Core

Core is a Web3 Framework, written in Go using Wails.io to replace Electron and the bloat of browsers that, at their core, still live in their mum's basement.

• Repo: https://github.com/host-uk/core

Vision

Core is an opinionated Web3 desktop application framework providing:

1. Service-Oriented Architecture - Pluggable services with dependency injection
2. Encrypted Workspaces - Each workspace gets its own PGP keypair, files are obfuscated
3. Cross-Platform Storage - Abstract storage backends (local, SFTP, WebDAV) behind a Medium interface
4. Multi-Brand Support - Same codebase powers different "hub" apps (AdminHub, ServerHub, GatewayHub, DeveloperHub, ClientHub)
5. Built-in Crypto - PGP encryption/signing, hashing, checksums as first-class citizens

Mental model: A secure, encrypted workspace manager where each "workspace" is a cryptographically isolated environment. The framework handles windows, menus, trays, config, and i18n.

Quick Start

import core "github.com/host-uk/core"

app := core.New(
  core.WithServiceLock(),
)

Prerequisites

• Go 1.25+
• Node.js
• Wails v3
• Task

Development Workflow (TDD)

task test-gen    # 1. Generate test stubs
task test        # 2. Run tests (watch them fail)
# 3. Implement your feature
task test        # 4. Run tests (watch them pass)
task review      # 5. CodeRabbit review

Building & Running

# GUI (Wails)
task gui:dev      # Development with hot-reload
task gui:build    # Production build

# CLI
task cli:build    # Build to cmd/core/bin/core
task cli:run      # Build and run

All Tasks

Task	Description
task test	Run all Go tests
task test-gen	Generate test stubs for public API
task check	go mod tidy + tests + review
task review	CodeRabbit review
task cov	Generate coverage.txt
task cov-view	Open HTML coverage report
task sync	Update public API Go files

---

Architecture

Project Structure

.
├── core.go              # Facade re-exporting pkg/core
├── pkg/
│   ├── core/            # Service container, DI, Runtime[T]
│   ├── config/          # JSON persistence, XDG paths
│   ├── display/         # Windows, tray, menus (Wails)
│   ├── crypt/           # Hashing, checksums, PGP
│   │   └── openpgp/     # Full PGP implementation
│   ├── io/              # Medium interface + backends
│   ├── workspace/       # Encrypted workspace management
│   ├── help/            # In-app documentation
│   └── i18n/            # Internationalization
├── cmd/
│   ├── core/            # CLI application
│   └── core-gui/        # Wails GUI application
└── go.work              # Links root, cmd/core, cmd/core-gui

Service Pattern (Dual-Constructor DI)

Every service follows this pattern:

// Static DI - standalone use/testing (no core.Runtime)
func New() (*Service, error)

// Dynamic DI - for core.WithService() registration
func Register(c *core.Core) (any, error)

Services embed *core.Runtime[Options] for access to Core() and Config().

IPC/Action System

Services implement HandleIPCEvents(c *core.Core, msg core.Message) error - auto-discovered via reflection. Handles typed actions like core.ActionServiceStartup.

---

Wails v3 Frontend Bindings

Core uses Wails v3 to expose Go methods to a WebView2 browser runtime. Wails automatically generates TypeScript bindings for registered services.

Documentation: Wails v3 Method Bindings

How It Works

1. Go services with exported methods are registered with Wails
2. Run wails3 generate bindings (or wails3 dev / wails3 build)
3. TypeScript SDK is generated in frontend/bindings/
4. Frontend calls Go methods with full type safety, no HTTP overhead

Current Binding Architecture

// cmd/core-gui/main.go
app.RegisterService(application.NewService(coreService))  // Only Core is registered

Problem: Only Core is registered with Wails. Sub-services (crypt, workspace, display, etc.) are internal to Core's service map - their methods aren't directly exposed to JS.

Currently exposed (see cmd/core-gui/public/bindings/):

// From frontend:
import { ACTION, Config, Service } from './bindings/github.com/host-uk/core/pkg/core'

ACTION(msg)              // Broadcast IPC message
Config()                 // Get config service reference
Service("workspace")     // Get service by name (returns any)

NOT exposed: Direct calls like workspace.CreateWorkspace() or crypt.Hash().

The IPC Bridge Pattern (Chosen Architecture)

Sub-services are accessed via Core's IPC/ACTION system, not direct Wails bindings:

// Frontend calls Core.ACTION() with typed messages
import { ACTION } from './bindings/github.com/host-uk/core/pkg/core'

// Open a window
ACTION({ action: "display.open_window", name: "settings", options: { Title: "Settings", Width: 800 } })

// Switch workspace
ACTION({ action: "workspace.switch_workspace", name: "myworkspace" })

Each service implements HandleIPCEvents(c *core.Core, msg core.Message) to process these messages:

// pkg/display/display.go
func (s *Service) HandleIPCEvents(c *core.Core, msg core.Message) error {
    switch m := msg.(type) {
    case map[string]any:
        if action, ok := m["action"].(string); ok && action == "display.open_window" {
            return s.handleOpenWindowAction(m)
        }
    }
    return nil
}

Why this pattern:

• Single Wails service (Core) = simpler binding generation
• Services remain decoupled from Wails
• Centralized message routing via ACTION()
• Services can communicate internally using same pattern

Current gap: Not all service methods have IPC handlers yet. See HandleIPCEvents in each service to understand what's wired up.

Generating Bindings

cd cmd/core-gui
wails3 generate bindings    # Regenerate after Go changes

Bindings output to cmd/core-gui/public/bindings/github.com/host-uk/core/ mirroring Go package structure.

---

Service Interfaces (pkg/core/interfaces.go)

type Config interface {
    Get(key string, out any) error
    Set(key string, v any) error
}

type Display interface {
    OpenWindow(opts ...WindowOption) error
}

type Workspace interface {
    CreateWorkspace(identifier, password string) (string, error)
    SwitchWorkspace(name string) error
    WorkspaceFileGet(filename string) (string, error)
    WorkspaceFileSet(filename, content string) error
}

type Crypt interface {
    EncryptPGP(writer io.Writer, recipientPath, data string, ...) (string, error)
    DecryptPGP(recipientPath, message, passphrase string, ...) (string, error)
}

---

Current State (Prototype)

Working

Package	Notes
pkg/core	Service container, DI, thread-safe - solid
pkg/config	JSON persistence, XDG paths - solid
pkg/crypt	Hashing, checksums, PGP - solid, well-tested
pkg/help	Embedded docs, Show/ShowAt - solid
pkg/i18n	Multi-language with go-i18n - solid
pkg/io	Medium interface + local backend - solid
pkg/workspace	Workspace creation, switching, file ops - functional

Partial

Package	Issues
pkg/display	Window creation works; menu/tray handlers are TODOs

---

Priority Work Items

1. IMPLEMENT: System Tray Brand Support

pkg/display/tray.go:52-63 - Commented brand-specific menu items need implementation.

2. ADD: Integration Tests

Package	Notes
pkg/display	Integration tests requiring Wails runtime (27% unit coverage)

---

Package Deep Dives

pkg/workspace - The Core Feature

Each workspace is:

1. Identified by LTHN hash of user identifier
2. Has directory structure: config/, log/, data/, files/, keys/
3. Gets a PGP keypair generated on creation
4. Files accessed via obfuscated paths

The workspaceList maps workspace IDs to public keys.

pkg/crypt/openpgp

Full PGP using github.com/ProtonMail/go-crypto:

• CreateKeyPair(name, passphrase) - RSA-4096 with revocation cert
• EncryptPGP() - Encrypt + optional signing
• DecryptPGP() - Decrypt + optional signature verification

pkg/io - Storage Abstraction

type Medium interface {
    Read(path string) (string, error)
    Write(path, content string) error
    EnsureDir(path string) error
    IsFile(path string) bool
    FileGet(path string) (string, error)
    FileSet(path, content string) error
}

Implementations: local/, sftp/, webdav/

---

Future Work

Phase 1: Core Stability

• Fix workspace medium injection (critical blocker)
• Initialize io.Local global
• Clean up dead code (orphaned vars, broken wrappers)
• Wire up IPC handlers for all services (config, crypt, display, help, i18n, workspace)
• Complete display menu handlers (New/List workspace)
• Tray icon setup with asset embedding
• Test coverage for io packages
• System tray brand-specific menus

Phase 2: Multi-Brand Support

• Define brand configuration system (config? build flags?)
• Implement brand-specific tray menus (AdminHub, ServerHub, GatewayHub, DeveloperHub, ClientHub)
• Brand-specific theming/assets
• Per-brand default workspace configurations

Phase 3: Remote Storage

• Complete SFTP backend (pkg/io/sftp/)
• Complete WebDAV backend (pkg/io/webdav/)
• Workspace sync across storage backends
• Conflict resolution for multi-device access

Phase 4: Enhanced Crypto

• Key management UI (import/export, key rotation)
• Multi-recipient encryption
• Hardware key support (YubiKey, etc.)
• Encrypted workspace backup/restore

Phase 5: Developer Experience

• TypeScript types for IPC messages (codegen from Go structs)
• Hot-reload for service registration
• Plugin system for third-party services
• CLI tooling for workspace management

Phase 6: Distribution

• Auto-update mechanism
• Platform installers (DMG, MSI, AppImage)
• Signing and notarization
• Crash reporting integration

---

For New Contributors

1. Run task test to verify all tests pass
2. Follow TDD: task test-gen creates stubs, implement to pass
3. The dual-constructor pattern is intentional: New(deps) for tests, Register() for runtime
4. See cmd/core-gui/main.go for how services wire together
5. IPC handlers in each service's HandleIPCEvents() are the frontend bridge