diff --git a/public/release-manifest.json b/public/release-manifest.json
index 7284e0e..0627d5f 100644
--- a/public/release-manifest.json
+++ b/public/release-manifest.json
@@ -38,28 +38,28 @@
   },
   "contractSet": {
     "setAlgorithm": "CA_CONTRACT_SET_V1",
-    "setDigest": "sha256:bafc39b2210dc792a763567b3a0f69da42004949899a8ec289c8c0ea9ad7a064",
+    "setDigest": "sha256:104bab24221f6d1a4c5fa7df68f5d027d227325a88fa507ebfcccebb439eb7c4",
     "packages": [
       {
         "packageId": "@tech-log/management-contract",
         "version": "1.0.0",
         "digest": "sha256:72650735061fde627f5037571eb986cb758f44a546f065c88408399f8eec4a55",
         "runtimeProtocolVersion": 1,
-        "sourceRevision": "ff0c12a"
+        "sourceRevision": "0ffbc28"
       },
       {
         "packageId": "@tech-log/public-contract",
         "version": "2.1.0",
-        "digest": "sha256:34efa8d2fdba959373081e5b2aace252be86bef243a80c238d8c4af50fa8eb0a",
+        "digest": "sha256:79949b286e2b4d28333d3376945960a319d247b675b23a73f50b75ce10994c5e",
         "runtimeProtocolVersion": 1,
-        "sourceRevision": "ff0c12a"
+        "sourceRevision": "0ffbc28"
       },
       {
         "packageId": "@tech-log/studio-contract",
         "version": "3.1.0",
         "digest": "sha256:18dd46898be64b07f7e826409d19347512613ee2e22420028a4a0644f50f37dd",
         "runtimeProtocolVersion": 1,
-        "sourceRevision": "ff0c12a"
+        "sourceRevision": "0ffbc28"
       }
     ]
   }
diff --git a/src/features/tech-log/adapters/http/http-public-content-gateway.ts b/src/features/tech-log/adapters/http/http-public-content-gateway.ts
index ea70279..a993965 100644
--- a/src/features/tech-log/adapters/http/http-public-content-gateway.ts
+++ b/src/features/tech-log/adapters/http/http-public-content-gateway.ts
@@ -147,7 +147,9 @@ export function createHttpPublicContentGateway(
       return Object.freeze({
         ...baseOf("CASE", slug, {
           title: body.title as string,
-          summary: body.problemSummary as string,
+          // 제목 바로 아래에 오는 것은 문서의 요약이다. 유형별 요약(문제/범위)을 쓰면 바로 아래
+          // 블록과 같은 글을 두 번 말한다.
+          summary: (body.summary as string) ?? "",
           path: canonicalPath,
           primaryTopic: body.primaryTopic as never,
           primaryProject: body.primaryProject as never,
@@ -192,7 +194,7 @@ export function createHttpPublicContentGateway(
       return Object.freeze({
         ...baseOf("REFERENCE", slug, {
           title: body.title as string,
-          summary: body.scopeSummary as string,
+          summary: (body.summary as string) ?? "",
           path: canonicalPath,
           primaryTopic: body.primaryTopic as never,
           primaryProject: body.primaryProject as never,
diff --git a/src/features/tech-log/contracts/management/canonical-source.json b/src/features/tech-log/contracts/management/canonical-source.json
index 3c1a4f3..05f7eff 100644
--- a/src/features/tech-log/contracts/management/canonical-source.json
+++ b/src/features/tech-log/contracts/management/canonical-source.json
@@ -2,7 +2,7 @@
   "packageId": "@tech-log/management-contract",
   "version": "1.0.0",
   "digest": "sha256:72650735061fde627f5037571eb986cb758f44a546f065c88408399f8eec4a55",
-  "sourceRevision": "ff0c12a",
+  "sourceRevision": "0ffbc28",
   "operationIds": [
     "createCaseDraft",
     "getCaseForEdit",
diff --git a/src/features/tech-log/contracts/public/canonical-source.json b/src/features/tech-log/contracts/public/canonical-source.json
index b2d328c..538cf49 100644
--- a/src/features/tech-log/contracts/public/canonical-source.json
+++ b/src/features/tech-log/contracts/public/canonical-source.json
@@ -1,8 +1,8 @@
 {
   "packageId": "@tech-log/public-contract",
   "version": "2.1.0",
-  "digest": "sha256:34efa8d2fdba959373081e5b2aace252be86bef243a80c238d8c4af50fa8eb0a",
-  "sourceRevision": "ff0c12a",
+  "digest": "sha256:79949b286e2b4d28333d3376945960a319d247b675b23a73f50b75ce10994c5e",
+  "sourceRevision": "0ffbc28",
   "operationIds": [
     "getPublicSite",
     "getPublicHome",
diff --git a/src/features/tech-log/contracts/public/generated.ts b/src/features/tech-log/contracts/public/generated.ts
index 2957253..321c040 100644
--- a/src/features/tech-log/contracts/public/generated.ts
+++ b/src/features/tech-log/contracts/public/generated.ts
@@ -536,6 +536,7 @@ export interface components {
             indexable: boolean;
             case: {
                 title: string;
+                summary?: string;
                 problemSummary: string;
                 conclusionSummary: string;
                 environmentSummary?: string[];
@@ -571,6 +572,7 @@ export interface components {
             indexable: boolean;
             reference: {
                 title: string;
+                summary?: string;
                 scopeSummary: string;
                 appliesTo: string[];
                 excludedScope: string[];
diff --git a/src/features/tech-log/contracts/public/public-api.openapi.yaml b/src/features/tech-log/contracts/public/public-api.openapi.yaml
index bc34691..28dd4f5 100644
--- a/src/features/tech-log/contracts/public/public-api.openapi.yaml
+++ b/src/features/tech-log/contracts/public/public-api.openapi.yaml
@@ -1239,6 +1239,12 @@ components:
           properties:
             title:
               type: string
+            # 문서가 스스로 밝히는 한 줄 요약이다. 제목 바로 아래에 온다.
+            #
+            # 이 자리가 없어서 화면은 problemSummary / scopeSummary 를 대신 썼고, 그러면 머리말이
+            # 바로 아래의 "문제" 나 "이 기준을 쓰는 이유" 와 같은 글을 두 번 말한다.
+            summary:
+              type: string
             problemSummary:
               type: string
             conclusionSummary:
@@ -1325,6 +1331,12 @@ components:
           properties:
             title:
               type: string
+            # 문서가 스스로 밝히는 한 줄 요약이다. 제목 바로 아래에 온다.
+            #
+            # 이 자리가 없어서 화면은 problemSummary / scopeSummary 를 대신 썼고, 그러면 머리말이
+            # 바로 아래의 "문제" 나 "이 기준을 쓰는 이유" 와 같은 글을 두 번 말한다.
+            summary:
+              type: string
             scopeSummary:
               type: string
             appliesTo:
diff --git a/src/features/tech-log/contracts/studio/canonical-source.json b/src/features/tech-log/contracts/studio/canonical-source.json
index bab32c8..6ae8885 100644
--- a/src/features/tech-log/contracts/studio/canonical-source.json
+++ b/src/features/tech-log/contracts/studio/canonical-source.json
@@ -2,7 +2,7 @@
   "packageId": "@tech-log/studio-contract",
   "version": "3.1.0",
   "digest": "sha256:18dd46898be64b07f7e826409d19347512613ee2e22420028a4a0644f50f37dd",
-  "sourceRevision": "ff0c12a",
+  "sourceRevision": "0ffbc28",
   "operationIds": [
     "getStudioSession",
     "getStudioDashboard",
diff --git a/tests/features/tech-log/public-reference-mapping.test.ts b/tests/features/tech-log/public-reference-mapping.test.ts
index 1499c18..50ab623 100644
--- a/tests/features/tech-log/public-reference-mapping.test.ts
+++ b/tests/features/tech-log/public-reference-mapping.test.ts
@@ -20,6 +20,8 @@ type ReferenceBody =
 test("the public Reference contract keeps the fields the screen reads", () => {
   const reference = {
     title: "",
+    // 제목 바로 아래에 오는 것은 문서의 요약이다. scopeSummary 는 그 아래 "이 기준을 쓰는 이유"다.
+    summary: "",
     scopeSummary: "",
     appliesTo: [],
     excludedScope: [],
@@ -46,6 +48,7 @@ test("the public Reference contract keeps the fields the screen reads", () => {
     "publishedAt",
     "rules",
     "scopeSummary",
+    "summary",
     "tags",
     "title",
     "updatedAt",