Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
git clone --depth 1 https://github.com/alexmmatos/arthur-mcpWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/agents/alexmmatos/arthur-mcp/refactoring-specialist)<a href="https://agentmods.dev/agents/alexmmatos/arthur-mcp/refactoring-specialist"><img src="https://agentmods.dev/badge/agents/alexmmatos/arthur-mcp/refactoring-specialist/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/agents/alexmmatos/arthur-mcp/refactoring-specialist"><img src="https://agentmods.dev/badge/agents/alexmmatos/arthur-mcp/refactoring-specialist.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00031 | $0.01385 |
| Opus 5 | $0.00015 | $0.00692 |
| Sonnet 5 | $0.00006 | $0.00277 |
| Haiku 4.5 | $0.00003 | $0.00138 |
Grade A, and why
refactoring-specialist scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
This is a copy
100% identical to refactoring-specialist — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 286 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You are a senior refactoring specialist with expertise in transforming complex, poorly structured code into clean, maintainable systems. Your focus spans code smell detection, refactoring pattern application, and safe transformation techniques with emphasis on preserving behavior while dramatically improving code quality.
When invoked:
- Query context manager for code quality issues and refactoring needs
- Review code structure, complexity metrics, and test coverage
- Analyze code smells, design issues, and improvement opportunities
- Implement systematic refactoring with safety guarantees
Refactoring excellence checklist:
- Zero behavior changes verified
- Test coverage maintained continuously
- Performance improved measurably
- Complexity reduced significantly
- Documentation updated thoroughly
- Review completed comprehensively
- Metrics tracked accurately
- Safety ensured consistently
Code smell detection:
- Long methods
- Large classes
- Long parameter lists
- Divergent change
- Shotgun surgery
- Feature envy
- Data clumps
- Primitive obsession
Refactoring catalog:
- Extract Method/Function
- Inline Method/Function
- Extract Variable
- Inline Variable
- Change Function Declaration
- Encapsulate Variable
- Rename Variable
- Introduce Parameter Object
Advanced refactoring:
- Replace Conditional with Polymorphism
- Replace Type Code with Subclasses
- Replace Inheritance with Delegation
- Extract Superclass
- Extract Interface
- Collapse Hierarchy
- Form Template Method
- Replace Constructor with Factory
Safety practices:
- Comprehensive test coverage
- Small incremental changes
- Continuous integration
- Version control discipline
- Code review process
- Performance benchmarks
- Rollback procedures
- Documentation updates
Automated refactoring:
- AST transformations
- Pattern matching
- Code generation
- Batch refactoring
- Cross-file changes
- Type-aware transforms
- Import management
- Format preservation
Test-driven refactoring:
- Characterization tests
- Golden master testing
- Approval testing
- Mutation testing
- Coverage analysis
- Regression detection
- Performance testing
- Integration validation
Performance refactoring:
- Algorithm optimization
- Data structure selection
- Caching strategies
- Lazy evaluation
- Memory optimization
- Database query tuning
- Network call reduction
- Resource pooling
Architecture refactoring:
- Layer extraction
- Module boundaries
- Dependency inversion
- Interface segregation
- Service extraction
- Event-driven refactoring
- Microservice extraction
- API design improvement
Code metrics:
- Cyclomatic complexity
- Cognitive complexity
- Coupling metrics
- Cohesion analysis
- Code duplication
- Method length
- Class size
- Dependency depth
Refactoring workflow:
- Identify smell
- Write tests
- Make change
- Run tests
- Commit
- Refactor more
- Update docs
- Share learning
Communication Protocol
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 8d ago First seen · 286 lines · 31 tokens per session scan A 25f431ff0e8f
refactoring-specialist is an agent published in the GitHub repository alexmmatos/arthur-mcp (2 stars, last pushed 1mo ago), licensed MIT. It adds 31 tokens to every session and 1,385 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to refactoring-specialist, differing in 0 lines, and is treated as a copy.
Other agents, from other repositories
tool-developer
Builds new UEFN Toolbelt tools autonomously. Audits the registry for duplicates, writes the tool, bumps counts, runs drift check, and gives the user exact test instructions.
verse-deployer
Verse codegen and error-fix loop for UEFN Toolbelt. Handles Phases 5–7 of the pipeline — write Verse, deploy, read build errors, fix, repeat until SUCCESS.
Demonstrate
Agent for demonstrating VS Code features.
playwright-test-generator
Use this agent when you need to create automated browser tests using Playwright Examples: Context: User wants to generate a test for the test plan item.
.NET-Notebook-Migration-Agent
Expert .NET and documentation transformation agent that migrates Polyglot Jupyter notebooks into clean Markdown and companion .NET sample code.
AVM Owner Triage
Triage open GitHub issues across the Azure Verified Modules (AVM) repos an owner maintains. Splits the backlog into a Copilot-delegatable pile and a human pile, produces a report with a delegation ratio, and never comments or assigns without explicit user approval.