = 0 }
$event = New-PraxisEvent -Tag "INCREMENT" -Payload @{}

# Process step
$result = Invoke-PraxisStep -State $state -Events @($event) -ConfigPath "./config.json"

# Use result
Write-Host "Count: $($result.state.context.count)"

See powershell/README.md for complete documentation and examples.

C# (.NET 8+)

Full C# implementation with functional, immutable design:

using Praxis.Core;
using Praxis.Dsl;

// Define facts and events
var UserLoggedIn = PraxisDsl.DefineFact<UserPayload>("UserLoggedIn");
var Login = PraxisDsl.DefineEvent<LoginPayload>("LOGIN");

record UserPayload(string UserId);
record LoginPayload(string Username);

// Define rules
var loginRule = PraxisDsl.DefineRule<AuthContext>(
    id: "auth.login",
    description: "Process login event",
    impl: (state, context, events) =>
    {
        var loginEvent = events.FindEvent(Login);
        if (loginEvent != null)
        {
            var payload = Login.GetPayload(loginEvent);
            return [UserLoggedIn.Create(new UserPayload(payload?.Username ?? "unknown"))];
        }
        return [];
    });

// Create engine
var registry = new PraxisRegistry<AuthContext>();
registry.RegisterRule(loginRule);

var engine = PraxisEngine.Create(new PraxisEngineOptions<AuthContext>
{
    InitialContext = new AuthContext(null),
    Registry = registry
});

// Dispatch events
var result = engine.Step([Login.Create(new LoginPayload("alice"))]);
Console.WriteLine($"Facts: {result.State.Facts.Count}"); // Facts: 1

See csharp/Praxis/README.md for complete documentation.

Roadmap

Current Focus

Full CodeCanvas integration
Enhanced Unum identity support
Advanced State-Docs generation
Multi-language schema support
Real PluresDB sync with CRDT/offline-first capabilities

Long Term

Mobile templates (iOS, Android)
Enterprise features
Advanced orchestration
Performance optimizations
Plugin ecosystem

Cross-Language Support

The core protocol is implemented across multiple languages:

TypeScript (Primary, npm: @plures/praxis)

import { createPraxisEngine, PraxisRegistry } from '@plures/praxis';

const engine = createPraxisEngine({
  initialContext: {},
  registry: new PraxisRegistry(),
});
const result = engine.step(events);

C# (.NET 8+, NuGet: Plures.Praxis)

var engine = PraxisEngine.Create(new PraxisEngineOptions<TContext> { ... });
var result = engine.Step(events);

See csharp/Praxis/README.md for full documentation.

PowerShell (GitHub: Praxis.psm1)

$newState = Invoke-PraxisStep -State $state -Events $events

See powershell/README.md for full documentation.

All implementations share the same protocol version and JSON format for interoperability. See CROSS_LANGUAGE_SYNC.md for details on keeping implementations in sync.

Development

# Install dependencies
npm install

# Build
npm run build

# Run tests
npm test

# Type check
npm run typecheck

Deno Development

# Run with Deno
deno task dev

# Run tests
deno task test

# Lint and format
deno task lint
deno task fmt

For more detailed development information, see CONTRIBUTING.md.

License

MIT License - see LICENSE for details.

Contributing

Contributions are welcome! Please read our Contributing Guide to get started.

Please review our Code of Conduct before participating.

Support

Praxis – Because application logic should be practical, provable, and portable.

Built with ❤️ by the plures team

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Praxis

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🚀 Praxis 1.0 Architecture

Praxis Schema Format (PSF)

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Runes API (Svelte 5 Only)

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Examples

1. Hero E-Commerce (src/examples/hero-ecommerce)

2. Offline-First Chat (examples/offline-chat)

3. Knowledge Canvas (examples/knowledge-canvas)

4. Self-Orchestrating Node (examples/distributed-node)

5. Terminal Node (examples/terminal-node)

6. Auth Basic (src/examples/auth-basic)

7. Cart (src/examples/cart)

8. Svelte Counter (src/examples/svelte-counter)

9. Terminal Canvas (examples/terminal-canvas)

10. GitHub Monetization (examples/github-monetization)

11. Simple App (examples/simple-app)

12. Cloud Sync (examples/cloud-sync)

API Reference

Core Types

DSL Functions

Helpers

Introspection & Visualization

Ecosystem Integration

PluresDB Integration

Unum Integration

ADP Integration

State-Docs Integration

CodeCanvas Integration

Svelte + Tauri Runtime

Cross-Language Usage

PowerShell

C# (.NET 8+)

Roadmap

Current Focus

Long Term

Cross-Language Support

Development

Deno Development

License

Contributing

Support

Top categories

1. Hero E-Commerce (`src/examples/hero-ecommerce`)

2. Offline-First Chat (`examples/offline-chat`)

3. Knowledge Canvas (`examples/knowledge-canvas`)

4. Self-Orchestrating Node (`examples/distributed-node`)

5. Terminal Node (`examples/terminal-node`)

6. Auth Basic (`src/examples/auth-basic`)

7. Cart (`src/examples/cart`)

8. Svelte Counter (`src/examples/svelte-counter`)

9. Terminal Canvas (`examples/terminal-canvas`)

10. GitHub Monetization (`examples/github-monetization`)

11. Simple App (`examples/simple-app`)

12. Cloud Sync (`examples/cloud-sync`)