diff --git a/app/config/openapi.js b/app/config/openapi.js
index 42a1412..9dbc7f5 100644
--- a/app/config/openapi.js
+++ b/app/config/openapi.js
@@ -843,20 +843,72 @@ const spec = {
                 summary: 'Get one time entry',
                 security: [{ authKey: [] }],
                 parameters: [{ name: 'id', in: 'path', required: true, schema: { type: 'integer' } }],
-                responses: { 200: { description: 'Found' }, 404: { description: 'Not found' }, 403: { description: 'Auth failure' } },
+                responses: {
+                    200: {
+                        description: 'Found — {message, timeEntry} envelope',
+                        content: {
+                            'application/json': {
+                                schema: {
+                                    type: 'object',
+                                    properties: {
+                                        message: { type: 'string' },
+                                        timeEntry: { $ref: '#/components/schemas/TimeEntry' },
+                                    },
+                                },
+                            },
+                        },
+                    },
+                    404: { description: 'Not found' },
+                    403: { description: 'Auth failure' },
+                },
             },
             patch: {
                 summary: 'Partial update of a time entry',
                 security: [{ authKey: [] }],
                 parameters: [{ name: 'id', in: 'path', required: true, schema: { type: 'integer' } }],
                 requestBody: { content: { 'application/json': { schema: { $ref: '#/components/schemas/TimeEntry' } } } },
-                responses: { 200: { description: 'Updated' }, 400: { description: 'No updatable fields supplied' }, 404: { description: 'Not found' }, 403: { description: 'Auth failure' } },
+                responses: {
+                    200: {
+                        description: 'Updated — {message, timeEntry} envelope',
+                        content: {
+                            'application/json': {
+                                schema: {
+                                    type: 'object',
+                                    properties: {
+                                        message: { type: 'string' },
+                                        timeEntry: { $ref: '#/components/schemas/TimeEntry' },
+                                    },
+                                },
+                            },
+                        },
+                    },
+                    400: { description: 'No updatable fields supplied' },
+                    404: { description: 'Not found' },
+                    403: { description: 'Auth failure' },
+                },
             },
             delete: {
                 summary: 'Soft-delete a time entry',
                 security: [{ authKey: [] }],
                 parameters: [{ name: 'id', in: 'path', required: true, schema: { type: 'integer' } }],
-                responses: { 200: { description: 'Archived' }, 404: { description: 'Not found' }, 403: { description: 'Auth failure' } },
+                responses: {
+                    200: {
+                        description: 'Archived — {message, id} envelope (id echoes the deleted row\'s teId)',
+                        content: {
+                            'application/json': {
+                                schema: {
+                                    type: 'object',
+                                    properties: {
+                                        message: { type: 'string' },
+                                        id: { type: 'integer' },
+                                    },
+                                },
+                            },
+                        },
+                    },
+                    404: { description: 'Not found' },
+                    403: { description: 'Auth failure' },
+                },
             },
         },
         '/v1/timeentry/export.csv': {
diff --git a/tests/api/openapi.test.js b/tests/api/openapi.test.js
index 55833c7..442ed0d 100644
--- a/tests/api/openapi.test.js
+++ b/tests/api/openapi.test.js
@@ -129,6 +129,35 @@ describe('OpenAPI spec', () => {
         }
     });
 
+    test('/v1/timeentry/{id} GET / PATCH / DELETE 200 declare their envelopes', async () => {
+        // Same missing-content-schema pattern as #312 (customer GET),
+        // #326 (timeentry POST), #340 (customer bycompany), #348
+        // (timeentry bycompany). The single-row endpoints
+        // historically had only `description: ...` on the 200s. Pin
+        // the controller-emitted envelopes:
+        //   GET   → {message, timeEntry}
+        //   PATCH → {message, timeEntry}
+        //   DELETE → {message, id} (no entity body — the row is archived)
+        const res = await request(app).get('/openapi.json');
+        const ops = res.body.paths['/v1/timeentry/{id}'];
+
+        const getSchema = ops.get.responses['200'].content['application/json'].schema;
+        expect(getSchema.properties.message.type).toBe('string');
+        expect(getSchema.properties.timeEntry.$ref).toBe('#/components/schemas/TimeEntry');
+
+        const patchSchema = ops.patch.responses['200'].content['application/json'].schema;
+        expect(patchSchema.properties.message.type).toBe('string');
+        expect(patchSchema.properties.timeEntry.$ref).toBe('#/components/schemas/TimeEntry');
+
+        const deleteSchema = ops.delete.responses['200'].content['application/json'].schema;
+        expect(deleteSchema.properties.message.type).toBe('string');
+        expect(deleteSchema.properties.id.type).toBe('integer');
+        // DELETE responds with the row's id, NOT the full entity —
+        // pin the absence so a future "echo the deleted row back"
+        // refactor surfaces here.
+        expect(deleteSchema.properties.timeEntry).toBeUndefined();
+    });
+
     test('GET /v1/timeentry/bycompany/{id} 200 declares the {message, count, limit, offset, timeEntries} envelope', async () => {
         // Parallel to the customer/bycompany declaration in #340.
         // Pre-fix the spec said only `description: 'OK'`; SDK code-gen