write onboarding-complete flag for Claude Code interactive TUI
The Claude Code TUI checks ~/.claude.json for hasCompletedOnboarding before respecting stored credentials. Without this flag, the login selection screen always appears regardless of CLAUDE_CODE_OAUTH_TOKEN or .credentials.json. Write the flag during token injection.
add release workflow decomposition spec and implementation plan
Design spec and TDD implementation plan for decomposing vrg-release
into independent tools (vrg-version, vrg-changelog, vrg-promote)
aligned with standard Git Flow mechanics.