chore: import upstream snapshot with attribution

cli-tool/components/commands/sync/bulk-import-issues.md

@@ -0,0 +1,36 @@
+---
+allowed-tools: Read, Write, Edit, Bash
+argument-hint: [import-scope] | --state | --label | --milestone | --batch-size
+description: Bulk import GitHub issues to Linear with comprehensive progress tracking and error handling
+---
+
+# Bulk Import Issues
+
+Bulk import GitHub issues to Linear with advanced processing capabilities: **$ARGUMENTS**
+
+## Current Import Context
+
+- Repository: !`gh repo view --json nameWithOwner -q .nameWithOwner 2>/dev/null || echo "No repo context"`
+- Issue count: !`gh api repos/{owner}/{repo}/issues?state=all --paginate | jq length 2>/dev/null || echo "Check manually"`
+- Linear teams: Check available Linear teams and projects for import mapping
+- Rate limits: !`gh api rate_limit -q '.rate | "GitHub: \(.remaining)/\(.limit)"' 2>/dev/null || echo "Check GitHub rate limit"`
+
+## Task
+
+Execute efficient bulk import of GitHub issues to Linear with comprehensive management:
+
+**Import Scope**: Use $ARGUMENTS to filter by state, labels, milestones, or configure batch processing parameters
+
+**Import Pipeline**:
+1. **Pre-Import Analysis** - Issue discovery, duplicate detection, import estimation, resource planning
+2. **Batch Configuration** - Dynamic batch sizing, rate limit management, progress tracking, error handling
+3. **Data Transformation** - Field mapping, priority inference, user mapping, content enhancement
+4. **Import Execution** - Parallel processing, retry logic, transaction management, progress reporting
+5. **Error Recovery** - Failed item handling, retry mechanisms, partial import recovery, validation
+6. **Post-Import Actions** - Cross-reference creation, GitHub updates, mapping files, notifications
+
+**Advanced Features**: Dynamic batch adjustment, intelligent rate limiting, duplicate detection, comprehensive error recovery, progress visualization.
+
+**Quality Assurance**: Pre-import validation, post-import verification, data integrity checks, comprehensive audit trails.
+
+**Output**: Complete import results with success metrics, failed item reports, mapping documentation, and performance analytics for large-scale issue migration.