AI Slop Code Risk Monitor

Turfjs/turf

Name: Turfjs/turf — TypeScript 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).

A modular geospatial engine written in JavaScript and TypeScript

0.2 Low pattern signal View on GitHub

Open-Source Code Quality, Security and Technical Debt Review

This report summarizes scanner evidence for Turfjs/turf, a TypeScript project with 10,525 GitHub stars. SynthScan examined 136,029 lines of code across 939 source files, recording 19 pattern matches distributed across 4 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

2026-10-26

Last Push

10.5K

Stars

TypeScript

Language

136.0K

Lines of Code

939

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 0.9/100 · LOW

Can maintainers explain intent, assumptions, and trade-offs? 19 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 0.4/100 · LOW

Are wrappers, guards, and repeated structures necessary? 12 finding(s).

PR Review Velocity Impact 0.8/100 · LOW

Which changes need focused human review? 19 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 2LOW 17

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 19 distinct pattern matches across 4 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.

Hyper-Verbose Identifiers12 hits · 12 pts

Severity	File	Line	Snippet	Context
LOW	packages/turf-mask/index.ts	95	function createGeomFromPolygonClippingOutput(unioned: Position[][][]) {	CODE
LOW	packages/turf-rhumb-destination/index.ts	83	function calculateRhumbDestination(	CODE
LOW	packages/turf-standard-deviational-ellipse/index.ts	70	function standardDeviationalEllipse(	CODE
LOW	packages/turf-boolean-crosses/index.ts	72	function doMultiPointAndLineStringCross(	CODE
LOW	packages/turf-boolean-crosses/index.ts	136	function doLineStringAndPolygonCross(lineString: LineString, polygon: Polygon) {	CODE
LOW	packages/turf-boolean-valid/index.ts	126	function checkRingsForSpikesPunctures(geom: Position[]) {	CODE
LOW	packages/turf-boolean-valid/index.ts	137	function checkPolygonAgainstOthers(	CODE
LOW	…ages/turf-line-intersect/lib/sweeplineIntersections.ts	64	function checkWhichSegmentHasRightEndpointFirst(seg1: Segment, seg2: Segment) {	CODE
LOW	packages/turf-boolean-contains/index.ts	143	function isMultiPointInMultiPolygon(	CODE
LOW	packages/turf-boolean-contains/index.ts	189	function isMultiLineStringInMultiPolygon(	CODE
LOW	packages/turf-boolean-contains/index.ts	231	function isMultiPolygonInMultiPolygon(	CODE
LOW	packages/turf-boolean-contains/index.ts	357	function splitLineIntoSegmentsOnPolygon(	CODE

AI Slop Vocabulary2 hits · 6 pts

Severity	File	Line	Snippet	Context
MEDIUM	packages/turf-point-to-line-distance/test.ts	127	// This point should be about 3.4m from the line. Definitely not 4.3!	COMMENT
MEDIUM	packages/turf-point-to-line-distance/test.ts	138	// This point should be about 1000m from the line. Definitely not 1017!	COMMENT

Over-Commented Block4 hits · 4 pts

Severity	File	Line	Snippet	Context
LOW	packages/turf-nearest-point-on-line/test.ts	621	// create a test case where the line segment passed is small enough such that	COMMENT
LOW	packages/turf-nearest-point-on-line/index.ts	241	// Convert spherical (lng, lat) to cartesian vector coords (x, y, z)	COMMENT
LOW	packages/turf-nearest-point-on-line/index.ts	281	}	COMMENT
LOW	packages/turf-meta/index.ts	641	// @ts-expect-error: Known type conflict	COMMENT

Verbosity Indicators1 hit · 2 pts

Severity	File	Line	Snippet	Context
LOW	packages/turf-shortest-path/lib/javascript-astar.ts	86	// We need to check if the path we have arrived at this neighbor is the shortest one we have seen yet.	COMMENT