feat: add genai-assisted label

[pierresisson]

What does it do? Why?

This feature automatically detects AI-assisted pull requests and applies the genai-assisted label. The GitHub Action is the single source of truth for adding the label.

Unified Hook System

Claude Code and Cursor use the same mechanism to signal AI assistance, with agent-specific markers:

Agent (Claude Code or Cursor) stops
         ↓
Hook "stop" creates marker file (.claude-assisted or .cursor-assisted)
         ↓
User commits (from any terminal, IDE, etc.)
         ↓
Git hook "prepare-commit-msg" detects marker
         ↓
Adds "Co-Authored-By: Claude" or "Co-Authored-By: Cursor" + removes marker
         ↓
GitHub Action detects Co-Authored-By → Adds label

Files involved

File	Purpose
.githooks/prepare-commit-msg	Adds Co-Authored-By based on marker file
.cursor/hooks.json	Cursor hook: creates .cursor-assisted when agent stops
.claude/settings.json	Claude Code hook: creates .claude-assisted when agent stops
.cursor-assisted / .claude-assisted	Temporary marker files (gitignored)

Co-Authored-By tags

Agent	Marker file	Co-Authored-By
Cursor	.cursor-assisted	Co-Authored-By: Cursor
Claude Code	.claude-assisted	Co-Authored-By: Claude

Why this approach?

• Single source of truth: Only the GHA adds the label (no duplicate logic)
• Works with external terminals: The marker file persists until commit
• Agent-specific tags: Each agent gets its own Co-Authored-By signature
• No false positives: Co-Authored-By only added when an agent actually worked

Detection Flags Summary (GitHub Action)

Flag	Source	Examples
Bot Author	PR author	copilot[bot], claude[bot], cursor[bot], codeium[bot], tabnine[bot], cody[bot], devin[bot], aider[bot]
Branch Prefix	Branch name	cursor/, claude/, ai/, copilot/, aider/, cody/, chatgpt/, genai/, windsurf/, devin/
PR Body Pattern	PR description	AI-assisted, generated with Claude, using Copilot, LLM-assisted
AI Label	Existing labels	ai-assisted, copilot, claude, chatgpt, cursor, genai, llm-assisted
Commit Signature	Commit message	Co-Authored-By: Claude, Co-Authored-By: Cursor, Generated with [Claude Code], [Copilot], [AI]
Commit Emoji	Commit message	Contains 🤖 emoji
Rapid Commits	Commit timing	3+ commits within 30 seconds
Comment Pattern	PR comments	I used Claude, Copilot generated this, AI wrote this

See README.md for more information.

Co-authored-by: Claude

[Copilot]

Pull request overview

This PR adds automatic detection and labeling of GenAI-assisted pull requests to the existing validation action. The feature scans PRs for indicators of AI tool usage (like Claude, Copilot, ChatGPT, etc.) and applies a genai-assisted label when detected.

• Implements comprehensive pattern matching for 70+ AI coding tools and assistants
• Detects AI assistance through multiple signals: PR author, body, labels, commits, and comments
• Integrates detection into the existing PR validation workflow with graceful error handling

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 19 comments.

Show a summary per file

File	Description
lib/genaiPatterns.js	Defines exhaustive patterns for detecting AI tools, bots, commit signatures, and labels
lib/genaiDetection.js	Core detection logic that checks PRs across multiple dimensions (author, body, commits, comments)
lib/genaiDetection.test.js	Unit tests covering pattern matching for bots, labels, commits, PR bodies, and comments
lib/actions/pullRequest.js	Integrates GenAI detection into PR validation workflow with error handling
README.md	Documents the GenAI detection feature, triggers, supported tools, and customization options

---

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[Copilot]

Pull request overview

Copilot reviewed 7 out of 7 changed files in this pull request and generated 11 comments.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

Pull request overview

Copilot reviewed 7 out of 7 changed files in this pull request and generated 14 comments.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

Pull request overview

Copilot reviewed 12 out of 14 changed files in this pull request and generated 7 comments.

Comments suppressed due to low confidence (2)

README.md:3

• This line appears to be a debug note that should be removed before merging. It doesn't provide value in the README and looks unprofessional.

[![NPM](https://github.com/mobsuccess-devops/github-actions-mobsuccess/actions/workflows/npm.yml/badge.svg)](https://github.com/mobsuccess-devops/github-actions-mobsuccess/actions/workflows/npm.yml)

README.md:1

• The company name "GitHub" should be capitalized correctly as "GitHub" not "Github".

# Github Mobsuccess action

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💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

Pull request overview

Copilot reviewed 11 out of 13 changed files in this pull request and generated 4 comments.

---

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