Abseil Common Libraries (C++)
This report presents the forensic synthetic code analysis of abseil/abseil-cpp, a C++ project with 17,970 GitHub stars. SynthScan v2.0 examined 114,746 lines of code across 440 source files, recording 1988 pattern matches distributed across 5 syntactic categories. The overall adjusted score of 16.6 places this repository in the Moderate 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).
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.
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 1988 distinct pattern matches across 5 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 | CMakeLists.txt | 1 | # | COMMENT |
| LOW | create_lts.py | 1 | #!/usr/bin/env python3 | COMMENT |
| LOW | CMake/install_test_project/CMakeLists.txt | 1 | # | COMMENT |
| LOW | CMake/install_test_project/test.sh | 1 | #!/bin/bash | COMMENT |
| LOW | ci/linux_gcc-latest_libstdcxx_bazel.sh | 1 | #!/bin/bash | COMMENT |
| LOW | ci/macos_xcode_bazel.sh | 1 | #!/bin/bash | COMMENT |
| LOW | ci/linux_clang-latest_libstdcxx_bazel.sh | 1 | #!/bin/bash | COMMENT |
| LOW | ci/linux_docker_containers.sh | 1 | # Copyright 2019 The Abseil Authors. | COMMENT |
| LOW | ci/absl_alternate_options.h | 1 | // Copyright 2019 The Abseil Authors. | COMMENT |
| LOW | ci/absl_alternate_options.h | 21 | #define ABSL_CI_ABSL_ALTERNATE_OPTIONS_H_ | COMMENT |
| LOW | ci/linux_arm_clang-latest_libcxx_bazel.sh | 1 | #!/bin/bash | COMMENT |
| LOW | ci/linux_gcc_alpine_cmake.sh | 1 | #!/bin/bash | COMMENT |
| LOW | ci/linux_clang-latest_libcxx_asan_bazel.sh | 1 | #!/bin/bash | COMMENT |
| LOW | ci/macos_xcode_cmake.sh | 1 | #!/bin/bash | COMMENT |
| LOW | ci/cmake_install_test.sh | 1 | #!/bin/bash | COMMENT |
| LOW | ci/linux_gcc-latest_libstdcxx_cmake.sh | 1 | #!/bin/bash | COMMENT |
| LOW | ci/linux_clang-latest_libcxx_tsan_bazel.sh | 1 | #!/bin/bash | COMMENT |
| LOW | ci/linux_gcc-floor_libstdcxx_bazel.sh | 1 | #!/bin/bash | COMMENT |
| LOW | ci/cmake_common.sh | 1 | # Copyright 2020 The Abseil Authors. | COMMENT |
| LOW | ci/linux_clang-latest_libcxx_bazel.sh | 1 | #!/bin/bash | COMMENT |
| LOW | absl/CMakeLists.txt | 1 | # | COMMENT |
| LOW | absl/strings/has_ostream_operator.h | 1 | // Copyright 2023 The Abseil Authors | COMMENT |
| LOW | absl/strings/numbers.h | 1 | // Copyright 2017 The Abseil Authors. | COMMENT |
| LOW | absl/strings/numbers.h | 21 | // which automatically detect and convert most number values appropriately. | COMMENT |
| LOW | absl/strings/numbers.h | 41 | #include <type_traits> | COMMENT |
| LOW | absl/strings/numbers.h | 61 | // integer type (optionally preceded by a `+` or `-`). If any errors are | COMMENT |
| LOW | absl/strings/numbers.h | 81 | // Converts the given string (optionally followed or preceded by ASCII | COMMENT |
| LOW | absl/strings/numbers.h | 181 | // Helper function used to implement absl::HighPrecision(). | COMMENT |
| LOW | absl/strings/CMakeLists.txt | 1 | # | COMMENT |
| LOW | absl/strings/cord_analysis.h | 1 | // Copyright 2021 The Abseil Authors | COMMENT |
| LOW | absl/strings/cord_analysis.h | 21 | #include "absl/base/config.h" | COMMENT |
| LOW | absl/strings/cord_analysis.h | 41 | // cord.append(some_other_cord); | COMMENT |
| LOW | absl/strings/cord_test_helpers.h | 1 | // | COMMENT |
| LOW | absl/strings/cord_test_helpers.h | 81 | COMMENT | |
| LOW | absl/strings/str_format.h | 1 | // | COMMENT |
| LOW | absl/strings/str_format.h | 21 | // `printf()` string formatting routines within the `<cstdio>` standard library | COMMENT |
| LOW | absl/strings/str_format.h | 41 | // | COMMENT |
| LOW | absl/strings/str_format.h | 61 | // | COMMENT |
| LOW | absl/strings/str_format.h | 81 | #include "absl/base/attributes.h" | COMMENT |
| LOW | absl/strings/str_format.h | 121 | str_format_internal::UntypedFormatSpecImpl spec_; | COMMENT |
| LOW | absl/strings/str_format.h | 141 | // conversions, which denote the number of characters written by a formatting | COMMENT |
| LOW | absl/strings/str_format.h | 161 | friend struct str_format_internal::FormatCountCaptureHelper; | COMMENT |
| LOW | absl/strings/str_format.h | 181 | // | COMMENT |
| LOW | absl/strings/str_format.h | 201 | // absl::ParsedFormat<'s', 'd'> formatString("Welcome to %s, Number %d!"); | COMMENT |
| LOW | absl/strings/str_format.h | 221 | // * `p` for pointer address values | COMMENT |
| LOW | absl/strings/str_format.h | 241 | // "%s", "C" -> "C" | COMMENT |
| LOW | absl/strings/str_format.h | 261 | // (instead of 1 or 0 for booleans formatted using d). `const char*` is not | COMMENT |
| LOW | absl/strings/str_format.h | 281 | // Clang. On MSVC, these checks are performed at runtime instead. | COMMENT |
| LOW | absl/strings/str_format.h | 301 | // absl::ParsedFormat<'s', 'd'> format_string("Welcome to %s, Number %d!"); | COMMENT |
| LOW | absl/strings/str_format.h | 321 | // // Extended format supports multiple conversion characters per argument, | COMMENT |
| LOW | absl/strings/str_format.h | 341 | COMMENT | |
| LOW | absl/strings/str_format.h | 361 | // EXPECT_EQ("Welcome to The Village, Number 6!", s); | COMMENT |
| LOW | absl/strings/str_format.h | 381 | // std::cout << StrAppendFormat(&orig, "%12.6f", 3.14); | COMMENT |
| LOW | absl/strings/str_format.h | 401 | template <typename... Args> | COMMENT |
| LOW | absl/strings/str_format.h | 421 | // | COMMENT |
| LOW | absl/strings/str_format.h | 441 | // | COMMENT |
| LOW | absl/strings/str_format.h | 461 | // | COMMENT |
| LOW | absl/strings/str_format.h | 481 | // ----------------------------------------------------------------------------- | COMMENT |
| LOW | absl/strings/str_format.h | 521 | // appended to it. | COMMENT |
| LOW | absl/strings/str_format.h | 541 | // `FormatUntyped()`. You may construct `FormatArg` by passing | COMMENT |
| 1904 more matches not shown… | ||||
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| MEDIUM | absl/debugging/stacktrace.h | 27 | // Note: stack traces in Abseil that do not utilize a symbolizer will result in | COMMENT |
| MEDIUM | absl/meta/type_traits.h | 564 | // If it ever becomes possible to detect [[gsl::Owner]], we should leverage it: | COMMENT |
| MEDIUM | absl/meta/type_traits.h | 607 | // If it ever becomes possible to detect [[gsl::Pointer]], we should leverage | COMMENT |
| MEDIUM | absl/meta/type_traits.h | 632 | // we should change the implementation to leverage that. | COMMENT |
| MEDIUM | absl/log/scoped_mock_log.h | 57 | // // Simple robust setup, ignores unexpected logs. | COMMENT |
| MEDIUM | absl/log/check.h | 29 | // compromise. It is also more robust and portable to deliberately terminate | COMMENT |
| MEDIUM | absl/log/absl_check.h | 27 | // compromise. It is also more robust and portable to deliberately terminate | COMMENT |
| MEDIUM | absl/random/bernoulli_distribution.h | 161 | // greater than or equal to 1, the same would be true for `p`. Certainly `p` | COMMENT |
| MEDIUM | absl/random/internal/nanobenchmark.h | 19 | // prediction hit rates. Uses a robust estimator to summarize the measurements. | COMMENT |
| MEDIUM | absl/random/internal/nanobenchmark.h | 45 | // which is more robust to outliers and skewed data than the mean or median. | COMMENT |
| MEDIUM | absl/base/options.h | 39 | // Diamond dependency problems can be avoided if all packages utilize the same | COMMENT |
| MEDIUM | absl/base/internal/poison.h | 48 | // Non-optimized builds may use more robust implementation. Note that we can't | COMMENT |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | absl/strings/resize_and_overwrite.h | 31 | // Example usage: | COMMENT |
| LOW | absl/strings/internal/generic_printer.h | 46 | // Example usage: | COMMENT |
| LOW | absl/strings/internal/generic_printer.h | 85 | // Example usage: | COMMENT |
| LOW | absl/synchronization/mutex.h | 180 | // Example usage: | COMMENT |
| LOW | absl/hash/internal/hash.h | 171 | // Example usage: | COMMENT |
| LOW | absl/debugging/internal/vdso_support.h | 30 | // Example usage: | COMMENT |
| LOW | absl/meta/internal/requires.h | 30 | // Example usage: | COMMENT |
| LOW | absl/base/internal/raw_logging.h | 39 | // Usage example: | COMMENT |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | absl/status/status.h | 532 | // NOTE: This function should only be called when converting to an associated | COMMENT |
| LOW | absl/status/status.h | 623 | // NOTE: This function does nothing if the Status is ok. | COMMENT |
| LOW | absl/status/status_builder.h | 597 | // NOTE: This function is `static` to prevent escaping the `this` pointer. We | COMMENT |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | absl/functional/any_invocable_test.h | 148 | char dummy_data[absl::internal_any_invocable::kStorageSize + 1] = {}; | CODE |