trekhleb/javascript-algorithms

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3 of your 27 findings came from Repobility's proprietary detections. ✓ Repobility tags below mark them.

Scan timing: clone 5.54s · analysis 10.42s · 10.1 MB · GitHub API rate-limit (preflight)

https://github.com/trekhleb/javascript-algorithms · scanned 2026-06-05 04:30 UTC (5 hours, 30 minutes ago) · 10 languages

150 findings (26 legacy + 124 scanner) 75th percentile · Javascript · medium (20-100K LoC) Scanner says 89 (lower by 12)

File as issue Image v2 schema

UNIFIED Repobility · multi-layer engine · AI coders

Complete repo analysis

Last scanned 5 hours, 30 minutes ago · v2 · 88 findings from 2 sources. Findings combine the legacy security pipeline AND the multi-layer engine (atlas, wiring, flows, ranked) AND verified AI agent contributions.

JSON

Score breakdown â 2026-05-18-v5

Component	Sub-score	Weight	Contribution
`structure_score`	85.0	0.15	12.75
`security_score`	55.0	0.25	13.75
`testing_score`	95.0	0.20	19.00
`documentation_score`	82.0	0.15	12.30
`practices_score`	82.0	0.15	12.30
`code_quality`	76.8	0.10	7.68
Overall		1.00	77.8

Severity distribution — click a segment to filter

Active filters: excluding tests × Reset all

Severity: Critical 0 High 15 Medium 7 Low 55 9-Layer: Software Security Quality Integrity Frontend Hardware Data Network Cicd Source: Legacy 26 9-layer 62 Crowd 0 Layer: Software 67 Quality 14 Api 1 Frontend 1 Security 1 Cicd 4

Exclude dismissed / FP Exclude test files

All 1231 nodes from the latest scan, grouped by kind. Each node is a unit the engine identified (file, function, endpoint, table…). Most users won't need this view — it's primarily for debugging the engine's graph extraction or for AI agents that want to enumerate the project structure.

Label	Layer	Status	Path
`README.zh-CN.md`	software	healthy	`README.zh-CN.md`
`README.es-ES.md`	software	healthy	`README.es-ES.md`
`jest.config.js`	software	warning	`jest.config.js`
`README.vi-VN.md`	software	healthy	`README.vi-VN.md`
`README.md`	software	healthy	`README.md`
`package.json`	software	healthy	`package.json`
`CONTRIBUTING.md`	software	healthy	`CONTRIBUTING.md`
`README.zh-TW.md`	software	healthy	`README.zh-TW.md`
`README.tr-TR.md`	software	healthy	`README.tr-TR.md`
`BACKERS.md`	software	healthy	`BACKERS.md`
`README.ar-AR.md`	software	healthy	`README.ar-AR.md`
`README.uz-UZ.md`	software	healthy	`README.uz-UZ.md`
`README.de-DE.md`	software	healthy	`README.de-DE.md`
`README.pt-BR.md`	software	healthy	`README.pt-BR.md`
`package-lock.json`	software	healthy	`package-lock.json`
`README.ja-JP.md`	software	healthy	`README.ja-JP.md`
`README.it-IT.md`	software	healthy	`README.it-IT.md`
`README.ru-RU.md`	software	healthy	`README.ru-RU.md`
`README.id-ID.md`	software	healthy	`README.id-ID.md`
`README.fr-FR.md`	software	healthy	`README.fr-FR.md`
`README.pl-PL.md`	software	healthy	`README.pl-PL.md`
`README.uk-UA.md`	software	healthy	`README.uk-UA.md`
`CODE_OF_CONDUCT.md`	software	healthy	`CODE_OF_CONDUCT.md`
`README.ko-KR.md`	software	healthy	`README.ko-KR.md`
`README.he-IL.md`	software	healthy	`README.he-IL.md`
`CI.yml`	software	healthy	`.github/workflows/CI.yml`
`README.md`	software	healthy	`src/playground/README.md`
`playground.js`	software	healthy	`src/playground/playground.js`
`playground.test.js`	software	healthy	`src/playground/__test__/playground.test.js`
`Comparator.js`	software	healthy	`src/utils/comparator/Comparator.js`
`Comparator.test.js`	software	warning	`src/utils/comparator/__test__/Comparator.test.js`
`README.md`	software	healthy	`src/algorithms/cryptography/polynomial-hash/README.md`
`PolynomialHash.js`	software	healthy	`src/algorithms/cryptography/polynomial-hash/PolynomialHash.…`
`SimplePolynomialHash.js`	software	healthy	`src/algorithms/cryptography/polynomial-hash/SimplePolynomia…`
`SimplePolynomialHash.test.js`	software	warning	`src/algorithms/cryptography/polynomial-hash/__test__/Simple…`
`PolynomialHash.test.js`	software	warning	`src/algorithms/cryptography/polynomial-hash/__test__/Polyno…`
`caesarCipher.js`	software	healthy	`src/algorithms/cryptography/caesar-cipher/caesarCipher.js`
`README.md`	software	healthy	`src/algorithms/cryptography/caesar-cipher/README.md`
`README.ru-RU.md`	software	healthy	`src/algorithms/cryptography/caesar-cipher/README.ru-RU.md`
`caesarCipher.test.js`	software	warning	`src/algorithms/cryptography/caesar-cipher/__test__/caesarCi…`
`README.md`	software	healthy	`src/algorithms/cryptography/rail-fence-cipher/README.md`
`railFenceCipher.js`	software	healthy	`src/algorithms/cryptography/rail-fence-cipher/railFenceCiph…`
`railFenceCipher.test.js`	software	warning	`src/algorithms/cryptography/rail-fence-cipher/__test__/rail…`
`README.md`	software	healthy	`src/algorithms/cryptography/hill-cipher/README.md`
`hillCipher.js`	software	healthy	`src/algorithms/cryptography/hill-cipher/hillCipher.js`
`hillCipher.test.js`	software	healthy	`src/algorithms/cryptography/hill-cipher/_test_/hillCipher.t…`
`README.md`	software	healthy	`src/algorithms/stack/valid-parentheses/README.md`
`validParentheses.js`	software	healthy	`src/algorithms/stack/valid-parentheses/validParentheses.js`
`validParentheses.test.js`	software	warning	`src/algorithms/stack/valid-parentheses/__test__/validParent…`
`longestCommonSubstring.js`	software	healthy	`src/algorithms/string/longest-common-substring/longestCommo…`

Showing first 50 of this kind. Full payload available via the JSON button at the top of the page.

Label	Layer	Status	Path
`playground`	software	healthy	`src/playground/playground.js:playground`
`tests`	software	healthy	`src/playground/__test__/playground.test.js:tests`
`that`	software	healthy	`src/utils/comparator/Comparator.js:that`
`doesn`	software	healthy	`src/algorithms/cryptography/polynomial-hash/SimplePolynomia…`
`is`	software	healthy	`src/algorithms/cryptography/polynomial-hash/SimplePolynomia…`
`getCipherMap`	software	healthy	`src/algorithms/cryptography/caesar-cipher/caesarCipher.js:g…`
`encryptedCharIndex`	software	healthy	`src/algorithms/cryptography/caesar-cipher/caesarCipher.js:e…`
`caesarCipherEncrypt`	software	healthy	`src/algorithms/cryptography/caesar-cipher/caesarCipher.js:c…`
`caesarCipherDecrypt`	software	healthy	`src/algorithms/cryptography/caesar-cipher/caesarCipher.js:c…`
`buildFence`	software	healthy	`src/algorithms/cryptography/rail-fence-cipher/railFenceCiph…`
`getNextDirection`	software	healthy	`src/algorithms/cryptography/rail-fence-cipher/railFenceCiph…`
`addCharToRail`	software	healthy	`src/algorithms/cryptography/rail-fence-cipher/railFenceCiph…`
`onEachRail`	software	healthy	`src/algorithms/cryptography/rail-fence-cipher/railFenceCiph…`
`fillEncodeFence`	software	healthy	`src/algorithms/cryptography/rail-fence-cipher/railFenceCiph…`
`fillDecodeFence`	software	healthy	`src/algorithms/cryptography/rail-fence-cipher/railFenceCiph…`
`decodeFence`	software	healthy	`src/algorithms/cryptography/rail-fence-cipher/railFenceCiph…`
`encodeRailFenceCipher`	software	healthy	`src/algorithms/cryptography/rail-fence-cipher/railFenceCiph…`
`decodeRailFenceCipher`	software	healthy	`src/algorithms/cryptography/rail-fence-cipher/railFenceCiph…`
`generateKeyMatrix`	software	healthy	`src/algorithms/cryptography/hill-cipher/hillCipher.js:gener…`
`charCodeShifted`	software	healthy	`src/algorithms/cryptography/hill-cipher/hillCipher.js:charC…`
`generateMessageVector`	software	healthy	`src/algorithms/cryptography/hill-cipher/hillCipher.js:gener…`
`hillCipherEncrypt`	software	healthy	`src/algorithms/cryptography/hill-cipher/hillCipher.js:hillC…`
`hillCipherDecrypt`	software	healthy	`src/algorithms/cryptography/hill-cipher/hillCipher.js:hillC…`
`invalidCharacterInMessage`	software	healthy	`src/algorithms/cryptography/hill-cipher/_test_/hillCipher.t…`
`invalidCharacterInKeyString`	software	healthy	`src/algorithms/cryptography/hill-cipher/_test_/hillCipher.t…`
`invalidLengthOfKeyString`	software	healthy	`src/algorithms/cryptography/hill-cipher/_test_/hillCipher.t…`
`isValid`	software	healthy	`src/algorithms/stack/valid-parentheses/validParentheses.js:…`
`longestCommonSubstring`	software	healthy	`src/algorithms/string/longest-common-substring/longestCommo…`
`buildZArray`	software	healthy	`src/algorithms/string/z-algorithm/zAlgorithm.js:buildZArray`
`zAlgorithm`	software	healthy	`src/algorithms/string/z-algorithm/zAlgorithm.js:zAlgorithm`
`buildPatternTable`	software	healthy	`src/algorithms/string/knuth-morris-pratt/knuthMorrisPratt.j…`
`knuthMorrisPratt`	software	healthy	`src/algorithms/string/knuth-morris-pratt/knuthMorrisPratt.j…`
`rabinKarp`	software	healthy	`src/algorithms/string/rabin-karp/rabinKarp.js:rabinKarp`
`regularExpressionMatching`	software	healthy	`src/algorithms/string/regular-expression-matching/regularEx…`
`isPalindrome`	software	healthy	`src/algorithms/string/palindrome/isPalindrome.js:isPalindro…`
`levenshteinDistance`	software	healthy	`src/algorithms/string/levenshtein-distance/levenshteinDista…`
`hammingDistance`	software	healthy	`src/algorithms/string/hamming-distance/hammingDistance.js:h…`
`compareStringsOfDifferentLength`	software	healthy	`src/algorithms/string/hamming-distance/__test__/hammingDist…`
`recursiveStaircaseMEM`	software	healthy	`src/algorithms/uncategorized/recursive-staircase/recursiveS…`
`getSteps`	software	healthy	`src/algorithms/uncategorized/recursive-staircase/recursiveS…`
`recursiveStaircaseBF`	software	healthy	`src/algorithms/uncategorized/recursive-staircase/recursiveS…`
`recursiveStaircaseIT`	software	healthy	`src/algorithms/uncategorized/recursive-staircase/recursiveS…`
`recursiveStaircaseDP`	software	healthy	`src/algorithms/uncategorized/recursive-staircase/recursiveS…`
`hanoiTowerRecursive`	software	healthy	`src/algorithms/uncategorized/hanoi-tower/hanoiTower.js:hano…`
`hanoiTower`	software	healthy	`src/algorithms/uncategorized/hanoi-tower/hanoiTower.js:hano…`
`squareMatrixRotation`	software	healthy	`src/algorithms/uncategorized/square-matrix-rotation/squareM…`
`backtrackingJumpGame`	software	healthy	`src/algorithms/uncategorized/jump-game/backtrackingJumpGame…`
`dpBottomUpJumpGame`	software	healthy	`src/algorithms/uncategorized/jump-game/dpBottomUpJumpGame.j…`
`greedyJumpGame`	software	healthy	`src/algorithms/uncategorized/jump-game/greedyJumpGame.js:gr…`
`dpTopDownJumpGame`	software	healthy	`src/algorithms/uncategorized/jump-game/dpTopDownJumpGame.js…`

Showing first 50 of this kind. Full payload available via the JSON button at the top of the page.

Label	Layer	Status	Path
`.github`	software	healthy	`.github`
`workflows`	software	healthy	`.github/workflows`
`src`	software	healthy	`src`
`playground`	software	healthy	`src/playground`
`__test__`	software	healthy	`src/playground/__test__`
`utils`	software	healthy	`src/utils`
`comparator`	software	healthy	`src/utils/comparator`
`__test__`	software	healthy	`src/utils/comparator/__test__`
`algorithms`	software	healthy	`src/algorithms`
`cryptography`	software	healthy	`src/algorithms/cryptography`
`polynomial-hash`	software	healthy	`src/algorithms/cryptography/polynomial-hash`
`__test__`	software	healthy	`src/algorithms/cryptography/polynomial-hash/__test__`
`caesar-cipher`	software	healthy	`src/algorithms/cryptography/caesar-cipher`
`__test__`	software	healthy	`src/algorithms/cryptography/caesar-cipher/__test__`
`rail-fence-cipher`	software	healthy	`src/algorithms/cryptography/rail-fence-cipher`
`__test__`	software	healthy	`src/algorithms/cryptography/rail-fence-cipher/__test__`
`hill-cipher`	software	healthy	`src/algorithms/cryptography/hill-cipher`
`_test_`	software	healthy	`src/algorithms/cryptography/hill-cipher/_test_`
`stack`	software	healthy	`src/algorithms/stack`
`valid-parentheses`	software	healthy	`src/algorithms/stack/valid-parentheses`
`__test__`	software	healthy	`src/algorithms/stack/valid-parentheses/__test__`
`string`	software	healthy	`src/algorithms/string`
`longest-common-substring`	software	healthy	`src/algorithms/string/longest-common-substring`
`__test__`	software	healthy	`src/algorithms/string/longest-common-substring/__test__`
`z-algorithm`	software	healthy	`src/algorithms/string/z-algorithm`
`__test__`	software	healthy	`src/algorithms/string/z-algorithm/__test__`
`knuth-morris-pratt`	software	healthy	`src/algorithms/string/knuth-morris-pratt`
`__test__`	software	healthy	`src/algorithms/string/knuth-morris-pratt/__test__`
`rabin-karp`	software	healthy	`src/algorithms/string/rabin-karp`
`__test__`	software	healthy	`src/algorithms/string/rabin-karp/__test__`
`regular-expression-matching`	software	healthy	`src/algorithms/string/regular-expression-matching`
`__test__`	software	healthy	`src/algorithms/string/regular-expression-matching/__test__`
`palindrome`	software	healthy	`src/algorithms/string/palindrome`
`__test__`	software	healthy	`src/algorithms/string/palindrome/__test__`
`levenshtein-distance`	software	healthy	`src/algorithms/string/levenshtein-distance`
`__test__`	software	healthy	`src/algorithms/string/levenshtein-distance/__test__`
`hamming-distance`	software	healthy	`src/algorithms/string/hamming-distance`
`__test__`	software	healthy	`src/algorithms/string/hamming-distance/__test__`
`uncategorized`	software	healthy	`src/algorithms/uncategorized`
`recursive-staircase`	software	healthy	`src/algorithms/uncategorized/recursive-staircase`
`__test__`	software	healthy	`src/algorithms/uncategorized/recursive-staircase/__test__`
`hanoi-tower`	software	healthy	`src/algorithms/uncategorized/hanoi-tower`
`__test__`	software	healthy	`src/algorithms/uncategorized/hanoi-tower/__test__`
`square-matrix-rotation`	software	healthy	`src/algorithms/uncategorized/square-matrix-rotation`
`__test__`	software	healthy	`src/algorithms/uncategorized/square-matrix-rotation/__test__`
`jump-game`	software	healthy	`src/algorithms/uncategorized/jump-game`
`__test__`	software	healthy	`src/algorithms/uncategorized/jump-game/__test__`
`unique-paths`	software	healthy	`src/algorithms/uncategorized/unique-paths`
`__test__`	software	healthy	`src/algorithms/uncategorized/unique-paths/__test__`
`best-time-to-buy-sell-stocks`	software	healthy	`src/algorithms/uncategorized/best-time-to-buy-sell-stocks`

Showing first 50 of this kind. Full payload available via the JSON button at the top of the page.

Label	Layer	Status	Path
`Comparator`	software	healthy	`src/utils/comparator/Comparator.js:Comparator`
`PolynomialHash`	software	healthy	`src/algorithms/cryptography/polynomial-hash/PolynomialHash.…`
`SimplePolynomialHash`	software	healthy	`src/algorithms/cryptography/polynomial-hash/SimplePolynomia…`
`QueenPosition`	software	healthy	`src/algorithms/uncategorized/n-queens/QueenPosition.js:Quee…`
`of`	software	healthy	`src/algorithms/ml/k-means/kMeans.js:of`
`has`	software	healthy	`src/algorithms/ml/k-means/kMeans.js:has`
`of`	software	healthy	`src/algorithms/ml/knn/kNN.js:of`
`index`	software	healthy	`src/algorithms/ml/knn/kNN.js:index`
`in`	software	healthy	`src/algorithms/ml/knn/kNN.js:in`
`with`	software	healthy	`src/algorithms/ml/knn/kNN.js:with`
`KnapsackItem`	software	healthy	`src/algorithms/sets/knapsack-problem/KnapsackItem.js:Knapsa…`
`Knapsack`	software	healthy	`src/algorithms/sets/knapsack-problem/Knapsack.js:Knapsack`
`Sort`	software	healthy	`src/algorithms/sorting/Sort.js:Sort`
`SortTester`	software	healthy	`src/algorithms/sorting/SortTester.js:SortTester`
`RadixSort`	software	healthy	`src/algorithms/sorting/radix-sort/RadixSort.js:RadixSort`
`CountingSort`	software	healthy	`src/algorithms/sorting/counting-sort/CountingSort.js:Counti…`
`QuickSort`	software	healthy	`src/algorithms/sorting/quick-sort/QuickSort.js:QuickSort`
`QuickSortInPlace`	software	healthy	`src/algorithms/sorting/quick-sort/QuickSortInPlace.js:Quick…`
`ShellSort`	software	healthy	`src/algorithms/sorting/shell-sort/ShellSort.js:ShellSort`
`HeapSort`	software	healthy	`src/algorithms/sorting/heap-sort/HeapSort.js:HeapSort`
`MergeSort`	software	healthy	`src/algorithms/sorting/merge-sort/MergeSort.js:MergeSort`
`InsertionSort`	software	healthy	`src/algorithms/sorting/insertion-sort/InsertionSort.js:Inse…`
`SelectionSort`	software	healthy	`src/algorithms/sorting/selection-sort/SelectionSort.js:Sele…`
`BubbleSort`	software	healthy	`src/algorithms/sorting/bubble-sort/BubbleSort.js:BubbleSort`
`ComplexNumber`	software	healthy	`src/algorithms/math/complex-number/ComplexNumber.js:Complex…`
`FourierTester`	software	healthy	`src/algorithms/math/fourier-transform/__test__/FourierTeste…`
`for`	software	healthy	`src/algorithms/graph/bridges/graphBridges.js:for`
`VisitMetadata`	software	healthy	`src/algorithms/graph/bridges/graphBridges.js:VisitMetadata`
`for`	software	healthy	`src/algorithms/graph/articulation-points/articulationPoints…`
`VisitMetadata`	software	healthy	`src/algorithms/graph/articulation-points/articulationPoints…`
`TrieNode`	software	healthy	`src/data-structures/trie/TrieNode.js:TrieNode`
`Trie`	software	healthy	`src/data-structures/trie/Trie.js:Trie`
`below`	software	healthy	`src/data-structures/lru-cache/LRUCache.js:below`
`LinkedListNode`	software	healthy	`src/data-structures/lru-cache/LRUCache.js:LinkedListNode`
`LRUCache`	software	healthy	`src/data-structures/lru-cache/LRUCache.js:LRUCache`
`LRUCacheOnMap`	software	healthy	`src/data-structures/lru-cache/LRUCacheOnMap.js:LRUCacheOnMap`
`Stack`	software	healthy	`src/data-structures/stack/Stack.js:Stack`
`DoublyLinkedList`	software	healthy	`src/data-structures/doubly-linked-list/DoublyLinkedList.js:…`
`DoublyLinkedListNode`	software	healthy	`src/data-structures/doubly-linked-list/DoublyLinkedListNode…`
`Queue`	software	healthy	`src/data-structures/queue/Queue.js:Queue`
`BinaryTreeNode`	software	healthy	`src/data-structures/tree/BinaryTreeNode.js:BinaryTreeNode`
`RedBlackTree`	software	healthy	`src/data-structures/tree/red-black-tree/RedBlackTree.js:Red…`
`FenwickTree`	software	healthy	`src/data-structures/tree/fenwick-tree/FenwickTree.js:Fenwic…`
`BinarySearchTree`	software	healthy	`src/data-structures/tree/binary-search-tree/BinarySearchTre…`
`BinarySearchTreeNode`	software	healthy	`src/data-structures/tree/binary-search-tree/BinarySearchTre…`
`AvlTree`	software	healthy	`src/data-structures/tree/avl-tree/AvlTree.js:AvlTree`
`SegmentTree`	software	healthy	`src/data-structures/tree/segment-tree/SegmentTree.js:Segmen…`
`MinHeap`	software	healthy	`src/data-structures/heap/MinHeap.js:MinHeap`
`MaxHeap`	software	healthy	`src/data-structures/heap/MaxHeap.js:MaxHeap`
`MinHeapAdhoc`	software	healthy	`src/data-structures/heap/MinHeapAdhoc.js:MinHeapAdhoc`

Showing first 50 of this kind. Full payload available via the JSON button at the top of the page.

Label	Layer	Status	Path
`repobility-clone-2w24dvre`	software	healthy	`/tmp/repobility-clone-2w24dvre`

Label	Layer	Status	Path
`gha::CI`	cicd	healthy	`.github/workflows/CI.yml`

Label	Layer	Status	Path
`test`	cicd	healthy	`.github/workflows/CI.yml`

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trekhleb/javascript-algorithms

Complete repo analysis

file 50+

function 50+

directory 50+

class 50+

repo 1

pipeline 1

job 1