diff --git a/assistant/src/config/schemas/__tests__/memory-v2.test.ts b/assistant/src/config/schemas/__tests__/memory-v2.test.ts
index 5ca74e76bba..acdbc7dbb26 100644
--- a/assistant/src/config/schemas/__tests__/memory-v2.test.ts
+++ b/assistant/src/config/schemas/__tests__/memory-v2.test.ts
@@ -224,6 +224,11 @@ describe("MemoryV3ConfigSchema", () => {
       denseQuota: { activeDomain: 30, offDomain: 8 },
       lanes: { hot: true, sparse: true, dense: true, tree: true, edges: true },
       ks: [5, 10, 25, 50],
+      write: {
+        enabled: false,
+        consolidateIntervalMs: 3600000,
+        coactivation: false,
+      },
     });
   });
 
@@ -287,6 +292,30 @@ describe("MemoryV3ConfigSchema", () => {
   test("rejects non-number ks entries", () => {
     expect(() => MemoryV3ConfigSchema.parse({ ks: ["a"] })).toThrow();
   });
+
+  test("parses the write subtree to safe off defaults when omitted", () => {
+    const parsed = MemoryV3ConfigSchema.parse({});
+    expect(parsed.write).toEqual({
+      enabled: false,
+      consolidateIntervalMs: 3600000,
+      coactivation: false,
+    });
+  });
+
+  test("accepts a partial write override and defaults the rest", () => {
+    const parsed = MemoryV3ConfigSchema.parse({ write: { enabled: true } });
+    expect(parsed.write).toEqual({
+      enabled: true,
+      consolidateIntervalMs: 3600000,
+      coactivation: false,
+    });
+  });
+
+  test("rejects a non-integer write.consolidateIntervalMs", () => {
+    expect(() =>
+      MemoryV3ConfigSchema.parse({ write: { consolidateIntervalMs: 1.5 } }),
+    ).toThrow();
+  });
 });
 
 describe("MemoryConfigSchema integration with v3 block", () => {
@@ -298,6 +327,11 @@ describe("MemoryConfigSchema integration with v3 block", () => {
     expect(parsed.v3.passCap).toBe(3);
     expect(parsed.v3.lanes.dense).toBe(true);
     expect(parsed.v3.ks).toEqual([5, 10, 25, 50]);
+    expect(parsed.v3.write).toEqual({
+      enabled: false,
+      consolidateIntervalMs: 3600000,
+      coactivation: false,
+    });
   });
 
   test("leaves pre-existing configs (no v3 key) otherwise unchanged", () => {
diff --git a/assistant/src/config/schemas/memory-v2.ts b/assistant/src/config/schemas/memory-v2.ts
index 11360a89e31..433267cc05e 100644
--- a/assistant/src/config/schemas/memory-v2.ts
+++ b/assistant/src/config/schemas/memory-v2.ts
@@ -491,6 +491,38 @@ export const MemoryV3ConfigSchema = z
       .describe(
         "Evaluation top-K cutoffs the v3 loop reports metrics at (e.g. recall@K).",
       ),
+    write: z
+      .object({
+        enabled: z
+          .boolean({ error: "memory.v3.write.enabled must be a boolean" })
+          .default(false)
+          .describe(
+            "Whether v3 consolidation owns the shared-buffer drain + tree build. Off by default — v2 consolidation stays the sole buffer-drainer. Does NOT introduce a separate buffer.",
+          ),
+        consolidateIntervalMs: z
+          .number({
+            error: "memory.v3.write.consolidateIntervalMs must be a number",
+          })
+          .int("memory.v3.write.consolidateIntervalMs must be an integer")
+          .default(3600000)
+          .describe(
+            "Interval, in milliseconds, between scheduled v3 consolidation runs once the v3 write path owns the drain. Default 1 hour.",
+          ),
+        coactivation: z
+          .boolean({ error: "memory.v3.write.coactivation must be a boolean" })
+          .default(false)
+          .describe(
+            "Whether v3 consolidation learns co-activation edges during the tree build. Off by default; consumed by a later PR.",
+          ),
+      })
+      .default({
+        enabled: false,
+        consolidateIntervalMs: 3600000,
+        coactivation: false,
+      })
+      .describe(
+        "Memory v3 write-path configuration. All default-off scaffolding — controls whether v3 consolidation owns the shared-buffer drain + tree build. Consumed by later PRs.",
+      ),
   })
   .default({
     enabled: false,
@@ -501,6 +533,11 @@ export const MemoryV3ConfigSchema = z
     denseQuota: { activeDomain: 30, offDomain: 8 },
     lanes: { hot: true, sparse: true, dense: true, tree: true, edges: true },
     ks: [5, 10, 25, 50],
+    write: {
+      enabled: false,
+      consolidateIntervalMs: 3600000,
+      coactivation: false,
+    },
   })
   .describe(
     "Memory v3 — multi-lane bounded-descent retrieval. Additive scaffolding, disabled by default.",
diff --git a/assistant/src/memory/__tests__/jobs-store-job-classes.test.ts b/assistant/src/memory/__tests__/jobs-store-job-classes.test.ts
index 7950e93758b..09fc33779b9 100644
--- a/assistant/src/memory/__tests__/jobs-store-job-classes.test.ts
+++ b/assistant/src/memory/__tests__/jobs-store-job-classes.test.ts
@@ -1,6 +1,24 @@
 import { describe, expect, test } from "bun:test";
 
-import { EMBED_JOB_TYPES, SLOW_LLM_JOB_TYPES } from "../jobs-store.js";
+import {
+  EMBED_JOB_TYPES,
+  type MemoryJobType,
+  SLOW_LLM_JOB_TYPES,
+} from "../jobs-store.js";
+
+describe("memory v3 job types", () => {
+  test("the v3 job-type literals are members of MemoryJobType", () => {
+    // Compile-time assignability is enforced by `tsc --noEmit`; the runtime
+    // assertion keeps the literals visible to the test runner. These types are
+    // inert scaffolding until their handlers land in later PRs.
+    const v3JobTypes: MemoryJobType[] = [
+      "memory_v3_consolidate",
+      "memory_v3_index_maintenance",
+      "memory_v3_edge_learning",
+    ];
+    expect(new Set(v3JobTypes).size).toBe(3);
+  });
+});
 
 describe("memory job classes", () => {
   test("EMBED_JOB_TYPES and SLOW_LLM_JOB_TYPES are disjoint", () => {
diff --git a/assistant/src/memory/jobs-store.ts b/assistant/src/memory/jobs-store.ts
index 930f20cdad6..fd672f75e88 100644
--- a/assistant/src/memory/jobs-store.ts
+++ b/assistant/src/memory/jobs-store.ts
@@ -44,6 +44,9 @@ export type MemoryJobType =
   | "memory_v2_migrate"
   | "memory_v2_reembed"
   | "memory_v2_activation_recompute"
+  | "memory_v3_consolidate"
+  | "memory_v3_index_maintenance"
+  | "memory_v3_edge_learning"
   | "memory_retrospective";
 
 export const EMBED_JOB_TYPES: MemoryJobType[] = [