docker-swarm-termina/PRD.md

Planning Guide

A secure container management dashboard that displays active containers and enables administrators to launch interactive shell sessions with credential-based authentication.

Experience Qualities:

1. Authoritative - Professional security-focused interface that conveys control and system oversight
2. Efficient - Streamlined workflows with minimal clicks from viewing containers to accessing shells
3. Technical - Terminal-inspired aesthetics that resonate with developer and operations audiences

Complexity Level: Light Application (multiple features with basic state) This is a focused management tool with authentication, container listing, and shell interaction—multiple coordinated features but not extensive state management beyond session auth.

Essential Features

Authentication Gate

• Functionality: Username and password validation against configured credentials
• Purpose: Protect container access from unauthorized users
• Trigger: User loads the application without valid session
• Progression: Login form display → Credential input → Validation → Dashboard access or error feedback
• Success criteria: Valid credentials grant access; invalid credentials show clear error; session persists across page refreshes

Container List View

• Functionality: Display all active containers with key metadata (name, image, status, uptime)
• Purpose: Provide visibility into running container infrastructure
• Trigger: Successful authentication or app load with valid session
• Progression: Dashboard load → Fetch container data → Render container cards → Auto-refresh every 10 seconds
• Success criteria: All active containers visible with accurate real-time data; clear empty state when no containers exist

Interactive Shell Access

• Functionality: Launch terminal session within selected container
• Purpose: Enable debugging, inspection, and administration tasks
• Trigger: User clicks "Open Shell" action on a container card
• Progression: Container selection → Shell modal opens → Terminal initializes → User interacts with container shell → Close to return to dashboard
• Success criteria: Terminal displays container shell prompt; commands execute and return output; session closes cleanly

Session Management

• Functionality: Logout capability and session timeout handling
• Purpose: Security and access control
• Trigger: User clicks logout or session expires
• Progression: Logout action → Clear session → Return to login screen
• Success criteria: User can explicitly log out; returns to login without residual access

Edge Case Handling

• No Active Containers: Display friendly empty state with icon and helpful message
• Authentication Failure: Clear error messaging without exposing security details
• Container Stops Mid-Session: Terminal shows disconnection message, returns user to dashboard
• Network Interruption: Loading states and retry mechanisms for data fetching
• Malformed Credentials: Input validation and sanitization before submission

Design Direction

The design should evoke precision, technical competence, and security. Think command-line interfaces elevated to GUI form—monospace typography, high contrast, structured layouts with clear information hierarchy. The aesthetic should feel like a professional operations dashboard: serious, focused, and trustworthy.

Color Selection

A dark, terminal-inspired palette with high-contrast accents for critical actions and status indicators.

• Primary Color: Deep slate blue oklch(0.25 0.02 250) - Commands authority and technical sophistication, used for primary actions
• Secondary Colors:
  • Dark charcoal background oklch(0.15 0.01 250) - Reduces eye strain for prolonged monitoring
  • Slate gray surfaces oklch(0.22 0.015 250) - Cards and elevated elements
• Accent Color: Electric cyan oklch(0.75 0.15 195) - High-visibility accent for interactive elements and status indicators
• Foreground/Background Pairings:
  • Background (Dark Charcoal oklch(0.15 0.01 250)): Light cyan text oklch(0.92 0.02 195) - Ratio 7.2:1 ✓
  • Primary (Deep Slate oklch(0.25 0.02 250)): White text oklch(0.98 0 0) - Ratio 8.5:1 ✓
  • Accent (Electric Cyan oklch(0.75 0.15 195)): Dark text oklch(0.15 0.01 250) - Ratio 6.1:1 ✓
  • Card (Slate Gray oklch(0.22 0.015 250)): Light cyan text oklch(0.92 0.02 195) - Ratio 6.8:1 ✓

Font Selection

Typography should evoke terminal interfaces while maintaining excellent readability—monospace for technical data and code, geometric sans-serif for UI labels.

• Typographic Hierarchy:
  • H1 (Page Title): JetBrains Mono Bold/32px/tight tracking (-0.02em)
  • H2 (Section Headers): Space Grotesk SemiBold/24px/normal tracking
  • H3 (Container Names): JetBrains Mono Medium/18px/normal tracking
  • Body (Metadata): Space Grotesk Regular/14px/relaxed leading (1.6)
  • Code/Terminal: JetBrains Mono Regular/14px/normal leading (1.5)
  • Labels: Space Grotesk Medium/12px/wide tracking (0.02em)

Animations

Animations should be crisp and purposeful, reinforcing the technical, responsive nature of the interface.

• Terminal modal: Scale up from 0.95 with fade, 250ms ease-out
• Container cards: Subtle hover lift (2px translate-y) with 150ms ease
• Status indicators: Pulse animation for active/running state
• Login form: Shake animation on authentication error
• Data refresh: Subtle opacity pulse on container list update
• Button interactions: Quick scale (0.98) on press, 100ms

Component Selection

• Components:

  • Card - Container display with metadata, modified with border-l accent for status
  • Button - Primary actions (login, open shell, logout) with variant customization
  • Input - Credential fields with secure password masking
  • Dialog - Full-screen terminal modal overlay
  • Badge - Status indicators (running, healthy, error states)
  • Separator - Visual dividers between container metadata sections
  • ScrollArea - Container list and terminal output scrolling
  • Alert - Error messages and system notifications

• Customizations:

  • Terminal component: Custom component using monospace font and scrollable output area
  • Container card: Custom status indicator with colored left border
  • Auth layout: Custom centered card with gradient background overlay

• States:

  • Buttons: Default slate, hover electric cyan glow, active pressed, disabled muted
  • Inputs: Default with subtle border, focus with cyan ring, error with red border
  • Cards: Default elevation-1, hover elevation-2 with cyan accent glow
  • Terminal: Active (connected) vs disconnected states with visual feedback

• Icon Selection:

  • Container: Package - represents containerized applications
  • Shell/Terminal: Terminal - universal terminal symbol
  • Status running: Play - active operation
  • Status stopped: Pause or Stop - inactive state
  • Login: LockKey - security and authentication
  • Logout: SignOut - session termination
  • Refresh: ArrowClockwise - data reload
  • Error: Warning - alert states

• Spacing:

  • Page padding: p-6 (desktop), p-4 (mobile)
  • Card padding: p-6
  • Card gaps: gap-4
  • Section spacing: space-y-6
  • Button padding: px-6 py-3
  • Form field spacing: space-y-4
  • Container grid gap: gap-4

• Mobile:

  • Container grid: 1 column on mobile, 2 on tablet (768px+), 3 on desktop (1024px+)
  • Terminal modal: Full screen on mobile with close button in header
  • Header: Stack logo and logout button vertically on small screens
  • Auth form: Full width on mobile (max-w-sm) with reduced padding
  • Metadata: Stack container info vertically on mobile, horizontal on desktop