ci: Add CodeRabbit configuration

.coderabbit.yaml

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+# yaml-language-server: $schema=https://coderabbit.ai/integrations/schema.v2.json
+# CodeRabbit config docs: https://docs.coderabbit.ai/reference/configuration
+
+# General settings
+language: "en-US"
+early_access: true
+
+# REVIEW CONFIGURATION
+reviews:
+  profile: "chill"
+  review_status: true
+  commit_status: true
+  fail_commit_status: false
+  request_changes_workflow: false
+  in_progress_fortune: false
+
+  high_level_summary: false
+  high_level_summary_in_walkthrough: false
+  collapse_walkthrough: true
+  changed_files_summary: false
+  sequence_diagrams: false
+  estimate_code_review_effort: false
+  poem: false
+
+  related_issues: false
+  related_prs: false
+
+  suggested_labels: false
+  auto_apply_labels: false
+  suggested_reviewers: false
+  auto_assign_reviewers: false
+
+  auto_review:
+    enabled: true
+    drafts: false
+    base_branches:
+      - ".*"
+
+  auto_title_placeholder: "@coderabbitai"
+  auto_title_instructions: |
+    Generate PR titles following Conventional Commits format: `type: Subject`
+
+    Title strategy:
+    - Focus on the PRIMARY contribution or most central feature delivered in the PR
+    - Do NOT base the title on the last commit message
+    - Do NOT choose the most verbose or largest change
+    - Identify the core purpose or business value of the PR
+    - Keep titles concise and meaningful
+
+    Requirements:
+    - Use lowercase for type: feat, fix, docs, style, refactor, perf, test, build, ci, chore, revert, or plan
+    - Subject must start with an uppercase letter
+    - Keep total title length ≤ 65 characters
+    - Use imperative mood (e.g., "Add feature" not "Added feature")
+
+    Examples:
+    - `feat: Add WebSocket support` (not "Update connection manager")
+    - `fix: Resolve authentication timeout` (not "Fix bug in auth service")
+    - `docs: Improve API examples` (not "Update documentation files")
+    - `chore: Update dependencies` (when that's the sole purpose)
+
+  # Code enhancement features
+  finishing_touches:
+    docstrings:
+      enabled: false              # Generate docstrings for PRs/MRs (default: true)
+    unit_tests:
+      enabled: false              # Generate unit tests for PRs/MRs (default: true)
+
+  # Pre-merge validation checks
+  pre_merge_checks:
+    docstrings:                   # Docstring coverage check (default: warning)
+      mode: off
+    description:                  # PR description validation (default: warning)
+      mode: off
+    issue_assessment:             # Linked issue assessment (default: warning)
+      mode: off
+    title:                        # PR title validation (default: warning)
+      mode: warning
+
+  # Files to include/exclude from reviews
+  path_filters:
+    - "**"                    # Include all (base)
+    - "!.specify/scripts/"    # Spec Kit (except memory)
+    - "!.specify/templates/"  # Spec Kit (except memory)
+    - "!.github/prompts/speckit.*"  # Spec Kit prompts
+    - "!node_modules/"        # NPM dependencies
+    - "!*-lock.json"          # NPM/PNPM lock files
+    - "!packages/"            # NuGet packages cache
+    - "!.jekyll-cache/"       # Jekyll cache
+    - "!vendor/"              # Ruby vendor and gem files
+    - "!Gemfile.lock"         # Ruby dependencies lock
+    - "!bin/"                 # .NET build output
+    - "!obj/"                 # .NET build intermediate files
+    - "!*.g.cs"               # Generated source files
+    - "!*.xlsx"               # Manual calculation spreadsheets
+    - "!*.bak"                # Backup files
+
+  # Tool integrations
+  tools:
+    gitleaks:
+      enabled: true
+    semgrep:
+      enabled: true
+    osvScanner:
+      enabled: true
+    markdownlint:
+      enabled: true
+    yamllint:
+      enabled: true
+    actionlint:
+      enabled: true
+    shellcheck:
+      enabled: true
+    github-checks:
+      enabled: true
+      timeout_ms: 400000
+    eslint:
+      enabled: false
+    ruff:
+      enabled: false
+    golangci-lint:
+      enabled: false
+    hadolint:
+      enabled: false
+    checkov:
+      enabled: false
+    htmlhint:
+      enabled: false
+    languagetool:
+      enabled: false
+    biome:
+      enabled: false
+    oxc:
+      enabled: false
+
+# KNOWLEDGE BASE CONFIGURATION
+knowledge_base:
+  opt_out: false
+  code_guidelines:
+    enabled: true
+    filePatterns:
+      - ".github/copilot-instructions.md"
+      - ".github/instructions/*.instructions.md"
+      - ".github/instructions/**/*.instructions.md"
+      - "**/agents.md"
+  learnings:
+    scope: "auto"
+  issues:
+    scope: "auto"
+  pull_requests:
+    scope: "auto"
+  mcp:
+    usage: "auto"