AI Slop Code Risk Monitor

pgvector/pgvector

Name: pgvector/pgvector — C 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).

Open-source vector similarity search for Postgres

1.8 Low pattern signal View on GitHub

Open-Source Code Quality, Security and Technical Debt Review

This report summarizes scanner evidence for pgvector/pgvector, a C project with 23,542 GitHub stars. SynthScan examined 24,308 lines of code across 136 source files, recording 43 pattern matches distributed across 1 syntactic category. The legacy adjusted pattern signal is 1.8 (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.

1.8

Adjusted Signal

1.8

Raw Pattern Score

100%

Time Factor

2026-10-30

Last Push

23.5K

Stars

Language

24.3K

Lines of Code

136

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 8.5/100 · LOW

Can maintainers explain intent, assumptions, and trade-offs? 43 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 0.0/100 · LOW

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

PR Review Velocity Impact 8.5/100 · LOW

Which changes need focused human review? 43 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 43

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 43 distinct pattern matches across 1 syntactic category. 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 Block43 hits · 43 pts

Severity	File	Line	Snippet	Context
LOW	src/ivfbuild.c	1	#include "postgres.h"	COMMENT
LOW	src/ivfbuild.c	21	#include "miscadmin.h"	COMMENT
LOW	src/ivfscan.c	1	#include "postgres.h"	COMMENT
LOW	src/halfvec.c	1	#include "postgres.h"	COMMENT
LOW	src/halfvec.c	21		COMMENT
LOW	src/hnswutils.c	1	#include "postgres.h"	COMMENT
LOW	src/hnswutils.c	81	#else	COMMENT
LOW	src/hnswutils.c	101	return murmurhash64((uint64) offset);	COMMENT
LOW	src/hnswbuild.c	41	#include "access/genam.h"	COMMENT
LOW	src/hnswbuild.c	61	#include "utils/backend_status.h"	COMMENT
LOW	src/hnswvacuum.c	1	#include "postgres.h"	COMMENT
LOW	src/bitutils.c	1	#include "postgres.h"	COMMENT
LOW	src/bitutils.c	21	#define TARGET_AVX512_POPCOUNT	COMMENT
LOW	src/bitutils.c	161		COMMENT
LOW	src/ivfutils.c	1	#include "postgres.h"	COMMENT
LOW	src/vector.c	1	#include "postgres.h"	COMMENT
LOW	src/vector.c	21	#include "utils/lsyscache.h"	COMMENT
LOW	src/ivfflat.c	1	#include "postgres.h"	COMMENT
LOW	src/ivfinsert.c	1	#include "postgres.h"	COMMENT
LOW	src/halfutils.c	1	#include "postgres.h"	COMMENT
LOW	src/halfutils.c	241		COMMENT
LOW	src/hnsw.h	1	#ifndef HNSW_H	COMMENT
LOW	src/hnsw.h	21	#if PG_VERSION_NUM >= 190000	COMMENT
LOW	src/hnsw.h	41	#endif	COMMENT
LOW	src/hnsw.h	61	#define HNSW_UPDATE_LOCK 0	COMMENT
LOW	src/hnsw.h	81		COMMENT
LOW	src/sparsevec.h	1	#ifndef SPARSEVEC_H	COMMENT
LOW	src/halfvec.h	1	#ifndef HALFVEC_H	COMMENT
LOW	src/halfvec.h	21	#elif defined(__x86_64__) && defined(__clang_major__) && __clang_major__ >= 7	COMMENT
LOW	src/halfvec.h	41	#if defined(USE_DISPATCH)	COMMENT
LOW	src/hnswscan.c	1	#include "postgres.h"	COMMENT
LOW	src/ivfkmeans.c	1	#include "postgres.h"	COMMENT
LOW	src/ivfvacuum.c	1	#include "postgres.h"	COMMENT
LOW	src/hnswinsert.c	1	#include "postgres.h"	COMMENT
LOW	src/ivfflat.h	1	#ifndef IVFFLAT_H	COMMENT
LOW	src/ivfflat.h	21		COMMENT
LOW	src/ivfflat.h	41	#define IVFFLAT_TYPE_INFO_PROC 5	COMMENT
LOW	src/ivfflat.h	81	#define IvfflatBench(name, code) (code)	COMMENT
LOW	src/vector.h	1	#ifndef VECTOR_H	COMMENT
LOW	src/sparsevec.c	1	#include "postgres.h"	COMMENT
LOW	src/sparsevec.c	21	#if PG_VERSION_NUM >= 160000	COMMENT
LOW	src/hnsw.c	1	#include "postgres.h"	COMMENT
LOW	src/hnsw.c	21	#include "storage/lwlock.h"	COMMENT