Home / leonardomso / 33-js-concepts
AI Slop Code Risk Monitor

leonardomso/33-js-concepts

SlopCodeMonitor badge for leonardomso/33-js-concepts Adjusted legacy signal; badge bands: 25 / 50 / 75 (different from dashboard bands).

📜 33 JavaScript concepts every developer should know.

2.5 Low pattern signal View on GitHub

Open-Source Code Quality, Security and Technical Debt Review

This report summarizes scanner evidence for leonardomso/33-js-concepts, a JavaScript project with 66,530 GitHub stars. SynthScan examined 60,861 lines of code across 93 source files, recording 83 pattern matches distributed across 6 syntactic categories. The legacy adjusted pattern signal is 2.5 (Low pattern signal); it is not an authorship estimate.

Use the findings to ask whether maintainers can explain intent, verify dependencies, simplify unnecessary scaffolding, and focus review effort. Risk Payload v1 adds ownership, supply-chain, over-engineering, and review-effort vectors when available. These are prompts for human verification, not probabilities, security findings, or measured maintenance costs.

2.5
Adjusted Signal
2.5
Raw Pattern Score
100%
Time Factor
2026-10-21
Last Push
66.5K
Stars
JavaScript
Language
60.9K
Lines of Code
93
Files
83
Pattern Hits
2026-10-31
Scan Date
0.00
HC Hit Rate

Risk Review · Payload v1

Use each vector to guide manual verification of the underlying findings.

Payload schema: 1.0.0 · Engine: 2.0.0 · Scoring: heuristic-density-v1 · Scan date: 2026-10-31.

Cognitive Ownership Risk 11.0/100 · LOW

Can maintainers explain intent, assumptions, and trade-offs? 75 finding(s).

Hallucinated Dependency & Supply Chain Risk 0.8/100 · LOW

Are imports declared and package/API names verified? 8 finding(s).

Agent Over-Engineering Ratio 0.0/100 · LOW

Are wrappers, guards, and repeated structures necessary? 0 finding(s).

PR Review Velocity Impact 6.7/100 · LOW

Which changes need focused human review? 83 finding(s).

What These Metrics Mean

Adjusted Signal
Legacy pattern score normalized per 1,000 scanned lines and multiplied by the repository-level time factor. It is not an estimate of AI authorship.
Raw Pattern Score
Sum of severity- and context-weighted pattern findings before applying the time factor.
Time Factor
A coarse multiplier based on repository last-push metadata. It does not identify when individual code was written.
Pattern Hits
Count of configured pattern findings. Review each location and surrounding code before acting.
HC Hit Rate
High- and critical-severity findings per scanned file. Severity is a configured detector weight, not proof of a vulnerability or authorship.
Lines / Files
Scan coverage denominators used by the legacy normalized score.

Pattern-Signal History

This chart tracks the legacy adjusted pattern score across scan runs. Changes can reflect source changes, scan coverage, or detector/scoring versions; they do not measure AI adoption or prove that a team refactored code. Compare runs only when their scoring versions are compatible. The dashed line tracks the raw pattern-hit count.

Severity Breakdown

Groups findings by configured severity weight. Severity is not a confidence estimate, security rating, or proof that a package is missing. Verify imports against the project's manifests and inspect each finding in its local design context.

CRITICAL 0HIGH 0MEDIUM 1LOW 82

Directory Score Breakdown

This horizontal bar chart shows where configured pattern scores accumulate across directories. Treat the bars as locations to inspect, not as evidence of authorship or code quality. Use the file-level findings to decide whether a directory needs a focused ownership, dependency, complexity, or review check.

Pattern Findings

The scanner identified 83 distinct pattern matches across 6 syntactic categories. Each entry below represents a discrete location in the source code where the engine recorded a detector match to inspect in context. Expand any category row to inspect the individual file paths, line numbers, code snippets, and the lexical context (CODE, COMMENT, or STRING) in which each match was detected.

Reading the findings table: The Severity column indicates the configured finding weight (CRITICAL / HIGH / MEDIUM / LOW). The Context column identifies whether the match occurred inside executable code, an inline comment, or a string literal — legacy comment-context matches receive a ×1.5 score weight. The ⚡ bolt icon marks clustered matches: three or more patterns within a 10-line window, each receiving an additional ×1.5 density multiplier under the legacy scoring model.

Structural Annotation Overuse48 hits · 100 pts
SeverityFileLineSnippetContext
LOW⚡.opencode/skill/write-concept/SKILL.md253// Step 1: Do thisCOMMENT
LOW⚡.opencode/skill/write-concept/SKILL.md256// Step 2: Then thisCOMMENT
LOW⚡.opencode/skill/write-concept/SKILL.md259// Step 3: FinallyCOMMENT
LOW⚡.opencode/skill/write-concept/SKILL.md1062// Step 1: fetch() returns a Promise that resolves to a Response objectCOMMENT
LOW⚡.opencode/skill/write-concept/SKILL.md1065// Step 2: When the response arrives, we get a Response objectCOMMENT
LOW⚡.opencode/skill/write-concept/SKILL.md1069 // Step 3: The body is a stream, we need to parse itCOMMENT
LOW⚡.opencode/skill/write-concept/SKILL.md1073 // Step 4: Now we have the actual dataCOMMENT
LOW.opencode/skill/concept-workflow/SKILL.md383### Step 1: InitializeCOMMENT
LOW.opencode/skill/concept-workflow/SKILL.md393### Step 2: Execute Each PhaseCOMMENT
LOW.opencode/skill/concept-workflow/SKILL.md417### Step 3: Final ReportCOMMENT
LOW.opencode/skill/seo-review/SKILL.md33### Step 1: Identify Target KeywordsCOMMENT
LOW⚡.opencode/skill/seo-review/SKILL.md50### Step 2: On-Page SEO AuditCOMMENT
LOW⚡.opencode/skill/seo-review/SKILL.md54### Step 3: Featured Snippet OptimizationCOMMENT
LOW⚡.opencode/skill/seo-review/SKILL.md58### Step 4: Internal Linking AuditCOMMENT
LOW⚡.opencode/skill/seo-review/SKILL.md62### Step 5: Generate ReportCOMMENT
LOW.opencode/skill/resource-curator/SKILL.md293### Step 1: Check Each LinkCOMMENT
LOW⚡.opencode/skill/resource-curator/SKILL.md308### Step 2: Content VerificationCOMMENT
LOW⚡.opencode/skill/resource-curator/SKILL.md317### Step 3: Description ReviewCOMMENT
LOW⚡.opencode/skill/resource-curator/SKILL.md326### Step 4: Gap AnalysisCOMMENT
LOW⚡…amentals/equality-operators/equality-operators.test.js146 // Step 1: Evaluate ![]COMMENT
LOW⚡…amentals/equality-operators/equality-operators.test.js151 // Step 2: Now we have [] == falseCOMMENT
LOW⚡…amentals/equality-operators/equality-operators.test.js155 // Step 3: Object → PrimitiveCOMMENT
LOW⚡…amentals/equality-operators/equality-operators.test.js159 // Step 4: String → NumberCOMMENT
LOW⚡…nted/this-call-apply-bind/this-call-apply-bind.test.js1222 // Step 1: Create empty objectCOMMENT
LOW⚡…nted/this-call-apply-bind/this-call-apply-bind.test.js1225 // Step 2: Link prototype if it's an objectCOMMENT
LOW⚡…nted/this-call-apply-bind/this-call-apply-bind.test.js1230 // Step 3: Bind this and executeCOMMENT
LOW⚡…nted/this-call-apply-bind/this-call-apply-bind.test.js1233 // Step 4: Return object (unless constructor returns a non-primitive)COMMENT
LOW⚡…rogramming/map-reduce-filter/map-reduce-filter.test.js770 // Step 1: Get boolean results for each elementCOMMENT
LOW⚡…rogramming/map-reduce-filter/map-reduce-filter.test.js773 // Step 2: Filter using the boolean resultsCOMMENT
LOW⚡.claude/skills/write-concept/SKILL.md253// Step 1: Do thisCOMMENT
LOW⚡.claude/skills/write-concept/SKILL.md256// Step 2: Then thisCOMMENT
LOW⚡.claude/skills/write-concept/SKILL.md259// Step 3: FinallyCOMMENT
LOW⚡.claude/skills/write-concept/SKILL.md1062// Step 1: fetch() returns a Promise that resolves to a Response objectCOMMENT
LOW⚡.claude/skills/write-concept/SKILL.md1065// Step 2: When the response arrives, we get a Response objectCOMMENT
LOW⚡.claude/skills/write-concept/SKILL.md1069 // Step 3: The body is a stream, we need to parse itCOMMENT
LOW⚡.claude/skills/write-concept/SKILL.md1073 // Step 4: Now we have the actual dataCOMMENT
LOW.claude/skills/concept-workflow/SKILL.md383### Step 1: InitializeCOMMENT
LOW.claude/skills/concept-workflow/SKILL.md393### Step 2: Execute Each PhaseCOMMENT
LOW.claude/skills/concept-workflow/SKILL.md417### Step 3: Final ReportCOMMENT
LOW.claude/skills/seo-review/SKILL.md33### Step 1: Identify Target KeywordsCOMMENT
LOW⚡.claude/skills/seo-review/SKILL.md50### Step 2: On-Page SEO AuditCOMMENT
LOW⚡.claude/skills/seo-review/SKILL.md54### Step 3: Featured Snippet OptimizationCOMMENT
LOW⚡.claude/skills/seo-review/SKILL.md58### Step 4: Internal Linking AuditCOMMENT
LOW⚡.claude/skills/seo-review/SKILL.md62### Step 5: Generate ReportCOMMENT
LOW.claude/skills/resource-curator/SKILL.md293### Step 1: Check Each LinkCOMMENT
LOW⚡.claude/skills/resource-curator/SKILL.md308### Step 2: Content VerificationCOMMENT
LOW⚡.claude/skills/resource-curator/SKILL.md317### Step 3: Description ReviewCOMMENT
LOW⚡.claude/skills/resource-curator/SKILL.md326### Step 4: Gap AnalysisCOMMENT
Verbosity Indicators10 hits · 22 pts
SeverityFileLineSnippetContext
LOW⚡…amentals/equality-operators/equality-operators.test.js146 // Step 1: Evaluate ![]COMMENT
LOW⚡…amentals/equality-operators/equality-operators.test.js151 // Step 2: Now we have [] == falseCOMMENT
LOW⚡…amentals/equality-operators/equality-operators.test.js155 // Step 3: Object → PrimitiveCOMMENT
LOW⚡…amentals/equality-operators/equality-operators.test.js159 // Step 4: String → NumberCOMMENT
LOW⚡…nted/this-call-apply-bind/this-call-apply-bind.test.js1222 // Step 1: Create empty objectCOMMENT
LOW⚡…nted/this-call-apply-bind/this-call-apply-bind.test.js1225 // Step 2: Link prototype if it's an objectCOMMENT
LOW⚡…nted/this-call-apply-bind/this-call-apply-bind.test.js1230 // Step 3: Bind this and executeCOMMENT
LOW⚡…nted/this-call-apply-bind/this-call-apply-bind.test.js1233 // Step 4: Return object (unless constructor returns a non-primitive)COMMENT
LOW⚡…rogramming/map-reduce-filter/map-reduce-filter.test.js770 // Step 1: Get boolean results for each elementCOMMENT
LOW⚡…rogramming/map-reduce-filter/map-reduce-filter.test.js773 // Step 2: Filter using the boolean resultsCOMMENT
Overly Generic Function Names12 hits · 12 pts
SeverityFileLineSnippetContext
LOW…amentals/scope-and-closures/scope-and-closures.test.js26 function processData() {CODE
LOW…amentals/primitives-objects/primitives-objects.test.js775 function processData(data) {CODE
LOW…jects-properties/object-methods/object-methods.test.js524 function processData(data) {CODE
LOW…erformance/memory-management/memory-management.test.js220 function processData() {CODE
LOW…erformance/memory-management/memory-management.test.js314 function getData(obj) {CODE
LOW…erformance/memory-management/memory-management.test.js452 function processData() {CODE
LOW…formance/garbage-collection/garbage-collection.test.js141 function processData() {CODE
LOWtests/async-javascript/callbacks/callbacks.test.js832 function getData(callback) {CODE
LOWtests/async-javascript/callbacks/callbacks.test.js839 function processData(data, callback) {CODE
LOWtests/async-javascript/callbacks/callbacks.test.js1044 function getData(key, callback) {CODE
LOWtests/async-javascript/callbacks/callbacks.test.js1088 function getData(key, callback) {CODE
LOW…ts/functions-execution/async-await/async-await.test.js854 async function getData() {CODE
Fake / Example Data8 hits · 10 pts
SeverityFileLineSnippetContext
LOW…cts-properties/weakmap-weakset/weakmap-weakset.test.js254 expect(getFullName(person)).toBe('John Doe')CODE
LOW…cts-properties/weakmap-weakset/weakmap-weakset.test.js257 expect(getFullName(person)).toBe('John Doe')CODE
LOW⚡…topics/regular-expressions/regular-expressions.test.js231 const match = '555-1234'.match(pattern)CODE
LOW⚡…topics/regular-expressions/regular-expressions.test.js232 expect(match[0]).toBe('555-1234')CODE
LOW⚡…topics/regular-expressions/regular-expressions.test.js239 const match = '555-1234'.match(pattern)CODE
LOW…topics/regular-expressions/regular-expressions.test.js291 expect(email.test('user@example.com')).toBe(true)CODE
LOW…/functions-execution/iife-modules/iife-modules.test.js741 authModule.login('user@example.com')CODE
LOW…/functions-execution/iife-modules/iife-modules.test.js742 expect(authModule.getCurrentUser().email).toBe('user@example.com')CODE
Over-Commented Block4 hits · 4 pts
SeverityFileLineSnippetContext
LOWtests/beyond/browser-storage/cookies/cookies.test.js1import { describe, it, expect } from 'vitest'COMMENT
LOW…/advanced-topics/error-handling/error-handling.test.js541 // The following patterns from the concept page are browser-specificCOMMENT
LOWtests/async-javascript/callbacks/callbacks.test.js1241 setTimeout(() => output.push('D'), 0)COMMENT
LOWdocs/robots.txt1# Belt-and-suspenders robots.txt for 33jsconcepts.comCOMMENT
AI Slop Vocabulary1 hit · 3 pts
SeverityFileLineSnippetContext
MEDIUM…ged-template-literals/tagged-template-literals.test.js330 // More robust key extraction - handles the actual string splittingCOMMENT