Marcos Silva
53 lines
1.5 KiB
Markdown
53 lines
1.5 KiB
Markdown
---
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name: duplicate-code-check
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description: >-
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Find and report code duplication introduced by a merge request.
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Use when asked to check for duplicates, repeated logic, or copy-paste code
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in a branch or MR diff.
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---
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# Duplicate Code Check
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Scans the diff of a branch or merge request for duplicated logic and produces a structured report with locations, severity and suggested actions. Does not remove any code without explicit user approval.
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## Input
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User should provide:
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- branch name where duplication check should be done
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- target branch name to compare
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## Steps
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1. Fetch the diff for the branch or MR
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2. Scan the diff for duplicate blocks. Use criteria:
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- identical or near-identical method bodies (more than 10 lines);
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- copy-pasted conditional blocks or switch/case arms;
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- repeated string literals or constants that could be extracted;
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- utility functions that already exist elsewhere in the codebase.
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3. Ask the user before suggesting any removal
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4. Write the report.
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## Output format
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Create the file `duplication-check-<branch name>.md` with the table with next columns:
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- all duplications
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- risk level of removing each code duplication
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- user decision is necessary.
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## Rules
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- Always check that safe delete is being suggested and there are no usages of removed code.
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- Always ask before removing any code duplication.
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## Passing criteria
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The skill is complete only if:
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- all files in the diff were scanned;
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- no code was modified without explicit user approval;
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- the report is written to `duplication-check-<branch name>.md` file. |