A cloud native embedded storage engine built on object storage.
This report presents the forensic synthetic code analysis of slatedb/slatedb, a Rust project with 3,206 GitHub stars. SynthScan v2.0 examined 201,484 lines of code across 335 source files, recording 716 pattern matches distributed across 10 syntactic categories. The overall adjusted score of 4.5 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 716 distinct pattern matches across 10 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 | slatedb-common/src/clock.rs | 1 | //! This module contains utility methods and structs for handling time. | COMMENT |
| LOW | slatedb-common/src/clock.rs | 81 | COMMENT | |
| LOW | slatedb-common/src/lib.rs | 1 | //! Common utilities shared across SlateDB crates. | COMMENT |
| LOW | slatedb-common/src/metrics.rs | 1 | //! # Metrics Module | COMMENT |
| LOW | slatedb-common/src/metrics.rs | 21 | // --------------------------------------------------------------------------- | COMMENT |
| LOW | slatedb-common/src/metrics.rs | 41 | COMMENT | |
| LOW | slatedb-common/src/metrics.rs | 61 | COMMENT | |
| LOW | slatedb-common/src/metrics.rs | 81 | /// - `name` – Dotted metric name. | COMMENT |
| LOW | slatedb-common/src/metrics.rs | 141 | /// Controls which metrics are active. Metrics with a level below the configured | COMMENT |
| LOW | slatedb-common/src/rand.rs | 21 | pub(crate) type RngAlg = Xoroshiro128PlusPlus; | COMMENT |
| LOW | slatedb-common/src/utils.rs | 1 | use crate::clock::SystemClock; | COMMENT |
| LOW | slatedb-txn-obj/src/lib.rs | 1 | //! # SlateDB Transactional Object | COMMENT |
| LOW | slatedb-txn-obj/src/lib.rs | 21 | //! monotonically increasing IDs. This is useful if it's important to observe earlier versions of | COMMENT |
| LOW | slatedb-txn-obj/src/lib.rs | 41 | //! ## Error semantics | COMMENT |
| LOW | slatedb-txn-obj/src/lib.rs | 261 | /// corresponding `update` or `refresh` fails with`Fenced`. | COMMENT |
| LOW | slatedb-txn-obj/src/lib.rs | 321 | }) | COMMENT |
| LOW | slatedb-txn-obj/src/lib.rs | 341 | /// - `get_epoch`: Extracts the epoch from the object value. | COMMENT |
| LOW | slatedb-txn-obj/src/lib.rs | 581 | /// [`TransactionalObjectError::ObjectVersionExists`] as a failed write if the just-created ID is | COMMENT |
| LOW | slatedb-txn-obj/src/lib.rs | 601 | /// | COMMENT |
| LOW | slatedb-txn-obj/src/lib.rs | 641 | /// List stored object versions in ascending ID order over the supplied ID bounds. | COMMENT |
| LOW | slatedb-txn-obj/src/object_store.rs | 101 | /// | COMMENT |
| LOW | slatedb-txn-obj/src/object_store.rs | 121 | object_store, | COMMENT |
| LOW | slatedb-txn-obj/src/object_store.rs | 201 | // a write that occurred before a boundary file exists is valid even if | COMMENT |
| LOW | slatedb-cli/src/args.rs | 81 | CreateCheckpoint { | COMMENT |
| LOW | slatedb-cli/src/args.rs | 101 | #[arg(short, long)] | COMMENT |
| LOW | slatedb-cli/src/args.rs | 141 | /// `ldb scan`. | COMMENT |
| LOW | slatedb-cli/src/args.rs | 161 | COMMENT | |
| LOW | slatedb-cli/src/args.rs | 181 | /// manifest. This provides a point-in-time view protected from garbage collection. | COMMENT |
| LOW | slatedb-cli/src/args.rs | 201 | #[arg(long, default_value_t = false)] | COMMENT |
| LOW | slatedb-cli/src/args.rs | 241 | ArgGroup::new("compaction_request") | COMMENT |
| LOW | slatedb-cli/src/args.rs | 261 | /// ```json | COMMENT |
| LOW | slatedb-cli/src/args.rs | 281 | .multiple(true) | COMMENT |
| LOW | slatedb-cli/src/args.rs | 301 | /// minimum WAL fence age that should be considered for collection and | COMMENT |
| LOW | slatedb-dst/tests/segments.rs | 1 | //! Verifies deterministic scenario-test behavior for RFC-0024 segmented | COMMENT |
| LOW | slatedb-dst/tests/determinism.rs | 1 | //! Verifies deterministic scenario-test behavior for SlateDB under DST | COMMENT |
| LOW | slatedb-dst/tests/rescaling.rs | 1 | //! Verifies that RFC-0004 projection and union preserve database contents under | COMMENT |
| LOW | slatedb-dst/tests/rescaling.rs | 21 | //! keeps every point operation, write batch, and prefix scan inside one child. | COMMENT |
| LOW | slatedb-dst/src/deterministic_local_filesystem.rs | 181 | } | COMMENT |
| LOW | slatedb-dst/src/rescaling.rs | 1 | //! Data-preservation checks for RFC-0004 split and merge scenarios. | COMMENT |
| LOW | slatedb-dst/src/rescaling.rs | 21 | //! operations, write batches, and scans stay within one child. The child | COMMENT |
| LOW | slatedb-dst/src/scenarios.rs | 1 | //! Shared structures and execution logic for running DST scenarios. | COMMENT |
| LOW | slatedb-dst/src/scenarios.rs | 41 | use crate::{DeterministicLocalFilesystem, Harness}; | COMMENT |
| LOW | slatedb-dst/src/scenarios.rs | 61 | /// Mock-clock deadline (ms since the unix epoch) at which the | COMMENT |
| LOW | slatedb-dst/src/harness.rs | 81 | /// This exposes the database path, object stores, clock, failpoint | COMMENT |
| LOW | slatedb-dst/src/harness.rs | 121 | /// | COMMENT |
| LOW | slatedb-dst/src/harness.rs | 161 | COMMENT | |
| LOW | slatedb-dst/src/harness.rs | 181 | self.shared.startup_ctx.merge_operator() | COMMENT |
| LOW | slatedb-dst/src/harness.rs | 261 | /// Returns the shared failpoint registry for the harness run. | COMMENT |
| LOW | slatedb-dst/src/harness.rs | 281 | COMMENT | |
| LOW | slatedb-dst/src/harness.rs | 401 | /// | COMMENT |
| LOW | slatedb-dst/src/harness.rs | 441 | self | COMMENT |
| LOW | slatedb-dst/src/harness.rs | 461 | /// clock-wrapped object stores. | COMMENT |
| LOW | slatedb-dst/src/harness.rs | 501 | /// ## Returns | COMMENT |
| LOW | slatedb-dst/src/harness.rs | 521 | COMMENT | |
| LOW | slatedb-dst/src/harness.rs | 541 | COMMENT | |
| LOW | slatedb-dst/src/harness.rs | 601 | runtime.block_on(self.run_async()) | COMMENT |
| LOW | slatedb-dst/src/prefix_extractor.rs | 1 | //! Deterministic prefix extractors for DST scenarios. | COMMENT |
| LOW | slatedb-dst/src/utils.rs | 161 | } | COMMENT |
| LOW | slatedb-dst/src/actors/compactor.rs | 41 | }) | COMMENT |
| LOW | slatedb-dst/src/actors/mod.rs | 1 | //! Reusable deterministic workload actors for DST scenarios. | COMMENT |
| 555 more matches not shown… | ||||
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| CRITICAL | slatedb/src/checkpoint.rs | 357 | assert_eq!(latest_manifest.manifest.core.tree.l0.len(), 1); | CODE |
| CRITICAL | slatedb/src/db.rs | 2315 | assert!(!manifest.manifest.core.tree.l0.is_empty()); | CODE |
| CRITICAL | slatedb/src/db.rs | 2338 | assert!(!manifest.manifest.core.tree.compacted.is_empty()); | CODE |
| CRITICAL | slatedb/src/db.rs | 3554 | assert_eq!(1, state.state.manifest.value.core.tree.l0.len()); | CODE |
| CRITICAL | slatedb/src/db.rs | 3555 | let view = state.state.manifest.value.core.tree.l0.front().unwrap(); | CODE |
| CRITICAL | slatedb/src/db.rs | 6037 | manifest.manifest.core.tree.l0.len(), | CODE |
| CRITICAL | slatedb/src/db.rs | 6038 | manifest.manifest.core.tree.compacted.len() | CODE |
| CRITICAL | slatedb/src/db.rs | 6063 | manifest.manifest.core.tree.l0.len(), | CODE |
| CRITICAL | slatedb/src/db.rs | 6064 | manifest.manifest.core.tree.compacted.len() | CODE |
| CRITICAL | slatedb/src/db.rs | 6078 | manifest.manifest.core.tree.l0.len(), | CODE |
| CRITICAL | slatedb/src/db.rs | 6079 | manifest.manifest.core.tree.compacted.len() | CODE |
| CRITICAL | slatedb/src/db.rs | 7841 | manifest.manifest.core.tree.l0.len(), | CODE |
| CRITICAL | slatedb/src/db.rs | 8669 | s.current_manifest.manifest.core.checkpoints.len() > initial_checkpoint_count | CODE |
| CRITICAL | slatedb/src/db.rs | 8677 | status.current_manifest.manifest.core.checkpoints.len(), | CODE |
| CRITICAL | slatedb/src/db.rs | 10078 | .modify(|m| m.state.manifest.value.core.segments.clear()); | CODE |
| CRITICAL | slatedb/src/clone.rs | 1222 | !manifest.manifest.core.tree.l0.is_empty(), | CODE |
| CRITICAL | slatedb/src/clone.rs | 1313 | !manifest.manifest.core.tree.l0.is_empty(), | CODE |
| CRITICAL | slatedb/src/garbage_collector.rs | 1482 | assert_eq!(current_manifest.manifest.core.tree.l0.len(), 2); | CODE |
| CRITICAL | slatedb/src/garbage_collector.rs | 1483 | assert_eq!(current_manifest.manifest.core.tree.compacted.len(), 1); | CODE |
| CRITICAL | slatedb/src/garbage_collector.rs | 1519 | assert_eq!(current_manifest.manifest.core.tree.l0.len(), 2); | CODE |
| CRITICAL | slatedb/src/garbage_collector.rs | 1520 | assert_eq!(current_manifest.manifest.core.tree.compacted.len(), 1); | CODE |
| CRITICAL | slatedb/src/sst_reader.rs | 320 | !manifest.manifest.core.tree.l0.is_empty(), | CODE |
| CRITICAL | slatedb/src/memtable_flusher/tracker.rs | 1315 | modifier.state.manifest.value.core.segments.clear(); | CODE |
| CRITICAL | …rc/test/java/io/slatedb/uniffi/SlateDbLoggingTest.java | 59 | org.junit.jupiter.api.Assertions.assertFalse(condition); | CODE |
| CRITICAL | …/test/java/io/slatedb/uniffi/SlateDbWalReaderTest.java | 143 | org.junit.jupiter.api.Assertions.assertFalse(condition); | CODE |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | bindings/python/tests/test_reader.py | 50 | async def test_reader_build_fails_when_database_is_missing() -> None: | CODE |
| LOW | bindings/python/tests/test_reader.py | 75 | async def test_reader_scan_variants() -> None: | CODE |
| LOW | bindings/python/tests/test_reader.py | 177 | async def test_reader_refresh_polling_updates_visible_state() -> None: | CODE |
| LOW | bindings/python/tests/test_reader.py | 198 | async def test_reader_default_mode_replays_new_wal_data() -> None: | CODE |
| LOW | bindings/python/tests/test_reader.py | 216 | async def test_reader_skip_wal_replay_ignores_wal_only_data() -> None: | CODE |
| LOW | bindings/python/tests/test_reader.py | 243 | async def test_reader_merge_operator() -> None: | CODE |
| LOW | bindings/python/tests/test_reader.py | 262 | async def test_reader_builder_validation_and_errors() -> None: | CODE |
| LOW | bindings/python/tests/test_reader.py | 293 | async def test_reader_invalid_ranges_raise_invalid_errors() -> None: | CODE |
| LOW | bindings/python/tests/test_admin.py | 28 | async def test_admin_builder_accepts_configuration_and_is_single_use() -> None: | CODE |
| LOW | bindings/python/tests/test_admin.py | 61 | async def test_admin_manifest_read_list_and_state_view() -> None: | CODE |
| LOW | bindings/python/tests/test_admin.py | 102 | async def test_admin_compaction_queries_handle_empty_store_and_invalid_ids() -> None: | CODE |
| LOW | bindings/python/tests/test_admin.py | 123 | async def test_admin_run_gc_once_accepts_default_and_custom_options() -> None: | CODE |
| LOW | bindings/python/tests/test_admin.py | 154 | async def test_admin_checkpoint_listing_tracks_reader_lifecycle() -> None: | CODE |
| LOW | bindings/python/tests/test_admin.py | 192 | async def test_admin_sequence_lookups_use_persisted_tracker() -> None: | CODE |
| LOW | bindings/python/tests/test_admin.py | 248 | async def test_admin_create_detached_checkpoint_without_options() -> None: | CODE |
| LOW | bindings/python/tests/test_admin.py | 273 | async def test_admin_create_detached_checkpoint_with_lifetime() -> None: | CODE |
| LOW | bindings/python/tests/test_admin.py | 302 | async def test_admin_create_detached_checkpoint_with_name() -> None: | CODE |
| LOW | bindings/python/tests/test_admin.py | 332 | async def test_admin_create_detached_checkpoint_from_source() -> None: | CODE |
| LOW | bindings/python/tests/test_admin.py | 358 | async def test_admin_refresh_checkpoint_updates_lifetime() -> None: | CODE |
| LOW | bindings/python/tests/test_admin.py | 392 | async def test_admin_refresh_checkpoint_without_lifetime() -> None: | CODE |
| LOW | bindings/python/tests/test_admin.py | 412 | async def test_admin_refresh_checkpoint_with_invalid_id_fails() -> None: | CODE |
| LOW | bindings/python/tests/test_admin.py | 427 | async def test_admin_delete_checkpoint_removes_checkpoint() -> None: | CODE |
| LOW | bindings/python/tests/test_admin.py | 452 | async def test_admin_delete_checkpoint_with_invalid_id_fails() -> None: | CODE |
| LOW | bindings/python/tests/test_admin.py | 467 | async def test_admin_delete_multiple_checkpoints() -> None: | CODE |
| LOW | bindings/python/tests/test_logging.py | 10 | async def test_logging_callback_delivery_and_duplicate_init_rejection() -> None: | CODE |
| LOW | bindings/python/tests/test_metrics.py | 115 | async def test_default_metrics_recorder_snapshot_and_lookups() -> None: | CODE |
| LOW | bindings/python/tests/test_metrics.py | 144 | async def test_db_builder_accepts_custom_metrics_recorder() -> None: | CODE |
| LOW | bindings/python/tests/test_metrics.py | 159 | async def test_reader_builder_accepts_default_metrics_recorder() -> None: | CODE |
| LOW | bindings/python/tests/test_db.py | 32 | async def test_db_lifecycle_and_status() -> None: | CODE |
| LOW | bindings/python/tests/test_db.py | 55 | async def test_db_status_segments_without_extractor() -> None: | CODE |
| LOW | bindings/python/tests/test_db.py | 65 | async def test_db_status_segments_with_extractor() -> None: | CODE |
| LOW | bindings/python/tests/test_db.py | 94 | async def test_db_crud_and_metadata() -> None: | CODE |
| LOW | bindings/python/tests/test_db.py | 240 | async def test_db_batch_write_and_consumption() -> None: | CODE |
| LOW | bindings/python/tests/test_db.py | 277 | async def test_db_merge_and_merge_with_options() -> None: | CODE |
| LOW | bindings/python/tests/test_db.py | 298 | async def test_db_snapshot_isolation() -> None: | CODE |
| LOW | bindings/python/tests/test_db.py | 335 | async def test_db_invalid_inputs_map_to_typed_errors() -> None: | CODE |
| LOW | bindings/python/tests/test_db.py | 378 | async def test_db_writer_fencing_reports_closed_reason() -> None: | CODE |
| LOW | bindings/python/tests/test_wal_reader.py | 16 | async def test_wal_reader_empty_store_listing() -> None: | CODE |
| LOW | bindings/python/tests/test_wal_reader.py | 22 | async def test_wal_reader_listing_bounds_and_navigation() -> None: | CODE |
| LOW | bindings/python/tests/test_wal_reader.py | 47 | async def test_wal_reader_metadata_and_row_decoding() -> None: | CODE |
| LOW | bindings/python/tests/test_wal_reader.py | 80 | async def test_wal_reader_missing_file_metadata_failure() -> None: | CODE |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW⚡ | slatedb/src/transaction_manager.rs | 955 | // Step 1: Create a transaction | COMMENT |
| LOW⚡ | slatedb/src/transaction_manager.rs | 959 | // Step 2: Simulate conflict detection during transaction | COMMENT |
| LOW⚡ | slatedb/src/transaction_manager.rs | 965 | // Step 3: Create another transaction that will commit first | COMMENT |
| LOW⚡ | slatedb/src/transaction_manager.rs | 969 | // Step 4: Commit the other transaction | COMMENT |
| LOW⚡ | slatedb/src/transaction_manager.rs | 973 | // Step 5: Check for conflicts again - should detect conflict on key1 | COMMENT |
| LOW⚡ | slatedb/src/transaction_manager.rs | 977 | // Step 6: Commit our transaction despite conflict (simulating retry logic) | COMMENT |
| LOW⚡ | slatedb/src/transaction_manager.rs | 981 | // Step 7: Verify final state | COMMENT |
| LOW⚡ | slatedb/src/transaction_manager.rs | 985 | // Step 8: Verify min_active_seq is now None | COMMENT |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW⚡ | slatedb/src/transaction_manager.rs | 955 | // Step 1: Create a transaction | COMMENT |
| LOW⚡ | slatedb/src/transaction_manager.rs | 959 | // Step 2: Simulate conflict detection during transaction | COMMENT |
| LOW⚡ | slatedb/src/transaction_manager.rs | 965 | // Step 3: Create another transaction that will commit first | COMMENT |
| LOW⚡ | slatedb/src/transaction_manager.rs | 969 | // Step 4: Commit the other transaction | COMMENT |
| LOW⚡ | slatedb/src/transaction_manager.rs | 973 | // Step 5: Check for conflicts again - should detect conflict on key1 | COMMENT |
| LOW⚡ | slatedb/src/transaction_manager.rs | 977 | // Step 6: Commit our transaction despite conflict (simulating retry logic) | COMMENT |
| LOW⚡ | slatedb/src/transaction_manager.rs | 981 | // Step 7: Verify final state | COMMENT |
| LOW⚡ | slatedb/src/transaction_manager.rs | 985 | // Step 8: Verify min_active_seq is now None | COMMENT |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| MEDIUM | slatedb-dst/Cargo.toml | 14 | # Disable `libtest` harness because it fights with Criterion's `--output-format bencher` | COMMENT |
| MEDIUM | website/package-lock.json | 6953 | "resolved": "https://registry.npmjs.org/robust-predicates/-/robust-predicates-3.0.2.tgz", | CODE |
| MEDIUM | slatedb/Cargo.toml | 136 | # Disable `libtest` harness because it fights with Criterion's `--output-format bencher` | COMMENT |
| MEDIUM | slatedb/src/partitioned_keyspace.rs | 190 | // we could do something more robust here, but its fine since the test cases are | COMMENT |
| MEDIUM | slatedb-bencher/Cargo.toml | 15 | # Disable `libtest` harness because it fights with Criterion's `--output-format bencher` | COMMENT |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | bindings/python/tests/test_reader.py | 1 | CODE | |
| LOW | bindings/python/tests/test_admin.py | 1 | CODE | |
| LOW | bindings/python/tests/conftest.py | 1 | CODE | |
| LOW | bindings/python/tests/test_logging.py | 1 | CODE | |
| LOW | bindings/python/tests/test_metrics.py | 1 | CODE | |
| LOW | bindings/python/tests/test_db.py | 1 | CODE | |
| LOW | bindings/python/tests/test_wal_reader.py | 1 | CODE | |
| LOW | bindings/python/slatedb/uniffi/__init__.py | 6 | CODE |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | slatedb-bencher/benchmark-db.sh | 208 | # Set CLOUD_PROVIDER to local if not already set | COMMENT |
| LOW | slatedb-bencher/benchmark-transaction.sh | 48 | # Set RUST_LOG to INFO level to prevent gigabyte-sized log files | COMMENT |
| LOW | slatedb-bencher/benchmark-transaction.sh | 264 | # Set CLOUD_PROVIDER to local if not already set | COMMENT |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| MEDIUM | rfcs/0024-segment-oriented-compaction.md | 660 | - **Composition with projection/union.** [Projection and union](./0004-checkpoints.md#manifest-projection-and-union) ope | CODE |
| MEDIUM | rfcs/0019-change-data-capture.md | 420 | - Githb issue [#249](https://github.com/slatedb/slatedb/issues/249) (CDC Streaming to support data sinks and event drive | CODE |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | bindings/python/tests/conftest.py | 169 | except Exception as error: # pragma: no cover - helper for polling assertions | CODE |