fish-shell/fish-shell

2.9

Adjusted Score

2.9

Raw Score

100%

Time Factor

2026-07-14

Last Push

33.8K

Stars

Rust

Language

118.6K

Lines of Code

356

Files

215

Pattern Hits

2026-07-14

Scan Date

0.05

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 17MEDIUM 20LOW 178

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 215 distinct pattern matches across 14 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.

Over-Commented Block122 hits · 122 pts

Severity	File	Line	Snippet	Context
LOW	crates/gettext-mo-file-parser/src/lib.rs	21	}	COMMENT
LOW	crates/gettext-extraction/src/lib.rs	81	/// the message ID is written into a new file in this directory,	COMMENT
LOW	crates/wgetopt/src/lib.rs	41	/// regardless of [Ordering].	COMMENT
LOW	crates/wgetopt/src/lib.rs	61	/// Indicates whether an option takes an argument, and whether that argument	COMMENT
LOW	crates/wgetopt/src/lib.rs	121	shortopts: &'opts wstr,	COMMENT
LOW	crates/util/src/lib.rs	21	/// file12.txt	COMMENT
LOW	crates/color/src/lib.rs	141	} else {	COMMENT
LOW	crates/fluent/src/lib.rs	181	}	COMMENT
LOW	crates/fluent/src/lib.rs	201	///	COMMENT
LOW	crates/fluent/src/lib.rs	221	$(	COMMENT
LOW	crates/printf/src/lib.rs	21	/// let s = sprintf!("%0.5g", 123456.0);	COMMENT
LOW	crates/printf/src/lib.rs	61	};	COMMENT
LOW	crates/printf/src/lib.rs	81	/// let mut output = String::new();	COMMENT
LOW	crates/printf/src/printf_impl.rs	321	/// Formats a string using the provided format specifiers, arguments, and locale,	COMMENT
LOW	crates/printf/src/locale.rs	1	/// The numeric locale. Note this is a pure value type.	COMMENT
LOW	crates/printf/src/fmt_fp/decimal.rs	241	// which is given by remainder (that is, remainder = self[digit_idx] % mod_base).	COMMENT
LOW	crates/printf/src/fmt_fp/mod.rs	101		COMMENT
LOW	crates/common/src/lib.rs	1201	impl<T: Copy> ScopedCell<T> {	COMMENT
LOW	crates/common/src/lib.rs	1261	///	COMMENT
LOW	crates/common/src/lib.rs	1301	///	COMMENT
LOW	crates/common/src/lib.rs	1321	/// A RAII cleanup object. Unlike in C++ where there is no borrow checker, we can't just provide a	COMMENT
LOW	crates/common/src/lib.rs	1381		COMMENT
LOW	crates/common/src/lib.rs	1401	/// ];	COMMENT
LOW	crates/widestring/src/lib.rs	41	//	COMMENT
LOW	crates/widestring/src/lib.rs	121		COMMENT
LOW	crates/widestring/src/lib.rs	341	/// PUA-encoded chars into a char iterator where each encoded non-UTF-8 byte is replaced by the	COMMENT
LOW	crates/widestring/src/lib.rs	361	/// non-empty. In the [`Self::next`] and [`Self::next_back`] implementations, this logic is	COMMENT
LOW	crates/widestring/src/lib.rs	581		COMMENT
LOW	crates/xtask/src/gettext.rs	21		COMMENT
LOW	crates/xtask/src/fluent.rs	41	from_source: Option<Option<PathBuf>>,	COMMENT
LOW	crates/xtask/src/fluent.rs	61	/// If a Fluent variable is renamed or removed, the translations of the message will be deleted.	COMMENT
LOW	crates/xtask/src/fluent.rs	81	/// The message ID.	COMMENT
LOW	crates/xtask/src/fluent.rs	101	/// indicate that translators should have a look at it.	COMMENT
LOW	crates/xtask/src/main.rs	41	/// Run ShellCheck on non-fish shell scripts	COMMENT
LOW	doc_src/conf.py	141		COMMENT
LOW	doc_src/conf.py	161	# -- Options for HTML output -------------------------------------------------	COMMENT
LOW	doc_src/conf.py	281		COMMENT
LOW	tests/fish_test_helper.c	1	// fish_test_helper is a little program with no fish dependencies that acts like certain other	COMMENT
LOW	tests/pexpects/commandline.py	121	# send(control("u") * 6)	COMMENT
LOW	tests/pexpects/bind.py	141	# Delay needed to allow fish to transition to vi "normal" mode.	COMMENT
LOW	tests/pexpects/history.py	1	#!/usr/bin/env python3	COMMENT
LOW	src/job_group.rs	61	pub struct JobGroup {	COMMENT
LOW	src/timer.rs	1	//! This module houses `TimerSnapshot` which can be used to calculate the elapsed time (system CPU	COMMENT
LOW	src/exec.rs	121	}	COMMENT
LOW	src/exec.rs	361	}	COMMENT
LOW	src/exec.rs	461	//	COMMENT
LOW	src/exec.rs	1241	/// is the first or last process).	COMMENT
LOW	src/exec.rs	1261	// what we want to happen is this:	COMMENT
LOW	src/tty_handoff.rs	341		COMMENT
LOW	src/tty_handoff.rs	441	// Check who own the tty now. There's four cases of interest:	COMMENT
LOW	src/tty_handoff.rs	461	}	COMMENT
LOW	src/parse_util.rs	961	// This is a bit of a hack - it indents cases like:	COMMENT
LOW	src/parse_util.rs	981	// cas	COMMENT
LOW	src/terminal.rs	341		COMMENT
LOW	src/proc.rs	341	impl fish_printf::ToArg<'static> for Pid {	COMMENT
LOW	src/proc.rs	361	/// array and `actual_cmd` is the absolute path of the command to execute.	COMMENT
LOW	src/proc.rs	1141		COMMENT
LOW	src/screen.rs	221		COMMENT
LOW	src/screen.rs	1281	}	COMMENT
LOW	src/screen.rs	1881	commandline_before_suggestion,	COMMENT
62 more matches not shown…

Cross-Language Confusion15 hits · 74 pts

Severity	File	Line	Snippet	Context
HIGH	tests/pexpects/wildcard_tab.py	67	sendline(r"mkdir benchmarks && mkdir benchmarks/somedir && touch benchmarks/somefile")	CODE
HIGH	tests/pexpects/pipeline.py	28	# 'not' because we expect to have no jobs, in which case `jobs` will return false	COMMENT
HIGH⚡	tests/pexpects/isatty.py	20	test -t 0 && echo stdin	STRING
HIGH⚡	tests/pexpects/isatty.py	21	test -t 1 && echo stdout	STRING
HIGH⚡	tests/pexpects/isatty.py	22	test -t 2 && echo stderr	STRING
HIGH	tests/pexpects/isatty.py	60	sendline("isatty stdin && echo yes")	CODE
HIGH	tests/pexpects/isatty.py	64	sendline("cat </dev/null \| isatty stdin \|\| echo no")	CODE
HIGH	tests/pexpects/autosuggest.py	77	run("touch configure && chmod +x configure")	CODE
HIGH	tests/pexpects/status.py	28	sendline("true 7 && status current-commandline")	CODE
HIGH	tests/pexpects/status.py	29	expect_prompt("\r\n.*true 7 && status current-commandline\r\n")	CODE
HIGH	tests/pexpects/read.py	58	sendline(r"read -c init_text somevar && echo $somevar")	CODE
HIGH	tests/pexpects/read.py	63	sendline(r"read --command='some other text' somevar && echo $somevar")	CODE
HIGH	share/tools/web_config/webconfig.py	807	+ "if set -q __fish_initialized && test $__fish_initialized -lt 4300\n"	CODE
HIGH	share/tools/web_config/webconfig.py	999	+ "funcsave fish_prompt && funcsave fish_right_prompt 2>/dev/null"	CODE
HIGH	share/tools/web_config/webconfig.py	1019	+ '" \n false \n functions -q fish_right_prompt && fish_right_prompt\n'	CODE

Decorative Section Separators13 hits · 54 pts

Severity	File	Line	Snippet	Context
MEDIUM	tests/pexpects/read.py	126	# ==========	COMMENT
MEDIUM⚡	tests/pexpects/history.py	32	# ==========	COMMENT
MEDIUM⚡	tests/pexpects/history.py	37	# ==========	COMMENT
MEDIUM⚡	tests/pexpects/history.py	39	# ==========	COMMENT
MEDIUM⚡	tests/pexpects/history.py	41	# ==========	COMMENT
MEDIUM⚡	tests/pexpects/history.py	50	# ==========	COMMENT
MEDIUM⚡	tests/pexpects/history.py	52	# ==========	COMMENT
MEDIUM⚡	tests/pexpects/history.py	54	# ==========	COMMENT
MEDIUM⚡	tests/pexpects/history.py	60	# ==========	COMMENT
MEDIUM⚡	tests/pexpects/history.py	65	# ==========	COMMENT
MEDIUM⚡	tests/pexpects/history.py	72	# ==========	COMMENT
MEDIUM	tests/pexpects/history.py	99	# ==========	COMMENT
MEDIUM	tests/pexpects/history.py	106	# ==========	COMMENT

Deep Nesting25 hits · 25 pts

Severity	File	Line	Context
LOW	doc_src/fish_synopsis.py	85	CODE
LOW	doc_src/conf.py	219	CODE
LOW	tests/test_driver.py	111	CODE
LOW	tests/test_driver.py	306	CODE
LOW	tests/pexpect_helper.py	75	CODE
LOW	tests/littlecheck.py	796	CODE
LOW	tests/littlecheck.py	207	CODE
LOW	share/tools/create_manpage_completions.py	1251	CODE
LOW	share/tools/create_manpage_completions.py	1872	CODE
LOW	share/tools/create_manpage_completions.py	2088	CODE
LOW	share/tools/create_manpage_completions.py	468	CODE
LOW	share/tools/create_manpage_completions.py	517	CODE
LOW	share/tools/create_manpage_completions.py	588	CODE
LOW	share/tools/create_manpage_completions.py	655	CODE
LOW	share/tools/create_manpage_completions.py	680	CODE
LOW	share/tools/create_manpage_completions.py	885	CODE
LOW	share/tools/create_manpage_completions.py	930	CODE
LOW	share/tools/create_manpage_completions.py	1092	CODE
LOW	share/tools/create_manpage_completions.py	1708	CODE
LOW	share/tools/web_config/webconfig.py	229	CODE
LOW	share/tools/web_config/webconfig.py	1429	CODE
LOW	share/tools/web_config/webconfig.py	1125	CODE
LOW	share/tools/web_config/webconfig.py	1146	CODE
LOW	share/tools/web_config/webconfig.py	1183	CODE
LOW	share/tools/web_config/webconfig.py	267	CODE

Synthetic Comment Markers2 hits · 15 pts

Severity	File	Line	Snippet	Context
HIGH	src/ast.rs	2362	// exhausted the stream as requested.	COMMENT
HIGH	src/builtins/read.rs	306	/// Read from the fd in chunks until we see newline or null, as requested, is seen. This is only	COMMENT

Hyper-Verbose Identifiers14 hits · 12 pts

Severity	File	Line	Snippet	Context
LOW	tests/pexpect_helper.py	197	def send_cursor_position_report(self, *, y: int, x: int):	CODE
LOW	tests/pexpect_helper.py	202	def send_primary_device_attribute(self):	CODE
LOW	tests/pexpect_helper.py	285	def report_exception_and_exit(self, pat, unmatched, err):	CODE
LOW	share/tools/create_manpage_completions.py	1851	def cleanup_autogenerated_completions_in_directory(dir):	STRING
LOW	share/tools/create_manpage_completions.py	1864	def cleanup_autogenerated_file(path):	STRING
LOW	share/tools/create_manpage_completions.py	2018	def parse_and_output_man_pages(paths, output_directory, show_progress):	STRING
LOW	share/tools/create_manpage_completions.py	2088	def get_paths_from_man_locations():	STRING
LOW	share/tools/web_config/webconfig.py	356	def html_color_for_ansi_color_index(val):	CODE
LOW	share/tools/web_config/webconfig.py	625	def append_html_for_ansi_escape(full_val, result, span_open):	CODE
LOW	share/tools/web_config/webconfig.py	800	class FishConfigHTTPRequestHandler(SimpleHTTPServer.SimpleHTTPRequestHandler):	CODE
LOW	share/tools/web_config/webconfig.py	963	def do_set_color_for_variable(self, name, color):	CODE
LOW	share/tools/web_config/webconfig.py	1053	def parse_one_sample_prompt_hash(self, line, result_dict):	CODE
LOW	share/tools/web_config/webconfig.py	1094	def do_get_sample_prompts_list(self):	CODE
LOW	share/tools/web_config/webconfig.py	1125	def font_size_for_ansi_prompt(self, prompt_demo_ansi):	CODE

AI Slop Vocabulary4 hits · 8 pts

Severity	File	Line	Snippet	Context
MEDIUM	tests/littlecheck.py	838	# To facilitate integration with testing frameworks, use exit code 125 to indicate that all	COMMENT
MEDIUM	tests/pexpects/history.py	8	# meant to be a comprehensive test of the history subsystem. Those types of	COMMENT
LOW	build_tools/make_linux_packages.sh	72	# just use dpkg-buildpackage directly	COMMENT
LOW	share/tools/create_manpage_completions.py	2104	# If we can't have the OS interpret $MANPATH, just use it as-is (gulp).	STRING

Self-Referential Comments4 hits · 8 pts

Severity	File	Line	Snippet	Context
MEDIUM	src/env_universal_common.rs	634	const SAVE_MSG: &[u8] = b"# This file contains fish universal variable definitions.\n";	CODE
MEDIUM	src/env_universal_common.rs	930	"# This file contains fish universal variable definitions.\n",	CODE
MEDIUM	src/env_universal_common.rs	948	"# This file contains fish universal variable definitions.\n",	CODE
MEDIUM	src/env_universal_common.rs	1000	"# This file contains fish universal variable definitions.\n",	CODE

Slop Phrases4 hits · 8 pts

Severity	File	Line	Snippet	Context
LOW	Cargo.toml	10	# don't forget to update COPYING and debian/copyright too	COMMENT
LOW	Cargo.toml	10	# don't forget to update COPYING and debian/copyright too	COMMENT
LOW	src/parser_keywords.rs	40	// Don't forget to add any new reserved keywords to the documentation	COMMENT
MEDIUM	src/builtins/string/shorten.rs	155	// This should work for most cases considering the combiners typically have width 0.	COMMENT

Unused Imports7 hits · 7 pts

Severity	File	Line	Context
LOW	doc_src/fish_indent_lexer.py	7	CODE
LOW	doc_src/conf.py	19	CODE
LOW	tests/test_driver.py	21	CODE
LOW	tests/pexpect_helper.py	16	CODE
LOW	tests/littlecheck.py	5	CODE
LOW	tests/littlecheck.py	6	CODE
LOW	share/tools/web_config/webconfig.py	4	CODE

AI Structural Patterns2 hits · 2 pts

Severity	File	Line	Snippet	Context
LOW	share/tools/create_manpage_completions.py	1362		CODE
LOW	share/tools/web_config/webconfig.py	1045		CODE

Example Usage Blocks1 hit · 2 pts

Severity	File	Line	Snippet	Context
LOW	doc_src/fish_synopsis.py	3	# Example usage:	COMMENT

Redundant / Tautological Comments1 hit · 2 pts

Severity	File	Line	Snippet	Context
LOW	src/fs.rs	280	/// # Return value	COMMENT

Excessive Try-Catch Wrapping1 hit · 1 pts

Severity	File	Line	Snippet	Context
LOW	tests/test_driver.py	233	except Exception as e:	CODE

Analysis Overview

What These Metrics Mean

Score History

Severity Breakdown

Directory Score Breakdown

Pattern Findings