Refine plugin marketplace for launch readiness

Plugin Scope Improvements:
- Remove language-specialists plugin (not task-focused)
- Split specialized-domains into 5 focused plugins:
  * blockchain-web3 - Smart contract development only
  * quantitative-trading - Financial modeling and trading only
  * payment-processing - Payment gateway integration only
  * game-development - Unity and Minecraft only
  * accessibility-compliance - WCAG auditing only
- Split business-operations into 3 focused plugins:
  * business-analytics - Metrics and reporting only
  * hr-legal-compliance - HR and legal docs only
  * customer-sales-automation - Support and sales workflows only
- Fix infrastructure-devops scope:
  * Remove database concerns (db-migrate, database-admin)
  * Remove observability concerns (observability-engineer)
  * Move slo-implement to incident-response
  * Focus purely on container orchestration (K8s, Docker, Terraform)
- Fix customer-sales-automation scope:
  * Remove content-marketer (unrelated to customer/sales workflows)

Marketplace Statistics:
- Total plugins: 27 (was 22)
- Tool coverage: 100% (42/42 tools referenced)
- Fat plugins removed: 3 (language-specialists, specialized-domains, business-operations)
- All plugins now have clear, focused tasks

Model Migration:
- Migrate all 42 tools from claude-sonnet-4-0/opus-4-1 to model: sonnet
- Migrate all 15 workflows from claude-opus-4-1 to model: sonnet
- Use short model syntax consistent with agent files

Documentation Updates:
- Update README.md with refined plugin structure
- Update plugin descriptions to be task-focused
- Remove anthropomorphic and marketing language
- Improve category organization (now 16 distinct categories)

Ready for October 9, 2025 @ 9am PST launch

tools/accessibility-audit.md

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 # Accessibility Audit and Testing

tools/ai-assistant.md

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-model: claude-sonnet-4-0
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 # AI Assistant Development

tools/ai-review.md

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 # AI/ML Code Review

tools/api-mock.md

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-model: claude-sonnet-4-0
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 # API Mocking Framework

tools/api-scaffold.md

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-model: claude-sonnet-4-0
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 # API Scaffold Generator

tools/code-explain.md

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-model: claude-sonnet-4-0
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 # Code Explanation and Analysis

tools/code-migrate.md

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-model: claude-sonnet-4-0
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 # Code Migration Assistant

tools/compliance-check.md

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 # Regulatory Compliance Check

tools/config-validate.md

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-model: claude-sonnet-4-0
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 # Configuration Validation

tools/context-restore.md

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-model: claude-sonnet-4-0
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 Restore saved project context for agent coordination:

tools/context-save.md

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-model: claude-sonnet-4-0
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 Save current project context for future agent coordination:

tools/cost-optimize.md

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-model: claude-sonnet-4-0
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 # Cloud Cost Optimization

tools/data-pipeline.md

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-model: claude-sonnet-4-0
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 # Data Pipeline Architecture

tools/data-validation.md

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-model: claude-sonnet-4-0
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 # Data Validation Pipeline

tools/db-migrate.md

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-model: claude-sonnet-4-0
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 # Database Migration Strategy and Implementation

tools/debug-trace.md

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-model: claude-sonnet-4-0
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 # Debug and Trace Configuration

tools/deploy-checklist.md

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-model: claude-sonnet-4-0
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 # Deployment Checklist and Configuration

tools/deps-audit.md

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-model: claude-sonnet-4-0
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 # Dependency Audit and Security Analysis

tools/deps-upgrade.md

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-model: claude-sonnet-4-0
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 # Dependency Upgrade Strategy

tools/doc-generate.md

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-model: claude-sonnet-4-0
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 # Automated Documentation Generation

tools/docker-optimize.md

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-model: claude-sonnet-4-0
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 # Docker Optimization

tools/error-analysis.md

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-model: claude-sonnet-4-0
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 # Error Analysis and Resolution

tools/error-trace.md

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-model: claude-sonnet-4-0
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 # Error Tracking and Monitoring

tools/issue.md

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-model: claude-sonnet-4-0
+model: sonnet
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 Please analyze and fix the GitHub issue: $ARGUMENTS.

tools/k8s-manifest.md

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-model: claude-sonnet-4-0
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 # Kubernetes Manifest Generation

tools/langchain-agent.md

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-model: claude-sonnet-4-0
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 # LangChain/LangGraph Agent Scaffold

tools/monitor-setup.md

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-model: claude-sonnet-4-0
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 # Monitoring and Observability Setup

tools/multi-agent-optimize.md

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-model: claude-sonnet-4-0
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 Optimize application stack using specialized optimization agents:

tools/multi-agent-review.md

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-model: claude-sonnet-4-0
+model: sonnet
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 Perform comprehensive multi-agent code review with specialized reviewers:

tools/onboard.md

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-model: claude-sonnet-4-0
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 # Onboard

tools/pr-enhance.md

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 # Pull Request Enhancement

tools/prompt-optimize.md

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-model: claude-sonnet-4-0
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 # AI Prompt Optimization

tools/refactor-clean.md

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 # Refactor and Clean Code

tools/security-scan.md

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-model: claude-sonnet-4-0
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 # Security Scan and Vulnerability Assessment

tools/slo-implement.md

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-model: claude-sonnet-4-0
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 # SLO Implementation Guide

tools/smart-debug.md

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-model: claude-sonnet-4-0
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 Debug complex issues using specialized debugging agents:

tools/standup-notes.md

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-model: claude-sonnet-4-0
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 # Standup Notes Generator

tools/tdd-green.md

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-model: claude-sonnet-4-0
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 Implement minimal code to make failing tests pass in TDD green phase:

tools/tdd-red.md

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-model: claude-sonnet-4-0
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 Write comprehensive failing tests following TDD red phase principles:

tools/tdd-refactor.md

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-model: claude-opus-4-1
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 Refactor code with confidence using comprehensive test safety net:

tools/tech-debt.md

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 # Technical Debt Analysis and Remediation

tools/test-harness.md

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-model: claude-sonnet-4-0
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 # Comprehensive Test Harness Generator