A YAML parser and emitter in C++
This report presents the forensic synthetic code analysis of jbeder/yaml-cpp, a C++ project with 6,127 GitHub stars. SynthScan v2.0 examined 88,739 lines of code across 256 source files, recording 585 pattern matches distributed across 12 syntactic categories. The overall adjusted score of 6.6 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).
Longitudinal tracking requires multiple scan runs. Once this repository is re-scanned after new commits land, this chart will visualise how the synthetic code signal evolves over time — enabling you to detect whether AI authorship is growing, stabilising, or being actively corrected by human engineers.
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.
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.
The scanner identified 585 distinct pattern matches across 12 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.
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | test/integration/emitter_test.cpp | 1441 | ExpectEmit("[null, NULL, Null, ~]"); | COMMENT |
| LOW | test/googletest-1.16.0/ci/macos-presubmit.sh | 1 | #!/bin/bash | COMMENT |
| LOW | test/googletest-1.16.0/ci/macos-presubmit.sh | 21 | # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | COMMENT |
| LOW | test/googletest-1.16.0/ci/linux-presubmit.sh | 1 | #!/bin/bash | COMMENT |
| LOW | test/googletest-1.16.0/docs/advanced.md | 941 | COMMENT | |
| LOW | test/googletest-1.16.0/googletest/CMakeLists.txt | 1 | ######################################################################## | COMMENT |
| LOW | test/googletest-1.16.0/googletest/CMakeLists.txt | 181 | ######################################################################## | COMMENT |
| LOW | …st-1.16.0/googletest/test/gtest_xml_output_unittest.py | 1 | #!/usr/bin/env python | COMMENT |
| LOW | …st-1.16.0/googletest/test/googletest-param-test-test.h | 1 | // Copyright 2008, Google Inc. | COMMENT |
| LOW | …st-1.16.0/googletest/test/googletest-param-test-test.h | 21 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | COMMENT |
| LOW | …etest-1.16.0/googletest/test/googletest-output-test.py | 1 | #!/usr/bin/env python | COMMENT |
| LOW | …etest/test/googletest-param-test-invalid-name1-test.py | 1 | #!/usr/bin/env python | COMMENT |
| LOW | …t/googletest-1.16.0/googletest/test/gtest_help_test.py | 1 | #!/usr/bin/env python | COMMENT |
| LOW | …t/googletest-1.16.0/googletest/test/gtest_help_test.py | 21 | # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | COMMENT |
| LOW | …gletest/test/googletest-global-environment-unittest.py | 1 | # Copyright 2021 Google Inc. All Rights Reserved. | COMMENT |
| LOW | …/googletest-1.16.0/googletest/test/gtest_test_utils.py | 1 | # Copyright 2006, Google Inc. | COMMENT |
| LOW | …letest-1.16.0/googletest/test/gtest_json_test_utils.py | 1 | # Copyright 2018, Google Inc. | COMMENT |
| LOW | …etest/test/googletest-param-test-invalid-name2-test.py | 1 | #!/usr/bin/env python | COMMENT |
| LOW | …6.0/googletest/test/googletest-json-output-unittest.py | 1 | #!/usr/bin/env python | COMMENT |
| LOW | …oogletest/test/googletest-break-on-failure-unittest.py | 1 | #!/usr/bin/env python | COMMENT |
| LOW | …16.0/googletest/test/googletest-setuptestsuite-test.py | 1 | #!/usr/bin/env python | COMMENT |
| LOW | …16.0/googletest/test/googletest-list-tests-unittest.py | 1 | #!/usr/bin/env python | COMMENT |
| LOW | …test-1.16.0/googletest/test/googletest-env-var-test.py | 1 | #!/usr/bin/env python | COMMENT |
| LOW | …test-1.16.0/googletest/test/gtest_xml_outfiles_test.py | 1 | #!/usr/bin/env python | COMMENT |
| LOW | …gletest-1.16.0/googletest/test/gtest-typed-test_test.h | 1 | // Copyright 2008 Google Inc. | COMMENT |
| LOW | …gletest-1.16.0/googletest/test/gtest-typed-test_test.h | 21 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | COMMENT |
| LOW | …t-1.16.0/googletest/test/gtest_list_output_unittest.py | 1 | #!/usr/bin/env python | COMMENT |
| LOW | …gletest-1.16.0/googletest/test/gtest_xml_test_utils.py | 1 | # Copyright 2006, Google Inc. | COMMENT |
| LOW | test/googletest-1.16.0/googletest/test/production.h | 1 | // Copyright 2006, Google Inc. | COMMENT |
| LOW | test/googletest-1.16.0/googletest/test/production.h | 21 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | COMMENT |
| LOW | …letest-1.16.0/googletest/test/googletest-color-test.py | 1 | #!/usr/bin/env python | COMMENT |
| LOW | …t-1.16.0/googletest/test/googletest-filter-unittest.py | 1 | #!/usr/bin/env python | COMMENT |
| LOW | …1.16.0/googletest/test/gtest_skip_check_output_test.py | 1 | #!/usr/bin/env python | COMMENT |
| LOW | …letest-1.16.0/googletest/test/gtest_testbridge_test.py | 1 | #!/usr/bin/env python | COMMENT |
| LOW | ….0/googletest/test/googletest-throw-on-failure-test.py | 1 | #!/usr/bin/env python | COMMENT |
| LOW | …test-1.16.0/googletest/test/googletest-shuffle-test.py | 1 | #!/usr/bin/env python | COMMENT |
| LOW | …test-1.16.0/googletest/test/googletest-shuffle-test.py | 21 | # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | COMMENT |
| LOW | ….16.0/googletest/test/googletest-uninitialized-test.py | 1 | #!/usr/bin/env python | COMMENT |
| LOW | ….0/googletest/test/googletest-catch-exceptions-test.py | 1 | #!/usr/bin/env python | COMMENT |
| LOW | ….16.0/googletest/test/googletest-json-outfiles-test.py | 1 | #!/usr/bin/env python | COMMENT |
| LOW | …etest/test/gtest_skip_environment_check_output_test.py | 1 | #!/usr/bin/env python | COMMENT |
| LOW | …1.16.0/googletest/test/googletest-failfast-unittest.py | 1 | #!/usr/bin/env python | COMMENT |
| LOW | …etest-1.16.0/googletest/include/gtest/gtest-matchers.h | 1 | // Copyright 2007, Google Inc. | COMMENT |
| LOW | …etest-1.16.0/googletest/include/gtest/gtest-matchers.h | 21 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | COMMENT |
| LOW | …etest-1.16.0/googletest/include/gtest/gtest-matchers.h | 41 | COMMENT | |
| LOW | …etest-1.16.0/googletest/include/gtest/gtest-matchers.h | 61 | 4251 GTEST_MAYBE_5046_ /* class A needs to have dll-interface to be used by | COMMENT |
| LOW | …etest-1.16.0/googletest/include/gtest/gtest-matchers.h | 141 | public: | COMMENT |
| LOW | …etest-1.16.0/googletest/include/gtest/gtest-matchers.h | 161 | // "is empty" matcher probably only needs to explain what the actual | COMMENT |
| LOW | …etest-1.16.0/googletest/include/gtest/gtest-matchers.h | 601 | return os; | COMMENT |
| LOW | …est-1.16.0/googletest/include/gtest/gtest-death-test.h | 1 | // Copyright 2005, Google Inc. | COMMENT |
| LOW | …est-1.16.0/googletest/include/gtest/gtest-death-test.h | 21 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | COMMENT |
| LOW | …est-1.16.0/googletest/include/gtest/gtest-death-test.h | 41 | #define GOOGLETEST_INCLUDE_GTEST_GTEST_DEATH_TEST_H_ | COMMENT |
| LOW | …est-1.16.0/googletest/include/gtest/gtest-death-test.h | 61 | // tests. IMPORTANT: This is an internal utility. Using it may break the | COMMENT |
| LOW | …est-1.16.0/googletest/include/gtest/gtest-death-test.h | 81 | // | COMMENT |
| LOW | …est-1.16.0/googletest/include/gtest/gtest-death-test.h | 101 | // | COMMENT |
| LOW | …est-1.16.0/googletest/include/gtest/gtest-death-test.h | 121 | // learn wherever you come from. In the following: 'A' denotes a | COMMENT |
| LOW | …est-1.16.0/googletest/include/gtest/gtest-death-test.h | 141 | // A* matches 0 or many occurrences of A | COMMENT |
| LOW | …est-1.16.0/googletest/include/gtest/gtest-death-test.h | 161 | // simplicity, the current implementation doesn't search the PATH | COMMENT |
| LOW | …est-1.16.0/googletest/include/gtest/gtest-death-test.h | 221 | // since the sideeffects of the call are only visible in opt mode, and not | COMMENT |
| LOW | …est-1.16.0/googletest/include/gtest/gtest-death-test.h | 241 | // // opt-mode has sideeffect visible. | COMMENT |
| 473 more matches not shown… | ||||
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| HIGH | …etest/test/googletest-param-test-invalid-name1-test.py | 0 | verifies that google test warns the user when not initialized properly. | STRING |
| HIGH | …etest/test/googletest-param-test-invalid-name2-test.py | 0 | verifies that google test warns the user when not initialized properly. | STRING |
| HIGH | ….16.0/googletest/test/googletest-uninitialized-test.py | 0 | verifies that google test warns the user when not initialized properly. | STRING |
| HIGH | …etest/test/googletest-param-test-invalid-name1-test.py | 0 | runs the given command and verifies its exit code and output. | STRING |
| HIGH | …etest/test/googletest-param-test-invalid-name2-test.py | 0 | runs the given command and verifies its exit code and output. | STRING |
| HIGH | ….16.0/googletest/test/googletest-uninitialized-test.py | 0 | runs the given command and verifies its exit code and output. | STRING |
| HIGH | …test-1.16.0/googletest/test/googletest-env-var-test.py | 0 | sets the env variable to 'value'; unsets it when 'value' is none. | STRING |
| HIGH | …letest-1.16.0/googletest/test/googletest-color-test.py | 0 | sets the env variable to 'value'; unsets it when 'value' is none. | STRING |
| HIGH | …t-1.16.0/googletest/test/googletest-filter-unittest.py | 0 | sets the env variable to 'value'; unsets it when 'value' is none. | STRING |
| HIGH | …1.16.0/googletest/test/googletest-failfast-unittest.py | 0 | sets the env variable to 'value'; unsets it when 'value' is none. | STRING |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| MEDIUM | …est-1.16.0/googletest/include/gtest/gtest-death-test.h | 152 | // This implementation is *not* meant to be as highly tuned or robust | COMMENT |
| MEDIUM | …est-1.16.0/googletest/include/gtest/gtest-death-test.h | 224 | // In practice, this can be used to test functions that utilize the | COMMENT |
| MEDIUM | src/contrib/dragonbox.h | 1227 | // Without the bound on n_max (which compilers these days never leverage), the | COMMENT |
| MEDIUM | src/contrib/dragonbox.h | 1237 | // Without the bound on n_max (which compilers these days never leverage), the | COMMENT |
| MEDIUM | src/contrib/dragonbox.h | 1250 | // Without the bound on n_max (which compilers these days never leverage), the | COMMENT |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | src/contrib/dragonbox.h | 3390 | // Step 1: Schubfach multiplier calculation. | COMMENT |
| LOW | src/contrib/dragonbox.h | 3426 | // Step 2: Try larger divisor; remove trailing zeros if necessary. | COMMENT |
| LOW | src/contrib/dragonbox.h | 3484 | // Step 3: Find the significand with the smaller divisor. | COMMENT |
| LOW | src/contrib/dragonbox.h | 3587 | // Step 1: Schubfach multiplier calculation. | COMMENT |
| LOW | src/contrib/dragonbox.h | 3626 | // Step 2: Try larger divisor; remove trailing zeros if necessary. | COMMENT |
| LOW | src/contrib/dragonbox.h | 3683 | // Step 3: Find the significand with the smaller divisor. | COMMENT |
| LOW | src/contrib/dragonbox.h | 3731 | // Step 1: Schubfach multiplier calculation. | COMMENT |
| LOW | src/contrib/dragonbox.h | 3757 | // Step 2: Try larger divisor; remove trailing zeros if necessary. | COMMENT |
| LOW | src/contrib/dragonbox.h | 3791 | // Step 3: Find the significand with the small divisor. | COMMENT |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | src/contrib/dragonbox.h | 3390 | // Step 1: Schubfach multiplier calculation. | COMMENT |
| LOW | src/contrib/dragonbox.h | 3426 | // Step 2: Try larger divisor; remove trailing zeros if necessary. | COMMENT |
| LOW | src/contrib/dragonbox.h | 3484 | // Step 3: Find the significand with the smaller divisor. | COMMENT |
| LOW | src/contrib/dragonbox.h | 3587 | // Step 1: Schubfach multiplier calculation. | COMMENT |
| LOW | src/contrib/dragonbox.h | 3626 | // Step 2: Try larger divisor; remove trailing zeros if necessary. | COMMENT |
| LOW | src/contrib/dragonbox.h | 3683 | // Step 3: Find the significand with the smaller divisor. | COMMENT |
| LOW | src/contrib/dragonbox.h | 3731 | // Step 1: Schubfach multiplier calculation. | COMMENT |
| LOW | src/contrib/dragonbox.h | 3757 | // Step 2: Try larger divisor; remove trailing zeros if necessary. | COMMENT |
| LOW | src/contrib/dragonbox.h | 3791 | // Step 3: Find the significand with the small divisor. | COMMENT |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | test/create-emitter-tests.py | 8 | CODE | |
| LOW | test/create-emitter-tests.py | 123 | CODE | |
| LOW | test/create-emitter-tests.py | 174 | CODE | |
| LOW | …letest-1.16.0/googletest/test/gtest_json_test_utils.py | 35 | CODE | |
| LOW | …letest-1.16.0/googletest/test/gtest_json_test_utils.py | 46 | CODE | |
| LOW | …gletest-1.16.0/googletest/test/gtest_xml_test_utils.py | 131 | CODE | |
| LOW | …gletest-1.16.0/googletest/test/gtest_xml_test_utils.py | 186 | CODE |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| HIGH | …/googletest-1.16.0/googletest/test/gtest_test_utils.py | 200 | Changes into a specified directory, if provided, and executes a command. Restores the old directory afterwards. | STRING |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | test/integration/emitter_test.cpp | 1243 | "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed eiusmod " | CODE |
| LOW | test/integration/emitter_test.cpp | 1243 | "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed eiusmod " | CODE |
| LOW | test/googletest-1.16.0/docs/reference/mocking.md | 278 | .WillRepeatedly(Return("John Doe")); // Return "John Doe" on all calls | CODE |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | …t/googletest-1.16.0/googletest/test/gtest_help_test.py | 130 | def test_prints_help_with_full_flag(self): | CODE |
| LOW | …t/googletest-1.16.0/googletest/test/gtest_help_test.py | 157 | def test_runs_tests_without_help_flag(self): | CODE |
| LOW | …t/googletest-1.16.0/googletest/test/gtest_help_test.py | 168 | def test_runs_tests_with_gtest_internal_flag(self): | CODE |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | …etest-1.16.0/googletest/test/googletest-output-test.py | 215 | CODE | |
| LOW | …googletest-1.16.0/googlemock/test/gmock_output_test.py | 72 | CODE |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | …test-1.16.0/googletest/test/gtest_xml_outfiles_test.py | 35 | CODE | |
| LOW | …gletest-1.16.0/googletest/test/gtest_xml_test_utils.py | 33 | CODE |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | …t-1.16.0/googletest/test/googletest-filter-unittest.py | 69 | # Check if this platform can unset environment variables in child processes. | COMMENT |