- Created comprehensive migration guide at docs/MULTI_REPO_MIGRATION.md
- Covers OSS contributor, team, multi-phase, and persona workflows
- Step-by-step setup instructions with examples
- Configuration reference and troubleshooting
- Implemented bd migrate-issues command
- Move issues between repos with filtering (status/priority/labels/type)
- Dependency preservation with upstream/downstream/closure options
- Dry-run mode and strict validation
- Interactive confirmation with --yes override
- Updated README.md and AGENTS.md with migration guide links
Completes: bd-c3ei, bd-mlcz
Part of epic: bd-8rd (Migration and onboarding for multi-repo)
Amp-Thread-ID: https://ampcode.com/threads/T-c5a7a780-b05e-4cc3-a7c1-5de107821b7e
Co-authored-by: Amp <amp@ampcode.com>
