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feat(enrichment): near-verbatim duplication scan analyzer #1867

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JSONbored merged 2 commits into from
Jun 30, 2026
Merged

feat(enrichment): near-verbatim duplication scan analyzer #1867

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5304a68
feat(enrichment): add near-verbatim duplication scan analyzer for rev…
GildardoDev Jun 30, 2026
cdcff93
Merge branch 'main' into feat/duplication-scan
GildardoDev Jun 30, 2026
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6 changes: 3 additions & 3 deletions .env.example
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Original file line number Diff line number Diff line change
Expand Up @@ -65,17 +65,17 @@ GITTENSORY_REVIEW_ENRICHMENT=false
# Current analyzer names:
# dependency,lockfileDrift,secret,license,installScript,heavyDependency,actionPin,eol,redos
# provenance,codeowners,secretLog,assetWeight,typosquat,commitSignature,iacMisconfig,nativeBuild
# history,docCommentDrift
# history,docCommentDrift,duplication
#
# Profile defaults:
# fast: dependency,lockfileDrift,secret,license,installScript,heavyDependency,actionPin,eol
# redos,provenance,secretLog,typosquat,iacMisconfig,nativeBuild
# balanced (default): dependency,lockfileDrift,secret,license,installScript,heavyDependency
# actionPin,eol,redos,provenance,codeowners,secretLog,assetWeight,typosquat,commitSignature
# iacMisconfig,nativeBuild,history,docCommentDrift
# iacMisconfig,nativeBuild,history,docCommentDrift,duplication
# deep: dependency,lockfileDrift,secret,license,installScript,heavyDependency,actionPin,eol
# redos,provenance,codeowners,secretLog,assetWeight,typosquat,commitSignature,iacMisconfig
# nativeBuild,history,docCommentDrift
# nativeBuild,history,docCommentDrift,duplication
# END GENERATED REES ANALYZERS

# Submitter-reputation spend control (internal-only): downgrades new/burst/low-rep
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28 changes: 28 additions & 0 deletions apps/gittensory-ui/src/lib/rees-analyzers.ts
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Expand Up @@ -505,6 +505,34 @@ export const REES_ANALYZERS = [
"Conservative: only named function declarations with confidently-enumerable params; non-parameter signature edits are not reported.",
},
},
{
name: "duplication",
title: "Near-verbatim duplicated code",
category: "quality",
cost: "github-light",
defaultEnabled: true,
profiles: ["balanced", "deep"],
requires: ["files", "github-token", "head-sha"],
limits: {
minRun: 8,
maxCandidates: 40,
maxFetches: 30,
maxFindings: 25,
maxFileBytes: 500000,
},
docs: {
summary:
"Flags added code that is a near-verbatim duplicate of a block already present elsewhere in the repo.",
looksAt:
"Added diff hunks in changed source files compared against same-extension repo files fetched from the git tree at headSha.",
reports:
"The head file:line, the existing source file:line it duplicates, and the matched line count.",
network:
"Calls the GitHub API for the git tree and candidate blobs. Requires headSha and token forwarding for private repos.",
notes:
"Conservative: trivial/boilerplate lines are dropped and a long contiguous run is required, so incidental overlap is not flagged. Never returns code content.",
},
},
] as const satisfies readonly ReesAnalyzerDoc[];

export const REES_ANALYZER_NAMES = REES_ANALYZERS.map((analyzer) => analyzer.name);
30 changes: 30 additions & 0 deletions review-enrichment/analyzer-metadata.json
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Expand Up @@ -579,6 +579,36 @@
"network": "Calls the GitHub API for changed file contents. Requires headSha and token forwarding for private repos.",
"notes": "Conservative: only named function declarations with confidently-enumerable params; non-parameter signature edits are not reported."
}
},
{
"name": "duplication",
"title": "Near-verbatim duplicated code",
"category": "quality",
"cost": "github-light",
"defaultEnabled": true,
"profiles": [
"balanced",
"deep"
],
"requires": [
"files",
"github-token",
"head-sha"
],
"limits": {
"minRun": 8,
"maxCandidates": 40,
"maxFetches": 30,
"maxFindings": 25,
"maxFileBytes": 500000
},
"docs": {
"summary": "Flags added code that is a near-verbatim duplicate of a block already present elsewhere in the repo.",
"looksAt": "Added diff hunks in changed source files compared against same-extension repo files fetched from the git tree at headSha.",
"reports": "The head file:line, the existing source file:line it duplicates, and the matched line count.",
"network": "Calls the GitHub API for the git tree and candidate blobs. Requires headSha and token forwarding for private repos.",
"notes": "Conservative: trivial/boilerplate lines are dropped and a long contiguous run is required, so incidental overlap is not flagged. Never returns code content."
}
}
]
}
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