PR Labeler Action 🏷️

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• Smart deduplication — Won't add labels that already exist on the PR
• CI/CD ready — Works on pull_request and pull_request_target events
• Lightweight — Pure Python, no Docker image to pull
• JSON support — Can also use .json config format

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• 'src/styles/**'
• 'src/pages/**'

backend:

• 'src/api/**'
• 'src/models/**'
• 'src/services/**'

documentation:

• 'docs/**'
• '*.md'
• '**/*.md'

dependencies:

• 'package.json'
• 'package-lock.json'
• 'requirements.txt'
• '**/go.mod'

infrastructure:

• 'Dockerfile'
• 'docker-compose.yml'
• '.github/**'
• 'k8s/**'

---

types: [opened, synchronize, reopened]

permissions:
contents: read
pull-requests: write

jobs:
label:
runs-on: ubuntu-latest
steps:
- uses: SCL339/pr-labeler-action@v1.0.0
with:
github-token: ${{ secrets.GITHUB_TOKEN }}

---

|-------|-------------|----------|---------| | github-token | GitHub token with label write access | No | ${{ github.token }} | | config-path | Path to label config file in the repo | No | .github/pr-labeler.yml | | fail-on-missing-config | Fail if config file is missing | No | false |

---

• 'another/pattern/**'

---

{
"frontend": ["src/components/**", "src/styles/**"],
"backend": ["src/api/**", "src/models/**"]
}

---

| ** | Any sequence of characters (including /) | | ? | Any single character (except /) | | [abc] | Any character in the set |

---

tests:

• 'tests/**' # Any file under tests/
• '**/test_*.py' # Any test Python file anywhere
• 'src//tests/' # Nested test directories

python:

• '**/*.py' # Any Python file anywhere

config:

• '*.yml' # YAML files in root
• 'config/**' # Everything under config/
• '.env*' # .env, .env.example, etc.

---

on: [pull_request]
permissions:
contents: read
pull-requests: write
jobs:
label:
runs-on: ubuntu-latest
steps:
- uses: SCL339/pr-labeler-action@v1.0.0

---

• uses: SCL339/pr-labeler-action@v1.0.0 with: github-token: ${{ secrets.GITHUB_TOKEN }} config-path: .github/label-config.yml fail-on-missing-config: 'true'

---

on:
pull_request_target:
types: [opened, synchronize, reopened]
jobs:
label:
runs-on: ubuntu-latest
permissions:
contents: read
pull-requests: write
steps:
- uses: SCL339/pr-labeler-action@v1.0.0

---

m/SCL339/pr-labeler-action.git cd pr-labeler-action

Test locally with a mock event:

python3 entrypoint.py

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- 🚀 **Deploy your frontend** on [Vercel](https://vercel.com/?utm_source=scl339&utm_campaign=oss)
- ⭐ **Star this repo** to help others discover it

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## 📄 License