fastai/fastai

22.3

Adjusted Score

22.3

Raw Score

100%

Time Factor

2026-07-11

Last Push

28.1K

Stars

Jupyter Notebook

Language

20.0K

Lines of Code

114

Files

473

Pattern Hits

2026-07-14

Scan Date

0.00

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 0MEDIUM 5LOW 468

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 473 distinct pattern matches across 11 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.

Unused Imports344 hits · 310 pts

Severity	File	Line	Context
LOW	nbs/dltest.py	1	CODE
LOW	nbs/dltest.py	2	CODE
LOW	nbs/examples/distrib.py	1	CODE
LOW	nbs/examples/distrib.py	2	CODE
LOW	nbs/examples/distrib.py	3	CODE
LOW	nbs/examples/dataloader_spawn.py	4	CODE
LOW	nbs/examples/train_imdbclassifier.py	1	CODE
LOW	nbs/examples/train_imdbclassifier.py	2	CODE
LOW	nbs/examples/train_imdbclassifier.py	3	CODE
LOW	nbs/examples/train_imdbclassifier.py	5	CODE
LOW	nbs/examples/train_imdbclassifier.py	6	CODE
LOW	nbs/examples/train_imdbclassifier.py	7	CODE
LOW	nbs/examples/train_imagenette.py	1	CODE
LOW	nbs/examples/train_imagenette.py	2	CODE
LOW	nbs/examples/train_imagenette.py	3	CODE
LOW	nbs/examples/train_imagenette.py	4	CODE
LOW	nbs/examples/train_imagenette.py	6	CODE
LOW	nbs/examples/train_imagenette.py	7	CODE
LOW	nbs/examples/train_imagenette.py	8	CODE
LOW	nbs/examples/train_imagenette.py	9	CODE
LOW	nbs/examples/mnist_items.py	1	CODE
LOW	nbs/examples/mnist_blocks.py	1	CODE
LOW	nbs/examples/train_wt2.py	1	CODE
LOW	nbs/examples/train_wt2.py	2	CODE
LOW	nbs/examples/train_wt2.py	3	CODE
LOW	nbs/examples/train_wt2.py	4	CODE
LOW	nbs/examples/distrib_pytorch.py	1	CODE
LOW	nbs/examples/distrib_pytorch.py	2	CODE
LOW	nbs/examples/train_tabular.py	1	CODE
LOW	nbs/examples/train_tabular.py	2	CODE
LOW	nbs/examples/train_tabular.py	3	CODE
LOW	nbs/examples/train_tabular.py	4	CODE
LOW	nbs/examples/train_tabular.py	6	CODE
LOW	nbs/examples/train_tabular.py	7	CODE
LOW	nbs/examples/migrating_fastai.py	1	CODE
LOW	fastai/torch_imports.py	1	CODE
LOW	fastai/torch_imports.py	2	CODE
LOW	fastai/torch_imports.py	3	CODE
LOW	fastai/torch_imports.py	3	CODE
LOW	fastai/torch_imports.py	3	CODE
LOW	fastai/torch_imports.py	3	CODE
LOW	fastai/torch_imports.py	3	CODE
LOW	fastai/torch_imports.py	3	CODE
LOW	fastai/torch_imports.py	3	CODE
LOW	fastai/torch_imports.py	4	CODE
LOW	fastai/torch_imports.py	5	CODE
LOW	fastai/torch_imports.py	6	CODE
LOW	fastai/torch_imports.py	6	CODE
LOW	fastai/torch_imports.py	6	CODE
LOW	fastai/torch_imports.py	6	CODE
LOW	fastai/torch_imports.py	7	CODE
LOW	fastai/torch_imports.py	7	CODE
LOW	fastai/torch_imports.py	8	CODE
LOW	fastai/torch_imports.py	8	CODE
LOW	fastai/metrics.py	18	CODE
LOW	fastai/metrics.py	19	CODE
LOW	fastai/metrics.py	20	CODE
LOW	fastai/test_utils.py	12	CODE
LOW	fastai/test_utils.py	13	CODE
LOW	fastai/test_utils.py	14	CODE
284 more matches not shown…

Modern Structural Boilerplate55 hits · 55 pts

Severity	File	Line	Snippet	Context
LOW	fastai/metrics.py	8	__all__ = ['rmse', 'exp_rmspe', 'perplexity', 'AccumMetric', 'skm_to_fastai', 'optim_metric', 'accuracy', 'error_rate',	CODE
LOW	fastai/test_utils.py	8	__all__ = ['synth_dbunch', 'RegModel', 'synth_learner', 'VerboseCallback', 'get_env', 'try_import', 'nvidia_smi', 'nvidi	CODE
LOW	fastai/interpret.py	8	__all__ = ['plot_top_losses', 'Interpretation', 'ClassificationInterpretation', 'SegmentationInterpretation']	CODE
LOW	fastai/torch_core.py	8	__all__ = ['norm_types', 'setup_cuda', 'subplots', 'show_image', 'show_titled_image', 'show_images', 'ArrayBase',	CODE
LOW	fastai/_nbdev.py	3	__all__ = ["index", "modules", "custom_doc_links", "git_url"]	CODE
LOW	fastai/_pytorch_doc.py	6	__all__ = ['PYTORCH_URL', 'pytorch_doc_link']	CODE
LOW	fastai/distributed.py	8	__all__ = ['ParallelTrainer', 'setup_distrib', 'teardown_distrib', 'DistributedDL', 'DistributedTrainer', 'rank0_first']	CODE
LOW	fastai/collab.py	8	__all__ = ['TabularCollab', 'CollabDataLoaders', 'EmbeddingDotBias', 'EmbeddingNN', 'collab_learner']	CODE
LOW	fastai/optimizer.py	8	__all__ = ['pytorch_hp_map', 'Optimizer', 'sgd_step', 'weight_decay', 'l2_reg', 'average_grad', 'average_sqr_grad',	CODE
LOW	fastai/losses.py	8	__all__ = ['BaseLoss', 'CrossEntropyLossFlat', 'FocalLoss', 'FocalLossFlat', 'BCEWithLogitsLossFlat', 'BCELossFlat',	CODE
LOW	fastai/layers.py	8	__all__ = ['NormType', 'inplace_relu', 'Mish', 'Swish', 'module', 'Identity', 'Lambda', 'PartialLambda', 'Flatten',	CODE
LOW	fastai/learner.py	8	__all__ = ['replacing_yield', 'mk_metric', 'save_model', 'load_model', 'SkipToEpoch', 'Learner', 'before_batch_cb',	CODE
LOW	fastai/tabular/core.py	8	__all__ = ['make_date', 'add_datepart', 'add_elapsed_times', 'cont_cat_split', 'df_shrink_dtypes', 'df_shrink', 'Tabular	CODE
LOW	fastai/tabular/model.py	8	__all__ = ['emb_sz_rule', 'get_emb_sz', 'TabularModel', 'tabular_config']	CODE
LOW	fastai/tabular/data.py	8	__all__ = ['TabularDataLoaders']	CODE
LOW	fastai/tabular/learner.py	8	__all__ = ['TabularLearner', 'tabular_learner', 'show_results']	CODE
LOW	fastai/vision/gan.py	8	__all__ = ['GANModule', 'basic_critic', 'AddChannels', 'basic_generator', 'DenseResBlock', 'gan_critic', 'GANLoss',	CODE
LOW	fastai/vision/core.py	8	__all__ = ['imagenet_stats', 'cifar_stats', 'mnist_stats', 'OpenMask', 'TensorPointCreate', 'to_image', 'load_image',	CODE
LOW	fastai/vision/augment.py	8	__all__ = ['TensorTypes', 'RandTransform', 'FlipItem', 'DihedralItem', 'CropPad', 'RandomCrop', 'OldRandomCrop', 'Resize	CODE
LOW	fastai/vision/widgets.py	8	__all__ = ['widget', 'carousel', 'ImagesCleaner', 'ImageClassifierCleaner', 'HBox', 'VBox', 'widgets', 'Button', 'Checkb	CODE
LOW	fastai/vision/utils.py	8	__all__ = ['download_images', 'resize_to', 'verify_image', 'verify_images', 'resize_image', 'resize_images']	CODE
LOW	fastai/vision/data.py	8	__all__ = ['PointBlock', 'BBoxBlock', 'get_grid', 'clip_remove_empty', 'bb_pad', 'show_batch', 'ImageBlock', 'MaskBlock'	CODE
LOW	fastai/vision/learner.py	8	__all__ = ['model_meta', 'has_pool_type', 'cut_model', 'create_body', 'create_head', 'default_split', 'add_head',	CODE
LOW	fastai/vision/models/xresnet.py	8	__all__ = ['se_kwargs1', 'se_kwargs2', 'se_kwargs3', 'g0', 'g1', 'g2', 'g3', 'init_cnn', 'XResNet', 'xresnet18', 'xresne	CODE
LOW	fastai/vision/models/unet.py	8	__all__ = ['UnetBlock', 'ResizeToOrig', 'DynamicUnet']	CODE
LOW	fastai/medical/text.py	8	__all__ = []	CODE
LOW	fastai/medical/imaging.py	8	__all__ = ['dicom_windows', 'get_dicom_files', 'TensorDicom', 'PILDicom', 'array_freqhist_bins', 'TensorCTScan', 'PILCTS	CODE
LOW	fastai/text/core.py	8	__all__ = ['UNK', 'PAD', 'BOS', 'EOS', 'FLD', 'TK_REP', 'TK_WREP', 'TK_UP', 'TK_MAJ', 'WordTokenizer', 'fn_counter_pkl',	CODE
LOW	fastai/text/data.py	8	__all__ = ['pad_input', 'reverse_text', 'make_vocab', 'TensorText', 'LMTensorText', 'Numericalize', 'LMDataLoader', 'sho	CODE
LOW	fastai/text/learner.py	8	__all__ = ['match_embeds', 'load_ignore_keys', 'clean_raw_keys', 'load_model_text', 'TextLearner', 'decode_spec_tokens',	CODE
LOW	fastai/text/models/core.py	8	__all__ = ['LinearDecoder', 'SequentialRNN', 'get_language_model', 'SentenceEncoder', 'masked_concat_pool',	CODE
LOW	fastai/text/models/awdlstm.py	8	__all__ = ['awd_lstm_lm_config', 'awd_lstm_clas_config', 'dropout_mask', 'RNNDropout', 'WeightDropout', 'EmbeddingDropou	CODE
LOW	fastai/callback/comet.py	8	__all__ = ['CometCallback']	CODE
LOW	fastai/callback/mixup.py	8	__all__ = ['reduce_loss', 'MixHandler', 'MixUp', 'CutMix']	CODE
LOW	fastai/callback/wandb.py	8	__all__ = ['WandbCallback', 'log_dataset', 'log_model', 'wandb_process']	CODE
LOW	fastai/callback/fp16.py	8	__all__ = ['AMPMode', 'MixedPrecision', 'get_master', 'to_master_grads', 'to_model_params', 'test_overflow', 'grad_overf	CODE
LOW	fastai/callback/hook.py	8	__all__ = ['Hook', 'hook_output', 'Hooks', 'hook_outputs', 'dummy_eval', 'model_sizes', 'num_features_model', 'has_param	CODE
LOW	fastai/callback/core.py	8	__all__ = ['Callback', 'TrainEvalCallback', 'GatherPredsCallback', 'FetchPredsCallback', 'CancelStepException',	CODE
LOW	fastai/callback/captum.py	6	__all__ = ['CaptumInterpretation']	CODE
LOW	fastai/callback/preds.py	8	__all__ = ['MCDropoutCallback']	CODE
LOW	fastai/callback/azureml.py	3	__all__ = ['AzureMLCallback']	CODE
LOW	fastai/callback/tracker.py	8	__all__ = ['TerminateOnNaNCallback', 'TrackerCallback', 'EarlyStoppingCallback', 'SaveModelCallback', 'ReduceLROnPlateau	CODE
LOW	fastai/callback/channelslast.py	8	__all__ = ['ChannelsLast']	CODE
LOW	fastai/callback/schedule.py	8	__all__ = ['annealer', 'sched_lin', 'sched_cos', 'sched_no', 'sched_exp', 'SchedLin', 'SchedCos', 'SchedNo', 'SchedExp',	CODE
LOW	fastai/callback/progress.py	8	__all__ = ['ProgressCallback', 'ShowGraphCallback', 'CSVLogger']	CODE
LOW	fastai/callback/rnn.py	8	__all__ = ['ModelResetter', 'RNNCallback', 'RNNRegularizer', 'rnn_cbs']	CODE
LOW	fastai/callback/tensorboard.py	8	__all__ = ['TensorBoardBaseCallback', 'TensorBoardCallback', 'TensorBoardProjectorCallback', 'projector_word_embeddings'	CODE
LOW	fastai/callback/training.py	8	__all__ = ['bn_types', 'ShortEpochCallback', 'GradientAccumulation', 'GradientClip', 'set_bn_eval', 'BnFreeze']	CODE
LOW	fastai/callback/training.py	48	def set_bn_eval(m:nn.Module, use_eval=True)->None:	CODE
LOW	fastai/callback/data.py	8	__all__ = ['CollectDataCallback', 'WeightedDL', 'PartialDL']	CODE
LOW	fastai/data/transforms.py	8	__all__ = ['image_extensions', 'get_files', 'FileGetter', 'get_image_files', 'ImageGetter', 'get_text_files', 'ItemGette	CODE
LOW	fastai/data/core.py	8	__all__ = ['show_batch', 'get_show_batch_func', 'show_results', 'TfmdDL', 'DataLoaders', 'FilteredBase', 'TfmdLists', 'd	CODE
LOW	fastai/data/block.py	8	__all__ = ['TransformBlock', 'CategoryBlock', 'MultiCategoryBlock', 'RegressionBlock', 'DataBlock']	CODE
LOW	fastai/data/load.py	8	__all__ = ['fa_collate', 'fa_convert', 'SkipItemException', 'collate_error', 'DataLoader']	CODE
LOW	fastai/data/external.py	8	__all__ = ['fastai_cfg', 'fastai_path', 'URLs', 'untar_data']	CODE

AI Structural Patterns37 hits · 37 pts

Severity	File	Line	Context
LOW	nbs/examples/train_imagenette.py	39	CODE
LOW	fastai/layers.py	245	CODE
LOW	fastai/layers.py	469	CODE
LOW	fastai/learner.py	109	CODE
LOW	fastai/learner.py	291	CODE
LOW	fastai/tabular/core.py	150	CODE
LOW	fastai/tabular/model.py	40	CODE
LOW	fastai/vision/augment.py	1238	CODE
LOW	fastai/vision/augment.py	747	CODE
LOW	fastai/vision/augment.py	802	CODE
LOW	fastai/vision/augment.py	894	CODE
LOW	fastai/vision/utils.py	96	CODE
LOW	fastai/vision/data.py	114	CODE
LOW	fastai/vision/data.py	166	CODE
LOW	fastai/vision/data.py	221	CODE
LOW	fastai/vision/learner.py	91	CODE
LOW	fastai/vision/learner.py	155	CODE
LOW	fastai/vision/learner.py	166	CODE
LOW	fastai/vision/learner.py	191	CODE
LOW	fastai/vision/learner.py	220	CODE
LOW	fastai/vision/learner.py	266	CODE
LOW	fastai/vision/models/xresnet.py	30	CODE
LOW	fastai/vision/models/unet.py	59	CODE
LOW	fastai/medical/imaging.py	413	CODE
LOW	fastai/text/core.py	352	CODE
LOW	fastai/text/data.py	253	CODE
LOW	fastai/text/data.py	269	CODE
LOW	fastai/text/learner.py	257	CODE
LOW	fastai/text/models/core.py	147	CODE
LOW	fastai/callback/wandb.py	28	CODE
LOW	fastai/callback/core.py	118	CODE
LOW	fastai/callback/tracker.py	81	CODE
LOW	fastai/callback/schedule.py	114	CODE
LOW	fastai/data/transforms.py	30	CODE
LOW	fastai/data/core.py	309	CODE
LOW	fastai/data/core.py	344	CODE
LOW	fastai/data/load.py	94	CODE

Excessive Try-Catch Wrapping13 hits · 15 pts

Severity	File	Line	Snippet	Context
MEDIUM	fastai/fp16_utils.py	121	print("Error in prep_param_lists: model may contain a mixture of parameters "	CODE
LOW	fastai/vision/utils.py	37	except Exception as e: f"Couldn't download {url}."	CODE
LOW	fastai/medical/imaging.py	385	except Exception as e:	CODE
LOW	fastai/callback/wandb.py	70	except Exception as e:	CODE
LOW	fastai/callback/wandb.py	107	except Exception as e:	CODE
LOW	fastai/callback/wandb.py	130	except Exception as e:	CODE
MEDIUM	fastai/callback/wandb.py	124	def log_predictions(self):	CODE
LOW	fastai/callback/hook.py	100	except Exception as e:	CODE
LOW	fastai/callback/core.py	65	except Exception as e: raise modify_exception(e, f'Exception occured in `{self.__class__.__name__}` when cal	CODE
LOW	fastai/data/core.py	107	except Exception as e:	CODE
LOW	fastai/data/block.py	182	except Exception as e:	CODE
LOW	fastai/data/block.py	236	except Exception as e:	CODE
LOW	fastai/data/load.py	183	except Exception as e:	CODE

Deep Nesting9 hits · 9 pts

Severity	File	Line	Context
LOW	nbs/examples/train_imagenette.py	39	CODE
LOW	fastai/metrics.py	421	CODE
LOW	fastai/torch_core.py	531	CODE
LOW	fastai/fp16_utils.py	137	CODE
LOW	fastai/learner.py	451	CODE
LOW	fastai/text/learner.py	174	CODE
LOW	fastai/callback/wandb.py	53	CODE
LOW	fastai/data/load.py	71	CODE
LOW	fastai/data/load.py	158	CODE

Hyper-Verbose Identifiers6 hits · 6 pts

Severity	File	Line	Snippet	Context
LOW	fastai/interpret.py	164	def print_classification_report(self):	CODE
LOW	fastai/fp16_utils.py	137	def model_grads_to_master_grads(model_params, master_params, flat_master=False):	CODE
LOW	fastai/fp16_utils.py	159	def master_params_to_model_params(model_params, master_params, flat_master=False):	CODE
LOW	fastai/vision/utils.py	19	def _get_downloaded_image_filename(dest, name, suffix):	CODE
LOW	fastai/callback/tensorboard.py	101	def _write_projector_embedding(learn, writer, feat):	CODE
LOW	fastai/callback/tensorboard.py	137	def projector_word_embeddings(learn=None, layer=None, vocab=None, limit=-1, start=0, log_dir=None):	CODE

Redundant / Tautological Comments3 hits · 4 pts

Severity	File	Line	Snippet	Context
LOW	fastai/callback/wandb.py	55	# Check if wandb.init has been called	COMMENT
LOW	fastai/callback/wandb.py	230	# Check if wandb.init has been called in case datasets are logged manually	COMMENT
LOW	fastai/callback/fp16.py	211	# Check if it's been long enough without overflow	COMMENT

AI Slop Vocabulary2 hits · 4 pts

Severity	File	Line	Snippet	Context
MEDIUM	fastai/tabular/data.py	24	cat_names:list=None, # Column names pertaining to categorical variables	CODE
MEDIUM	fastai/tabular/data.py	25	cont_names:list=None, # Column names pertaining to continuous variables	CODE

Self-Referential Comments1 hit · 3 pts

Severity	File	Line	Snippet	Context
MEDIUM	fastai/interpret.py	132	# This function is mainly copied from the sklearn docs	COMMENT

Over-Commented Block2 hits · 2 pts

Severity	File	Line	Snippet	Context
LOW	fastai/vision/gan.py	241	# "Show a sample image."	COMMENT
LOW	fastai/callback/schedule.py	21	def __init__(self, f, start, end): store_attr('f,start,end')	COMMENT

Slop Phrases1 hit · 1 pts

Severity	File	Line	Snippet	Context
LOW	fastai/data/block.py	84	_msg = "If you wanted to compose several transforms in your getter don't forget to wrap them in a `Pipeline`."	CODE

Analysis Overview

What These Metrics Mean

Score History

Severity Breakdown

Directory Score Breakdown

Pattern Findings