feat: complete KAIZEN-WP-0008 customer engagement supplier deliverables

Add repo layout doc, ADR-006 convention, playbook v1 with supplier-notes,
override manifest design, and wiki integration. Mark workplan done (10/10).

docs/integrations/activity-definition-override-manifest.md

@@ -0,0 +1,72 @@
+# ActivityDefinition Override Manifest (design)
+
+**Status:** design-only (DEC-003 option C future)
+**Implements:** KAIZEN-WP-0008 T08
+**Runtime:** none in v1 — customer-owned copies (option A) during bootstrap
+
+## Problem
+
+Customer repos copy supplier ActivityDefinitions and tune cron, labels, and
+`enabled` flags. When supplier templates change, manual merge is error-prone.
+A manifest declares **source + overrides** without duplicating full definition bodies.
+
+## Proposed file
+
+`activity-definitions/manifest.yaml` in the customer repo:
+
+```yaml
+version: "1"
+supplier_repo: kaizen-agentic
+supplier_path: docs/integrations/activity-definitions
+engagement: coulomb-loop
+
+definitions:
+  - supplier_id: kaizen-weekly-coach-orientation
+    customer_id: coulomb-hourly-coach-orientation
+    source: ../../kaizen-agentic/docs/integrations/activity-definitions/weekly-coach-orientation.md
+    overrides:
+      id: coulomb-hourly-coach-orientation
+      name: Hourly Kaizen Coach Orientation (coulomb-loop bootstrap)
+      owner: coulomb-loop
+      governance: coulomb_social
+      enabled: true
+      trigger:
+        cron_expression: "15 * * * *"
+      context_sources:
+        - params:
+            roster: /home/worsch/coulomb-loop/loops/kaizen-stack/roster.yaml
+            cadence: daily
+
+  - supplier_id: kaizen-low-success-rate-review
+    customer_id: coulomb-low-success-rate-review
+    overrides:
+      enabled: false
+      owner: coulomb-loop
+```
+
+## Merge rules (future tooling)
+
+1. Parse supplier definition markdown (frontmatter + body)
+2. Deep-merge `overrides` (customer wins on conflict)
+3. Write customer copy to `activity-definitions/<customer_id>.md`
+4. `sync_activity_definitions` reads customer copies only (unchanged today)
+
+## Ownership
+
+| Layer | Owner |
+|-------|-------|
+| Manifest schema | kaizen-agentic (supplier ADR/extension) |
+| Manifest instance | customer repo |
+| Merge CLI | TBD — `coulomb-loop` or `activity-core` |
+| Sync runtime | activity-core (unchanged) |
+
+## Bootstrap path (today)
+
+Use **option A**: hand-copy definitions, edit cron/labels, track drift in
+`loops/kaizen-stack/supplier-notes.md`. Revisit manifest when a second customer
+engagement starts.
+
+## Related
+
+- coulomb-loop `docs/decisions/DEC-003-activity-definition-ownership.md`
+- [customer-engagement-playbook.md](customer-engagement-playbook.md)