# GitHub Merge Queue Configuration
#
# This file configures the merge queue behavior for BlackRoad OS.
# The merge queue ensures safe, orderly merging of PRs with automated testing.
#
# Documentation: https://docs.github.com/en/repositories/configuring-branches-and-merges-in-your-repository/configuring-pull-request-merges/managing-a-merge-queue

# Queue Configuration
queue:
  # Required status checks that must pass before merging
  required_checks:
    - "Backend Tests"
    - "CI / validate-html"
    - "CI / validate-javascript"
    - "CI / security-scan"

  # Merge method (options: merge, squash, rebase)
  merge_method: squash

  # Number of PRs that can be merged together in a batch
  # Higher values increase throughput but may make failures harder to debug
  batch_size: 5

  # Maximum time (in minutes) to wait for checks to complete
  check_timeout: 30

  # Automatically update PRs in the queue with the base branch
  auto_update: true

  # Minimum number of approvals required
  min_approvals: 0  # Set to 0 for auto-merge of safe PRs

  # Allow bypassing the queue for specific labels
  bypass_labels:
    - "hotfix"
    - "emergency"

# Auto-merge Configuration
auto_merge:
  # Enable auto-merge for PRs with these labels
  enabled_labels:
    - "claude-auto"
    - "atlas-auto"
    - "docs"
    - "chore"
    - "tests-only"
    - "dependencies"

  # Require all checks to pass
  require_checks: true

  # Require reviews for auto-merge
  require_reviews: false

  # Auto-dismiss stale reviews
  dismiss_stale_reviews: true

  # Allowed base branches for auto-merge
  allowed_base_branches:
    - "main"
    - "develop"

  # Excluded file patterns (PRs touching these files won't auto-merge)
  excluded_patterns:
    - ".github/workflows/**"
    - "backend/app/config.py"
    - "backend/app/database.py"
    - "railway.toml"
    - "railway.json"

# Branch Protection Requirements
# These are enforced before a PR enters the merge queue
branch_protection:
  # Require status checks to pass
  require_status_checks: true

  # Require branches to be up to date before merging
  require_up_to_date: true

  # Require pull request reviews
  require_pull_request_reviews: false  # Disabled for AI auto-merge

  # Require signed commits
  require_signed_commits: false

  # Restrict who can push to matching branches
  restrictions:
    users: []
    teams: []

# Notification Settings
notifications:
  # Notify when PR is added to queue
  on_queue_add: true

  # Notify when PR is merged
  on_merge: true

  # Notify when PR fails checks in queue
  on_failure: true

  # Channels to notify (Slack, Discord, etc.)
  channels:
    - type: "github_comment"
      enabled: true
    # - type: "slack"
    #   webhook_url: "${SLACK_WEBHOOK_URL}"
    #   enabled: false

# Queue Priority Rules
# Higher priority PRs are processed first
priority_rules:
  - label: "hotfix"
    priority: 100
  - label: "security"
    priority: 90
  - label: "breaking-change"
    priority: 80
  - label: "claude-auto"
    priority: 50
  - label: "docs"
    priority: 30
  - label: "chore"
    priority: 20

# Conflict Resolution
conflict_resolution:
  # Action to take when conflicts are detected
  # Options: remove_from_queue, notify, auto_resolve
  action: "remove_from_queue"

  # Notify PR author
  notify_author: true

  # Comment template
  comment: |
    This PR has been removed from the merge queue due to merge conflicts.
    Please resolve the conflicts and re-add to the queue.

# Rate Limiting
rate_limiting:
  # Maximum merges per hour
  max_merges_per_hour: 20

  # Maximum queue size
  max_queue_size: 50

  # Cooldown period (minutes) after a failed merge
  failure_cooldown: 5

# Integration with Operator Engine
operator_integration:
  # Enable Operator Engine automation
  enabled: true

  # Webhook URL for Operator Engine
  webhook_url: "${OPERATOR_WEBHOOK_URL}"

  # Actions to trigger via Operator
  actions:
    - "update_branch"
    - "rerun_checks"
    - "resolve_conflicts"
    - "add_labels"

  # Auto-trigger actions
  auto_trigger:
    update_branch_on_queue: true
    rerun_failed_checks: true
    sync_labels: true