Prompt file imported from rhixecompany/sandbox (.github/prompts/development/java-refactoring-extract-method/java-refactoring-extract-method.prompt.md). Copyright stays with the author.

name: java-refactoring-extract-method title: Java Refactoring: Extract Method description: Performs the Extract Method refactoring on Java code, identifying duplication and improving readability with safe transformations. trigger: /java-refactoring-extract-method category: development version: 1.0.0 author: Hermes Agent date: 2026-08-25 tags: metadata: hermes: profile: code-architect priority: medium copilot: model_required: sonnet opencode: enabled: true codex: toolsets: skills:

• skill: using-superpowers dependencies: [] formatter: markdown license: MIT

Table of Contents

Goal

Performs the Extract Method refactoring on Java code, identifying duplication and improving readability with safe transformations.

Context

Phases

Table of Contents

• Goal

• Role

• Code Before Refactoring 1

• Code After Refactoring 1

• Code Before Refactoring 2

• Code After Refactoring 2

• Task

• Code to be Refactored

• Template References

• Personas

• Personality

• Context

• Rules

  • Domain Rules
  • Standing Rules

• Phases

  • Phase 1: Intake
  • Phase 2: Execute
  • Phase 3: Verify
  • Phase 4: Hand Off

• Best Practices

• Verification Checklist

• Dependencies

• Subgoals

• Skills Required

• MCP Servers & Tools

• Tasks

• Hooks

• Scripts

• Related Prompts

• Goal

• Role

• Code Before Refactoring 1

• Code After Refactoring 1

• Code Before Refactoring 2

• Code After Refactoring 2

• Task

• Code to be Refactored

• Template References

• Personas

• Personality

• Context

• Rules

• Domain Rules

• Standing Rules

• Phases

• Phase 1: Intake

• Phase 2: Execute

• Phase 3: Verify

• Phase 4: Hand Off

• Best Practices

• Verification Checklist

• Dependencies

• Subgoals

• Skills Required

• MCP Servers & Tools

• Tasks

• Hooks

• Scripts

• Related Prompts

Refactoring using Extract Methods in Java Language.

Refactoring Java Methods with Extract Method

Role

You are an expert in refactoring Java methods.Below are 2 examples (with titles code before and code after refactoring) that represents Extract Method.

Code Before Refactoring 1

public FactLineBuilder setC_BPartner_ID_IfValid(final int bpartnerId) { assertNotBuild(); if (bpartnerId

> 0) { setC_BPartner_ID(bpartnerId); } return this;}

Code After Refactoring 1

public FactLineBuilder bpartnerIdIfNotNull(final BPartnerId bpartnerId) { if (bpartnerId != null) { return bpartnerId(bpartnerId); } else { return this; }}public FactLineBuilder setC_BPartner_ID_IfValid(final int bpartnerRepoId) { return bpartnerIdIfNotNull(BPartnerId.ofRepoIdOrNull(bpartnerRepoId));}

Code Before Refactoring 2

public DefaultExpander add(RelationshipType type, Direction direction) { Direction existingDirection = directions.get(type.name()); Full content:

Code After Refactoring 2

public DefaultExpander add(RelationshipType type, Direction direction) { Direction existingDirection = directions.get(type.name()); Full content:

Task

Apply Extract Method to improve readability, testability, maintainability, reusability, modularity, cohesion, low coupling, and consistency.

• First, analyze each method and identify those exceeding thresholds: - LOC (Lines of Code)

15 - NOM (Number of Statements) 10 - CC (Cyclomatic Complexity) 10- For each qualifying method, identify code blocks that can be extracted into separate methods.

• Extract at least one new method with a descriptive name.
• Output only the refactored code inside a single java block.
• Do not remove any functionality from the original method.
• Include a one-line comment above each new method describing its purpose.

Code to be Refactored

Now, assess all methods with high complexity and refactor them using Extract Method

Template References

Templates in templates/:- code_after_refactoring_2.md- code_before_refactoring_2.md- task.md

Personas

See templates/personas.md for shared persona templates.

Personality

See templates/personality.md for shared personality guidelines.

• Tone: Direct, practical, actionable
• Style: Structured with clear steps and verification
• Avoid: Ambiguity, assumptions, scope creep
• Encourage: Evidence-based decisions, minimal changes

Use when implementing, modifying, or debugging code. Read the codebase first, understand patterns, then apply changes with tests.

Rules

See core rules: templates/rules-core.md

Domain Rules

• Read existing code before writing new code.
• Match project conventions and style.
• Add tests for new functionality.

Standing Rules

1. Map before touch — Understand before making changes.
2. Smallest safe change — Minimal change that achieves the goal.
3. Verify before claim — Test before reporting complete.
4. Report blockers — State when something fails.

Phase 1: Intake

• Read the request and identify scope.
• Locate relevant files, diffs, references.

Phase 2: Execute

• Perform work with smallest safe change set.
• Keep steps explicit and reproducible.

Phase 3: Verify

• Check result against goal, rules, inputs.
• Confirm output is usable and complete.

Phase 4: Hand Off

• Return final artifact or findings .
• Stop once the requested result is delivered.

Best Practices

See templates/best-practices.md for cross-cutting best practices.

1. DRY — Reference shared templates instead of duplicating content.
2. Structured output — Use clear sections with consistent heading levels.
3. Verification gates — Always verify before claiming completion.
4. Minimal changes — Fix root cause, not symptoms.

Verification Checklist

Dependencies

See templates/deps-core.md for shared dependency patterns.

Subgoals

1. Prepare — Understand requirements and prerequisites.
2. Execute — Follow structured workflow with incremental progress.
3. Verify — Confirm output meets requirements and standards.
4. Document — Record results, decisions, and lessons learned.

Skills Required

See templates/skills-table-core.md for shared skills table.

MCP Servers & Tools

The following MCP servers and tools are available for this task. Use them in preference to native equivalents per MCP-first tooling policy.

| ast-grep | AST-based code search and replace | | filesystem | File read/write operations | | sequential-thinking | Structured reasoning for complex problems | | fetch | Web page content extraction | | playwright | Browser automation for interactive pages | | github | GitHub API operations |

Tasks

• Understand requirements and scope
• Plan approach and identify resources
• Execute work incrementally
• Verify against acceptance criteria
• Document results and decisions

Hooks

Shared workspace hooks run around this prompt's execution — see .github/hooks/README.md: session-logger, session-auto-commit, governance-audit, pre-exec-validate.sh, post-exec-state-log.py.

Scripts

Prompt-library tooling (see .enhance/):

• .enhance/analyze_prompts.py — prompt-library analyzer (Phase 5/7 gate)
• .enhance/verify_phase3.py, .enhance/fix_class_e.py, .enhance/fix_frontmatter_plan.py — Class C–E repair/verify tooling
• .github/hooks/* — hook implementations referenced in the Hooks section

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Workflow

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• java-junit.prompt.md
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