A modern text/numeric/geo-spatial/vector indexing library for go
This report presents the forensic synthetic code analysis of blevesearch/bleve, a Go project with 11,148 GitHub stars. SynthScan v2.0 examined 168,488 lines of code across 767 source files, recording 704 pattern matches distributed across 5 syntactic categories. The overall adjusted score of 4.2 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).
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 704 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 | query.go | 1 | // Copyright (c) 2014 Couchbase, Inc. | COMMENT |
| LOW | query.go | 21 | ) | COMMENT |
| LOW | query.go | 41 | COMMENT | |
| LOW | query.go | 61 | // Date strings are parsed using the DateTimeParser configured in the | COMMENT |
| LOW | query.go | 81 | // is used. | COMMENT |
| LOW | query.go | 141 | // NewMatchPhraseQuery creates a new Query object | COMMENT |
| LOW | query.go | 181 | // of text terms. | COMMENT |
| LOW | query.go | 261 | // then the query will return documents which contain that IP. | COMMENT |
| LOW | index.go | 1 | // Copyright (c) 2014 Couchbase, Inc. | COMMENT |
| LOW | index.go | 181 | // Index() takes an input value, deduces a DocumentMapping for its type, | COMMENT |
| LOW | index.go | 201 | // Nested fields are identified by prefixing with their parent identifier, | COMMENT |
| LOW | index.go | 221 | // FieldMapping.Analyzer to know how an analyzer is resolved for a given field. | COMMENT |
| LOW | index.go | 301 | return newIndexUsing("", mapping, upsidedown.Name, Config.DefaultMemKVStore, nil) | COMMENT |
| LOW | rescorer_test.go | 1 | // Copyright (c) 2025 Couchbase, Inc. | COMMENT |
| LOW | rescorer_test.go | 381 | func verifyFTSRRFResults(t *testing.T, hits search.DocumentMatchCollection) { | COMMENT |
| LOW | config.go | 1 | // Copyright (c) 2014 Couchbase, Inc. | COMMENT |
| LOW | index_alias_impl.go | 1 | // Copyright (c) 2014 Couchbase, Inc. | COMMENT |
| LOW | index_alias_impl.go | 261 | defer rescorer.restoreSearchRequest() | COMMENT |
| LOW | mapping_vector.go | 1 | // Copyright (c) 2023 Couchbase, Inc. | COMMENT |
| LOW | error.go | 1 | // Copyright (c) 2014 Couchbase, Inc. | COMMENT |
| LOW | search_knn_test.go | 1 | // Copyright (c) 2023 Couchbase, Inc. | COMMENT |
| LOW | examples_test.go | 1 | // Copyright (c) 2014 Couchbase, Inc. | COMMENT |
| LOW | examples_test.go | 461 | fmt.Println(searchResults.Hits[2].ID) | COMMENT |
| LOW | index_test.go | 1 | // Copyright (c) 2014 Couchbase, Inc. | COMMENT |
| LOW | rescorer.go | 1 | // Copyright (c) 2025 Couchbase, Inc. | COMMENT |
| LOW | index_update.go | 1 | // Copyright (c) 2025 Couchbase, Inc. | COMMENT |
| LOW | index_stats.go | 1 | // Copyright (c) 2014 Couchbase, Inc. | COMMENT |
| LOW | search_nested_test.go | 1 | // Copyright (c) 2026 Couchbase, Inc. | COMMENT |
| LOW | rescorer_knn_test.go | 1 | // Copyright (c) 2025 Couchbase, Inc. | COMMENT |
| LOW | rescorer_knn_test.go | 181 | searchRequest.Explain = false | COMMENT |
| LOW | query_bench_test.go | 1 | // Copyright (c) 2022 Couchbase, Inc. | COMMENT |
| LOW | index_update_test.go | 1 | // Copyright (c) 2025 Couchbase, Inc. | COMMENT |
| LOW | search_no_knn.go | 1 | // Copyright (c) 2023 Couchbase, Inc. | COMMENT |
| LOW | search_no_knn.go | 41 | // Fields describes a list of field values which | COMMENT |
| LOW | search.go | 1 | // Copyright (c) 2014 Couchbase, Inc. | COMMENT |
| LOW | search.go | 521 | } | COMMENT |
| LOW | search_test.go | 1 | // Copyright (c) 2014 Couchbase, Inc. | COMMENT |
| LOW | config_app.go | 1 | // Copyright (c) 2014 Couchbase, Inc. | COMMENT |
| LOW | index_impl.go | 1 | // Copyright (c) 2014 Couchbase, Inc. | COMMENT |
| LOW | index_alias_impl_test.go | 1 | // Copyright (c) 2014 Couchbase, Inc. | COMMENT |
| LOW | doc.go | 1 | // Copyright (c) 2014 Couchbase, Inc. | COMMENT |
| LOW | search_knn.go | 1 | // Copyright (c) 2023 Couchbase, Inc. | COMMENT |
| LOW | index_meta.go | 1 | // Copyright (c) 2014 Couchbase, Inc. | COMMENT |
| LOW | config_disk.go | 1 | // Copyright (c) 2014 Couchbase, Inc. | COMMENT |
| LOW | builder.go | 1 | // Copyright (c) 2019 Couchbase, Inc. | COMMENT |
| LOW | index_alias.go | 1 | // Copyright (c) 2014 Couchbase, Inc. | COMMENT |
| LOW | index_alias.go | 21 | // operations are valid and will be passed through | COMMENT |
| LOW | builder_test.go | 1 | // Copyright (c) 2019 Couchbase, Inc. | COMMENT |
| LOW | mapping.go | 1 | // Copyright (c) 2014 Couchbase, Inc. | COMMENT |
| LOW | index_meta_test.go | 1 | // Copyright (c) 2014 Couchbase, Inc. | COMMENT |
| LOW | pre_search.go | 1 | // Copyright (c) 2024 Couchbase, Inc. | COMMENT |
| LOW | fusion/util.go | 1 | // Copyright (c) 2025 Couchbase, Inc. | COMMENT |
| LOW | fusion/fusion.go | 1 | // Copyright (c) 2025 Couchbase, Inc. | COMMENT |
| LOW | fusion/rrf.go | 1 | // Copyright (c) 2025 Couchbase, Inc. | COMMENT |
| LOW | fusion/rsf.go | 1 | // Copyright (c) 2025 Couchbase, Inc. | COMMENT |
| LOW | fusion/rrf_test.go | 1 | // Copyright (c) 2025 Couchbase, Inc. | COMMENT |
| LOW | fusion/rsf_test.go | 1 | // Copyright (c) 2025 Couchbase, Inc. | COMMENT |
| LOW | mapping/mapping_test.go | 1 | // Copyright (c) 2014 Couchbase, Inc. | COMMENT |
| LOW | mapping/index.go | 1 | // Copyright (c) 2014 Couchbase, Inc. | COMMENT |
| LOW | mapping/index.go | 101 | return nil | COMMENT |
| 617 more matches not shown… | ||||
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW⚡ | search_test.go | 3485 | "text": "lorem ipsum dolor sit amet consectetur adipiscing elit do eiusmod tempor", | CODE |
| LOW⚡ | search_test.go | 3485 | "text": "lorem ipsum dolor sit amet consectetur adipiscing elit do eiusmod tempor", | CODE |
| LOW⚡ | search_test.go | 3494 | "text": "lorem ipsum sit amet adipiscing elit do eiusmod", | CODE |
| LOW | docs/create_and_search_your_first_index.md | 105 | "author": "John Doe", | CODE |
| LOW | docs/sort_facet.md | 62 | "match": "lorem ipsum", | CODE |
| LOW | docs/sort_facet.md | 79 | "match": "lorem ipsum", | CODE |
| LOW | docs/sort_facet.md | 102 | "match": "lorem ipsum", | CODE |
| LOW | docs/sort_facet.md | 124 | "match": "lorem ipsum", | CODE |
| LOW | docs/sort_facet.md | 150 | "match": "lorem ipsum", | CODE |
| LOW | docs/sort_facet.md | 204 | "match": "lorem ipsum", | CODE |
| LOW | docs/sort_facet.md | 221 | "match": "lorem ipsum", | CODE |
| LOW | docs/sort_facet.md | 252 | "match": "lorem ipsum", | CODE |
| LOW | docs/sort_facet.md | 282 | "match": "lorem ipsum", | CODE |
| LOW | docs/sort_facet.md | 322 | "match": "lorem ipsum", | CODE |
| LOW | docs/sort_facet.md | 362 | "match": "lorem ipsum", | CODE |
| LOW | docs/hierarchy.md | 14 | "name": "John Doe", | CODE |
| LOW | docs/hierarchy.md | 18 | "street": "123 Main St", | CODE |
| LOW | docs/hierarchy.md | 64 | {"type": "mobile", "number": "555-1234"}, | CODE |
| LOW | docs/hierarchy.md | 65 | {"type": "home", "number": "555-5678"} | CODE |
| LOW | …ighlight/highlighter/simple/highlighter_simple_test.go | 71 | fieldBytes := []byte(`Lorem ipsum dolor sit amet, consectetur adipiscing elit. Mauris sed semper nulla, sed pellentesqu | CODE |
| LOW | …ighlight/highlighter/simple/highlighter_simple_test.go | 71 | fieldBytes := []byte(`Lorem ipsum dolor sit amet, consectetur adipiscing elit. Mauris sed semper nulla, sed pellentesqu | CODE |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | docs/search_autocomplete.md | 180 | ### Step 1: Create Custom Edge N-gram Token Filter | COMMENT |
| LOW | docs/search_autocomplete.md | 209 | ### Step 2: Create Custom Analyzer | COMMENT |
| LOW | docs/search_autocomplete.md | 267 | ### Step 3: Configure Field Mapping | COMMENT |
| LOW | docs/search_autocomplete.md | 285 | ### Step 4: How It Works in Real Search | COMMENT |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| MEDIUM | data/test/sample-data.json | 6 | ,{"title":"Edinburgh/South","name":"Argyle Backpackers","address":"14 Argyle Pl","directions":"The number 41 bus (catch | CODE |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | search_knn.go | 560 | // since the stack is not empty, we need to check if the top of the stack | COMMENT |