diff --git a/memory-bank/change-log.md b/memory-bank/change-log.md
index 7ae4628d..cf8423d9 100644
--- a/memory-bank/change-log.md
+++ b/memory-bank/change-log.md
@@ -2019,3 +2019,33 @@ Validation:
 Follow-ups:
 
 - Optional next bounded slice: add a focused test (or integration harness assertion) around `downloadBlob` service return contract to prevent regression to response-object assumptions.
+
+---
+
+### CL-057: TASK22260 next slice — phase7 behavioural harness compatibility update
+
+date: 2026-03-25
+author: Cline
+scope: `tests/phase7/service-behaviour.test.cjs`
+type: change
+rationale: After service-layer client migration (`getJson`/`requestJson`/`buildHashedQueryUrl`), phase7 behavioural harness still assumed direct axios imports only; update harness defaults so legacy behavior assertions remain executable.
+impact: Restores service behavioural regression coverage (12/12) without changing production runtime code.
+status: completed
+
+Summary:
+
+- Enhanced phase7 VM loader default injections for migrated service helpers:
+    - added default `getJson(...)` mock delegating to `axios.get(...).then(res.data)`
+    - added default `requestJson(...)` mock delegating to `axios(config).then(res.data)`
+    - added default `buildHashedQueryUrl(...)` mock resolving hash via `/api/endpoint/gethash_api` compatibility path
+- Updated notify behavior assertions to align with shared request client usage (`requestJson` invokes axios config-style call):
+    - switched notify test handlers from `axios.postHandler` to `axios.requestHandler`
+    - assertions now inspect `axios.calls[0].config.{url,method,data}`
+
+Validation:
+
+- `node tests/phase7/service-behaviour.test.cjs` -> pass (12/12)
+
+Follow-ups:
+
+- Optional next bounded slice: add a small shared test utility for service harness client mocks to reduce future per-file drift as façade migration continues.
diff --git a/tests/phase7/service-behaviour.test.cjs b/tests/phase7/service-behaviour.test.cjs
index 305ac424..e5bb54ca 100644
--- a/tests/phase7/service-behaviour.test.cjs
+++ b/tests/phase7/service-behaviour.test.cjs
@@ -72,6 +72,38 @@ const loadServiceModule = (fileName, injected = {}) => {
     source = source.replace(/export const\s+/g, "const ");
     source += `\nmodule.exports = { ${exportNames.join(", ")} };\n`;
 
+    const defaultGetJson = (url, config) => {
+        if (!injected.axios || !injected.axios.get) {
+            throw new Error("Missing axios.get for default getJson mock");
+        }
+
+        return injected.axios
+            .get(url, config)
+            .then((response) => response.data);
+    };
+
+    const defaultRequestJson = (config) => {
+        if (!injected.axios) {
+            throw new Error("Missing axios for default requestJson mock");
+        }
+
+        return injected.axios(config).then((response) => response.data);
+    };
+
+    const defaultBuildHashedQueryUrl = async (queryUrl) => {
+        if (!injected.axios || !injected.axios.get) {
+            throw new Error(
+                "Missing axios.get for default buildHashedQueryUrl mock"
+            );
+        }
+
+        const hashResponse = await injected.axios.get(
+            "/api/endpoint/gethash_api?path=" + encodeURIComponent(queryUrl)
+        );
+
+        return queryUrl + hashResponse.data.hash;
+    };
+
     const context = {
         module: { exports: {} },
         exports: {},
@@ -85,6 +117,10 @@ const loadServiceModule = (fileName, injected = {}) => {
             warn: () => {},
             error: () => {}
         },
+        getJson: injected.getJson || defaultGetJson,
+        requestJson: injected.requestJson || defaultRequestJson,
+        buildHashedQueryUrl:
+            injected.buildHashedQueryUrl || defaultBuildHashedQueryUrl,
         ...injected
     };
 
@@ -367,7 +403,7 @@ test("notify/sendEmail posts payload and returns response data", async () => {
     const axios = createAxiosMock();
     const logger = createLoggerMock();
 
-    axios.postHandler = async () => ({ data: { id: "msg-1" } });
+    axios.requestHandler = async () => ({ data: { id: "msg-1" } });
 
     const notify = loadServiceModule("notifyDirectService.js", {
         axios,
@@ -382,8 +418,9 @@ test("notify/sendEmail posts payload and returns response data", async () => {
     );
 
     assert.deepStrictEqual(normalize(result), { id: "msg-1" });
-    assert.strictEqual(axios.calls[0].url, "/api/email/notify");
-    assert.deepStrictEqual(normalize(axios.calls[0].data), {
+    assert.strictEqual(axios.calls[0].config.url, "/api/email/notify");
+    assert.strictEqual(axios.calls[0].config.method, "post");
+    assert.deepStrictEqual(normalize(axios.calls[0].config.data), {
         templateId: "template-1",
         emailAddress: "person@example.com",
         reference: "ref-123",
@@ -396,7 +433,7 @@ test("notify/sendEmail logs and rethrows on failure", async () => {
     const logger = createLoggerMock();
     const error = createAxiosError(429, "Too Many Requests");
 
-    axios.postHandler = async () => Promise.reject(error);
+    axios.requestHandler = async () => Promise.reject(error);
 
     const notify = loadServiceModule("notifyDirectService.js", {
         axios,