cqfn/aibolit

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A Static Analyzer for Java Powered by Machine Learning: Identifies Anti-Patterns Begging for Refactoring

Stars: 112
Forks: 57
Open beginner issues: 0
Indexed issues: 49
Avg merge: 1d 4h
Merged PRs (30d): 22

Dominant language: Java
License: MIT
Last GitHub push: Sep 18, 2026
Latest indexed: Sep 15, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
Beginner labels: help wanted good first issue

Beginner friendly Everything

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49 open issues indexed

NPathMetric Maven mode should stage source files using path-safe relative names Open

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

cqfn/aibolit#1344 · 1 comment · Opened Jul 29, 2026
03-calculate-metrics.py should handle an empty PMD result set Open

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

cqfn/aibolit#1343 · 1 comment · Opened Jul 29, 2026
03-calculate-metrics.py should not analyze its own _tmp directory Open

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

cqfn/aibolit#1342 · 1 comment · Opened Jul 29, 2026
03-calculate-metrics.py should create _tmp before writing PMD reports Open

Difficulty 1/5 Under an hour Newbie friendliness 86/100

cqfn/aibolit#1341 · 1 comment · Opened Jul 29, 2026
Ignore annotations should not duplicate identical findings Open

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

cqfn/aibolit#1340 · 1 comment · Opened Jul 29, 2026
CLI help/version should not require catboost Open

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

cqfn/aibolit#1339 · 1 comment · Opened Jul 29, 2026
README: use correct PATTERNS.md filename consistently Open

Difficulty 1/5 Under an hour Newbie friendliness 92/100

cqfn/aibolit#1336 · 1 comment · Opened Jul 27, 2026
PATTERNS.md: pattern codes are listed out of numeric order and inconsistently formatted Open

Difficulty 1/5 1-3 hours Newbie friendliness 82/100

cqfn/aibolit#1333 · 1 comment · Opened Jul 27, 2026
Add a `category` field to pattern metadata (no severity yet) Open

Difficulty 4/5 3-5 days Newbie friendliness 68/100

cqfn/aibolit#1331 · Opened Jul 27, 2026
Add SARIF output format support (--format=sarif) Open

Difficulty 3/5 1-2 days Newbie friendliness 68/100

cqfn/aibolit#1330 · Opened Jul 27, 2026
ty check fails in CI and local builds due to pre-release status and unresolved imports Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

cqfn/aibolit#1320 · 3 comments · Opened Jul 22, 2026
Fix typos in Java examples inside PATTERNS.md Open

Difficulty 1/5 Under an hour Newbie friendliness 92/100

cqfn/aibolit#1296 · Opened Jul 19, 2026
Add Java code example for P30 (Protected method) in PATTERNS.md Open

Difficulty 1/5 Under an hour Newbie friendliness 78/100

cqfn/aibolit#1293 · Opened Jul 19, 2026
Add Java code example for P4 (ErClass) in PATTERNS.md Open

Difficulty 1/5 Under an hour Newbie friendliness 90/100

cqfn/aibolit#1289 · Opened Jul 19, 2026
There are multiple CI workflows just for style checking Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 45/100

cqfn/aibolit#955 · Opened Oct 14, 2025
Make MvnFreeNPathMetric report NPath values for each method in each class of a file Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

cqfn/aibolit#952 · 1 comment · Opened Oct 10, 2025
Dependency Dashboard Open

Difficulty 5/5 Over a week Newbie friendliness 15/100

cqfn/aibolit#907 · Opened Oct 1, 2025
`ty` is pre-release software and not ready for production use Open

enhancement

Difficulty 2/5 1-3 hours Newbie friendliness 58/100

cqfn/aibolit#896 · 5 comments · Opened Sep 16, 2025
Halstead volume metric tests fail due to maven use not declared in config Open

bug good-title help wanted

Difficulty 3/5 1-2 days Newbie friendliness 45/100

cqfn/aibolit#853 · 11 comments · Opened Jul 7, 2025
Inconsistent Interface Contracts for Metrics/Patterns (AST vs. Filepath) Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 42/100

cqfn/aibolit#813 · 9 comments · 1 reaction · Opened Jun 7, 2025
`recommend` command fails when `xml` format is specified Open

bug good first issue help wanted

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

cqfn/aibolit#811 · 5 comments · Opened Jun 7, 2025
`xcop` ignores `.xcop` configuration and raises error when using virtual environment Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 45/100

cqfn/aibolit#697 · 14 comments · Opened May 21, 2025
Unit tests performance issue due to inefficient minimal working example extraction Open

bug good-title help wanted

Difficulty 4/5 3-5 days Newbie friendliness 48/100

cqfn/aibolit#696 · 5 comments · Opened May 21, 2025
Inconsistencies and lack of readability in `scripts/` directory code Open

bug good-title

Difficulty 4/5 3-5 days Newbie friendliness 25/100

cqfn/aibolit#683 · 5 comments · Opened May 16, 2025
Provide API for decomposing and merging AST Open

enhancement

cqfn/aibolit#540 · 1 assignee · Opened Jul 20, 2020
AST framework documentation. Open

documentation

cqfn/aibolit#539 · 1 assignee · Opened Jul 20, 2020
Refactor 'Cognitive Complexity' metric to new `ASTNode` API. Open

enhancement refactoring

cqfn/aibolit#536 · 1 assignee · Opened Jul 20, 2020
Refactor 18 patterns Open

enhancement refactoring

cqfn/aibolit#528 · 3 comments · 1 reaction · 2 assignees · Opened Jul 20, 2020
Require minimum score Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 32/100

cqfn/aibolit#463 · 2 comments · Opened Jun 29, 2020
Github action to review pull requests Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

cqfn/aibolit#454 · 1 comment · Opened Jun 26, 2020
Multi-target recommendations Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

cqfn/aibolit#438 · 1 comment · Opened Jun 20, 2020
New dataset Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 20/100

cqfn/aibolit#434 · 1 comment · Opened Jun 20, 2020
Make dependency graph Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

cqfn/aibolit#433 · 1 comment · Opened Jun 20, 2020
List of variables and read/write statements Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 30/100

cqfn/aibolit#432 · 1 comment · Opened Jun 20, 2020
CFG of class' method Open

role/DEV scope

cqfn/aibolit#431 · 2 comments · 1 assignee · Opened Jun 20, 2020
Design methods & classes to calculate CFG Open

enhancement

cqfn/aibolit#418 · 1 assignee · Opened Jun 18, 2020
P20_7 Var declaration distance: count statemtnts instead of lines Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

cqfn/aibolit#366 · 2 comments · Opened May 28, 2020
non_final_argument.py:14-17: Implement NonFinalArgument... Open

pdd

Difficulty 2/5 Under an hour Newbie friendliness 72/100

cqfn/aibolit#349 · 2 comments · Opened May 25, 2020
report.xsd Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 48/100

cqfn/aibolit#344 · 2 comments · Opened May 22, 2020
external_methods_called.py:27-31: Implement external... Open

role/DEV scope waiting

Difficulty 2/5 Under an hour Newbie friendliness 30/100

cqfn/aibolit#286 · 13 comments · Opened May 13, 2020
local_methods_calls.py:27-31: Implement local method... Open

role/DEV scope

Difficulty 2/5 Under an hour Newbie friendliness 63/100

cqfn/aibolit#285 · 6 comments · Opened May 13, 2020
mutable_index.py:13-16: Implement MutableIndex pattern We... Open

role/DEV scope

Difficulty 2/5 Under an hour Newbie friendliness 57/100

cqfn/aibolit#283 · 4 comments · Opened May 13, 2020
bidirect_index.py:12-17: Implement bidirect index pattern... Open

role/DEV scope

Difficulty 2/5 Under an hour Newbie friendliness 38/100

cqfn/aibolit#282 · 5 comments · Opened May 13, 2020
Max diameter metric can't handle file with Unicode Open

bug

cqfn/aibolit#280 · 6 comments · 1 assignee · Opened May 12, 2020
Metric: Cohesion Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

cqfn/aibolit#182 · 2 comments · Opened Apr 8, 2020
Suggest new Quality Metrics of Java classes. Open

discussion enhancement

Difficulty 5/5 Over a week Newbie friendliness 15/100

cqfn/aibolit#166 · 14 comments · Opened Apr 6, 2020
class_variable pattern Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 52/100

cqfn/aibolit#161 · 5 comments · Opened Apr 3, 2020
class_inheritance pattern Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

cqfn/aibolit#150 · 1 comment · Opened Apr 1, 2020
Check Null: Improvement Open

waiting

Difficulty 3/5 1-2 days Newbie friendliness 35/100

cqfn/aibolit#116 · 14 comments · Opened Mar 26, 2020

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