AI Slop Code Risk Monitor

jashkenas/underscore

Name: jashkenas/underscore — JavaScript Code Quality & Security Review | AI Slop Code Risk Monitor
Creator: AI Slop Code Risk Monitor

Adjusted legacy signal; badge bands: 25 / 50 / 75 (different from dashboard bands).

JavaScript's utility _ belt

0.2 Low pattern signal View on GitHub

Open-Source Code Quality, Security and Technical Debt Review

This report summarizes scanner evidence for jashkenas/underscore, a JavaScript project with 27,306 GitHub stars. SynthScan examined 196,437 lines of code across 364 source files, recording 44 pattern matches distributed across 2 syntactic categories. The legacy adjusted pattern signal is 0.2 (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.

0.2

Adjusted Signal

0.2

Raw Pattern Score

100%

Time Factor

2026-10-15

Last Push

27.3K

Stars

JavaScript

Language

196.4K

Lines of Code

364

Files

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 1.1/100 · LOW

Can maintainers explain intent, assumptions, and trade-offs? 44 finding(s).

Hallucinated Dependency & Supply Chain Risk 0.0/100 · LOW

Are imports declared and package/API names verified? 0 finding(s).

Agent Over-Engineering Ratio 0.1/100 · LOW

Are wrappers, guards, and repeated structures necessary? 5 finding(s).

PR Review Velocity Impact 1.1/100 · LOW

Which changes need focused human review? 44 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 0LOW 44

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 44 distinct pattern matches across 2 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.

Over-Commented Block39 hits · 39 pts

Severity	File	Line	Snippet	Context
LOW	underscore-umd.js	441	// While the algorithm could run to arbitrary comparison depth in	COMMENT
LOW	underscore-min.js	1	!function(n,r){"object"==typeof exports&&"undefined"!=typeof module?module.exports=r():"function"==typeof define&&define	COMMENT
LOW	underscore-umd-min.js	1	!function(n,r){"object"==typeof exports&&"undefined"!=typeof module?module.exports=r():"function"==typeof define&&define	COMMENT
LOW	underscore-esm-min.js	1	// Underscore.js 1.13.8	COMMENT
LOW	underscore-esm.js	361	var id = ++idCounter + '';	COMMENT
LOW	underscore-esm.js	441	// The following loop is the hot loop, so we keep it as light as	COMMENT
LOW	test/collections.js	861	var alphabet = 'abcdefghijklmnopqrstuvwxyz';	COMMENT
LOW	docs/modules/underscore.html	921	// We run a script at page load to inject the links after the fact.	COMMENT
LOW	docs/modules/contains.html	881	<script>	COMMENT
LOW	docs/modules/union.html	881	// We run a script at page load to inject the links after the fact.	COMMENT
LOW	docs/modules/last.html	881	// We run a script at page load to inject the links after the fact.	COMMENT
LOW	docs/modules/functions.html	881	<script>	COMMENT
LOW	docs/modules/propertyOf.html	881	<script>	COMMENT
LOW	docs/modules/toPath.html	881	// We run a script at page load to inject the links after the fact.	COMMENT
LOW	docs/modules/_cb.html	881	<script>	COMMENT
LOW	docs/modules/delay.html	881	// We run a script at page load to inject the links after the fact.	COMMENT
LOW	docs/modules/_baseCreate.html	901	<script>	COMMENT
LOW	docs/modules/keys.html	901	// We run a script at page load to inject the links after the fact.	COMMENT
LOW	docs/modules/find.html	881	<script>	COMMENT
LOW	docs/modules/countBy.html	881	// We run a script at page load to inject the links after the fact.	COMMENT
LOW	docs/modules/iteratee.html	881	<script>	COMMENT
LOW	docs/modules/noop.html	861	<script>	COMMENT
LOW	docs/modules/max.html	901	// We run a script at page load to inject the links after the fact.	COMMENT
LOW	docs/modules/_createSizePropertyCheck.html	881	// We run a script at page load to inject the links after the fact.	COMMENT
LOW	docs/modules/clone.html	881	// We run a script at page load to inject the links after the fact.	COMMENT
LOW	docs/modules/min.html	901	// We run a script at page load to inject the links after the fact.	COMMENT
LOW	docs/modules/range.html	881	// We run a script at page load to inject the links after the fact.	COMMENT
LOW	docs/modules/times.html	881	// We run a script at page load to inject the links after the fact.	COMMENT
LOW	docs/modules/indexOf.html	881	// We run a script at page load to inject the links after the fact.	COMMENT
LOW	docs/modules/_createEscaper.html	901	<script>	COMMENT
LOW	docs/modules/_tagTester.html	881	// We run a script at page load to inject the links after the fact.	COMMENT
LOW	docs/modules/templateSettings.html	881	// We run a script at page load to inject the links after the fact.	COMMENT
LOW	docs/modules/first.html	881	// We run a script at page load to inject the links after the fact.	COMMENT
LOW	.github/workflows/codeql-analysis.yml	1	# For most projects, this workflow file will not need changing; you simply need	COMMENT
LOW	.github/workflows/codeql-analysis.yml	61	# Autobuild attempts to build any compiled languages (C/C++, C#, or Java).	COMMENT
LOW	modules/isEqual.js	81	// While the algorithm could run to arbitrary comparison depth in	COMMENT
LOW	modules/index-all.js	1	// ESM Exports	COMMENT
LOW	modules/index.js	1	// Named Exports	COMMENT
LOW	modules/index-default.js	1	// Default Export	COMMENT

Hyper-Verbose Identifiers5 hits · 5 pts

Severity	File	Line	Snippet	Context
LOW	underscore.js	1277	function createPredicateIndexFinder(dir) {	CODE
LOW	underscore-umd.js	1380	function createPredicateIndexFinder(dir) {	CODE
LOW	underscore-esm-min.js	5	var VERSION="1.13.8",root="object"==typeof self&&self.self===self&&self\|\|"object"==typeof global&&global.global===global	CODE
LOW	underscore-esm.js	1371	function createPredicateIndexFinder(dir) {	CODE
LOW	modules/_createPredicateIndexFinder.js	5	export default function createPredicateIndexFinder(dir) {	CODE