Code Duplication¶

Find duplicate and misplaced functions, then consolidate them automatically.

Code Duplication Detector scans source files to find semantically related functions that live in different files, duplicate implementations of the same logic, and functions that belong in a different module. Chain it to Create PR from Issue for a fully autonomous detect-and-fix loop. Most runs end with noop.

Quick install¶

Detector only¶

Install the detector alone if you want to review refactoring recommendations before acting.

mkdir -p .github/workflows && curl -fsSL \
  https://raw.githubusercontent.com/elastic/ai-github-actions/v0/gh-agent-workflows/code-duplication-detector/example.yml \
  -o .github/workflows/code-duplication-detector.yml

Chained (detector + fixer)¶

Install the chained example for autonomous detection and consolidation.

mkdir -p .github/workflows && curl -fsSL \
  https://raw.githubusercontent.com/elastic/ai-github-actions/v0/gh-agent-workflows/code-duplication-detector/example-chained.yml \
  -o .github/workflows/code-duplication-detect-and-fix.yml

Code Duplication Detector¶

Scans source files (by language or custom glob) to find semantically related functions in different files, duplicate implementations, and functions that belong in a different module. Files a report with specific refactoring recommendations.

Trigger¶

Event	Schedule
`schedule`	Weekdays
`workflow_dispatch`	Manual

Inputs¶

Input	Description	Default
`languages`	Comma-separated languages to analyze (ignored if `file-globs` is set)	`"go"`
`file-globs`	Comma-separated file globs to analyze (overrides `languages`)	`""`
`additional-instructions`	Repo-specific instructions appended to the agent prompt	`""`
`setup-commands`	Shell commands run before the agent starts	`""`

Safe outputs¶

create-issue — file a refactoring report (max 1, auto-closes older reports)

Example workflow¶

name: Code Duplication Detector
on:
  schedule:
    - cron: "0 12 * * 1-5"
  workflow_dispatch:

permissions:
  contents: read
  issues: write
  pull-requests: read

jobs:
  run:
    uses: elastic/ai-github-actions/.github/workflows/gh-aw-code-duplication-detector.lock.yml@v0
    with:
      languages: "go,python,typescript"
    secrets:
      COPILOT_GITHUB_TOKEN: ${{ secrets.COPILOT_GITHUB_TOKEN }}