Repository Analysis

xlite-dev/LeetCUDA

Modern CUDA Learn Notes with PyTorch for Beginners, 200+ CUDA Kernels, Tensor Cores, HGEMM, FA-2 MMA.

13.1 Low AI signal View on GitHub

Analysis Overview

This report presents the forensic synthetic code analysis of xlite-dev/LeetCUDA, a Cuda project with 11,843 GitHub stars. SynthScan v2.0 examined 16,740 lines of code across 111 source files, recording 89 pattern matches distributed across 13 syntactic categories. The overall adjusted score of 13.1 places this repository in the Low AI signal band.

The scanner applied 160+ deterministic lexical heuristics, multi-line block detectors, abstract syntax tree depth profilers, and a cross-file Jaccard similarity matrix to construct a statistically normalised synthetic code estimate. All matches are individually weighted by severity coefficient and contextual multiplier before summation, and the resulting headline score is temporally discounted to account for the repository's development history relative to the commercial emergence of large language model coding tooling (November 2022 onward).

13.1
Adjusted Score
13.1
Raw Score
100%
Time Factor
2026-08-27
Last Push
11.8K
Stars
Cuda
Language
16.7K
Lines of Code
111
Files
89
Pattern Hits
2026-08-29
Scan Date
0.03
HC Hit Rate

What These Metrics Mean

Adjusted Score
Primary synthetic code indicator. Raw score normalised per 1,000 lines of code and multiplied by the temporal discount factor. This is the definitive comparative metric — use it to rank repositories by AI authorship density.
Raw Score
The unmodified sum of all severity-weighted, context-multiplied pattern match scores before temporal discounting. Reflects the absolute signal strength independent of when the repository was last active.
Time Factor
The temporal discount multiplier (0–100%) applied to the raw score. Repositories last updated before ChatGPT's launch (Nov 2022) receive a 5% factor. Full signal is only assigned to repositories active in the post-adoption era (Jan 2024+).
Pattern Hits
Total count of individual pattern matches across all files and categories. A high hit count with a low score may indicate a very large codebase with isolated AI snippets; a low count with a high score indicates dense, concentrated AI signatures.
HC Hit Rate
High+Critical pattern hits per file, averaged across the repository. This orthogonal signal catches repositories where a few files are densely packed with high-severity AI tells — a strong indicator even when the normalised score appears moderate due to codebase size.
Lines of Code / Files
Total lines and files analysed. The scanner examines 94 file extensions. These denominators are used to normalise the score, enabling fair comparison between repositories of vastly different sizes.

Score History

This chart maps the temporal evolution of the adjusted synthetic code score across successive scan runs. An upward trajectory indicates ongoing incorporation of AI-generated code or expanding LLM-assisted scaffolding; a stable or declining trajectory may reflect active human refactoring, code removal, or the adoption of stricter authorship policies. The dashed secondary line (right axis) independently tracks total raw pattern hit count, which can diverge from the normalised score when codebase size changes significantly between scans.

Severity Breakdown

Classifies detected patterns by their diagnostic confidence and structural impact. CRITICAL patterns (coefficient 10) represent definitive synthetic signatures — hallucinated imports, explicit LLM attribution metadata — virtually never produced by human authors. HIGH (5) indicates strong structural tells such as cross-file repetition or cross-linguistic idioms. MEDIUM (2) covers recognisable conversational padding and AI-specific vocabulary. LOW (1) captures subtle indicators like tautological comments and generic boilerplate that require density to carry independent signal.

CRITICAL 0HIGH 3MEDIUM 39LOW 47

Directory Score Breakdown

This horizontal bar chart decomposes the repository's raw synthetic code score by top-level directory, allowing you to pinpoint precisely which modules or components carry the highest AI authorship density. Directories with disproportionately high scores relative to their size warrant targeted manual review: concentrated AI signatures often trace back to mass-generated configuration layers, auto-ported test suites, LLM-scaffolded boilerplate classes, or entire subsystems authored under heavy copilot assistance. Use this view to prioritise your human code-review effort.

Pattern Findings

The scanner identified 89 distinct pattern matches across 13 syntactic categories. Each entry below represents a discrete location in the source code where the engine recorded a statistically significant AI authorship indicator. 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 diagnostic confidence level (CRITICAL / HIGH / MEDIUM / LOW). The Context column identifies whether the match occurred inside executable code, an inline comment, or a string literal — comment-context matches receive a ×1.5 weight because LLMs systematically over-annotate. The ⚡ bolt icon marks clustered matches: three or more patterns within a 10-line window, each receiving an additional ×1.5 density multiplier as dense clusters constitute far stronger evidence of synthetic authorship than isolated hits.

Decorative Section Separators36 hits · 144 pts
SeverityFileLineSnippetContext
MEDIUMkernels/hgemm/tools/print_swizzle_layout.py48 # ----------------------------------------------------------------COMMENT
MEDIUMkernels/hgemm/tools/print_swizzle_layout.py55 # ----------------------------------------------------------------COMMENT
MEDIUMkernels/hgemm/tools/print_swizzle_layout.py56 # ----------------------------------------------------------------COMMENT
MEDIUMkernels/hgemm/tools/print_swizzle_layout.py60 # ----------------------------------------------------------------COMMENT
MEDIUMkernels/hgemm/tools/print_swizzle_layout.py69 # ----------------------------------------------------------------COMMENT
MEDIUMkernels/hgemm/tools/print_swizzle_layout.py78 # ----------------------------------------------------------------COMMENT
MEDIUMkernels/hgemm/tools/print_swizzle_layout.py87 # ----------------------------------------------------------------COMMENT
MEDIUMkernels/hgemm/tools/print_swizzle_layout.py96 # ----------------------------------------------------------------COMMENT
MEDIUMkernels/flash-attn/tools/print_swizzle_layout.py48 # ----------------------------------------------------------------COMMENT
MEDIUMkernels/flash-attn/tools/print_swizzle_layout.py55 # ----------------------------------------------------------------COMMENT
MEDIUMkernels/flash-attn/tools/print_swizzle_layout.py56 # ----------------------------------------------------------------COMMENT
MEDIUMkernels/flash-attn/tools/print_swizzle_layout.py60 # ----------------------------------------------------------------COMMENT
MEDIUMkernels/flash-attn/tools/print_swizzle_layout.py69 # ----------------------------------------------------------------COMMENT
MEDIUMkernels/flash-attn/tools/print_swizzle_layout.py78 # ----------------------------------------------------------------COMMENT
MEDIUMkernels/flash-attn/tools/print_swizzle_layout.py87 # ----------------------------------------------------------------COMMENT
MEDIUMkernels/flash-attn/tools/print_swizzle_layout.py96 # ----------------------------------------------------------------COMMENT
MEDIUMkernels/interview/build.sh19# ── ccache detection ──────────────────────────────────────────────COMMENT
MEDIUMkernels/interview/build.sh36# ── common flags (shared across all architectures) ────────────────COMMENT
MEDIUMkernels/interview/build.sh46# ── architecture configurations ───────────────────────────────────COMMENT
MEDIUMkernels/interview/build.sh84# ── CLI ───────────────────────────────────────────────────────────COMMENT
MEDIUMkernels/interview/build.sh119# ── clean ─────────────────────────────────────────────────────────COMMENT
MEDIUMkernels/interview/build.sh135# ── build one architecture ────────────────────────────────────────COMMENT
MEDIUMkernels/interview/build.sh175# ── main ──────────────────────────────────────────────────────────COMMENT
MEDIUMkernels/swizzle/print_swizzle_layout.py48 # ----------------------------------------------------------------COMMENT
MEDIUMkernels/swizzle/print_swizzle_layout.py55 # ----------------------------------------------------------------COMMENT
MEDIUMkernels/swizzle/print_swizzle_layout.py56 # ----------------------------------------------------------------COMMENT
MEDIUMkernels/swizzle/print_swizzle_layout.py60 # ----------------------------------------------------------------COMMENT
MEDIUMkernels/swizzle/print_swizzle_layout.py69 # ----------------------------------------------------------------COMMENT
MEDIUMkernels/swizzle/print_swizzle_layout.py78 # ----------------------------------------------------------------COMMENT
MEDIUMkernels/swizzle/print_swizzle_layout.py87 # ----------------------------------------------------------------COMMENT
MEDIUMkernels/swizzle/print_swizzle_layout.py96 # ----------------------------------------------------------------COMMENT
MEDIUMkernels/openai-triton/vector-add/triton_vector_add.py21# --------------COMMENT
MEDIUMkernels/cutlass/cute_dsl/sgemm/pipelining.py63 # ==========================================================================COMMENT
MEDIUMkernels/cutlass/cute_dsl/sgemm/pipelining.py65 # --------------------------------------------------------------------------COMMENT
MEDIUMkernels/cutlass/cute_dsl/sgemm/pipelining.py118 # ======================================================================COMMENT
MEDIUMkernels/cutlass/cute_dsl/sgemm/pipelining.py173 # ===================================================================COMMENT
Over-Commented Block18 hits · 18 pts
SeverityFileLineSnippetContext
LOWkernels/hgemm/bench/prof.py1import timeCOMMENT
LOWkernels/hgemm/bench/prof.py81 # run_benchmark(lib.hgemm_sliced_k_f16, a, b, "f16(sk)", c)COMMENT
LOWkernels/hgemm/tools/print_swizzle_layout.py41 rows: int = 16,COMMENT
LOWkernels/hgemm/tools/print_swizzle_layout.py61 # |bank |b 0~3 |b 4~7 |b 0~3 |b 4~7 |b 0~3 |b 4~7 |b 0~3 |b 4~7 |COMMENT
LOWkernels/hgemm/tools/print_swizzle_layout.py81 # |bank |b 8~11|b12~15|b 8~11|b12~15|b 8~11|b12~15|b 8~11|b12~15|COMMENT
LOWkernels/hgemm/tools/utils.py41 )COMMENT
LOWkernels/flash-attn/tools/print_swizzle_layout.py41 rows: int = 16,COMMENT
LOWkernels/flash-attn/tools/print_swizzle_layout.py61 # |bank |b 0~3 |b 4~7 |b 0~3 |b 4~7 |b 0~3 |b 4~7 |b 0~3 |b 4~7 |COMMENT
LOWkernels/flash-attn/tools/print_swizzle_layout.py81 # |bank |b 8~11|b12~15|b 8~11|b12~15|b 8~11|b12~15|b 8~11|b12~15|COMMENT
LOWkernels/flash-attn/utils/utils.h1#include <algorithm>COMMENT
LOWkernels/flash-attn/utils/utils.h21#define DEVICE_INLINE __device__ inlineCOMMENT
LOWkernels/interview/build.sh1#!/usr/bin/env bashCOMMENT
LOWkernels/swizzle/print_swizzle_layout.py41 rows: int = 16,COMMENT
LOWkernels/swizzle/print_swizzle_layout.py61 # |bank |b 0~3 |b 4~7 |b 0~3 |b 4~7 |b 0~3 |b 4~7 |b 0~3 |b 4~7 |COMMENT
LOWkernels/swizzle/print_swizzle_layout.py81 # |bank |b 8~11|b12~15|b 8~11|b12~15|b 8~11|b12~15|b 8~11|b12~15|COMMENT
LOWkernels/softmax/softmax.py61 out_val = [f"{v:<12}" for v in out_val]COMMENT
LOWkernels/openai-triton/vector-add/triton_vector_add.py41 # This program will process inputs that are offset from the initial data.COMMENT
LOWothers/tensorrt/fmha/fmha_pattern_match_ops.py41 V = V.permute(0, 2, 1, 3) # [B, S, N, h] -> [B, N, S, h]COMMENT
Cross-File Repetition3 hits · 15 pts
SeverityFileLineSnippetContext
HIGHkernels/hgemm/tools/print_swizzle_layout.py0---------------------------------------------------------------- [info] assert smem store layout col_stride <= 16, prefeSTRING
HIGHkernels/flash-attn/tools/print_swizzle_layout.py0---------------------------------------------------------------- [info] assert smem store layout col_stride <= 16, prefeSTRING
HIGHkernels/swizzle/print_swizzle_layout.py0---------------------------------------------------------------- [info] assert smem store layout col_stride <= 16, prefeSTRING
Deep Nesting8 hits · 8 pts
SeverityFileLineSnippetContext
LOWkernels/hgemm/hgemm.py362CODE
LOWkernels/hgemm/tools/print_swizzle_layout.py40CODE
LOWkernels/flash-attn/flash_attn_mma.py286CODE
LOWkernels/flash-attn/tools/print_swizzle_layout.py40CODE
LOWkernels/swizzle/print_swizzle_layout.py40CODE
LOWkernels/cutlass/cute_dsl/sgemm/pipelining.py17CODE
LOW…hers/pytorch/distributed/test_all_to_all_single_ray.py49CODE
LOWothers/pytorch/distributed/test_all_to_all_single.py16CODE
Hyper-Verbose Identifiers6 hits · 8 pts
SeverityFileLineSnippetContext
LOWkernels/hgemm/hgemm.py198def make_block_swizzle_stride(N: int, K: int, swizzle_factor: float = None):CODE
LOWkernels/hgemm/setup.py23def get_cuda_bare_metal_version(cuda_dir):CODE
LOWkernels/hgemm/tools/print_swizzle_layout.py40def print_smem_swizzle_layout(CODE
LOWkernels/flash-attn/tools/print_swizzle_layout.py40def print_smem_swizzle_layout(CODE
LOWkernels/swizzle/print_swizzle_layout.py40def print_smem_swizzle_layout(CODE
LOW…i-triton/merge-attn-states/triton_merge_attn_states.py119def merge_attn_states_kernel_opt(CODE
Excessive Try-Catch Wrapping5 hits · 6 pts
SeverityFileLineSnippetContext
LOWkernels/hgemm/tools/utils.py134 except Exception:CODE
LOW…hers/pytorch/distributed/test_all_to_all_single_ray.py116 except Exception as e:CODE
MEDIUM…hers/pytorch/distributed/test_all_to_all_single_ray.py49def run(self) -> torch.Tensor:CODE
LOWothers/pytorch/distributed/test_all_to_all_single.py85 except Exception as e:CODE
LOWothers/pytorch/distributed/test_dist_all.py180 except Exception as e:CODE
Self-Referential Comments2 hits · 6 pts
SeverityFileLineSnippetContext
MEDIUM…ls/openai-triton/fused-softmax/triton_fused_softmax.py144 # Create a number of persistent programs.COMMENT
MEDIUMkernels/openai-triton/vector-add/triton_vector_add.py47 # Create a mask to guard memory operations against out-of-bounds accesses.COMMENT
AI Structural Patterns3 hits · 3 pts
SeverityFileLineSnippetContext
LOWkernels/hgemm/hgemm.py212CODE
LOW…ls/openai-triton/fused-softmax/triton_fused_softmax.py29CODE
LOWothers/tensorrt/fmha/fmha_pattern_match_ops.py62CODE
Verbosity Indicators2 hits · 3 pts
SeverityFileLineSnippetContext
LOWkernels/interview/build.sh148 # Step 1: compile (ccache-cached when available)COMMENT
LOWkernels/interview/build.sh164 # Step 2: linkCOMMENT
Structural Annotation Overuse2 hits · 3 pts
SeverityFileLineSnippetContext
LOWkernels/interview/build.sh148 # Step 1: compile (ccache-cached when available)COMMENT
LOWkernels/interview/build.sh164 # Step 2: linkCOMMENT
Unused Imports2 hits · 2 pts
SeverityFileLineSnippetContext
LOWkernels/interview/bench_sdpa.py11CODE
LOWkernels/interview/bench_sdpa.py15CODE
Example Usage Blocks1 hit · 2 pts
SeverityFileLineSnippetContext
LOWkernels/interview/build.sh8# Usage:COMMENT
Slop Phrases1 hit · 2 pts
SeverityFileLineSnippetContext
LOWkernels/openai-triton/vector-add/triton_vector_add.py75 # - Don't forget to pass meta-parameters as keywords arguments.COMMENT