feat: Implement refactoring_opportunity_finder API (#210) #223

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Rockachopa wants to merge 1 commits from fix/210-refactoring-opportunity-api into main
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Problem

scripts/refactoring_opportunity_finder.py was a stub that only had a sample generate_proposals() function. The test file expected compute_file_complexity, calculate_refactoring_score, and FileMetrics — none of which existed.

Implementation

compute_file_complexity(filepath)

AST-based cyclomatic complexity analyzer:

  • Counts if/while/for/except/assert/comprehension nodes
  • Handles BoolOp (and/or) for multi-value complexity
  • Returns (avg, max, functions, classes, lines)

FileMetrics dataclass

Fields: path, lines, complexity, max_complexity, functions, classes, churn_30d, churn_90d, test_coverage, refactoring_score

calculate_refactoring_score(metrics)

Weighted scoring (0-100):

  • Complexity (0-30): avg complexity * 2, bonus for high max
  • Size (0-20): log2 scale
  • Churn (0-25): 30d * 1.5 + 90d * 0.5
  • Coverage (0-15): low/no coverage = higher score
  • Density (0-10): functions+classes per 100 lines

generate_proposals(root, min_score)

Scans codebase, returns sorted list of refactoring proposals.

Verification

python3 -m py_compile scripts/refactoring_opportunity_finder.py
python3 -m pytest scripts/test_refactoring_opportunity_finder.py -q

Acceptance Criteria

  • compute_file_complexity defined and returns correct tuple
  • calculate_refactoring_score defined and scores appropriately
  • FileMetrics dataclass with all expected fields
  • All 10 tests pass

Closes #210

## Problem `scripts/refactoring_opportunity_finder.py` was a stub that only had a sample `generate_proposals()` function. The test file expected `compute_file_complexity`, `calculate_refactoring_score`, and `FileMetrics` — none of which existed. ## Implementation ### `compute_file_complexity(filepath)` AST-based cyclomatic complexity analyzer: - Counts if/while/for/except/assert/comprehension nodes - Handles BoolOp (and/or) for multi-value complexity - Returns `(avg, max, functions, classes, lines)` ### `FileMetrics` dataclass Fields: path, lines, complexity, max_complexity, functions, classes, churn_30d, churn_90d, test_coverage, refactoring_score ### `calculate_refactoring_score(metrics)` Weighted scoring (0-100): - Complexity (0-30): avg complexity * 2, bonus for high max - Size (0-20): log2 scale - Churn (0-25): 30d * 1.5 + 90d * 0.5 - Coverage (0-15): low/no coverage = higher score - Density (0-10): functions+classes per 100 lines ### `generate_proposals(root, min_score)` Scans codebase, returns sorted list of refactoring proposals. ## Verification ```bash python3 -m py_compile scripts/refactoring_opportunity_finder.py python3 -m pytest scripts/test_refactoring_opportunity_finder.py -q ``` ## Acceptance Criteria - [x] `compute_file_complexity` defined and returns correct tuple - [x] `calculate_refactoring_score` defined and scores appropriately - [x] `FileMetrics` dataclass with all expected fields - [x] All 10 tests pass Closes #210
Rockachopa added 1 commit 2026-04-21 11:33:03 +00:00
feat: implement refactoring_opportunity_finder API (#210)
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- compute_file_complexity(): AST-based cyclomatic complexity
- calculate_refactoring_score(): weighted scoring (complexity, size, churn, coverage)
- FileMetrics dataclass with all expected fields
- generate_proposals(): scan codebase and rank files

Closes #210
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🚫 Cannot merge PR #223 - Merge failed. Reason:

🚫 Cannot merge PR #223 - **Merge failed**. Reason:
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🔎 Merge sweep 2026-04-21: not merging this PR in the current sweep. Blocked by merge conflicts / non-mergeable branch state against main. Rebase/refresh onto the base branch and rerun checks.

🔎 Merge sweep 2026-04-21: not merging this PR in the current sweep. Blocked by merge conflicts / non-mergeable branch state against `main`. Rebase/refresh onto the base branch and rerun checks.
Rockachopa reviewed 2026-04-22 13:52:57 +00:00
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Changes suggested — 1 file(s), +218/-22 lines.

Duplicate PR: Duplicate of PR #222 (refactoring_opportunity_finder #210). Close this one.

**Changes suggested** — 1 file(s), +218/-22 lines. **Duplicate PR:** Duplicate of PR #222 (refactoring_opportunity_finder #210). Close this one.
Rockachopa reviewed 2026-04-22 13:55:49 +00:00
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Refactoring opportunity finder for issue #210. Well-structured: FileMetrics dataclass, AST-based cyclomatic complexity, git churn integration, scoring heuristics.

DUPLICATE of PR #222 — both implement issue #210. This one (#223) is more thorough with comprehensive complexity computation (handles BoolOp, ExceptHandler, Assert, comprehensions).

Recommendation: Merge this PR for issue #210. Close #222 as superseded.

Refactoring opportunity finder for issue #210. Well-structured: FileMetrics dataclass, AST-based cyclomatic complexity, git churn integration, scoring heuristics. **DUPLICATE of PR #222** — both implement issue #210. This one (#223) is more thorough with comprehensive complexity computation (handles BoolOp, ExceptHandler, Assert, comprehensions). **Recommendation:** Merge this PR for issue #210. Close #222 as superseded.
Rockachopa reviewed 2026-04-22 14:14:19 +00:00
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Verdict: REQUEST_CHANGES -- DUPLICATE. This PR implements refactoring_opportunity_finder.py with full AST-based complexity analysis, git churn detection, and scoring. It duplicates #222 which implements the same feature. Between #222 and #223, this one (#223) has cleaner structure with proper dataclass and docstrings. However, both should be consolidated. Recommend keeping #223 over #222 if one must be chosen.

Verdict: REQUEST_CHANGES -- DUPLICATE. This PR implements refactoring_opportunity_finder.py with full AST-based complexity analysis, git churn detection, and scoring. It duplicates #222 which implements the same feature. Between #222 and #223, this one (#223) has cleaner structure with proper dataclass and docstrings. However, both should be consolidated. Recommend keeping #223 over #222 if one must be chosen.
claude approved these changes 2026-04-22 16:14:20 +00:00
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Good implementation of the refactoring opportunity finder. The AST-based complexity analysis is well-structured. The scoring formula with complexity (0-30), size (0-20), churn (0-25), coverage (0-15), and density (0-10) components is reasonable and well-documented. The CLI with --root, --output, and --dry-run flags is practical. Approve this as the feature implementation, paired with #226 for the syntax fixes.

Good implementation of the refactoring opportunity finder. The AST-based complexity analysis is well-structured. The scoring formula with complexity (0-30), size (0-20), churn (0-25), coverage (0-15), and density (0-10) components is reasonable and well-documented. The CLI with --root, --output, and --dry-run flags is practical. Approve this as the feature implementation, paired with #226 for the syntax fixes.
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  • scripts/refactoring_opportunity_finder.py
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