docs(p15): close G9G and define PR review cadence

sw-block/design/v3-phase-15-g9g-blockmaster-product-loop-mini-plan.md

@@ -1,7 +1,7 @@
 # V3 Phase 15 G9G - Blockmaster Product Loop To Publisher Mini-Plan
 
 Date: 2026-05-03
-Status: close-ready on `p15-g9g/blockmaster-product-loop@7ed9ab2`; QA verification pending
+Status: CLOSED; G9G merged to `phase-15@2b90018`, G9G-3 usability follow-up merged to `phase-15@2d13b02`
 Branch target: `p15-g9g/blockmaster-product-loop`
 Scope: first live blockmaster loop that turns verified placement into publisher input
 
@@ -122,7 +122,7 @@ Only after that should we wire external API/CLI verbs or CSI create/publish.
 
 ## 7. Close Snapshot
 
-Close target: `seaweed_block@7ed9ab2`.
+Close target: `seaweed_block@7ed9ab2`; merged to `phase-15@2b90018`.
 
 G9G closes the first product-loop assignment path:
 
@@ -157,3 +157,5 @@ Close non-claims:
 - Create/delete/attach/detach user verbs are follow-up.
 - Blank-pool replica-id allocation is follow-up.
 - CSI and M01 hardware smoke are follow-up.
+
+Follow-up G9G-3 cluster-spec YAML facade closed at `phase-15@2d13b02`; it replaces the seed-file-only QA path with a declarative `--cluster-spec` bootstrap facade.

sw-block/design/v3-phase-15-g9g3-cluster-spec-yaml-mini-plan.md

@@ -1,7 +1,7 @@
 # V3 Phase 15 G9G-3 - Cluster Spec YAML Facade Mini-Plan
 
 Date: 2026-05-03
-Status: implemented at `seaweed_block@4fc0842`; QA verification pending
+Status: CLOSED; merged to `phase-15@2d13b02` after QA verification on `seaweed_block@4fc0842`
 Branch target: `p15-g9g3/cluster-spec-yaml`
 Scope: declarative bootstrap YAML that feeds existing lifecycle/product-loop stores
 
@@ -69,6 +69,7 @@ placements:
 ## 6. Implementation Snapshot
 
 Close candidate: `seaweed_block@4fc0842`.
+Merged target: `phase-15@2d13b02`.
 
 Implemented:
 
@@ -84,6 +85,8 @@ go test ./cmd/blockvolume -run TestG9G_L2ProductLoopPublishesAssignmentToBlockvo
 go test ./core/lifecycle ./core/host/master ./core/authority ./cmd/blockmaster ./cmd/blockvolume -count=1
 ```
 
+QA signed: 2026-05-03.
+
 ## 5. Non-Claims
 
 - Not a full product API.

sw-block/design/v3-phase-15-pr-review-cadence.md

@@ -0,0 +1,47 @@
+# V3 Phase 15 PR / Review Cadence
+
+Date: 2026-05-03
+Status: active process note
+
+## Rule
+
+Use one PR per coherent gate or milestone, not one PR per small commit.
+
+## Why
+
+P15 now has many small TDD slices. Opening every slice as a PR causes review
+noise and burns CodeRabbit / reviewer attention on intermediate states that are
+not meaningful product checkpoints.
+
+## Cadence
+
+1. Work on a gate branch, e.g. `p15-g9g/blockmaster-product-loop`.
+2. Land small commits freely inside that branch:
+   - mini-plan / docs;
+   - red test;
+   - implementation;
+   - focused verification;
+   - close snapshot.
+3. Ask QA to verify the branch at a pinned commit.
+4. Open or update PR only when the branch has a coherent review target.
+5. Merge to `phase-15`.
+6. Draft PR `phase-15 -> main` remains the high-level integration visibility surface.
+
+## Exceptions
+
+Open an earlier PR if:
+
+- the change crosses an authority/protocol boundary and needs external review;
+- the branch is getting too large to review coherently;
+- CodeRabbit feedback is specifically needed before more work continues;
+- another developer needs the branch integrated into `phase-15`.
+
+## Current Application
+
+G9G used this cadence:
+
+- `p15-g9g/blockmaster-product-loop` accumulated product-loop slices through QA sign.
+- It merged once into `phase-15@2b90018`.
+- `p15-g9g3/cluster-spec-yaml` was a distinct usability follow-up and merged once into `phase-15@2d13b02`.
+
+This is the preferred pattern for the next P15 gates.