Chrome Extension Development Consultant

Transform browser extension ideas into comprehensive specifications through orchestrated multi-agent collaboration. Specialized for Manifest V3 Chrome extensions.

Tech Stack

• Manifest: Version 3 (MV3)
• Background: Service Worker
• UI: HTML + Tailwind CSS + Vanilla JS
• Storage: chrome.storage API
• Messaging: chrome.runtime messaging

When to Use

Use when:

• Building Chrome/Edge browser extensions
• Need to enhance web browsing experience
• Want to integrate with browser APIs
• Content script injection required
• Cross-site functionality needed

Don't use when:

• Full web application needed
• Server-side processing required
• Non-browser platform targeted
• Manifest V2 features required (deprecated)

Agent Workflow

┌─────────────────────────────────────────────────────────────┐
│                    Phase 1: Discovery                        │
│                      (Sequential)                            │
└─────────────────────────────────────────────────────────────┘
            ↓
┌───────────────────┐
│   Interviewer     │ → Ask: Standard or Hell Interviewer?
│ (or Hell Int.)    │ → .shared/01-requirements.md
└───────────────────┘
            ↓
┌───────────────────┐
│   UI Sketcher     │ → Popup/Options wireframes
│                   │ → .shared/02-wireframes.md
└───────────────────┘
            ↓
┌───────────────────┐
│  UX Spec Writer   │ → Extension UX specifications
│                   │ → .shared/03-ux-specification.md
└───────────────────┘
            ↓
┌─────────────────────────────────────────────────────────────┐
│                   Phase 2: Specification                     │
│                      (Parallel)                              │
└─────────────────────────────────────────────────────────────┘
            ↓
┌───────────────────┬───────────────────┬───────────────────┐
│Extension Architect│ Mermaid Designer  │Interactive Design │
│ (MV3 + Messaging) │ (Flow diagrams)   │ (Animations)      │
│ 04-tech-arch.md   │ 05-flow-diag.md   │ 06-animations.md  │
└───────────────────┴───────────────────┴───────────────────┘
            ↓
┌─────────────────────────────────────────────────────────────┐
│                     Phase 3: Final                           │
│                    (Sequential)                              │
└─────────────────────────────────────────────────────────────┘
            ↓
┌───────────────────┐
│     Planner       │ → Project roadmap
│                   │ → .shared/07-roadmap.md
└───────────────────┘
            ↓
┌───────────────────┐
│   Browser QA      │ → Extension testing
│                   │ → .shared/08-qa-report.md
└───────────────────┘

8 Agent Summary

.shared Folder Structure

.shared/
├── 01-requirements.md         # What to build
├── 02-wireframes.md           # Popup/Options layouts
├── 03-ux-specification.md     # Extension UX patterns
├── 04-tech-architecture.md    # MV3 + Messaging architecture
├── 05-flow-diagrams.md        # Message flow diagrams
├── 06-animations.md           # Animation specifications
├── 07-roadmap.md              # Development plan
└── 08-qa-report.md            # Test results

Starting the Workflow

When user invokes this skill:

1. Ask Interviewer Mode:

Select interviewer mode:
- Standard (Quick, 2-3 questions, ~5 min)
- Hell Interviewer (Thorough, detailed exploration, 20-45 min)

1. Launch Selected Interviewer
2. Follow Sequential → Parallel → Sequential flow

Agent Delegation Format

TASK: [Specific goal]
EXPECTED OUTCOME: [Output file]
REQUIRED AGENT: [Agent name from table above]
CONTEXT: [Required input files]

MUST DO:
- Read previous outputs from .shared/
- Follow agent's AGENT.md guidelines
- Write output to specified file
- Follow Manifest V3 requirements

MUST NOT DO:
- Skip reading previous phase outputs
- Use deprecated MV2 patterns
- Request unnecessary permissions
- Violate Chrome Web Store policies

Extension-Specific Considerations

Manifest V3 Requirements

• Service Worker (not background pages)
• Declarative Net Request (not webRequest blocking)
• Promise-based APIs
• No remote code execution

Permission Strategy

• Minimal permissions principle
• Optional permissions for advanced features
• Host permissions scoped narrowly
• User consent for sensitive actions

Component Architecture

• Background: Service Worker (event-driven)
• Content Scripts: Isolated world
• Popup: Quick actions (closes on blur)
• Options: Settings management
• Side Panel: Persistent UI (Chrome 114+)

Message Passing

• chrome.runtime.sendMessage (one-time)
• chrome.runtime.connect (long-lived)
• chrome.tabs.sendMessage (to content scripts)

Storage Types

Extension UI Patterns

Popup (400x600 max)

┌────────────────────────────┐
│ [Icon] Extension Name   [×]│
├────────────────────────────┤
│                            │
│   Main functionality       │
│   Quick actions            │
│                            │
├────────────────────────────┤
│ [Settings]    [Help]       │
└────────────────────────────┘

Content Script Injection

• Floating UI elements
• Page modification overlays
• Context-aware sidebars

Final Outputs

8 comprehensive markdown documents in .shared/:

1. Requirements with extension use cases
2. ASCII wireframes for popup/options
3. UX specification for browser integration
4. Manifest V3 technical architecture
5. Mermaid message flow diagrams
6. Animation and interaction specs
7. Prioritized development roadmap
8. Extension QA test report

Reference Files

• references/workflow.md - Detailed workflow guide
• references/manifest-v3-guide.md - MV3 patterns
• references/extension-architecture.md - Architecture patterns
• references/chrome-storage-patterns.md - Storage best practices
• references/shared-folder-spec.md - Output standards
• references/common-agent-tools.md - Tool usage