Gear System Feasibility Study - Comprehensive Analysis

Date: January 26, 2026 Author: Claude (AI Analysis) Status: Research Complete - Awaiting Review

Executive Summary
Current Architecture Analysis
Chosen Approach
Directory Structure
Gear Interface Specification
Framework Components to Extract
Migration Strategy
Pros and Cons Analysis
Research Sources

Executive Summary

After thorough analysis of your codebase and extensive research into Go gear systems used by major projects (Caddy, Grafana, HashiCorp, Traefik), I've concluded that:

Verdict: FEASIBLE and RECOMMENDED - but with the Compile-Time Gear approach, NOT Go's native runtime gear system.

Your current "integrations" system is already 70% of the way to a gear architecture. The primary work involves:

Extracting shared framework components
Defining a formal Gear interface
Restructuring code into self-contained gear packages
Creating gear documentation for humans and AI agents

Estimated Effort: 4-6 weeks of focused development Risk Level: Medium (significant refactoring, but patterns are proven) Long-term Value: High (easier maintenance, extensibility, clear boundaries)

Current Architecture Analysis

What You Have (HAProxy Monitoring)

Your application already implements a proto-gear system called "Integrations":

Feature	Current State	Full Gear System
Enable/disable per server	✅ Implemented	✅ Same
Custom configuration (JSON)	✅ Implemented	✅ Same
Custom display order	✅ Implemented	✅ Same
Sidebar visibility control	✅ Implemented	✅ Same
Permission-based access	✅ Implemented	✅ Same
Self-contained code packages	❌ Mixed throughout	✅ Isolated packages
Formal gear interface	❌ Implicit patterns	✅ Explicit interface
Gear lifecycle management	❌ Manual wiring	✅ Automated
Dynamic route registration	❌ Hardcoded in main.go	✅ Gear-provided
Gear-specific migrations	❌ Single migration set	✅ Per-gear

Current Integration Count (8 total)

Dashboard - Main overview page
Metrics - System resource monitoring (CPU, memory, disk, network)
Logs - View/search system and HAProxy logs
Services - Monitor systemd services status
Certificates - SSL/TLS certificate management
Traffic - Real-time traffic analysis
Alerts - Configurable alerting system
OS Updates - System package management

Key Files Requiring Refactoring

File	Lines	Impact	Changes Needed
`cmd/server/main.go`	~635	High	Extract gear initialization, dynamic route registration
`internal/handler/integrations.go`	~948	High	Becomes generic "gear manager"
`internal/handler/pages.go`	~500+	High	Page handlers move to gears
`internal/templates/layouts/base.templ`	~1166	Medium	Dynamic sidebar from gear registry
`internal/database/integrations.go`	~904	Medium	Rename to gears, keep config storage generic
`internal/models/permissions.go`	~366	Medium	Dynamic component registration

What You Have (HAProxy Agent)

The agent is more monolithic but shows gear-like patterns:

Pattern	Location	Adaptability
Collector pattern	`internal/collector/`	High - already interface-like
Event bus	`internal/events/bus.go`	High - pub/sub ready
Handler registration	`internal/api/server.go`	Medium - needs abstraction
Hardcoded service list	`main.go:355`, `handlers.go:114`	Low - needs consolidation

Chosen Approach: Compile-Time Gears (Caddy Pattern)

How it works: Gears are Go packages that register themselves via init(). Single binary output.

Used by: Caddy, Go's database/sql drivers, many production systems

Why this approach:

Single binary deployment - maintains current strength
Type-safe - compiler catches interface mismatches
Easy debugging - standard Go debugging works
All platforms - works on Linux, macOS, Windows
Fast - no RPC overhead, direct function calls
Simple builds - standard go build

Trade-offs accepted:

Requires recompilation to add/remove gears
All gears bundled into binary (size grows slightly)

Architecture Overview

┌─────────────────────────────────────────────────────────────────┐
│                        Single Binary                             │
├─────────────────────────────────────────────────────────────────┤
│  ┌─────────────────────────────────────────────────────────┐    │
│  │                     Framework Core                        │    │
│  │  ┌──────────┐ ┌──────────┐ ┌──────────┐ ┌──────────┐    │    │
│  │  │   Auth   │ │  Events  │ │ Database │ │   HTTP   │    │    │
│  │  └──────────┘ └──────────┘ └──────────┘ └──────────┘    │    │
│  │  ┌──────────┐ ┌──────────┐ ┌──────────────────────┐     │    │
│  │  │   UI     │ │ Gear   │ │ Shared Components    │     │    │
│  │  │ Layout   │ │ Registry │ │ (Toast, Table, etc.) │     │    │
│  │  └──────────┘ └──────────┘ └──────────────────────┘     │    │
│  └─────────────────────────────────────────────────────────┘    │
│                              │                                   │
│                    Gear Interface                              │
│                              │                                   │
│  ┌──────────┐ ┌──────────┐ ┌──────────┐ ┌──────────┐           │
│  │Dashboard │ │   Logs   │ │ Services │ │  Certs   │ ...       │
│  │  Gear  │ │  Gear  │ │  Gear  │ │  Gear  │           │
│  └──────────┘ └──────────┘ └──────────┘ └──────────┘           │
└─────────────────────────────────────────────────────────────────┘

Why This Approach?

Preserves single binary - Your current deployment strength
Matches existing patterns - Similar to your "integrations" system
Industry proven - Caddy, database/sql, many others
Type-safe - Go compiler validates gear implementations
Simple builds - Standard go build, no special tooling
Easy testing - Standard Go testing works
Good debugging - Standard Go debugging, stack traces work

Customization via Build Tags (Optional Enhancement)

For users who want smaller binaries, you can use Go build tags:

// internal/gears/logs/gear.go
//go:build gear_logs || gear_all

package logs

func init() {
    gear.Register(&LogsGear{})
}

Build commands:

# Full build with all gears
go build -tags gear_all ./cmd/server

# Minimal build with specific gears
go build -tags "gear_dashboard,gear_logs,gear_alerts" ./cmd/server

This is optional and can be added later if needed.

Directory Structure

internal/
├── framework/                    # Framework core (all shared code)
│   ├── gear/                   # Gear system
│   │   ├── interface.go
│   │   ├── registry.go
│   │   └── manager.go
│   ├── handler/                  # Core framework handlers
│   │   ├── auth.go               # Login, logout, session management
│   │   ├── profile.go            # User profile, password change
│   │   ├── users.go              # User management (admin)
│   │   ├── gears.go            # Gear manager UI (was integrations.go)
│   │   └── health.go             # Health check endpoint
│   ├── ui/                       # Shared UI components
│   │   ├── toast.templ
│   │   ├── table.templ
│   │   ├── modal.templ
│   │   ├── toggle.templ
│   │   ├── icons.templ
│   │   └── badge.templ
│   ├── templates/                # Core page templates
│   │   ├── layouts/
│   │   │   └── base.templ        # Main layout with sidebar
│   │   └── pages/
│   │       ├── login.templ
│   │       ├── profile.templ
│   │       ├── users.templ
│   │       └── gears.templ     # Gear manager page
│   ├── auth/                     # Move from internal/auth
│   ├── events/                   # Move from internal/events
│   ├── database/                 # Core DB operations
│   ├── agent/                    # Agent client
│   ├── config/                   # Configuration loading
│   └── middleware/               # Shared middleware
│
└── gears/                      # Self-contained gears
    ├── dashboard/
    ├── logs/
    ├── services/
    ├── certificates/
    ├── metrics/
    ├── traffic/
    ├── alerts/
    └── os_updates/

Each gear follows this structure:

internal/gears/logs/
├── gear.go           # Gear implementation (interface methods)
├── handlers.go         # HTTP handlers
├── collectors.go       # Data collection logic (if any)
├── templates/
│   ├── page.templ      # Main logs page
│   └── settings.templ  # Logs settings page
├── models.go           # Gear-specific types
└── README.md           # Gear documentation

Gear Interface Specification

Full Interface Definition

package gear

import (
    "context"
    "database/sql"
    "log/slog"
    "net/http"

    "github.com/a-h/templ"
    "github.com/go-chi/chi/v5"
)

// ============================================================================
// CORE INTERFACE
// ============================================================================

// Gear is the main interface all gears must implement
type Gear interface {
    // Metadata returns gear information
    Info() GearInfo

    // Lifecycle methods
    Initialize(ctx context.Context, deps Dependencies) error
    Start() error
    Stop() error

    // Health returns the current health status of the gear
    Health() HealthStatus

    // Routes registers HTTP routes for this gear
    RegisterRoutes(r chi.Router)

    // UI integration
    SidebarItem() SidebarConfig
    SettingsPage(config map[string]interface{}) templ.Component

    // Security
    Permissions() []PermissionDef

    // Database
    Migrations() []Migration
}

// ============================================================================
// SUPPORTING TYPES
// ============================================================================

// GearInfo contains metadata about a gear
type GearInfo struct {
    Name        string   // Internal identifier: "logs", "metrics"
    DisplayName string   // Shown in UI: "System Logs"
    Description string   // Detailed description
    Version     string   // Semantic version: "1.0.0"
    Icon        string   // Icon identifier
    Category    string   // "monitoring", "security", "system", "utility"
    Author      string   // Optional: "Dave"
    Website     string   // Optional: documentation URL
}

// Dependencies contains services provided by the framework
type Dependencies struct {
    DB          *sql.DB
    Logger      *slog.Logger
    EventHub    EventPublisher
    AuthManager AuthChecker
    AgentClient AgentClientInterface
    HTTPClient  *http.Client
    Config      map[string]interface{}
}

// EventPublisher allows gears to publish events
type EventPublisher interface {
    Publish(eventType string, payload interface{})
    Subscribe(eventType string, handler func(interface{}))
}

// AuthChecker allows gears to check permissions
type AuthChecker interface {
    HasPermission(r *http.Request, component, action string) bool
    CurrentUser(r *http.Request) *User
}

// AgentClientInterface for communicating with HAProxy Agent
type AgentClientInterface interface {
    Get(path string, result interface{}) error
    Post(path string, body, result interface{}) error
}

// SidebarConfig defines how the gear appears in navigation
type SidebarConfig struct {
    Path          string                // URL path: "/logs"
    Icon          templ.Component       // SVG icon component
    DefaultOrder  int                   // Default sort order (lower = higher)
    BadgeProvider func() int            // Optional: returns badge count (alerts, etc.)
    ShowAlways    bool                  // Show even when disabled (for core gears)
}

// PermissionDef defines a permission this gear uses
type PermissionDef struct {
    Component   string   // Permission component name
    Actions     []string // Available actions: "view", "configure", "manage", "action"
    Description string   // Human-readable description
}

// Migration defines a database migration
type Migration struct {
    Version     int    // Sequential version number
    Description string // What this migration does
    Up          string // SQL to apply migration
    Down        string // SQL to revert migration
}

// HealthStatus represents gear health
type HealthStatus struct {
    Status  string // "healthy", "degraded", "unhealthy"
    Message string // Optional message
}

// ============================================================================
// OPTIONAL INTERFACES (Gears can implement for additional features)
// ============================================================================

// Collector gears that collect data periodically
type CollectorGear interface {
    Gear
    Collectors() []Collector
}

// Collector defines a data collector
type Collector struct {
    Name     string
    Interval time.Duration
    Collect  func(ctx context.Context) (interface{}, error)
}

// WebSocketGear for gears that need WebSocket support
type WebSocketGear interface {
    Gear
    HandleWebSocket(conn *websocket.Conn)
}

// EventHandler for gears that react to events
type EventHandlerGear interface {
    Gear
    HandleEvent(eventType string, payload interface{})
}

// Searchable for gears that support global search
type SearchableGear interface {
    Gear
    Search(query string) []SearchResult
}

type SearchResult struct {
    Title       string
    Description string
    URL         string
    Relevance   float64
}

Framework Components to Extract

Shared UI Components

Component	Current Location	New Location	Used By
Toast notifications	`components/toast.templ`	`framework/ui/toast.templ`	All gears
Data tables	`components/table.templ`	`framework/ui/table.templ`	Logs, Alerts, Traffic
Modals/Dialogs	Inline in pages	`framework/ui/modal.templ`	All gears
Toggle switches	Inline in forms	`framework/ui/toggle.templ`	Settings pages
Icons (SVG)	`base.templ`	`framework/ui/icons.templ`	All gears
Badges	`base.templ`	`framework/ui/badge.templ`	Sidebar, Alerts
Loading spinners	Inline	`framework/ui/spinner.templ`	All gears
Empty states	Inline	`framework/ui/empty.templ`	Tables, lists
Error displays	Inline	`framework/ui/error.templ`	All gears
Metrics cards	`components/metrics.templ`	`framework/ui/metrics.templ`	Dashboard, Metrics
Charts (Chart.js)	Inline JS	`framework/ui/charts.templ`	Metrics, Traffic
Progress bars	Inline	`framework/ui/progress.templ`	OS Updates
Terminal output	OS Updates	`framework/ui/terminal.templ`	OS Updates, Logs

Shared Services

Service	Current Location	New Location	Purpose
Authentication	`internal/auth/`	`framework/auth/`	User auth, sessions
Events	`internal/events/`	`framework/events/`	Pub/sub event hub
Database base	`internal/database/`	`framework/database/`	Core DB operations
Agent client	`internal/agent/`	`framework/agent/`	Agent communication
SSE	`internal/handler/sse.go`	`framework/sse/`	Server-sent events
Config	`internal/config/`	`framework/config/`	Configuration loading

Middleware

Middleware	Purpose	Shared?
RequireAuth	Authentication check	Yes - framework
InjectGearContext	Add gear info to context	Yes - framework
PermissionCheck	Verify user permissions	Yes - framework
Timeout	Request timeout	Yes - framework
CORS	Cross-origin requests	Yes - framework
RateLimiting	Request rate limiting	Gear-specific

Migration Strategy

Backward Compatibility

Database:

Keep integrations table name (or rename transparently with migration)
Config JSON format remains compatible
No data loss during migration

Configuration:

Existing config files continue to work
New gear-specific config nested under gear name

URLs:

All existing URLs remain the same
No breaking changes to API endpoints

Migration Steps for Existing Deployments

# 1. Backup database
make backup

# 2. Pull new version
docker pull ghcr.io/sarg3nt/gearbox:latest

# 3. Run migration (automatic on startup)
# The new version detects old schema and migrates

# 4. Verify
curl http://localhost:3000/health

Rollback Plan

If issues occur:

Stop new container
Start previous version container
Database remains compatible (forward-only migrations are optional)

Pros and Cons Analysis

Pros of Gear Architecture

Benefit	Description	Impact
Clear Separation	Each gear is self-contained with its own handlers, templates, and logic	High - easier to understand, modify, and debug
Easy to Disable	Disable a gear = none of its code runs, not just hidden UI	High - cleaner than current approach
Maintainability	Bug in one gear doesn't affect others; clear ownership boundaries	High - faster debugging, safer changes
Extensibility	Adding new gears follows a clear pattern; AI agents can generate gears	High - future development is faster
Testing	Each gear can be tested in isolation	Medium - better test coverage
Documentation	Each gear has its own README; self-documenting interface	Medium - easier onboarding
Customization	Users can build custom binaries with only needed gears	Low - niche use case
Code Reuse	Framework components are clearly separated and reusable	Medium - less duplication

Cons of Gear Architecture

Drawback	Description	Mitigation
Upfront Effort	4-6 weeks of development to implement	Plan carefully, migrate incrementally
Learning Curve	Developers need to learn gear interface	Good documentation, example gears
Compile-Time Only	Can't add gears without recompilation	Acceptable for your use case
Binary Size	All gears compiled into one binary	Use build tags if size matters
Interface Rigidity	Changing gear interface requires updating all gears	Design interface carefully upfront
Complexity	More abstraction layers than current approach	Keep interface minimal
Cross-Gear Features	Features spanning multiple gears need careful design	Use events for loose coupling
Regression Risk	Large refactoring could introduce bugs	Thorough testing, staged rollout

Trade-off Analysis

Invest Now vs. Continue Current Approach:

Factor	Current Approach	Gear Architecture
Development speed (now)	Faster	Slower (refactoring)
Development speed (future)	Slowing down	Faster
Bug isolation	Poor	Good
Code organization	Degrading	Clean
New developer onboarding	Moderate	Easy
AI-assisted development	Moderate	Excellent
Technical debt	Growing	Reduced

Recommendation: The current codebase is at a good point for this refactoring - complex enough to benefit, not so complex that it's overwhelming. Waiting longer will make the migration harder.

Research Sources

Go Gear Architecture Patterns

Design patterns in Go's database/sql package - Eli Bendersky's analysis of Go's compile-time gear pattern
Gears in Go - Comprehensive overview of gear approaches
RPC-based gears in Go - HashiCorp go-gear analysis
Building a Gear System in Go - Practical guide to Go gear systems
Clean Architecture and Gears in Go - Dependency inversion with gears

Real-World Gear Systems

Caddy - Extending Caddy - Caddy's module/gear documentation
Caddy Architecture - How Caddy structures its gear system
HashiCorp go-gear - gRPC-based gear system (Terraform, Vault)
Grafana Gear SDK for Go - Grafana's approach to Go gears
Traefik Gear Development - Interpreted Go gears with Yaegi

Go Project Structure

Go Project Structure: Practices & Patterns - 2025 best practices
Go Modular Monolith - Modular architecture in Go
Interface-based Gear Architecture - Using interfaces for gears
Registry Pattern in Go - Example implementation

Go Web Development with Templ

Templ Documentation - Official templ guide
Templ Project Structure - Recommended architecture
Echo-Modarch - Modular Go SSR template
Go + Templ + HTMX - Building reactive UIs

Real-Time Updates

Live website updates with Go, SSE, and htmx - Three Dots Labs tutorial
htmx SSE Extension - Official SSE documentation
go-htmx Package - Go library with SSE support

Chi Router

go-chi/chi - Router documentation
Chi Middleware - Built-in middleware

Navigation Menu

Gear System Feasibility Study - Comprehensive Analysis

Table of Contents

Executive Summary

Current Architecture Analysis

What You Have (HAProxy Monitoring)

Current Integration Count (8 total)

Key Files Requiring Refactoring

What You Have (HAProxy Agent)

Chosen Approach: Compile-Time Gears (Caddy Pattern)

Architecture Overview

Why This Approach?

Customization via Build Tags (Optional Enhancement)

Directory Structure

Gear Interface Specification

Full Interface Definition

Framework Components to Extract

Shared UI Components

Shared Services

Middleware

Migration Strategy

Backward Compatibility

Migration Steps for Existing Deployments

Rollback Plan

Pros and Cons Analysis

Pros of Gear Architecture

Cons of Gear Architecture

Trade-off Analysis

Research Sources

Go Gear Architecture Patterns

Real-World Gear Systems

Go Project Structure

Go Web Development with Templ

Real-Time Updates

Chi Router

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Gear System Feasibility Study - Comprehensive Analysis

Table of Contents

Executive Summary

Current Architecture Analysis

What You Have (HAProxy Monitoring)

Current Integration Count (8 total)

Key Files Requiring Refactoring

What You Have (HAProxy Agent)

Chosen Approach: Compile-Time Gears (Caddy Pattern)

Architecture Overview

Why This Approach?

Customization via Build Tags (Optional Enhancement)

Directory Structure

Gear Interface Specification

Full Interface Definition

Framework Components to Extract

Shared UI Components

Shared Services

Middleware

Migration Strategy

Backward Compatibility

Migration Steps for Existing Deployments

Rollback Plan

Pros and Cons Analysis

Pros of Gear Architecture

Cons of Gear Architecture

Trade-off Analysis

Research Sources

Go Gear Architecture Patterns

Real-World Gear Systems

Go Project Structure

Go Web Development with Templ

Real-Time Updates

Chi Router