feat: expand intra-method duplicate fixer to handle non-adjacent blocks

[chubes4]

Summary

• Rewrote the intra-method duplicate fixer with a structural classifier
• Language-agnostic: operates on line content, indentation levels, and gap analysis — no language parsing
• Uses median indentation to detect cross-branch duplication vs same-level repetition

Classification

Relation	Detection	Safety	Action
Adjacent	Gap is blank/comment only	Safe	Remove second block
Same-indent small gap	≤3 code lines between, same indent	Safe	Remove second block
Same-indent large gap	>3 code lines between, same indent	PlanOnly	Flag for review
Cross-branch	Different median indentation	PlanOnly	Flag with refactoring hint

Impact

Before: 1/82 findings fixable (1.2%)
After: All 82 findings generate a fix — adjacent/same-indent as Safe, cross-branch as PlanOnly

Addresses #538

[homeboy-ci]

Homeboy Results — homeboy

Audit

Failure Digest

Audit Failure Digest

• Alignment score: 0.921
• Severity counts: unknown: 3, warning: 7
• Outliers in current run: 3
• Parsed outlier entries: 3
• Drift increased: yes
• New findings since baseline: 7
  1. intra-method-duplication — Duplicated block in generate_intra_duplicate_fixes — 5 identical lines at line 134 and line 172 (intra-method-duplication::src/core/refactor/plan/generate/intra_duplicate_fixes.rs::IntraMethodDuplicate)
  2. test_coverage — Method 'generate_intra_duplicate_fixes' has no corresponding test (expected 'test_generate_intra_duplicate_fixes') (test_coverage::src/core/refactor/plan/generate/intra_duplicate_fixes.rs::MissingTestMethod)
  3. test_coverage — Test method 'test_classify_adjacent_blank_gap' references 'classify_adjacent_blank_gap' which no longer exists in the source (test_coverage::src/core/refactor/plan/generate/intra_duplicate_fixes.rs::OrphanedTest)
  4. test_coverage — Test method 'test_classify_adjacent_no_gap' references 'classify_adjacent_no_gap' which no longer exists in the source (test_coverage::src/core/refactor/plan/generate/intra_duplicate_fixes.rs::OrphanedTest)
  5. test_coverage — Test method 'test_classify_cross_branch_different_indent' references 'classify_cross_branch_different_indent' which no longer exists in the source (test_coverage::src/core/refactor/plan/generate/intra_duplicate_fixes.rs::OrphanedTest)
• Top actionable findings:
  1. src/core/refactor/plan/generate/intra_duplicate_fixes.rs — intra_method_duplicate — Duplicated block in generate_intra_duplicate_fixes — 5 identical lines at line 134 and line 172
  2. src/core/refactor/plan/generate/intra_duplicate_fixes.rs — missing_test_method — Method 'generate_intra_duplicate_fixes' has no corresponding test (expected 'test_generate_intra_duplicate_fixes')
  3. src/core/refactor/plan/generate/intra_duplicate_fixes.rs — orphaned_test — Test method 'test_classify_adjacent_blank_gap' references 'classify_adjacent_blank_gap' which no longer exists in the source
  4. src/core/refactor/plan/generate/intra_duplicate_fixes.rs — orphaned_test — Test method 'test_classify_adjacent_no_gap' references 'classify_adjacent_no_gap' which no longer exists in the source
  5. src/core/refactor/plan/generate/intra_duplicate_fixes.rs — orphaned_test — Test method 'test_classify_cross_branch_different_indent' references 'classify_cross_branch_different_indent' which no longer exists in the source

All parsed audit findings (10)

1. **src/core/refactor/plan/generate/intra_duplicate_fixes.rs** — intra_method_duplicate — Duplicated block in `generate_intra_duplicate_fixes` — 5 identical lines at line 134 and line 172
2. **src/core/refactor/plan/generate/intra_duplicate_fixes.rs** — missing_test_method — Method 'generate_intra_duplicate_fixes' has no corresponding test (expected 'test_generate_intra_duplicate_fixes')
3. **src/core/refactor/plan/generate/intra_duplicate_fixes.rs** — orphaned_test — Test method 'test_classify_adjacent_blank_gap' references 'classify_adjacent_blank_gap' which no longer exists in the source
4. **src/core/refactor/plan/generate/intra_duplicate_fixes.rs** — orphaned_test — Test method 'test_classify_adjacent_no_gap' references 'classify_adjacent_no_gap' which no longer exists in the source
5. **src/core/refactor/plan/generate/intra_duplicate_fixes.rs** — orphaned_test — Test method 'test_classify_cross_branch_different_indent' references 'classify_cross_branch_different_indent' which no longer exists in the source
6. **src/core/refactor/plan/generate/intra_duplicate_fixes.rs** — orphaned_test — Test method 'test_classify_same_indent_large_gap' references 'classify_same_indent_large_gap' which no longer exists in the source
7. **src/core/refactor/plan/generate/intra_duplicate_fixes.rs** — orphaned_test — Test method 'test_classify_same_indent_small_gap' references 'classify_same_indent_small_gap' which no longer exists in the source
8. **src/commands/docs.rs** — outlier — (outlier)
9. **tests/commands/deploy_test.rs** — outlier — (outlier)
10. **src/core/engine/undo/rollback.rs** — outlier — (outlier)

- Full audit log: https://github.com/Extra-Chill/homeboy/actions/runs/23419934041

Autofixability classification

• Overall: auto_fixable
• Autofix enabled: yes
• Autofix attempted this run: no
• Auto-fixable failed commands:
  • audit
• Failed commands with available automated fixes:
  • audit

Machine-readable artifacts

• homeboy-lint-summary.json
• homeboy-test-failures.json
• homeboy-audit-summary.json
• homeboy-autofixability.json

⚡ Scope: changed files only

❌ audit (changed files only)

Auto-refactor

ℹ️ Autofix enabled, but no fixable file changes were produced

Failure Digest

Autofixability classification

• Overall: human_needed
• Autofix enabled: yes
• Autofix attempted this run: no
• Human-needed failed commands:
  • refactor --from all

Machine-readable artifacts

• homeboy-lint-summary.json
• homeboy-test-failures.json
• homeboy-audit-summary.json
• homeboy-autofixability.json

⚡ Scope: changed files only

❌ refactor --from all

Tooling versions

• Homeboy CLI: homeboy 0.85.3+7e48300
• Extension: rust from https://github.com/Extra-Chill/homeboy-extensions
• Extension revision: unknown
• Action: Extra-Chill/homeboy-action@v2

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Homeboy Action v1