# S007 — threads

The Zulip insight, as records: a space holds many threads; every post
files under exactly one.

## What landed

- `at.linji.thread` records: `{title, tags[], createdAt}`, living in the
  **creator's repo** inside the space (same member-write model as posts;
  authority-repo writes are impossible for members — see S006).
- Posts reference their thread by **canonical AT-URI**; the `topic`
  string is retired (M001 scenario deleted as superseded).
- CLI: `thread create/list --tag`, `post --thread`, `move` (author, via
  `space.putRecord`); readSpace resolves threads + posts across member
  repos into one grouped view.
- OAuth scope gains `collection=at.linji.thread`.

## Deferred

Owner move/tag-anything: needs a zds endpoint for the authority to
rewrite member records. Landed in S008.

## Verification

scenario-space — 44 checkpoints, PASS.