diff --git a/README.md b/README.md
index 013954e5..aee7644d 100644
--- a/README.md
+++ b/README.md
@@ -67,6 +67,8 @@ start with the maintained
 [`CultMesh And Eve Getting Started`](src/GameCult.Mesh/docs/getting-started/README.md)
 series. Its first executable package-consumer checkpoint is
 [`samples/eve-two-runtime`](samples/eve-two-runtime/README.md).
+The missing real-browser/network boundary is mapped explicitly in
+[`browser-verse-transport.md`](src/GameCult.Mesh/docs/browser-verse-transport.md).
 
 If you want only the smallest durable "open node -> put typed doc -> get typed doc"
 path, use
diff --git a/packages/cultnet-ts/contracts/cultnet.database-change-raw.schema.json b/packages/cultnet-ts/contracts/cultnet.database-change-raw.schema.json
new file mode 100644
index 00000000..9bedb72a
--- /dev/null
+++ b/packages/cultnet-ts/contracts/cultnet.database-change-raw.schema.json
@@ -0,0 +1,25 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "https://github.com/GameCult/cultnet-ts/contracts/cultnet.database-change-raw.schema.json",
+  "title": "CultNet Raw Database Change Message",
+  "type": "object",
+  "required": ["schemaVersion", "messageId", "subscriptionId", "changeKind"],
+  "additionalProperties": false,
+  "properties": {
+    "schemaVersion": { "const": "cultnet.database_change_raw.v0" },
+    "messageId": { "type": "string", "minLength": 1 },
+    "subscriptionId": { "type": "string", "minLength": 1 },
+    "changeKind": { "enum": ["added", "updated", "removed"] },
+    "document": { "$ref": "./cultnet.raw-document-record.schema.json" },
+    "recordKey": { "type": "string", "minLength": 1 },
+    "schemaId": { "type": "string", "minLength": 1 }
+  },
+  "allOf": [
+    {
+      "if": { "properties": { "changeKind": { "const": "removed" } } },
+      "then": { "required": ["recordKey", "schemaId"] },
+      "else": { "required": ["document"] }
+    }
+  ]
+}
+
diff --git a/packages/cultnet-ts/contracts/cultnet.database-subscribe.schema.json b/packages/cultnet-ts/contracts/cultnet.database-subscribe.schema.json
new file mode 100644
index 00000000..d4b65fcc
--- /dev/null
+++ b/packages/cultnet-ts/contracts/cultnet.database-subscribe.schema.json
@@ -0,0 +1,20 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "https://github.com/GameCult/cultnet-ts/contracts/cultnet.database-subscribe.schema.json",
+  "title": "CultNet Database Subscribe Message",
+  "type": "object",
+  "required": ["schemaVersion", "messageId", "subscriptionId", "includeSnapshot"],
+  "additionalProperties": false,
+  "properties": {
+    "schemaVersion": { "const": "cultnet.database_subscribe.v0" },
+    "messageId": { "type": "string", "minLength": 1 },
+    "subscriptionId": { "type": "string", "minLength": 1 },
+    "schemaIds": { "type": "array", "items": { "type": "string", "minLength": 1 } },
+    "recordKeys": { "type": "array", "items": { "type": "string", "minLength": 1 } },
+    "includeSnapshot": { "type": "boolean" },
+    "consumerRuntimeId": { "type": "string", "minLength": 1 },
+    "bodyIds": { "type": "array", "items": { "type": "string", "minLength": 1 } },
+    "supportedBodyTransports": { "type": "array", "items": { "type": "string", "minLength": 1 } }
+  }
+}
+
diff --git a/packages/cultnet-ts/contracts/cultnet.database-unsubscribe.schema.json b/packages/cultnet-ts/contracts/cultnet.database-unsubscribe.schema.json
new file mode 100644
index 00000000..04be3799
--- /dev/null
+++ b/packages/cultnet-ts/contracts/cultnet.database-unsubscribe.schema.json
@@ -0,0 +1,14 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "https://github.com/GameCult/cultnet-ts/contracts/cultnet.database-unsubscribe.schema.json",
+  "title": "CultNet Database Unsubscribe Message",
+  "type": "object",
+  "required": ["schemaVersion", "messageId", "subscriptionId"],
+  "additionalProperties": false,
+  "properties": {
+    "schemaVersion": { "const": "cultnet.database_unsubscribe.v0" },
+    "messageId": { "type": "string", "minLength": 1 },
+    "subscriptionId": { "type": "string", "minLength": 1 }
+  }
+}
+
diff --git a/packages/cultnet-ts/src/contracts.ts b/packages/cultnet-ts/src/contracts.ts
index 8795b06a..56ece383 100644
--- a/packages/cultnet-ts/src/contracts.ts
+++ b/packages/cultnet-ts/src/contracts.ts
@@ -18,6 +18,9 @@ import transportProfileSchema from "../contracts/cultnet.transport-profile.schem
 import snapshotRequestSchema from "../contracts/cultnet.snapshot-request.schema.json";
 import snapshotResponseSchema from "../contracts/cultnet.snapshot-response.schema.json";
 import snapshotResponseRawSchema from "../contracts/cultnet.snapshot-response-raw.schema.json";
+import databaseSubscribeSchema from "../contracts/cultnet.database-subscribe.schema.json";
+import databaseUnsubscribeSchema from "../contracts/cultnet.database-unsubscribe.schema.json";
+import databaseChangeRawSchema from "../contracts/cultnet.database-change-raw.schema.json";
 import schemaDescriptorSchema from "../contracts/cultnet.schema-descriptor.schema.json";
 import schemaCatalogRequestSchema from "../contracts/cultnet.schema-catalog-request.schema.json";
 import schemaCatalogResponseSchema from "../contracts/cultnet.schema-catalog-response.schema.json";
@@ -44,6 +47,9 @@ export type CultNetSchemaVersion =
   | "cultnet.snapshot_request.v0"
   | "cultnet.snapshot_response.v0"
   | "cultnet.snapshot_response_raw.v0"
+  | "cultnet.database_subscribe.v0"
+  | "cultnet.database_unsubscribe.v0"
+  | "cultnet.database_change_raw.v0"
   | "cultnet.schema_catalog_request.v0"
   | "cultnet.schema_catalog_response.v0"
   | "cultnet.shard_catalog_request.v0"
@@ -217,6 +223,34 @@ export interface CultNetSnapshotResponseRawMessage {
   documents: CultNetRawDocumentRecord[];
 }
 
+export interface CultNetDatabaseSubscribeMessage {
+  schemaVersion: "cultnet.database_subscribe.v0";
+  messageId: string;
+  subscriptionId: string;
+  schemaIds?: string[];
+  recordKeys?: string[];
+  includeSnapshot: boolean;
+  consumerRuntimeId?: string;
+  bodyIds?: string[];
+  supportedBodyTransports?: string[];
+}
+
+export interface CultNetDatabaseUnsubscribeMessage {
+  schemaVersion: "cultnet.database_unsubscribe.v0";
+  messageId: string;
+  subscriptionId: string;
+}
+
+export interface CultNetDatabaseChangeRawMessage {
+  schemaVersion: "cultnet.database_change_raw.v0";
+  messageId: string;
+  subscriptionId: string;
+  changeKind: "added" | "updated" | "removed";
+  document?: CultNetRawDocumentRecord;
+  recordKey?: string;
+  schemaId?: string;
+}
+
 export interface CultNetSchemaDescriptor {
   schemaId: string;
   kind: CultNetSchemaKind;
@@ -535,6 +569,9 @@ export type CultNetMessage =
   | CultNetSnapshotRequestMessage
   | CultNetSnapshotResponseMessage
   | CultNetSnapshotResponseRawMessage
+  | CultNetDatabaseSubscribeMessage
+  | CultNetDatabaseUnsubscribeMessage
+  | CultNetDatabaseChangeRawMessage
   | CultNetSchemaCatalogRequestMessage
   | CultNetSchemaCatalogResponseMessage
   | CultNetShardCatalogRequestMessage
@@ -562,6 +599,9 @@ const CULTNET_MESSAGE_SCHEMAS = [
   snapshotRequestSchema,
   snapshotResponseSchema,
   snapshotResponseRawSchema,
+  databaseSubscribeSchema,
+  databaseUnsubscribeSchema,
+  databaseChangeRawSchema,
   schemaCatalogRequestSchema,
   schemaCatalogResponseSchema,
   shardCatalogRequestSchema,
@@ -620,6 +660,11 @@ export function parseCultNetMessage(input: unknown, wireContract: CultNetWireCon
     return input as CultNetSnapshotResponseRawMessage;
   }
 
+  if (schemaVersion === "cultnet.database_change_raw.v0") {
+    validateDatabaseChangeRawMessage(input);
+    return input as CultNetDatabaseChangeRawMessage;
+  }
+
   if (!validator(input)) {
     const keys = Object.keys(input as Record<string, unknown>).join(",");
     throw new Error(`${renderValidationErrors(schemaVersion, validator)}; keys=${keys}`);
@@ -951,9 +996,39 @@ function validateSnapshotResponseRawMessage(
   });
 }
 
+function validateDatabaseChangeRawMessage(
+  input: unknown,
+): asserts input is CultNetDatabaseChangeRawMessage {
+  const candidate = validateBinaryMessageRoot(input, "cultnet.database_change_raw.v0");
+  requireNonEmptyString(candidate.subscriptionId, "/subscriptionId");
+  if (candidate.changeKind !== "added" &&
+      candidate.changeKind !== "updated" &&
+      candidate.changeKind !== "removed") {
+    throw new Error(
+      "Validation failed for cultnet.database_change_raw.v0: /changeKind: must be added, updated, or removed",
+    );
+  }
+
+  if (candidate.changeKind === "removed") {
+    requireNonEmptyString(candidate.recordKey, "/recordKey");
+    requireNonEmptyString(candidate.schemaId, "/schemaId");
+    return;
+  }
+
+  if (!("document" in candidate)) {
+    throw new Error(
+      "Validation failed for cultnet.database_change_raw.v0: /document: is required for added or updated changes",
+    );
+  }
+  validateRawDocumentRecord(candidate.document, "/document");
+}
+
 function validateBinaryMessageRoot(
   input: unknown,
-  schemaVersion: "cultnet.document_put_raw.v0" | "cultnet.snapshot_response_raw.v0",
+  schemaVersion:
+    | "cultnet.document_put_raw.v0"
+    | "cultnet.snapshot_response_raw.v0"
+    | "cultnet.database_change_raw.v0",
 ): Record<string, unknown> {
   if (!input || typeof input !== "object") {
     throw new Error(`Validation failed for ${schemaVersion}: /: must be an object`);
@@ -1043,6 +1118,15 @@ function normalizeCultNetOptionalNulls(
       acceptLegacyPropertyName(candidate, "ShardEpoch", "shardEpoch");
       stripNullProperties(candidate, ["schemaIds", "recordKeys", "shardId", "shardEpoch"]);
       return;
+    case "cultnet.database_subscribe.v0":
+      stripNullProperties(candidate, [
+        "schemaIds",
+        "recordKeys",
+        "consumerRuntimeId",
+        "bodyIds",
+        "supportedBodyTransports",
+      ]);
+      return;
     case "cultnet.schema_catalog_request.v0":
       stripNullProperties(candidate, ["schemaIds", "kinds"]);
       return;
@@ -1092,6 +1176,9 @@ export const cultNetSchemas = {
   snapshotRequestSchema,
   snapshotResponseSchema,
   snapshotResponseRawSchema,
+  databaseSubscribeSchema,
+  databaseUnsubscribeSchema,
+  databaseChangeRawSchema,
   schemaDescriptorSchema,
   schemaCatalogRequestSchema,
   schemaCatalogResponseSchema,
diff --git a/packages/cultnet-ts/src/index.ts b/packages/cultnet-ts/src/index.ts
index cd602952..64d9c2fd 100644
--- a/packages/cultnet-ts/src/index.ts
+++ b/packages/cultnet-ts/src/index.ts
@@ -8,6 +8,9 @@ export {
   type CultNetDocumentPutMessage,
   type CultNetDocumentPutRawMessage,
   type CultNetDocumentRecord,
+  type CultNetDatabaseSubscribeMessage,
+  type CultNetDatabaseUnsubscribeMessage,
+  type CultNetDatabaseChangeRawMessage,
   type CultNetRawDocumentRecord,
   type CultNetRawPayloadEncoding,
   type CultNetErrorMessage,
diff --git a/packages/cultnet-ts/test/cultnet.test.ts b/packages/cultnet-ts/test/cultnet.test.ts
index 46e7cb6f..1a2ba805 100644
--- a/packages/cultnet-ts/test/cultnet.test.ts
+++ b/packages/cultnet-ts/test/cultnet.test.ts
@@ -1261,6 +1261,64 @@ test("operation envelopes preserve typed service routing and payload correlation
   assert.equal(response.messageId, request.messageId);
 });
 
+test("database subscription contracts match the C# live document lane", () => {
+  const subscribe = parseCultNetMessage({
+    schemaVersion: "cultnet.database_subscribe.v0",
+    messageId: "subscribe-counter",
+    subscriptionId: "counter:browser-1",
+    schemaIds: ["sample.counter_state.v1"],
+    recordKeys: ["counter:main"],
+    includeSnapshot: true,
+    consumerRuntimeId: "browser-1",
+  });
+  assert.equal(subscribe.schemaVersion, "cultnet.database_subscribe.v0");
+  assert.equal(subscribe.subscriptionId, "counter:browser-1");
+
+  const added = parseCultNetMessage({
+    schemaVersion: "cultnet.database_change_raw.v0",
+    messageId: "change-counter-1",
+    subscriptionId: "counter:browser-1",
+    changeKind: "added",
+    document: {
+      schemaId: "sample.counter_state.v1",
+      recordKey: "counter:main",
+      storedAt: "2026-08-17T00:00:00Z",
+      payloadEncoding: "messagepack",
+      payload: new Uint8Array([0x81, 0xa5, 0x63, 0x6f, 0x75, 0x6e, 0x74, 0x01]),
+    },
+  });
+  assert.equal(added.schemaVersion, "cultnet.database_change_raw.v0");
+  assert.equal(added.document?.recordKey, "counter:main");
+
+  const removed = parseCultNetMessage({
+    schemaVersion: "cultnet.database_change_raw.v0",
+    messageId: "change-counter-2",
+    subscriptionId: "counter:browser-1",
+    changeKind: "removed",
+    recordKey: "counter:main",
+    schemaId: "sample.counter_state.v1",
+  });
+  assert.equal(removed.schemaVersion, "cultnet.database_change_raw.v0");
+  assert.equal(removed.recordKey, "counter:main");
+
+  const unsubscribe = parseCultNetMessage({
+    schemaVersion: "cultnet.database_unsubscribe.v0",
+    messageId: "unsubscribe-counter",
+    subscriptionId: "counter:browser-1",
+  });
+  assert.equal(unsubscribe.schemaVersion, "cultnet.database_unsubscribe.v0");
+
+  assert.throws(
+    () => parseCultNetMessage({
+      schemaVersion: "cultnet.database_change_raw.v0",
+      messageId: "invalid-change",
+      subscriptionId: "counter:browser-1",
+      changeKind: "updated",
+    }),
+    /document: is required/,
+  );
+});
+
 test("RUDP operation service correlates typed payload envelopes", async () => {
   const server = await startCultNetOperationServer({
     runtimeId: "sai-sidecar",
diff --git a/src/GameCult.Mesh/docs/browser-verse-transport.md b/src/GameCult.Mesh/docs/browser-verse-transport.md
new file mode 100644
index 00000000..c8586021
--- /dev/null
+++ b/src/GameCult.Mesh/docs/browser-verse-transport.md
@@ -0,0 +1,156 @@
+# Browser Verse Transport Boundary
+
+Date: 2026-08-17
+
+## Status
+
+This is the implementation map for the missing real-browser checkpoint. The
+current `samples/eve-two-runtime` proof uses jsdom and one local TypeScript
+CultMesh node. It is a clean package-consumer and contract-validation proof,
+not browser networking.
+
+The current substrate is incomplete:
+
+- `cultmesh-ts` is a Node package and imports `node:dgram` at its root;
+- `cultnet-ts` mixes browser-safe schema contracts with Node transport,
+  filesystem, crypto, stream, and UDP modules;
+- C# and TypeScript now share `cultnet.database_subscribe.v0`,
+  `cultnet.database_unsubscribe.v0`, and `cultnet.database_change_raw.v0`;
+  the browser-safe transport package that consumes them does not exist yet;
+- Kotlin has a channel-aware WebSocket transport adapter; C# and TypeScript do
+  not expose the equivalent browser/server pair;
+- Hermodr can lower Odin state into a browser, but it is an infrastructure
+  runtime, not the missing clean-consumer game API.
+
+## Authority Map
+
+Owner:
+
+- CultNet owns binary WebSocket framing and schema-v0 message validation.
+- CultMesh owns stable Verse/provider identity, document leases,
+  subscriptions, route replacement, and command/receipt correlation.
+- Odin owns discovery of the current `wss://` candidate for a stable Verse and
+  provider identity.
+- The provider daemon owns application state, operations, receipts, and the Eve
+  surface.
+- Eve owns surface and command contracts; the browser lowerer owns DOM only.
+
+Inputs:
+
+- an Odin-discovered WebSocket transport candidate;
+- stable Verse and provider identities;
+- authenticated session evidence;
+- requested schema ids and record keys;
+- typed operation invocations and idempotency keys;
+- canonical CultNet schema-v0 MessagePack messages.
+
+Outputs:
+
+- leased typed document snapshots and live changes;
+- typed operation receipts;
+- explicit connection/session diagnostics;
+- deterministic unsubscribe and disposal;
+- route replacement without changing provider or document identity.
+
+Derived state:
+
+- browser caches, DOM trees, loading/error presentation, and optimistic visual
+  affordances are projections only;
+- a socket URL is a disposable discovery candidate, never provider identity;
+- reconnect status is observable session state, not application truth.
+
+Forbidden writers:
+
+- browser lowerers cannot mutate provider documents directly;
+- Hermodr, service workers, renderer caches, and app-specific HTTP endpoints
+  cannot become alternate gameplay authorities;
+- no JSON polling API may mirror the database as a second state system;
+- `node:dgram`, Node streams, filesystem stores, and Node crypto cannot enter a
+  browser bundle;
+- a late socket, stale subscription generation, or reconnect replay cannot
+  overwrite a newer session;
+- application code cannot own reconnect sleeps, endpoint ranking, or
+  resubscription loops.
+
+Shared paths:
+
+- initial load, live update, reconnect, tab background/resume, command retry,
+  and provider route rotation all use one CultMesh document-lease/session path;
+- browser, Unity, headless C#, and future native clients consume the same
+  provider-owned documents and receipts;
+- every command crosses the same typed operation boundary regardless of which
+  Eve lowerer emitted it.
+
+Deletion line:
+
+- stop calling jsdom a browser runtime;
+- split browser-safe CultNet contracts from the Node transport package;
+- add the missing subscription messages to the shared generated contract
+  catalog instead of retyping them in a browser adapter;
+- do not retain a sample-only WebSocket protocol after the canonical adapter
+  exists.
+
+## Required Runtime Shape
+
+The browser-facing package must be importable by a standards-mode browser or a
+normal bundler without Node polyfills. It exposes a narrow API shaped like:
+
+```ts
+const mesh = await CultMeshBrowser.connect({
+  rendezvous: odin,
+  verseId: "sample.counter",
+  providerId: "sample.counter-provider",
+});
+
+using surface = await mesh.leaseDocument(eveSurface, "eve:surface:counter");
+surface.watch(render);
+
+const receipt = await mesh.invoke(incrementCounter, {}, {
+  idempotencyKey: crypto.randomUUID(),
+});
+```
+
+The names are illustrative. The ownership is not: application code supplies
+identity and intent; CultMesh owns route/session continuity; the provider owns
+the result.
+
+## Wire Contract
+
+WebSocket carries binary MessagePack CultNet schema-v0 messages. The first
+implementation must support:
+
+- `cultnet.hello.v0`;
+- authentication/session verification;
+- `cultnet.snapshot_request.v0` and
+  `cultnet.snapshot_response_raw.v0`;
+- `cultnet.database_subscribe.v0`,
+  `cultnet.database_unsubscribe.v0`, and
+  `cultnet.database_change_raw.v0`;
+- `cultnet.operation_request.v0` and
+  `cultnet.operation_response.v0`;
+- `cultnet.error.v0`.
+
+The WebSocket frame is a transport body, not a second message schema. Payload
+size, queue depth, subscription count, and command rate are bounded. Schema,
+identity, authority, and idempotency validation happen before provider code.
+
+## Acceptance Gate
+
+From an empty temporary consumer using packed/released artifacts only:
+
+1. start a provider daemon with one durable counter document and one validated
+   Eve surface;
+2. advertise it by stable identity through a local Odin fixture or real Odin;
+3. connect one real Chromium page and one C# headless client;
+4. lease the same surface and counter document in both runtimes;
+5. click the browser button and require one provider-authored canonical receipt;
+6. observe the same state version and receipt id in both clients;
+7. disconnect or rotate the physical WebSocket endpoint, then require both
+   leases to resume without application reconnect code;
+8. restart the provider and prove state plus receipt persistence;
+9. reject malformed schemas, direct document writes, duplicate command
+   effects, stale subscription generations, and unsupported authority;
+10. inspect the browser bundle and fail if it contains Node builtin imports.
+
+The gate runs on Windows and Linux. A screenshot is useful presentation
+evidence, but the receipt/state chronology is the authority proof.
diff --git a/src/GameCult.Mesh/docs/getting-started/03-publish-an-eve-surface.md b/src/GameCult.Mesh/docs/getting-started/03-publish-an-eve-surface.md
index d28ef621..d16f21c1 100644
--- a/src/GameCult.Mesh/docs/getting-started/03-publish-an-eve-surface.md
+++ b/src/GameCult.Mesh/docs/getting-started/03-publish-an-eve-surface.md
@@ -65,5 +65,7 @@ This checkpoint proves clean package consumption, canonical Eve contract
 validation, and two independent lowering/observation consumers inside Node. It
 does **not** claim a real browser process, an Odin-discovered network hop, or
 cross-language command execution. Those are the next public Verse conformance
-gates; do not cite this sample as evidence that they exist.
+gates; do not cite this sample as evidence that they exist. Their owner map and
+executable acceptance contract are recorded in
+[`browser-verse-transport.md`](../browser-verse-transport.md).
 
diff --git a/src/GameCult.Networking/Contracts/cultnet.database-change-raw.schema.json b/src/GameCult.Networking/Contracts/cultnet.database-change-raw.schema.json
new file mode 100644
index 00000000..9bedb72a
--- /dev/null
+++ b/src/GameCult.Networking/Contracts/cultnet.database-change-raw.schema.json
@@ -0,0 +1,25 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "https://github.com/GameCult/cultnet-ts/contracts/cultnet.database-change-raw.schema.json",
+  "title": "CultNet Raw Database Change Message",
+  "type": "object",
+  "required": ["schemaVersion", "messageId", "subscriptionId", "changeKind"],
+  "additionalProperties": false,
+  "properties": {
+    "schemaVersion": { "const": "cultnet.database_change_raw.v0" },
+    "messageId": { "type": "string", "minLength": 1 },
+    "subscriptionId": { "type": "string", "minLength": 1 },
+    "changeKind": { "enum": ["added", "updated", "removed"] },
+    "document": { "$ref": "./cultnet.raw-document-record.schema.json" },
+    "recordKey": { "type": "string", "minLength": 1 },
+    "schemaId": { "type": "string", "minLength": 1 }
+  },
+  "allOf": [
+    {
+      "if": { "properties": { "changeKind": { "const": "removed" } } },
+      "then": { "required": ["recordKey", "schemaId"] },
+      "else": { "required": ["document"] }
+    }
+  ]
+}
+
diff --git a/src/GameCult.Networking/Contracts/cultnet.database-subscribe.schema.json b/src/GameCult.Networking/Contracts/cultnet.database-subscribe.schema.json
new file mode 100644
index 00000000..d4b65fcc
--- /dev/null
+++ b/src/GameCult.Networking/Contracts/cultnet.database-subscribe.schema.json
@@ -0,0 +1,20 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "https://github.com/GameCult/cultnet-ts/contracts/cultnet.database-subscribe.schema.json",
+  "title": "CultNet Database Subscribe Message",
+  "type": "object",
+  "required": ["schemaVersion", "messageId", "subscriptionId", "includeSnapshot"],
+  "additionalProperties": false,
+  "properties": {
+    "schemaVersion": { "const": "cultnet.database_subscribe.v0" },
+    "messageId": { "type": "string", "minLength": 1 },
+    "subscriptionId": { "type": "string", "minLength": 1 },
+    "schemaIds": { "type": "array", "items": { "type": "string", "minLength": 1 } },
+    "recordKeys": { "type": "array", "items": { "type": "string", "minLength": 1 } },
+    "includeSnapshot": { "type": "boolean" },
+    "consumerRuntimeId": { "type": "string", "minLength": 1 },
+    "bodyIds": { "type": "array", "items": { "type": "string", "minLength": 1 } },
+    "supportedBodyTransports": { "type": "array", "items": { "type": "string", "minLength": 1 } }
+  }
+}
+
diff --git a/src/GameCult.Networking/Contracts/cultnet.database-unsubscribe.schema.json b/src/GameCult.Networking/Contracts/cultnet.database-unsubscribe.schema.json
new file mode 100644
index 00000000..04be3799
--- /dev/null
+++ b/src/GameCult.Networking/Contracts/cultnet.database-unsubscribe.schema.json
@@ -0,0 +1,14 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "https://github.com/GameCult/cultnet-ts/contracts/cultnet.database-unsubscribe.schema.json",
+  "title": "CultNet Database Unsubscribe Message",
+  "type": "object",
+  "required": ["schemaVersion", "messageId", "subscriptionId"],
+  "additionalProperties": false,
+  "properties": {
+    "schemaVersion": { "const": "cultnet.database_unsubscribe.v0" },
+    "messageId": { "type": "string", "minLength": 1 },
+    "subscriptionId": { "type": "string", "minLength": 1 }
+  }
+}
+
diff --git a/src/GameCult.Networking/CultNetSchemaRegistry.cs b/src/GameCult.Networking/CultNetSchemaRegistry.cs
index 037c0d84..4fc68a13 100644
--- a/src/GameCult.Networking/CultNetSchemaRegistry.cs
+++ b/src/GameCult.Networking/CultNetSchemaRegistry.cs
@@ -370,6 +370,27 @@ namespace GameCult.Networking
                 WireContracts = new[] { CultNetWireContracts.SchemaV0 }
             },
             new SchemaResourceSpec
+            {
+                FileName = "cultnet.database-subscribe.schema.json",
+                Kind = "wire_message",
+                SchemaVersion = CultNetSchemaVersions.DatabaseSubscribe,
+                WireContracts = new[] { CultNetWireContracts.SchemaV0 }
+            },
+            new SchemaResourceSpec
+            {
+                FileName = "cultnet.database-unsubscribe.schema.json",
+                Kind = "wire_message",
+                SchemaVersion = CultNetSchemaVersions.DatabaseUnsubscribe,
+                WireContracts = new[] { CultNetWireContracts.SchemaV0 }
+            },
+            new SchemaResourceSpec
+            {
+                FileName = "cultnet.database-change-raw.schema.json",
+                Kind = "wire_message",
+                SchemaVersion = CultNetSchemaVersions.DatabaseChangeRaw,
+                WireContracts = new[] { CultNetWireContracts.SchemaV0 }
+            },
+            new SchemaResourceSpec
             {
                 FileName = "cultnet.schema-descriptor.schema.json",
                 Kind = "shared_contract",
diff --git a/tests/GameCult.Networking.Tests/NetworkingTests.cs b/tests/GameCult.Networking.Tests/NetworkingTests.cs
index 9b1af662..44437cc3 100644
--- a/tests/GameCult.Networking.Tests/NetworkingTests.cs
+++ b/tests/GameCult.Networking.Tests/NetworkingTests.cs
@@ -5282,6 +5282,12 @@ namespace GameCult.Networking.Tests
                 schema => schema.SchemaVersion == CultNetSchemaVersions.DocumentPutRaw);
             var rawSnapshot = Array.Find(response.Schemas,
                 schema => schema.SchemaVersion == CultNetSchemaVersions.SnapshotResponseRaw);
+            var subscribe = Array.Find(response.Schemas,
+                schema => schema.SchemaVersion == CultNetSchemaVersions.DatabaseSubscribe);
+            var unsubscribe = Array.Find(response.Schemas,
+                schema => schema.SchemaVersion == CultNetSchemaVersions.DatabaseUnsubscribe);
+            var change = Array.Find(response.Schemas,
+                schema => schema.SchemaVersion == CultNetSchemaVersions.DatabaseChangeRaw);
             var ghostlight = Array.Find(response.Schemas,
                 schema => schema.SchemaVersion == "ghostlight.agent_state.v0");
             var transportProfile = Array.Find(response.Schemas,
@@ -5295,6 +5301,13 @@ namespace GameCult.Networking.Tests
             Assert.That(rawSnapshot, Is.Not.Null);
             Assert.That(rawSnapshot!.SchemaJson, Does.Contain("cultnet.snapshot_response_raw.v0"));
 
+            Assert.That(subscribe, Is.Not.Null);
+            Assert.That(subscribe!.SchemaJson, Does.Contain("cultnet.database_subscribe.v0"));
+            Assert.That(unsubscribe, Is.Not.Null);
+            Assert.That(unsubscribe!.SchemaJson, Does.Contain("cultnet.database_unsubscribe.v0"));
+            Assert.That(change, Is.Not.Null);
+            Assert.That(change!.SchemaJson, Does.Contain("cultnet.database_change_raw.v0"));
+
             Assert.That(ghostlight, Is.Not.Null);
             Assert.That(ghostlight!.DocumentType, Is.EqualTo("ghostlight.agent-state"));
             Assert.That(ghostlight.Kind, Is.EqualTo("document_payload"));