xref

Take a snapshot of everything a GitHub PR/issue connects to, so no orphan gets left behind: and so you never open a PR that duplicates work already in flight. The CLI is the hands (crawls, guards, classifies, attributes, persists); you are the brain (read the graph, run the one semantic step it hands back). xref is a globally-installed command (if it is missing, install it per compatibility above).

Steps

Crawl the seed.
```
xref <url|number> --repo owner/repo [--depth N] [--cluster] [--prioritize]
```
Multi-seed / backlog survey: --seeds 1,2,3 or --label <label>. Add --prioritize when the ask is "what should I fix first". xref --help lists every flag. Done when the CLI has printed the Nodes list and the orphan checklist.

Map the ask onto the invocation: