🥧 Savoury implementation of the QUIC transport protocol and HTTP/3
This report presents the forensic synthetic code analysis of cloudflare/quiche, a Rust project with 11,724 GitHub stars. SynthScan v2.0 examined 147,713 lines of code across 284 source files, recording 663 pattern matches distributed across 6 syntactic categories. The overall adjusted score of 4.1 places this repository in the Likely human-written 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 663 distinct pattern matches across 6 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 | Cross.toml | 1 | # Use `cross`'s `edge` images instead of the default `latest` (pinned to | COMMENT |
| LOW | qlog/tests/writer_roundtrip.rs | 1 | // Copyright (C) 2026, Cloudflare, Inc. | COMMENT |
| LOW | qlog/tests/writer_roundtrip.rs | 21 | // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | COMMENT |
| LOW | qlog/tests/writer_roundtrip.rs | 201 | // If `ZstdFinishOnDrop::drop` failed to write the trailer, | COMMENT |
| LOW | qlog/src/lib.rs | 1 | // Copyright (C) 2019, Cloudflare, Inc. | COMMENT |
| LOW | qlog/src/lib.rs | 21 | // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | COMMENT |
| LOW | qlog/src/lib.rs | 41 | //! https://datatracker.ietf.org/doc/html/draft-ietf-quic-qlog-h3-events.html | COMMENT |
| LOW | qlog/src/lib.rs | 61 | //! data in the [`Event`] array. | COMMENT |
| LOW | qlog/src/lib.rs | 81 | //! | COMMENT |
| LOW | qlog/src/lib.rs | 101 | //! # ); | COMMENT |
| LOW | qlog/src/lib.rs | 121 | //! let raw = qlog::events::RawInfo { | COMMENT |
| LOW | qlog/src/lib.rs | 141 | //! ``` | COMMENT |
| LOW | qlog/src/lib.rs | 161 | //! # ); | COMMENT |
| LOW | qlog/src/lib.rs | 181 | //! "name": "quic:packet_sent", | COMMENT |
| LOW | qlog/src/lib.rs | 201 | //! } | COMMENT |
| LOW | qlog/src/lib.rs | 221 | //! ### Creating a TraceSeq | COMMENT |
| LOW | qlog/src/lib.rs | 241 | //! | COMMENT |
| LOW | qlog/src/lib.rs | 261 | //! # let mut file = std::fs::File::create("foo.sqlog").unwrap(); | COMMENT |
| LOW | qlog/src/lib.rs | 281 | //! | COMMENT |
| LOW | qlog/src/lib.rs | 301 | //! # qlog::streamer::EventTimePrecision::NanoSeconds, | COMMENT |
| LOW | qlog/src/lib.rs | 321 | //! length: None, | COMMENT |
| LOW | qlog/src/lib.rs | 341 | //! | COMMENT |
| LOW | qlog/src/lib.rs | 361 | //! # ); | COMMENT |
| LOW | qlog/src/lib.rs | 381 | //! [`TraceSeq`]: struct.TraceSeq.html | COMMENT |
| LOW | qlog/src/streamer.rs | 1 | // Copyright (C) 2021, Cloudflare, Inc. | COMMENT |
| LOW | qlog/src/streamer.rs | 21 | // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | COMMENT |
| LOW | qlog/src/writer.rs | 1 | // Copyright (C) 2026, Cloudflare, Inc. | COMMENT |
| LOW | qlog/src/writer.rs | 21 | // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | COMMENT |
| LOW | qlog/src/writer.rs | 41 | //! | COMMENT |
| LOW | qlog/src/writer.rs | 61 | use crate::SQLOG_ZST_EXT; | COMMENT |
| LOW | qlog/src/writer.rs | 161 | /// [`make_qlog_writer`]. | COMMENT |
| LOW | qlog/src/reader.rs | 1 | // Copyright (C) 2023, Cloudflare, Inc. | COMMENT |
| LOW | qlog/src/reader.rs | 81 | /// * `*.sqlog.zst` -> zstd via `zstd` (requires the `zstd` feature). | COMMENT |
| LOW | qlog/src/testing/event_tests.rs | 1 | // Copyright (C) 2026, Cloudflare, Inc. | COMMENT |
| LOW | qlog/src/testing/trace_tests.rs | 1 | // Copyright (C) 2026, Cloudflare, Inc. | COMMENT |
| LOW | qlog/src/testing/mod.rs | 1 | // Copyright (C) 2026, Cloudflare, Inc. | COMMENT |
| LOW | qlog/src/events/http3.rs | 1 | // Copyright (C) 2021, Cloudflare, Inc. | COMMENT |
| LOW | qlog/src/events/quic.rs | 1 | // Copyright (C) 2021, Cloudflare, Inc. | COMMENT |
| LOW | qlog/src/events/mod.rs | 1 | // Copyright (C) 2021, Cloudflare, Inc. | COMMENT |
| LOW | qlog/src/events/mod.rs | 61 | pub struct Event { | COMMENT |
| LOW | tools/http3_test/tests/httpbin_tests.rs | 1 | // Copyright (C) 2019, Cloudflare, Inc. | COMMENT |
| LOW | tools/http3_test/src/lib.rs | 1 | // Copyright (C) 2019, Cloudflare, Inc. | COMMENT |
| LOW | tools/http3_test/src/lib.rs | 21 | // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | COMMENT |
| LOW | tools/http3_test/src/lib.rs | 41 | //! | COMMENT |
| LOW | tools/http3_test/src/lib.rs | 61 | //! assert_eq!(status.value(), "200"); | COMMENT |
| LOW | tools/http3_test/src/lib.rs | 81 | //! http3_test::assert_headers!(reqs[0]); | COMMENT |
| LOW | tools/http3_test/src/lib.rs | 101 | //! | COMMENT |
| LOW | tools/http3_test/src/lib.rs | 121 | //! # }; | COMMENT |
| LOW | tools/http3_test/src/lib.rs | 141 | //! | COMMENT |
| LOW | tools/http3_test/src/lib.rs | 161 | //! test.add_response_headers(stream_id, &list); | COMMENT |
| LOW | tools/http3_test/src/lib.rs | 181 | //! in failure, so it is important to store response data and track the number | COMMENT |
| LOW | tools/http3_test/src/lib.rs | 201 | //! match http3_conn.poll(&mut conn) { | COMMENT |
| LOW | tools/http3_test/src/runner.rs | 1 | // Copyright (C) 2019, Cloudflare, Inc. | COMMENT |
| LOW | buffer-pool/src/raw_pool_buf_io.rs | 1 | // Copyright (C) 2025, Cloudflare, Inc. | COMMENT |
| LOW | buffer-pool/src/lib.rs | 1 | // Copyright (C) 2025, Cloudflare, Inc. | COMMENT |
| LOW | buffer-pool/src/buffer.rs | 1 | // Copyright (C) 2025, Cloudflare, Inc. | COMMENT |
| LOW | buffer-pool/src/buffer.rs | 21 | // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | COMMENT |
| LOW | datagram-socket/src/shutdown.rs | 1 | // Copyright (C) 2025, Cloudflare, Inc. | COMMENT |
| LOW | datagram-socket/src/shutdown.rs | 41 | /// the I/O connection has completely shut down. | COMMENT |
| LOW | datagram-socket/src/shutdown.rs | 61 | /// successfully. This typically means that the I/O object is no longer | COMMENT |
| 582 more matches not shown… | ||||
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | quiche/src/lib.rs | 8535 | // TODO: implement stateless retry | COMMENT |
| LOW | quiche/src/ffi.rs | 2174 | // TODO: implement Instant conversion for systems that don't use timespec. | COMMENT |
| LOW | quiche/src/h3/stream.rs | 292 | // TODO: implement push ID. | COMMENT |
| LOW | quiche/src/h3/mod.rs | 3239 | // TODO: implement more checks and PUSH_PROMISE event | COMMENT |
| LOW | quiche/src/h3/mod.rs | 3243 | // TODO: implement CANCEL_PUSH frame | COMMENT |
| LOW | quiche/src/h3/qpack/decoder.rs | 167 | // TODO: implement dynamic table | COMMENT |
| LOW | quiche/src/h3/qpack/decoder.rs | 186 | // TODO: implement dynamic table | COMMENT |
| LOW | quiche/src/h3/qpack/decoder.rs | 230 | // TODO: implement dynamic table | COMMENT |
| LOW | quiche/src/h3/qpack/decoder.rs | 257 | // TODO: implement dynamic table | COMMENT |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | datagram-socket/src/shutdown.rs | 43 | /// # Return value | COMMENT |
| LOW | datagram-socket/src/datagram.rs | 134 | /// # Return value | COMMENT |
| LOW | datagram-socket/src/datagram.rs | 158 | /// # Return value | COMMENT |
| LOW | datagram-socket/src/datagram.rs | 180 | /// # Return value | COMMENT |
| LOW | datagram-socket/src/datagram.rs | 288 | /// # Return value | COMMENT |
| LOW | datagram-socket/src/datagram.rs | 309 | /// # Return value | COMMENT |
| LOW | datagram-socket/src/datagram.rs | 336 | /// # Return value | COMMENT |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| MEDIUM | qlog/src/lib.rs | 66 | //! ### Creating a Trace | COMMENT |
| MEDIUM | qlog/src/lib.rs | 221 | //! ### Creating a TraceSeq | COMMENT |
| MEDIUM | tools/http3_test/src/lib.rs | 34 | //! ## Creating a test | COMMENT |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| MEDIUM | quiche/src/packet.rs | 995 | /// A robust mitigation should skip packets randomly to ensure that an attacker | COMMENT |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | netlog/src/lib.rs | 42 | //! # Example usage | COMMENT |