Add runbook pack spec, validator, legacy launcher, and workplans RBT-WP-0002..0006

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

Assistant: claude-code
Assistant-Model: sonnet
Assistant-Process: 295952@bnt-lap001
Assistant-Session: e93f64ad-516c-46eb-9666-aad8d300c477

README.md

@@ -1,3 +1,21 @@
 # runbook-tutorials
 
-A userinterface specialized to present runbook tutorials that with parameters can guide through actual it administration and operation tasks.
+A user interface specialized to present runbook tutorials that with parameters
+can guide through actual IT administration and operation tasks.
+
+- **Intent:** `INTENT.md` · **Scope:** `SCOPE.md`
+- **Pack specification:** `docs/pack-spec.md`, schema in `schema/`
+- **Packs live where the procedure lives:** `runbooks/<pack>/pack.yaml` in the owning repo.
+  Examples: `net-kingdom/runbooks/`, and `runbooks/example-hello/` here.
+
+```bash
+python3 -m rtut validate <repo-root>      # validate every pack
+python3 -m rtut list <repo-root>          # id, engine, exercise status, title
+python3 -m rtut show <pack.yaml>          # steps with owners and done-when
+python3 -m rtut render <pack.yaml> <step> -p name=value
+python3 -m rtut launch <pack.yaml>        # legacy-command packs: start the existing console
+make test
+```
+
+Status: the specification, validator and legacy launch work; run state, evidence
+and the UI are planned (`workplans/RBT-WP-0003` and `RBT-WP-0004`).