Record D&D playbook preparation for review

docs/roadmap/implementation.md

@@ -1,6 +1,6 @@
 # Implementation Plan 0016: Prepare the D&D Deployment Playbook
 
-Status: ready
+Status: in_progress
 
 Target executor: GPT-5.6-Terra
 
@@ -50,6 +50,8 @@ deployment and live-acceptance stages. Do not execute them.
 
 ## Stage 1: Finish Consumer Comments and Usage Documentation
 
+Completion: complete (consumer `7f8353d74efabb5ae408e41be9837df53010dd95`)
+
 ### Objective and Owning Repository
 
 Make the existing committed consumer configuration self-explanatory in
@@ -123,6 +125,8 @@ No deployment or real credential provisioning is required.
 
 ## Stage 2: Record the Repository Preparation Handoff
 
+Completion: complete (handoff recorded by this change)
+
 ### Objective and Owning Repository
 
 Record Feature 0016 implementation readiness for independent review in the
@@ -167,10 +171,21 @@ required unless separately requested.
 
 ## Progress Notes
 
-The earlier consumer preparation is committed in `716a80e` and `12b2462`.
-This revised two-stage plan finishes comments and documentation, then records
-handoff. Earlier live-deployment stages and their open questions are withdrawn
-from Feature 0016. No live deployment has been performed.
+- Consumer `716a80e` added the initial runbook, and `12b2462` committed the
+  minimal playbook, public host choices, and reviewed dependency manifest.
+  Public dependency installation from the mixed manifest succeeded, host
+  listing selected only `pipeline-dnd`, and syntax checking passed.
+- Stage 1 is complete in consumer commit
+  `7f8353d74efabb5ae408e41be9837df53010dd95`. The plaintext inventory now
+  explains its unresolved Vault references, and the runbook distinguishes the
+  completed repository preparation from future operator installation,
+  credential provisioning, deployment, and application operation.
+- Stage 1 changed only comments and documentation, so the prior installation,
+  host-listing, and syntax evidence was reused as directed. `git diff --check`
+  passed, and the consumer working tree is clean.
+- Stage 2 records the implementation handoff for independent review. No live
+  deployment, target validation, credential provisioning, or pipeline session
+  was performed or is claimed by Feature 0016.
 
 ## Open Questions