3.2

Adjusted Signal

3.2

Raw Pattern Score

100%

Time Factor

2026-10-31

Last Push

3.9K

Stars

Language

49.1K

Lines of Code

195

Files

118

Pattern Hits

2026-10-31

Scan Date

0.01

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 14.6/100 · LOW

Can maintainers explain intent, assumptions, and trade-offs? 118 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 13.4/100 · LOW

Which changes need focused human review? 118 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 1MEDIUM 9LOW 108

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 118 distinct pattern matches across 9 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 Block87 hits · 87 pts

Severity	File	Line	Snippet	Context
LOW	NEWS.md	241	d = data.table(id1=rep(1:2, each=3L), id2=letters[c(4:3,5L,3:5)], v1=1:6)	COMMENT
LOW	NEWS.md	401	#5: 2025-09-14 5	COMMENT
LOW	NEWS.md	441	# user system elapsed	COMMENT
LOW	NEWS.md	641	# 3: a2 b1 c2 999 999 NaN 3	COMMENT
LOW	NEWS.md	1161	# Usage	COMMENT
LOW	NEWS.md	1241	# <int> <int> <int>	COMMENT
LOW	NEWS.md	1401		COMMENT
LOW	NEWS.md	1441	# was:	COMMENT
LOW	NEWS.md	1461		COMMENT
LOW	NEWS.md	1501		COMMENT
LOW	.ci/.lintr.R	21	message = "Use messagef to avoid fragmented translations.",	COMMENT
LOW	.ci/atime/tests.R	41	dt <- data.table(group = rep(1:2, l=N))	COMMENT
LOW	.ci/atime/tests.R	61	#	COMMENT
LOW	.ci/atime/tests.R	81	#	COMMENT
LOW	.ci/atime/tests.R	161	#define isFrame(x) isDataFrame(x)	COMMENT
LOW	.ci/linters/r/dt_lengths_linter.R	1	# This is lintr::lengths_linter(), but including 'vapply_1i()' which is more common internally in data.table	COMMENT
LOW	R/duplicated.R	41	f = attr(o, "starts", exact=TRUE)	COMMENT
LOW	R/duplicated.R	61	# H = 1:2e8,	COMMENT
LOW	R/test.data.table.R	161	# runtime test number (i.e. 'numStr') since we're just doing a static check here, though we _are_ careful to match	COMMENT
LOW	R/test.data.table.R	181	on=c(id='call_id')]	COMMENT
LOW	R/test.data.table.R	441	}	COMMENT
LOW	R/data.table.R	21		COMMENT
LOW	R/data.table.R	141	}	COMMENT
LOW	R/data.table.R	221	# (1) lapply(.SD, ...)	COMMENT
LOW	R/data.table.R	641	# exclude '..1' etc. for #5460	COMMENT
LOW	R/data.table.R	2281	if (length(expr)==3L && .arg_is_narm(expr))	COMMENT
LOW	R/data.table.R	2861	.Call(Cselfrefokwrapper,DT,verbose)	COMMENT
LOW	R/data.table.R	3521	## Additional restrictions are imposed if x is .SD, or if options indicate that no optimization	COMMENT
LOW	R/foverlaps.R	201		COMMENT
LOW	R/foverlaps.R	221	# distinguishable representative number*!!! In case of integers, the next integer after 5L is 6L. Simple. Increment is 1	COMMENT
LOW	R/foverlaps.R	241	# ---	COMMENT
LOW	R/cedta.R	1	cedta.pkgEvalsUserCode = c("gWidgetsWWW","statET","FastRWeb","slidify","rmarkdown","knitr","ezknitr","IRkernel", "rtvs")	COMMENT
LOW	.dev/revdep.R	1	# Run by package maintainer via aliases revdepsh and revdepr in .dev/.bash_aliases. See	COMMENT
LOW	.dev/revdep.R	81	require(utils) # only base is loaded when R_PROFILE_USER runs	COMMENT
LOW	.dev/cc.R	1	# data.table dev	COMMENT
LOW	.github/workflows/rchk.yaml	1	# adapted from a similar check run by {arrow}	COMMENT
LOW	src/forder.c	701	// several columns could squash into 1 byte. due to this bit squashing is why we deal	COMMENT
LOW	src/forder.c	921	// insert sort with some twists:	COMMENT
LOW	src/forder.c	1341	}	COMMENT
LOW	src/inrange.c	21	// while (i < n) {	COMMENT
LOW	src/fread.h	1	#ifndef dt_FREAD_H	COMMENT
LOW	src/fread.h	81	// Maximum number of rows to read, or INT64_MAX to read the entire dataset.	COMMENT
LOW	src/fread.h	101	// always at least 1).	COMMENT
LOW	src/fread.h	121	// Character that marks the beginning of a comment. When '\0', comment	COMMENT
LOW	src/fread.h	141		COMMENT
LOW	src/myomp.h	1		COMMENT
LOW	src/myomp.h	21	#define omp_get_num_threads() 1	COMMENT
LOW	src/dogroups.c	1	#include "data.table.h"	COMMENT
LOW	src/dogroups.c	21	// x y	COMMENT
LOW	src/dogroups.c	541	// user system elapsed	COMMENT
LOW	src/dogroups.c	561	// old code - no changes, R v3.1.0 --- BUT RESULTS ARE WRONG!	COMMENT
LOW	src/fwriteR.c	1	#include <stdbool.h>	COMMENT
LOW	src/ijoin.c	641	// k = from[i];	COMMENT
LOW	src/data.table.h	1	#include "myomp.h" // first for clang-13-omp, #5122	COMMENT
LOW	src/data.table.h	21	#endif	COMMENT
LOW	src/data.table.h	41	#define IS_UTF8(x) (getCharCE(x) == CE_UTF8)	COMMENT
LOW	src/data.table.h	61	# undef MAX	COMMENT
LOW	src/data.table.h	81	#define NEED2UTF8(s) !(IS_ASCII(s) \|\| (s)==NA_STRING \|\| IS_UTF8(s))	COMMENT
LOW	src/freadR.h	1	#ifndef dt_FREAD_R_H	COMMENT
LOW	src/fsort.c	281		COMMENT
27 more matches not shown…

AI Slop Vocabulary14 hits · 33 pts

Severity	File	Line	Snippet	Context
MEDIUM	.gitlab-ci.yml	103	## most comprehensive tests	COMMENT
MEDIUM	.ci/atime/tests.R	52	# See documentation in https://github.com/Rdatatable/data.table/wiki/Performance-testing for best practices.	COMMENT
MEDIUM	.ci/atime/tests.R	80	# A function to customize R package metadata and source files to facilitate version-specific installation and testing.	COMMENT
LOW	R/fread.R	219	# not worth doing a behavior test here, so just use getRversion().	COMMENT
LOW	R/duplicated.R	74	## unique.data.table has been refactored to simply call duplicated.data.table	COMMENT
LOW	R/wrappers.R	2	# Very small (e.g. one line) R functions that just call C.	COMMENT
LOW	R/data.table.R	2008	# TO DO: combine uniqlist and uniquelengths into one call. Or, just set len__ to NULL when dogroups infers that	COMMENT
MEDIUM	R/data.table.R	3434	# is robust to unnamed expr. Note that NA names are not possible here.	COMMENT
LOW	R/foverlaps.R	209	# Firstly, assuming 64-bit precision, we can't simply add 1L. For e.g., consider:	COMMENT
LOW	R/fcast.R	136	# just use the last column (as guess(data) would do) because length will be	COMMENT
MEDIUM	src/snprintf.c	36	// loop here with more robust checks as well to catch mistakes in fmt	COMMENT
MEDIUM	src/utils.c	25	// which needed a repeat of the argument. Hence simpler and more robust to return false when not type double.	COMMENT
MEDIUM	src/openmp-utils.c	69	// Keep this light, simple and robust. initDTthreads() ensures 1 <= DTthreads <= omp_get_num_proc()	COMMENT
MEDIUM	src/openmp-utils.c	140	// Allows robust testing of environment variables using Sys.setenv() to experiment.	COMMENT

Redundant / Tautological Comments5 hits · 8 pts

Severity	File	Line	Snippet	Context
LOW	R/fread.R	98	# Check if input is a connection and read it into memory	COMMENT
LOW	R/test.data.table.R	373	# Check if UTF-8 symbols can be represented in native encoding	COMMENT
LOW	R/test.data.table.R	393	# Check if y was explicitly provided (not just the default)	COMMENT
LOW	R/data.table.R	329	# Return result	COMMENT
LOW	.dev/cc.R	50	# Assign directly to better imitate actual namespace imports. Earlier tried to require(include.only=) these objects,	COMMENT

Verbosity Indicators3 hits · 7 pts

Severity	File	Line	Snippet	Context
LOW⚡	R/data.table.R	508	# Step 1: Apply lapply(.SD) optimization	COMMENT
LOW⚡	R/data.table.R	513	# Step 2: Apply GForce optimization	COMMENT
LOW⚡	R/data.table.R	518	# Step 3: Apply old mean optimization (fallback when GForce is not used)	COMMENT

Structural Annotation Overuse3 hits · 7 pts

Severity	File	Line	Snippet	Context
LOW⚡	R/data.table.R	508	# Step 1: Apply lapply(.SD) optimization	COMMENT
LOW⚡	R/data.table.R	513	# Step 2: Apply GForce optimization	COMMENT
LOW⚡	R/data.table.R	518	# Step 3: Apply old mean optimization (fallback when GForce is not used)	COMMENT

Synthetic Comment Markers1 hit · 5 pts

Severity	File	Line	Snippet	Context
HIGH	NEWS.1.md	1540	1. It seems OpenMP is not available on CRAN's Mac platform; NOTEs appeared in [CRAN checks](https://cran.r-project.org/w	CODE

TODO Padding3 hits · 4 pts

Severity	File	Line	Snippet	Context
LOW	R/data.table.R	941	# TODO: implement better version of "any"/"all"/"which" to avoid	COMMENT
LOW	R/setkey.R	219	# TODO: implement integer and character in Cfsort and remove this branch and warning	COMMENT
LOW	src/ijoin.c	8	// TODO: implement 'lookup' for 'gaps' and 'overlaps' arguments	COMMENT

Self-Referential Comments1 hit · 3 pts

Severity	File	Line	Snippet	Context
MEDIUM	R/IDateTime.R	257	# This method is just for ggplot2, #1713	COMMENT

Example Usage Blocks1 hit · 2 pts

Severity	File	Line	Snippet	Context
LOW	R/test.data.table.R	443	# Usage:	COMMENT

Rdatatable/data.table

Open-Source Code Quality, Security and Technical Debt Review