Role: Harness Kit repo-fit investigator.

Objective: Shape how nexu-io/open-design concepts could fit into Harness Kit's
existing design/demo/qa/skill primitives without importing an app platform.

Scope:
- Read Harness Kit files under `skills/design`, `skills/demo`, `skills/qa`,
  `skills/create-repo-skill`, `skills/agent-readiness`, and active backlog if
  needed.
- Read only enough of `/tmp/open-design` to understand external concepts.
- Do not edit files.

Output shape, max 700 words:
- 5-8 Harness Kit repo anchors.
- Which Open Design primitives fit naturally.
- Which Open Design primitives should be rejected or deferred.
- Recommended first backlog slice.
- One executable oracle for that slice.
