0.6

Adjusted Signal

0.6

Raw Pattern Score

100%

Time Factor

2026-10-31

Last Push

22.3K

Stars

Rust

Language

1.6M

Lines of Code

15.1K

Files

815

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 2.5/100 · LOW

Can maintainers explain intent, assumptions, and trade-offs? 791 finding(s).

Hallucinated Dependency & Supply Chain Risk 0.1/100 · LOW

Are imports declared and package/API names verified? 10 finding(s).

Agent Over-Engineering Ratio 1.0/100 · LOW

Are wrappers, guards, and repeated structures necessary? 273 finding(s).

PR Review Velocity Impact 2.7/100 · LOW

Which changes need focused human review? 815 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 1HIGH 9MEDIUM 13LOW 792

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 815 distinct pattern matches across 18 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 Block505 hits · 504 pts

Severity	File	Line	Snippet	Context
LOW	runtests.sh	1	#!/bin/bash	COMMENT
LOW	evals/run_swebench.py	261	remaining = deadline - time.monotonic()	COMMENT
LOW	evals/graders/no_any.sh	1	#!/bin/bash	COMMENT
LOW	evals/graders/flow_check.sh	1	#!/bin/bash	COMMENT
LOW	evals/graders/no_tsc.sh	1	#!/bin/bash	COMMENT
LOW	evals/graders/file_modified.sh	1	#!/bin/bash	COMMENT
LOW	evals/graders/no_commonjs.sh	1	#!/bin/bash	COMMENT
LOW	evals/graders/ast_query.sh	1	#!/bin/bash	COMMENT
LOW	evals/graders/no_flowfixme.sh	1	#!/bin/bash	COMMENT
LOW	evals/graders/file_contains.sh	1	#!/bin/bash	COMMENT
LOW	evals/graders/contains_ast_node_type.sh	1	#!/bin/bash	COMMENT
LOW	evals/graders/no_extra_flow_errors.sh	1	#!/bin/bash	COMMENT
LOW	evals/graders/no_extra_flow_errors.sh	21	# `./flow check . \| head` reports success even when Flow found errors.	COMMENT
LOW	evals/graders/file_not_modified.sh	1	#!/bin/bash	COMMENT
LOW	tslib/lib.es2018.full.d.ts	21	/// <reference lib="dom" />	COMMENT
LOW	tslib/lib.es2016.d.ts	21	/// <reference lib="es2016.array.include" />	COMMENT
LOW	tslib/lib.es2020.d.ts	21	/// <reference lib="es2020.bigint" />	COMMENT
LOW	tslib/lib.es2020.full.d.ts	21	/// <reference lib="dom" />	COMMENT
LOW	tslib/lib.es2021.d.ts	21	/// <reference lib="es2021.promise" />	COMMENT
LOW	tslib/lib.es2017.d.ts	21	/// <reference lib="es2017.arraybuffer" />	COMMENT
LOW	tslib/lib.es2019.full.d.ts	21	/// <reference lib="dom" />	COMMENT
LOW	tslib/lib.es2021.full.d.ts	21	/// <reference lib="dom" />	COMMENT
LOW	tslib/lib.es6.d.ts	21	/// <reference lib="dom" />	COMMENT
LOW	tslib/lib.esnext.d.ts	21	/// <reference lib="esnext.intl" />	COMMENT
LOW	tslib/lib.es2024.d.ts	21	/// <reference lib="es2024.arraybuffer" />	COMMENT
LOW	tslib/lib.es2022.full.d.ts	21	/// <reference lib="dom" />	COMMENT
LOW	tslib/lib.es2017.full.d.ts	21	/// <reference lib="dom" />	COMMENT
LOW	tslib/lib.es2024.full.d.ts	21	/// <reference lib="dom" />	COMMENT
LOW	tslib/lib.d.ts	21	/// <reference lib="dom" />	COMMENT
LOW	tslib/lib.es2018.d.ts	21	/// <reference lib="es2018.asynciterable" />	COMMENT
LOW	tslib/lib.esnext.full.d.ts	21	/// <reference lib="dom" />	COMMENT
LOW	tslib/lib.es2023.full.d.ts	21	/// <reference lib="dom" />	COMMENT
LOW	tslib/lib.es2022.d.ts	21	/// <reference lib="es2022.array" />	COMMENT
LOW	tslib/lib.es2016.full.d.ts	21	/// <reference lib="dom" />	COMMENT
LOW	tslib/lib.es2023.d.ts	21	/// <reference lib="es2023.array" />	COMMENT
LOW	tslib/lib.es2019.d.ts	21	/// <reference lib="es2019.array" />	COMMENT
LOW	tslib/lib.es2015.d.ts	21	/// <reference lib="es2015.core" />	COMMENT
LOW	tests/fs.sh	1	#!/bin/bash	COMMENT
LOW	tests/type_at_pos_types/recursive.js	41	// The following exhibits a use of the RemoveTopLevelTvarVisitor	COMMENT
LOW	tests/suppress_unused_lazy_3/test.sh	1	#!/bin/bash	COMMENT
LOW	tests/recheck_commit_deadlock/test.sh	1	#!/bin/bash	COMMENT
LOW	tests/import_typeof/import_typeof.js	81	(() => {}) as functionFoo4T; // Error: return types are not compatible	COMMENT
LOW	tests/rust_port_flowset_clear/test.js	1	// Regression test for FlowSet::clear() destroying speculation levels.	COMMENT
LOW	tests/jsx_pragma/invalid_jsx_unsupported.js	1	// @jsx (x)=>x	COMMENT
LOW	tests/jsx_pragma/invalid_no_expr.js	1	// @jsx	COMMENT
LOW	tests/lint_severity_vim/test.sh	1	#!/bin/bash	COMMENT
LOW	tests/hook_syntax_compatibility/rules_of_hooks.js	1041	/* [classError('use')] */	COMMENT
LOW	tests/hook_syntax_compatibility/rules_of_hooks.js	1061	// },	COMMENT
LOW	tests/type_spread/inline.js	21	// Ensuring we still error in these cases when the RHS is a spread	COMMENT
LOW	tests/type_at_pos_statement/test.sh	1	#!/bin/bash	COMMENT
LOW	tests/type_at_pos_match_pattern/test.sh	1	#!/bin/bash	COMMENT
LOW	tests/lint_flag_redundant/test.sh	1	#!/bin/bash	COMMENT
LOW	…sts/saved_state_reinit_libdef_change_mergebase/test.sh	1	#!/bin/bash	COMMENT
LOW	tests/suppress_unused_lazy_2/test.sh	1	#!/bin/bash	COMMENT
LOW	tests/recheck_cancel_optional_chain/test.sh	1	#!/bin/bash	COMMENT
LOW	tests/recheck_cancel_optional_chain/test.sh	21	# Generate a file whose check spends many seconds inside a SINGLE optional-chain	COMMENT
LOW	tests/spread_performance/type_spread.js	1	//@flow	COMMENT
LOW	tests/type_at_pos_template_literal/test.sh	1	#!/bin/bash	COMMENT
LOW	tests/cli_renderer_not_all/test.sh	1	#!/bin/bash	COMMENT
LOW	tests/type_at_pos_namespace/test.sh	1	#!/bin/bash	COMMENT
445 more matches not shown…

Hyper-Verbose Identifiers259 hits · 287 pts

Severity	File	Line	Snippet	Context
LOW	evals/run_swebench.py	226	def _registered_process_group(proc):	CODE
LOW	evals/compile_swebench.py	407	def compile_project_pattern_evals(project_dir, flow_version):	CODE
LOW	…01_error_fixing/error_008_indexer_access/input/main.js	18	function getOrDefault(dict: Map<string, number>, key: string, defaultVal: number): number {	CODE
LOW	…01_error_fixing/error_008_indexer_access/ideal/main.js	21	function getOrDefault(dict: Map<string, number>, key: string, defaultVal: number): number {	CODE
LOW	website/docusaurus.config.js	39	function polyfillNodeBuiltinsForFlowJS(context, options) {	CODE
LOW	website/docusaurus.config.js	66	function enableSomeEnvVarsAsBuildTimeConstants() {	CODE
LOW	website/libs/lz-string.js	11	declare export function decompressFromEncodedURIComponent(s: string): string;	CODE
LOW	website/libs/lz-string.js	12	declare export function compressToEncodedURIComponent(s: string): string;	CODE
LOW	website/src/try-flow/TryFlow.js	94	function getRecoverableStateFromStorage(): ?InitialStateFromHash {	CODE
LOW	website/src/try-flow/flow-loader.js	251	function normalizeFlowReleaseVersion(version: string): string {	CODE
LOW	website/src/try-flow/tokens-theme-provider.js	52	function generateTokensCSSForColorMap(colorMap) {	CODE
LOW	website/src/theme/Navbar/MobileSidebar/Header/index.js	38	export default function NavbarMobileSidebarHeader(): React.Node {	CODE
LOW⚡	tests/hook_syntax_compatibility/syntax_compatibility.js	5	export function useHooklikeAnnotatedFunction(): void { }	CODE
LOW⚡	tests/hook_syntax_compatibility/syntax_compatibility.js	7	function useHooklikeInferredFunction() { return 42; }	CODE
LOW⚡	tests/hook_syntax_compatibility/syntax_compatibility.js	9	declare export function useDeclaredHooklikeFunction(): number;	CODE
LOW⚡	tests/hook_syntax_compatibility/rules_of_hooks.js	51	function normalFunctionWithNormalFunction() {	CODE
LOW⚡	tests/hook_syntax_compatibility/rules_of_hooks.js	56	function normalFunctionWithConditionalFunction() {	CODE
LOW⚡	tests/hook_syntax_compatibility/rules_of_hooks.js	64	function functionThatStartsWithUseButIsntAHook() {	CODE
LOW	tests/hook_syntax_compatibility/rules_of_hooks.js	746	function normalFunctionWithConditionalHook() {	CODE
LOW	tests/assertion_functions_lib/test.js	29	function refinesDiscriminantAgainstLocalConst(): boolean {	CODE
LOW	tests/assertion_functions_lib/test.js	37	function refinesDiscriminantAgainstImportedConst(): boolean {	CODE
LOW	tests/assertion_functions_lib/test.js	108	function reproSequentialMemberNull(field: {a: ?string, b: ?string, c: ?string}): string {	CODE
LOW	tests/invariant/arg_order.js	4	function laterArgReassignsRefinedBinding(y: unknown, z: number): void {	CODE
LOW⚡	tests/invariant/arg_order.js	16	function laterArgReadUsesRefinedEnv(x: unknown): void {	CODE
LOW⚡	tests/invariant/arg_order.js	26	function laterArgWritesValueReadEarlier(value: ?number): void {	CODE
LOW⚡	tests/invariant/arg_order.js	33	function laterArgAssignsValueReadEarlier(): void {	CODE
LOW	tests/refinements/computed_string_literal.js	29	function testSwitchLiteralProperty(b: B) {	CODE
LOW	tests/refinements/typeof.js	59	function testInvalidTemplateLiteral(x: string \| number) {	CODE
LOW	tests/refinements/typeof.js	101	function testAnyWithNumberPostConditional(x: any) {	CODE
LOW	tests/refinements/typeof.js	132	function testPolyClassCtorWithFunction() {	CODE
LOW⚡	tests/assertion_functions_jest/test.js	21	function reproNeverReturnsInReturn(): empty {	CODE
LOW⚡	tests/assertion_functions_jest/test.js	27	function reproNeverReturnsInReturnWithMessage(): string {	CODE
LOW⚡	tests/assertion_functions_jest/test.js	33	function reproNeverReturnsInNestedTernary(level: string): string {	CODE
LOW⚡	tests/assertion_functions_jest/test.js	39	function sequenceExpressionAsserts(value: ?number): number {	CODE
LOW	tests/assertion_functions_jest/test.js	51	function expressionPositionHavocsRefinements(object: {property: ?string}) {	CODE
LOW	tests/assertion_functions/consistency.js	56	function switchWithThrowingDefault(value: 'a' \| 'b' \| 'c'): asserts value is 'a' \| 'b' {	CODE
LOW	tests/assertion_functions/local.js	64	function inferredAliasesAreAssertions(	CODE
LOW⚡	tests/assertion_functions/local.js	93	function bareFalseStillChecksArgumentTypes(): void {	CODE
LOW⚡	tests/assertion_functions/local.js	97	function bareFalseStillChecksArity(): void {	CODE
LOW⚡	tests/assertion_functions/local.js	101	function bareMissingArgumentIsReachable(): number {	CODE
LOW⚡	tests/assertion_functions/local.js	106	function bareDefaultedMissingArgumentIsReachable(): number {	CODE
LOW⚡	tests/assertion_functions/local.js	111	function bareDefaultedMissingArgumentDoesNotEndSequence(): void {	CODE
LOW	tests/assertion_functions/local.js	128	function bareFalseClosesBranchInLoop(values: Array<?string>): void {	CODE
LOW	tests/assertion_functions/local.js	143	function expressionPositionDoesNotAssert(value: unknown) {	CODE
LOW	tests/assertion_functions/local.js	191	function unannotatedBodyLocalSilent(value: unknown) {	CODE
LOW	tests/assertion_functions/local.js	206	function assertionInLoopPreservesPreLoopNarrowing(input: unknown, c: boolean) {	CODE
LOW	tests/assertion_functions/local.js	290	function unannotatedParameterSilent(cb, value: unknown) { // error: missing annotation on cb	CODE
LOW	tests/assertion_functions/local.js	319	function bareFalseWithTargsIsAbrupt(): number {	CODE
LOW⚡	tests/assertion_functions/imports.js	84	function importedAgreedUnionSilent(value: unknown) {	CODE
LOW⚡	tests/assertion_functions/imports.js	90	function importedGenericApplication(value: unknown) {	CODE
LOW⚡	tests/assertion_functions/imports.js	96	function inferredExportsAreAssertions(	CODE
LOW	tests/assertion_functions/arg_order.js	10	function laterArgReassignsAssertedBinding(x: unknown, y: number) {	CODE
LOW	tests/assertion_functions/arg_order.js	27	function laterArgHavocsAssertedBinding(): void {	CODE
LOW⚡	tests/assertion_functions/arg_order.js	39	function earlierArgWriteStillRefines(x: unknown, w: unknown) {	CODE
LOW⚡	tests/assertion_functions/arg_order.js	45	function laterArgReadUsesUnrefinedEnv(x: unknown) {	CODE
LOW⚡	tests/assertion_functions/arg_order.js	53	function laterArgMemberReadUsesUnrefinedEnv(x: {name: unknown}) {	CODE
LOW⚡	tests/assertion_functions/arg_order.js	58	function laterArgReadUsesUnrefinedEnvBare(x: string \| null) {	CODE
LOW⚡	tests/assertion_functions/arg_order.js	63	function laterArgWritesOtherBindingFromAsserted(y: unknown, x: unknown) {	CODE
LOW⚡	tests/assertion_functions/arg_order.js	73	function laterMessageReadsNullableValue(value: ?{name: string}): string {	CODE
LOW	tests/assertion_functions/arg_order.js	87	function laterMessageReadsUnrefinedDiscriminatedUnion(prop: JSXProp): boolean {	CODE
199 more matches not shown…

Empty Error Handlers5 hits · 25 pts

Severity	File	Line	Snippet	Context
HIGH	evals/run_swebench.py	208	except subprocess.TimeoutExpired:	CODE
HIGH	evals/run_swebench.py	433	except Exception:	CODE
HIGH	evals/run_swebench.py	257	except subprocess.TimeoutExpired:	CODE
HIGH	evals/run_swebench.py	304	except (ProcessLookupError, PermissionError):	CODE
HIGH	evals/test_dry_run.py	49	except Exception:	CODE

Cross-Language Confusion (JS/TS)3 hits · 15 pts

Severity	File	Line	Snippet	Context
HIGH	tests/union_new/issue-1462-i.js	21	print(val.foo); // <--- foo could be an array	CODE
HIGH	tests/union_new/issue-1462-ii.js	23	print(val.foo);	CODE
HIGH	packages/flow-transform/src/transform/print.js	79	print(	CODE

AI Slop Vocabulary4 hits · 12 pts

Severity	File	Line	Snippet	Context
MEDIUM	…_port/crates/flow_typing_flow_common/src/flow_cache.rs	63	// corresponding typing rules are already sufficiently robust.	COMMENT
MEDIUM	…/crates/flow_env_builder_resolver/src/name_resolver.rs	3710	// possibly undefined variable. Essentially, we are treating var redeclaration as a	COMMENT
MEDIUM	packages/flow-parser/__tests__/runContractTests.sh	39	# same `$WASM_OUT` (the JS test harness `require()`s a hard-coded	COMMENT
MEDIUM	newtests/lsp/diagnostics/test.js	29	// To be robust against races: we'll wait up to 9s to get the	COMMENT

Excessive Try-Catch Wrapping7 hits · 10 pts

Severity	File	Line	Snippet	Context
LOW	evals/run_swebench.py	433	except Exception:	CODE
MEDIUM	evals/run_swebench.py	756	print(f"Error: Flow binary not found at {args.flow_bin}", file=sys.stderr)	CODE
LOW	evals/run_swebench.py	852	except Exception as e:	CODE
MEDIUM	evals/run_swebench.py	87	def _register_proc(proc):	CODE
LOW	evals/test_dry_run.py	49	except Exception:	CODE
LOW	evals/test_dry_run.py	85	except Exception as exc:	CODE
MEDIUM	evals/compile_swebench.py	624	print(f"Error: {evals_dir} is not a directory", file=sys.stderr)	CODE

Hallucination Indicators1 hit · 10 pts

Severity	File	Line	Snippet	Context
CRITICAL	rust_port/crates/flow_env_builder/src/name_def.rs	1688	Def::TypeParam(data) => DefinitionReferenceKind::Name(data.tparam.1.name.name.dupe()),	CODE

Self-Referential Comments3 hits · 9 pts

Severity	File	Line	Snippet	Context
MEDIUM	evals/run_swebench.py	176	# Create a wrapper script so `./flow` works in the temp dir	COMMENT
MEDIUM	tests/assertion_call_analysis_saved_state/test.sh	7	# Create a saved state without test.js, then restore the file without reporting	COMMENT
MEDIUM	packages/scripts/build.sh	81	# Create a new file with .js.flow extension	COMMENT

AI Response Leakage1 hit · 8 pts

Severity	File	Line	Snippet	Context
HIGH	website/blog/2015-02-18-Import-Types.md	67	### Wait, but what happens at runtime after I've added an `import type` declaration?	COMMENT

Deep Nesting7 hits · 7 pts

Severity	File	Line	Context
LOW	evals/run_swebench.py	322	CODE
LOW	evals/run_swebench.py	482	CODE
LOW	evals/run_swebench.py	649	CODE
LOW	evals/run_swebench.py	814	CODE
LOW	evals/compile_swebench.py	98	CODE
LOW	evals/compile_swebench.py	152	CODE
LOW	evals/compile_swebench.py	407	CODE

Decorative Section Separators2 hits · 6 pts

Severity	File	Line	Snippet	Context
MEDIUM	evals/compile_swebench.py	36	# ---------------------------------------------------------------------------	COMMENT
MEDIUM	evals/compile_swebench.py	48	# ---------------------------------------------------------------------------	COMMENT

Fake / Example Data6 hits · 6 pts

Severity	File	Line	Snippet	Context
LOW	…01_error_fixing/error_005_array_variance/input/main.js	40	addPlaceholder(videos, {id: 'placeholder', url: '/placeholder.png'});	CODE
LOW	…01_error_fixing/error_005_array_variance/ideal/main.js	41	addPlaceholder(videos, {id: 'placeholder', url: '/placeholder.png'});	CODE
LOW	tests/custom_errors/imported.js	21	const emailTest1: Email = "user@example.com"; // OK	CODE
LOW	tests/custom_errors/imported.js	164	email: "user@example.com",	CODE
LOW	rust_port/crates/flow_common_ty/src/ty_printer.rs	529	AnyKind::Placeholder => "placeholder",	CODE
LOW	rust_port/crates/flow_type_sig/src/type_sig_parse.rs	3543	def: tbls.lazy(Box::new(\|_, _, _\| unreachable!("placeholder"))),	CODE

Verbosity Indicators3 hits · 4 pts

Severity	File	Line	Snippet	Context
LOW	rust_port/crates/flow_parser_wasm/src/position.rs	76	// Step 1: Build line-start byte offset table and parallel UTF-16 offset table.	COMMENT
LOW	rust_port/crates/flow_parser_wasm/src/position.rs	137	// Step 2: Compute byte_offset for each position and sort.	COMMENT
LOW	rust_port/crates/flow_parser_wasm/src/position.rs	162	// Step 3: Single-pass through source text computing UTF-16 offsets.	COMMENT

Structural Annotation Overuse3 hits · 4 pts

Severity	File	Line	Snippet	Context
LOW	rust_port/crates/flow_parser_wasm/src/position.rs	76	// Step 1: Build line-start byte offset table and parallel UTF-16 offset table.	COMMENT
LOW	rust_port/crates/flow_parser_wasm/src/position.rs	137	// Step 2: Compute byte_offset for each position and sort.	COMMENT
LOW	rust_port/crates/flow_parser_wasm/src/position.rs	162	// Step 3: Single-pass through source text computing UTF-16 offsets.	COMMENT

Slop Phrases2 hits · 4 pts

Severity	File	Line	Snippet	Context
LOW	…t_port/crates/flow_parser_utils/src/flow_ast_differ.rs	2534	// We keep this so that we don't forget to create handlers above when we add new AST nodes.	COMMENT
MEDIUM	newtests/tool_test_example/test.js	31	// And here is how you can assert that a step introduces new flow errors. I	COMMENT

Overly Generic Function Names2 hits · 2 pts

Severity	File	Line	Snippet	Context
LOW	tests/hook_syntax_compatibility/rules_of_hooks.js	12	declare function doSomething(): void	CODE
LOW	tests/hook_syntax/rules_of_hooks.js	12	declare function doSomething(): void	CODE

Redundant / Tautological Comments1 hit · 2 pts

Severity	File	Line	Snippet	Context
LOW	packages/scripts/build.sh	79	# Check if file contains flow annotation	COMMENT

Example Usage Blocks1 hit · 2 pts

Severity	File	Line	Snippet	Context
LOW	packages/scripts/runOxidizedJestTests.sh	11	# Usage:	COMMENT

facebook/flow

Open-Source Code Quality, Security and Technical Debt Review