diff --git a/actions/services/caseDirectService.js b/actions/services/caseDirectService.js
index 0d84ab44..89e2bc9f 100644
--- a/actions/services/caseDirectService.js
+++ b/actions/services/caseDirectService.js
@@ -5,7 +5,7 @@ import { getJson, requestJson } from "../clients/endpointClient";
 import { buildFileQuery, withBaseUrl } from "../clients/fileRouteBuilder";
 
 export const getCaseMessage = (searchString) => {
-    const route = buildFileQuery("/api/endpoint/getcasemessage_api", {
+    const route = buildFileQuery("/api/cases/get-case-message", {
         id: searchString
     });
 
@@ -13,7 +13,7 @@ export const getCaseMessage = (searchString) => {
 };
 
 export const getIncidentbyID = (searchString) => {
-    const route = buildFileQuery("/api/endpoint/getincidentbyid_api", {
+    const route = buildFileQuery("/api/cases/get-incident-by-id", {
         searchString
     });
 
@@ -37,7 +37,7 @@ export const getPartSavedAppeal = (searchString) => {
 };
 
 export const getSIPSEvents = async (caseid) => {
-    const route = buildFileQuery("/api/endpoint/getsipsevents_api", {
+    const route = buildFileQuery("/api/cases/get-sips-events", {
         caseid
     });
 
@@ -45,7 +45,7 @@ export const getSIPSEvents = async (caseid) => {
 };
 
 export const getSIPSMedia = async (caseid) => {
-    const route = buildFileQuery("/api/endpoint/getsipsmedia_api", {
+    const route = buildFileQuery("/api/cases/get-sips-media", {
         caseid
     });
 
diff --git a/actions/services/searchDirectService.js b/actions/services/searchDirectService.js
index 9eee7403..d482afe8 100644
--- a/actions/services/searchDirectService.js
+++ b/actions/services/searchDirectService.js
@@ -244,7 +244,7 @@ export const getSearchDocumentDetailsPaged = (
 
 export const getLinkedCases = (parentIncidentid) => {
     return getJson(
-        "/api/endpoint/getlinkedcases_api?parentincidentid=" + parentIncidentid
+        "/api/cases/get-linked-cases?parentincidentid=" + parentIncidentid
     ).catch((error) => {
         consoleLogger(error);
     });
diff --git a/context/api-grouping-adoption-roadmap.md b/context/api-grouping-adoption-roadmap.md
index d08afaec..d1b4d8cd 100644
--- a/context/api-grouping-adoption-roadmap.md
+++ b/context/api-grouping-adoption-roadmap.md
@@ -318,6 +318,59 @@ UI journey
     - grouping would require contract change
 - In these cases, documentation may still classify the area conceptually, but additive façade rollout should wait for a safer bounded slice.
 
+#### Additional vertical-slice proof point — Case Details read journey
+
+- The active Case Details read journey now has a fourth additive grouping slice for the proven case-specific read family only:
+    - grouped façade routes exist under `pages/api/cases/` for the proven active reads:
+        - `get-incident-by-id`
+        - `get-case-message`
+        - `get-linked-cases`
+        - `get-sips-events`
+        - `get-sips-media`
+    - the existing service-layer adoption is split across the current owning read services:
+        - `actions/services/caseDirectService.js` now targets grouped cases routes for:
+            - `getIncidentbyID`
+            - `getCaseMessage`
+            - `getSIPSEvents`
+            - `getSIPSMedia`
+        - `actions/services/searchDirectService.js` now targets grouped cases routes for:
+            - `getLinkedCases`
+    - legacy endpoint handlers remain present and canonical behind the façade:
+        - `pages/api/endpoint/getincidentbyid_api.js`
+        - `pages/api/endpoint/getcasemessage_api.js`
+        - `pages/api/endpoint/getlinkedcases_api.js`
+        - `pages/api/endpoint/getsipsevents_api.js`
+        - `pages/api/endpoint/getsipsmedia_api.js`
+- The bounded audit established that the true active Case Details read journey is narrower than the full case page bootstrap:
+    - public ticketnumber case pages (`pages/case/[ticketnumber].js`) still bootstrap primarily through the search family:
+        - `getBasicSearch(...)`
+        - `getSearchDetails(...)`
+    - incident-id case pages (`pages/case/id/[incident].js` and `pages/myportal/case/id/[incident].js`) use the case-specific incident-id route
+    - linked cases are actively loaded inside `components/case/summary.js` as a case-details read concern
+    - SIPS events/media are active case-page enrichments for the relevant case type
+    - documents remain a separate active journey owned by the documents slice through `components/case/documents.js` and `actions/services/searchDirectService.js`
+- The following routes were intentionally left outside this grouped adoption scope:
+    - `getbasicsearch_api.js`
+    - `getbasicsearchdetails_api.js`
+    - `getbasicsearchdetailspaged_api.js`
+    - `getsearchdocumentdetails_api.js`
+    - `getsearchdocumentdetailspaged_api.js`
+    - `getsearchdocumentTypes_api.js`
+    - `getcase_api.js`
+    - `getcasebyid_api.js`
+    - `getportalmoduledetails_api.js`
+- Exclusion reasoning:
+    - search bootstrap/detail-expansion routes remain part of Public Search or search-to-case bootstrap rather than the narrowed case-specific read family
+    - published document metadata remains owned by the documents slice
+    - `getcase_api.js` and `getcasebyid_api.js` are not proven active in the current case-page read path and remain adjacent/support routes
+    - `getportalmoduledetails_api.js` is actively used in myportal aggregation/detail enrichment rather than the bounded public/myportal case-details page read slice itself
+- For this Case Details slice, a complete vertical grouping slice means:
+    - the proven case-specific read family has grouped façade routes
+    - current owning service calls for that family target the grouped routes
+    - adjacent search bootstrap and documents routes remain unchanged
+    - legacy endpoint handlers remain canonical
+    - no route migration, deletion, or contract change has occurred
+
 ---
 
 ### Stage 3 — Documentation Maturity
diff --git a/memory-bank/change-log.md b/memory-bank/change-log.md
index c57d7649..ecf73dd9 100644
--- a/memory-bank/change-log.md
+++ b/memory-bank/change-log.md
@@ -20,6 +20,86 @@ Follow-ups:
 
 ### CL-2026-06-25-API-GROUPING-FACADE-SEARCH-VERTICAL-SLICE: active public search results grouping and service adoption
 
+### CL-2026-06-25-API-GROUPING-FACADE-CASE-DETAILS-VERTICAL-SLICE: bounded case-details read grouping and service adoption
+
+date: 2026-06-25  
+author: Cline  
+scope: `pages/api/cases/get-incident-by-id.js`, `pages/api/cases/get-case-message.js`, `pages/api/cases/get-linked-cases.js`, `pages/api/cases/get-sips-events.js`, `pages/api/cases/get-sips-media.js`, `actions/services/caseDirectService.js`, `actions/services/searchDirectService.js`, `tests/phase22/api-grouping-facade-case-details.test.cjs`, `context/api-grouping-adoption-roadmap.md`  
+type: change  
+rationale: Implement the next additive API grouping façade vertical slice for the bounded Case Details read journey by grouping only the proven case-specific read family under `pages/api/cases/` and adopting those grouped routes in the existing owning service layers without changing bootstrap/search/documents behavior.  
+impact: Runtime behaviour is intended to remain unchanged; grouped cases façade routes now cover the proven incident-id, case-message, linked-cases, and SIPS enrichment reads, legacy endpoint handlers remain canonical, and no route migration, deletion, contract change, document behaviour change, search behaviour change, auth change, storage change, or submission/orchestration change has occurred.  
+status: completed
+
+Summary:
+
+- Confirmed the required context was read before implementation:
+    - `context/api-grouping-plan.md`
+    - `context/api-grouping-adoption-roadmap.md`
+    - `context/api-route-map.md`
+    - `context/journey-architecture-map.md`
+    - `context/architecture.md`
+    - `memory-bank/change-log.md`
+- Performed a bounded audit of the active Case Details read journey across pages, components, services, and endpoint usage.
+- Audit findings established that:
+    - `pages/case/[ticketnumber].js` and `pages/myportal/case/[ticketnumber].js` still bootstrap primarily through the Public Search family using `getBasicSearch(...)` and `getSearchDetails(...)`
+    - `pages/case/id/[incident].js` and `pages/myportal/case/id/[incident].js` actively use the case-specific incident-id read route through `getIncidentbyID(...)`
+    - `getCaseMessage(...)` is actively used in case-page loading for banner/message content
+    - `getLinkedCases(...)` is actively used inside `components/case/summary.js` as a case-details read concern
+    - `getSIPSEvents(...)` and `getSIPSMedia(...)` are active case-page enrichments for relevant SIPS cases
+    - `components/case/documents.js` and document metadata routes remain part of the documents slice, not this case-details slice
+    - `getcase_api.js`, `getcasebyid_api.js`, and `getportalmoduledetails_api.js` are adjacent/support reads but were not proven to belong to the bounded active case-page read path for this slice
+- Added grouped façade routes under `pages/api/cases/` for the proven case-specific read family only:
+    - `get-incident-by-id.js`
+    - `get-case-message.js`
+    - `get-linked-cases.js`
+    - `get-sips-events.js`
+    - `get-sips-media.js`
+- Implemented each façade as the smallest safe compatibility wrapper:
+    - import the existing legacy endpoint handler
+    - delegate `req` and `res` directly to that existing handler
+- Updated only the existing owning service call sites needed for the bounded slice:
+    - `actions/services/caseDirectService.js`
+        - `getIncidentbyID`
+        - `getCaseMessage`
+        - `getSIPSEvents`
+        - `getSIPSMedia`
+    - `actions/services/searchDirectService.js`
+        - `getLinkedCases`
+- Left the following unchanged:
+    - legacy endpoint handlers
+    - search bootstrap routes and search detail expansion routes
+    - document metadata/download routes
+    - CRM queries
+    - transforms
+    - query parameter names
+    - response contracts
+    - status codes
+    - auth/session behavior
+    - storage/queue/submission behavior
+- Added focused characterization coverage to prove:
+    - grouped cases façade routes delegate correctly
+    - legacy endpoint handlers remain present
+    - adopted service methods now target grouped cases routes
+    - request-contract cues remain unchanged
+    - adjacent search/documents/support routes remain outside grouped adoption scope
+- Updated the adoption roadmap to record the audited scope boundary, included routes, excluded routes, service adoption status, and behaviour-preservation notes for the Case Details read slice.
+
+Validation:
+
+- Focused validation only intended for this slice:
+    - `npx eslint pages/api/cases/*.js actions/services/caseDirectService.js actions/services/searchDirectService.js tests/phase22/api-grouping-facade-case-details.test.cjs context/api-grouping-adoption-roadmap.md memory-bank/change-log.md`
+    - `node tests/phase22/api-grouping-facade-case-details.test.cjs`
+- No repository-wide validation run.
+
+Follow-ups:
+
+- The bounded Case Details read family is now a complete façade grouping slice only for the proven case-specific read routes adopted here.
+- Adjacent case bootstrap, document, and myportal aggregation/detail-enrichment routes should remain separate future slices if needed.
+
+---
+
+### CL-2026-06-25-API-GROUPING-FACADE-SEARCH-VERTICAL-SLICE: active public search results grouping and service adoption
+
 ### CL-2026-06-25-API-GROUPING-FACADE-ROLLOUT-CHECKPOINT: proven rollout pattern and guardrails checkpoint
 
 date: 2026-06-25  
diff --git a/pages/api/cases/get-case-message.js b/pages/api/cases/get-case-message.js
new file mode 100644
index 00000000..c02a642c
--- /dev/null
+++ b/pages/api/cases/get-case-message.js
@@ -0,0 +1,5 @@
+import legacyGetCaseMessageHandler from "../endpoint/getcasemessage_api";
+
+export default async function getCaseMessageFacade(req, res) {
+    return legacyGetCaseMessageHandler(req, res);
+}
diff --git a/pages/api/cases/get-incident-by-id.js b/pages/api/cases/get-incident-by-id.js
new file mode 100644
index 00000000..bf937a86
--- /dev/null
+++ b/pages/api/cases/get-incident-by-id.js
@@ -0,0 +1,5 @@
+import legacyGetIncidentByIdHandler from "../endpoint/getincidentbyid_api";
+
+export default async function getIncidentByIdFacade(req, res) {
+    return legacyGetIncidentByIdHandler(req, res);
+}
diff --git a/pages/api/cases/get-linked-cases.js b/pages/api/cases/get-linked-cases.js
new file mode 100644
index 00000000..94f525d6
--- /dev/null
+++ b/pages/api/cases/get-linked-cases.js
@@ -0,0 +1,5 @@
+import legacyGetLinkedCasesHandler from "../endpoint/getlinkedcases_api";
+
+export default async function getLinkedCasesFacade(req, res) {
+    return legacyGetLinkedCasesHandler(req, res);
+}
diff --git a/pages/api/cases/get-sips-events.js b/pages/api/cases/get-sips-events.js
new file mode 100644
index 00000000..5941df85
--- /dev/null
+++ b/pages/api/cases/get-sips-events.js
@@ -0,0 +1,5 @@
+import legacyGetSipsEventsHandler from "../endpoint/getsipsevents_api";
+
+export default async function getSipsEventsFacade(req, res) {
+    return legacyGetSipsEventsHandler(req, res);
+}
diff --git a/pages/api/cases/get-sips-media.js b/pages/api/cases/get-sips-media.js
new file mode 100644
index 00000000..290a65bc
--- /dev/null
+++ b/pages/api/cases/get-sips-media.js
@@ -0,0 +1,5 @@
+import legacyGetSipsMediaHandler from "../endpoint/getsipsmedia_api";
+
+export default async function getSipsMediaFacade(req, res) {
+    return legacyGetSipsMediaHandler(req, res);
+}
diff --git a/tests/phase22/api-grouping-facade-case-details.test.cjs b/tests/phase22/api-grouping-facade-case-details.test.cjs
new file mode 100644
index 00000000..0e4eb752
--- /dev/null
+++ b/tests/phase22/api-grouping-facade-case-details.test.cjs
@@ -0,0 +1,184 @@
+const assert = require("assert");
+const fs = require("fs");
+const path = require("path");
+
+const { loadModule, createRes } = require("../phase21/_shared.cjs");
+
+const rootDir = path.resolve(__dirname, "..", "..");
+
+const tests = [];
+const test = (name, fn) => tests.push({ name, fn });
+
+const read = (relativePath) =>
+    fs.readFileSync(path.join(rootDir, relativePath), "utf8");
+
+test("cases get-incident-by-id facade delegates to legacy handler", async () => {
+    const calls = [];
+    const mod = loadModule("pages/api/cases/get-incident-by-id.js", {
+        legacyGetIncidentByIdHandler: async (req, res) => {
+            calls.push({ req, res });
+            return res.status(200).json({ ok: true, route: "incident-by-id" });
+        }
+    });
+
+    const req = { method: "GET", query: { searchString: "abc-123" } };
+    const res = createRes();
+    await mod.default(req, res);
+
+    assert.strictEqual(calls.length, 1);
+    assert.strictEqual(calls[0].req, req);
+    assert.strictEqual(calls[0].res, res);
+});
+
+test("cases get-case-message facade delegates to legacy handler", async () => {
+    const calls = [];
+    const mod = loadModule("pages/api/cases/get-case-message.js", {
+        legacyGetCaseMessageHandler: async (req, res) => {
+            calls.push({ req, res });
+            return res.status(200).json({ ok: true, route: "case-message" });
+        }
+    });
+
+    const req = { method: "GET", query: { id: "case-1" } };
+    const res = createRes();
+    await mod.default(req, res);
+
+    assert.strictEqual(calls.length, 1);
+    assert.strictEqual(calls[0].req, req);
+    assert.strictEqual(calls[0].res, res);
+});
+
+test("cases get-linked-cases facade delegates to legacy handler", async () => {
+    const calls = [];
+    const mod = loadModule("pages/api/cases/get-linked-cases.js", {
+        legacyGetLinkedCasesHandler: async (req, res) => {
+            calls.push({ req, res });
+            return res.status(200).json({ ok: true, route: "linked-cases" });
+        }
+    });
+
+    const req = { method: "GET", query: { parentincidentid: "parent-1" } };
+    const res = createRes();
+    await mod.default(req, res);
+
+    assert.strictEqual(calls.length, 1);
+    assert.strictEqual(calls[0].req, req);
+    assert.strictEqual(calls[0].res, res);
+});
+
+test("cases get-sips-events facade delegates to legacy handler", async () => {
+    const calls = [];
+    const mod = loadModule("pages/api/cases/get-sips-events.js", {
+        legacyGetSipsEventsHandler: async (req, res) => {
+            calls.push({ req, res });
+            return res.status(200).json({ ok: true, route: "sips-events" });
+        }
+    });
+
+    const req = { method: "GET", query: { caseid: "sips-1" } };
+    const res = createRes();
+    await mod.default(req, res);
+
+    assert.strictEqual(calls.length, 1);
+    assert.strictEqual(calls[0].req, req);
+    assert.strictEqual(calls[0].res, res);
+});
+
+test("cases get-sips-media facade delegates to legacy handler", async () => {
+    const calls = [];
+    const mod = loadModule("pages/api/cases/get-sips-media.js", {
+        legacyGetSipsMediaHandler: async (req, res) => {
+            calls.push({ req, res });
+            return res.status(200).json({ ok: true, route: "sips-media" });
+        }
+    });
+
+    const req = { method: "GET", query: { caseid: "sips-2" } };
+    const res = createRes();
+    await mod.default(req, res);
+
+    assert.strictEqual(calls.length, 1);
+    assert.strictEqual(calls[0].req, req);
+    assert.strictEqual(calls[0].res, res);
+});
+
+test("legacy case-details endpoint handlers remain present", async () => {
+    const legacyFiles = [
+        "pages/api/endpoint/getincidentbyid_api.js",
+        "pages/api/endpoint/getcasemessage_api.js",
+        "pages/api/endpoint/getlinkedcases_api.js",
+        "pages/api/endpoint/getsipsevents_api.js",
+        "pages/api/endpoint/getsipsmedia_api.js",
+        "pages/api/endpoint/getbasicsearch_api.js",
+        "pages/api/endpoint/getbasicsearchdetails_api.js",
+        "pages/api/endpoint/getsearchdocumentdetails_api.js"
+    ];
+
+    legacyFiles.forEach((filePath) => {
+        assert.strictEqual(
+            fs.existsSync(path.join(rootDir, filePath)),
+            true,
+            filePath
+        );
+    });
+});
+
+test("caseDirectService adopted case-details reads now target grouped cases routes", async () => {
+    const source = read("actions/services/caseDirectService.js");
+
+    assert.match(source, /\/api\/cases\/get-incident-by-id/);
+    assert.match(source, /\/api\/cases\/get-case-message/);
+    assert.match(source, /\/api\/cases\/get-sips-events/);
+    assert.match(source, /\/api\/cases\/get-sips-media/);
+});
+
+test("searchDirectService linked-cases read now targets grouped cases route", async () => {
+    const source = read("actions/services/searchDirectService.js");
+
+    assert.match(source, /\/api\/cases\/get-linked-cases\?/);
+});
+
+test("case-details service contracts remain unchanged", async () => {
+    const caseSource = read("actions/services/caseDirectService.js");
+    const searchSource = read("actions/services/searchDirectService.js");
+
+    assert.match(caseSource, /id: searchString/);
+    assert.match(caseSource, /searchString/);
+    assert.match(caseSource, /caseid/);
+    assert.match(searchSource, /parentincidentid=/);
+});
+
+test("adjacent search and documents routes remain outside case-details adoption scope", async () => {
+    const caseSource = read("actions/services/caseDirectService.js");
+    const searchSource = read("actions/services/searchDirectService.js");
+
+    assert.match(searchSource, /\/api\/endpoint\/getbasicsearch_api/);
+    assert.match(searchSource, /\/api\/endpoint\/getbasicsearchdetails_api/);
+    assert.match(
+        searchSource,
+        /\/api\/documents\/get-search-document-details\?/
+    );
+    assert.doesNotMatch(caseSource, /\/api\/cases\/get-case"/);
+    assert.doesNotMatch(caseSource, /\/api\/cases\/get-case-by-id/);
+});
+
+async function run() {
+    let failures = 0;
+
+    for (const { name, fn } of tests) {
+        try {
+            await fn();
+            console.log(`✓ ${name}`);
+        } catch (error) {
+            failures += 1;
+            console.error(`✗ ${name}`);
+            console.error(error);
+        }
+    }
+
+    if (failures > 0) {
+        process.exit(1);
+    }
+}
+
+run();