diff --git a/.custodian-brief.md b/.custodian-brief.md
index 6671595..3917c64 100644
--- a/.custodian-brief.md
+++ b/.custodian-brief.md
@@ -2,12 +2,23 @@
 # Custodian Brief — kaizen-agentic
 
 **Domain:** custodian
-**Last synced:** 2026-06-16 23:04 UTC
+**Last synced:** 2026-06-18 02:54 UTC
 **State Hub:** http://127.0.0.1:8000 *(adjust if running on a remote machine)*
 
 ## Active Workstreams
 
-*(none — repo may need first-session setup)*
+### Coulomb-loop supplier engagement (customer-repo playbook)
+Progress: 1/10 done  |  workstream_id: `80f473eb-d052-4f50-a633-806f03c469be`
+
+**Open tasks:**
+- · Document customer engagement repo layout  `177bb16c`
+- · Playbook skeleton  `90bd0fc2`
+- · metrics record --emit-event  `26ee0f8d`
+- · schedule init --engagement  `62324bd2`
+- · ADR-006 customer engagement convention  `5c06cdd9`
+- · Tests  `f45077ea`
+- · Absorb supplier-notes into playbook v1  `0ef49fb5`
+- … and 2 more open tasks
 
 ---
 ## MCP Orientation (when available)
diff --git a/.kaizen/schedule.yml b/.kaizen/schedule.yml
new file mode 100644
index 0000000..743ba91
--- /dev/null
+++ b/.kaizen/schedule.yml
@@ -0,0 +1,17 @@
+# Kaizen scheduled agent execution (ADR-005)
+# Engagement: coulomb-loop bootstrap — hourly crons, daily cadence enum
+# Regulator promotes to daily/weekly per ADR-003
+version: '1'
+timezone: Europe/Berlin
+agents:
+  coach:
+    cadence: daily
+    cron: "15 * * * *"
+    enabled: true
+  optimization:
+    cadence: daily
+    cron: "30 * * * *"
+    enabled: true
+  tdd-workflow:
+    cadence: monthly
+    enabled: false
diff --git a/workplans/kaizen-agentic-WP-0008-coulomb-loop-supplier-engagement.md b/workplans/kaizen-agentic-WP-0008-coulomb-loop-supplier-engagement.md
new file mode 100644
index 0000000..9770d7c
--- /dev/null
+++ b/workplans/kaizen-agentic-WP-0008-coulomb-loop-supplier-engagement.md
@@ -0,0 +1,302 @@
+---
+id: KAIZEN-WP-0008
+type: workplan
+title: "Coulomb-loop supplier engagement (customer-repo playbook)"
+domain: custodian
+repo: kaizen-agentic
+status: active
+owner: kaizen-agentic
+topic_slug: custodian
+customer_repo: coulomb-loop
+created: "2026-06-18"
+updated: "2026-06-18"
+depends_on:
+  - KAIZEN-WP-0006
+  - KAIZEN-WP-0004
+tasks:
+  - id: T01
+    status: todo
+    title: Document customer engagement repo layout from coulomb-loop reference
+  - id: T02
+    status: todo
+    title: Add docs/integrations/customer-engagement-playbook.md skeleton
+  - id: T03
+    status: todo
+    title: Implement metrics record --emit-event for kaizen.metrics.recorded
+  - id: T04
+    status: todo
+    title: Add schedule init --engagement mode for customer repos
+  - id: T05
+    status: done
+    title: Support pilot schedule init on kaizen-agentic the-custodian activity-core
+  - id: T06
+    status: todo
+    title: Draft ADR-006 customer engagement convention
+  - id: T07
+    status: todo
+    title: Absorb coulomb-loop supplier-notes into playbook v1
+  - id: T08
+    status: todo
+    title: ActivityDefinition override manifest design for hybrid sync
+  - id: T09
+    status: todo
+    title: Tests for emit-event and engagement init
+  - id: T10
+    status: todo
+    title: Update CHANGELOG wiki and cross-link coulomb-loop INTENT
+state_hub_workstream_id: "80f473eb-d052-4f50-a633-806f03c469be"
+---
+
+# KAIZEN-WP-0008 — Coulomb-loop Supplier Engagement
+
+**Status:** active
+**Owner:** kaizen-agentic (supplier)
+**Customer:** `coulomb-loop` (coulomb_social domain)
+**Depends on:** WP-0006 (schedule contract), WP-0004 (activity-core integration)
+
+## Goal
+
+Deliver supplier capabilities for Coulomb's self-improvement loop engagement and
+**generalize learnings** into a reusable customer-repo bootstrap playbook — so the
+next engagement requires ≤50% setup effort compared to coulomb-loop.
+
+This workplan is the **supplier mirror** of coulomb-loop LOOP-WP-0001–0004.
+Customer-specific operations stay in `coulomb-loop`; reusable IP stays here.
+
+## Engagement model
+
+```mermaid
+flowchart LR
+  CL[coulomb-loop customer]
+  KA[kaizen-agentic supplier]
+  TR[target repos fleet]
+  AC[activity-core]
+
+  CL -->|contracts rosters definitions| AC
+  KA -->|agents CLI ADRs playbook| CL
+  KA -->|schedule prepare metrics| TR
+  AC -->|tasks| TR
+```
+
+See coulomb-loop `docs/adr/ADR-002-customer-supplier-boundary.md`.
+
+## Sequencing (per DEC-004 default — smoke-first)
+
+```
+Part 1 (T01–T02, T05)  ── parallel with coulomb-loop smoke test
+Part 2 (T03–T04, T06–T09) ── after first hourly E2E pass
+Part 3 (T07–T08, T10)  ── after LOOP-WP-0004 supplier-notes available
+```
+
+---
+
+## Part 1 — Document and support smoke test
+
+## Document customer engagement repo layout
+
+```task
+id: KAIZEN-WP-0008-T01
+status: todo
+priority: high
+state_hub_task_id: "177bb16c-6239-43f2-8d99-f4498c31d74a"
+```
+
+Create `docs/integrations/customer-engagement-repo-layout.md` from coulomb-loop
+reference:
+
+```
+customer-repo/
+  INTENT.md SCOPE.md
+  workplans/LOOP-WP-* or <PREFIX>-WP-*
+  docs/adr/ docs/decisions/
+  history/
+  activity-definitions/   # customer-owned copies
+  loops/<loop-id>/        # roster cadence health
+```
+
+No code — layout contract only.
+
+## Playbook skeleton
+
+```task
+id: KAIZEN-WP-0008-T02
+status: todo
+priority: high
+state_hub_task_id: "90bd0fc2-6e49-4a59-9a78-91e749cef8a6"
+```
+
+Add `docs/integrations/customer-engagement-playbook.md`:
+
+1. Register repo (state-hub `register_project.sh`)
+2. Write INTENT + 4 loop workplans
+3. Run `fix-consistency`
+4. Pilot `schedule init` on target repos
+5. Sync ActivityDefinitions to activity-core
+6. Bootstrap hourly → regulator promotes cadence
+
+Link to coulomb-loop as reference implementation.
+
+## Support pilot schedule init
+
+```task
+id: KAIZEN-WP-0008-T05
+status: done
+priority: high
+state_hub_task_id: "a48598b7-2a33-46ef-8594-6a2702459f39"
+```
+
+Completed 2026-06-18 on kaizen-agentic, the-custodian, activity-core. Bootstrap
+hourly crons patched manually; friction logged in coulomb-loop `supplier-notes.md`.
+
+Execute on pilot repos (after DEC-001 approval):
+
+```bash
+for repo in kaizen-agentic the-custodian activity-core; do
+  cd ~/$repo
+  kaizen-agentic schedule init --timezone Europe/Berlin
+  kaizen-agentic memory init coach
+  kaizen-agentic memory init optimization
+  kaizen-agentic schedule validate
+done
+```
+
+Record friction in coulomb-loop `loops/kaizen-stack/supplier-notes.md`.
+
+---
+
+## Part 2 — Supplier automation
+
+## metrics record --emit-event
+
+```task
+id: KAIZEN-WP-0008-T03
+status: todo
+priority: medium
+state_hub_task_id: "26ee0f8d-2b69-4796-b276-b76238d67546"
+```
+
+Emit NATS event `kaizen.metrics.recorded` when flag set:
+
+```bash
+kaizen-agentic metrics record coach --success --time 120 --quality 0.9 --emit-event
+```
+
+Payload per coulomb-loop LOOP-WP-0002 T03 / `low-success-rate-review` definition.
+Default: off (backward compatible).
+
+## schedule init --engagement
+
+```task
+id: KAIZEN-WP-0008-T04
+status: todo
+priority: medium
+state_hub_task_id: "62324bd2-1737-4864-889c-56179d0d11e8"
+```
+
+Scaffold customer-target schedule with bootstrap crons:
+
+```bash
+kaizen-agentic schedule init --engagement coulomb-loop \
+  --agents coach,optimization --bootstrap-cadence hourly
+```
+
+Writes hourly crons per ADR-003; documents engagement slug in schedule comment.
+
+## ADR-006 customer engagement convention
+
+```task
+id: KAIZEN-WP-0008-T06
+status: todo
+priority: medium
+state_hub_task_id: "5c06cdd9-655d-4837-b725-1f89b83db6d4"
+```
+
+`docs/adr/ADR-006-customer-engagement-convention.md` — formalize supplier/customer
+split, `.kaizen/` placement in target repos, playbook lifecycle.
+
+## Tests
+
+```task
+id: KAIZEN-WP-0008-T09
+status: todo
+priority: medium
+state_hub_task_id: "f45077ea-5d24-4a85-bac2-ab9a3f61c20b"
+```
+
+Unit tests: `--emit-event` payload shape; `--engagement` schedule output.
+
+---
+
+## Part 3 — Playbook v1 and hybrid sync design
+
+## Absorb supplier-notes into playbook v1
+
+```task
+id: KAIZEN-WP-0008-T07
+status: todo
+priority: low
+state_hub_task_id: "0ef49fb5-af2f-4adf-aa90-1ea2cf389d00"
+```
+
+After LOOP-WP-0004 T07 draft in coulomb-loop, merge into playbook v1.
+Target: second customer can copy template repo and run checklist in one session.
+
+## ActivityDefinition override manifest
+
+```task
+id: KAIZEN-WP-0008-T08
+status: todo
+priority: low
+state_hub_task_id: "c9bee570-89b5-43e5-aabc-23c7dcc4e30c"
+```
+
+Design-only (implements DEC-003 option C): YAML manifest mapping supplier
+definition id → customer cron/labels/enabled overrides. No runtime in v1.
+
+## Documentation release
+
+```task
+id: KAIZEN-WP-0008-T10
+status: todo
+priority: low
+state_hub_task_id: "052a592b-ae7c-4213-9e09-eb8b37119d5e"
+```
+
+Update `wiki/EcosystemIntegration.md`, `CHANGELOG [Unreleased]`, cross-link
+coulomb-loop INTENT from `docs/integrations/customer-engagement-playbook.md`.
+
+---
+
+## ADR-004 follow-on (customer accepted 2026-06-18)
+
+After bootstrap metrics baseline, supplier may add:
+
+```
+kaizen-agentic metrics rotation-signals [--target PATH]
+```
+
+Reads `.kaizen/metrics/` + optimizer output; emits saturation score per
+`coulomb-loop/loops/regulator/rotation-policy.yml`. Feeds LOOP-WP-0004 T09.
+Track as KAIZEN-WP-0008 extension task if needed after T03 ships.
+
+## Out of scope
+
+- activity-core resolver implementation (activity-core repo)
+- coulomb-loop workplan execution (customer repo)
+- Fleet-wide rollout beyond agreed pilot (DEC-001)
+
+## Success criteria
+
+1. Pilot repos have valid `.kaizen/schedule.yml` via supplier CLI
+2. `metrics record --emit-event` enables LOOP-WP-0002 event path
+3. Playbook v1 committed; coulomb-loop cited as reference
+4. ADR-006 accepted
+
+## Customer workplans (do not duplicate here)
+
+| Customer WP | Supplier support |
+|-------------|------------------|
+| LOOP-WP-0001 | T05 schedule init; activity-core handoff docs |
+| LOOP-WP-0002 | T03 emit-event |
+| LOOP-WP-0003 | scope-analyst agent (existing) |
+| LOOP-WP-0004 | T07 playbook feedback |