[SILO-1144] feat: Epics write endpoints docs update

.gitignore

@@ -1,6 +1,7 @@
 /coverage
 /src/client/shared.ts
 /src/node/shared.ts
+.cursor
 *.log
 *.tgz
 .DS_Store

docs/.vitepress/config.mts

@@ -686,8 +686,13 @@ export default withMermaid(
                 collapsed: true,
                 items: [
                   { text: "Overview", link: "/api-reference/epics/overview" },
+                  { text: "Create Epic", link: "/api-reference/epics/create-epic" },
                   { text: "List Epics", link: "/api-reference/epics/list-epics" },
                   { text: "Get Epic", link: "/api-reference/epics/get-epic-detail" },
+                  { text: "Update Epic", link: "/api-reference/epics/update-epic" },
+                  { text: "Delete Epic", link: "/api-reference/epics/delete-epic" },
+                  { text: "Add Epic Work Items", link: "/api-reference/epics/add-epic-work-items" },
+                  { text: "List Epic Work Items", link: "/api-reference/epics/list-epic-work-items" },
                 ],
               },
               {

docs/api-reference/epics/add-epic-work-items.md

@@ -0,0 +1,176 @@
+---
+title: Add work items to epic
+description: Add work items to epic via Plane API. HTTP request format, parameters, scopes, and example responses for add work items to epic.
+keywords: plane, plane api, rest api, api integration, epics, add work items to epic
+---
+
+# Add work items to epic
+
+<div class="api-endpoint-badge">
+  <span class="method post">POST</span>
+  <span class="path">/api/v1/workspaces/{slug}/projects/{project_id}/epics/{epic_id}/issues/</span>
+</div>
+
+<div class="api-two-column">
+<div class="api-left">
+
+Add multiple work items as sub-issues under an epic. Validates type hierarchy before assignment.
+
+<div class="params-section">
+
+### Path Parameters
+
+<div class="params-list">
+
+<ApiParam name="epic_id" type="string" :required="true">
+
+Epic ID
+
+</ApiParam>
+
+<ApiParam name="project_id" type="string" :required="true">
+
+Project ID
+
+</ApiParam>
+
+<ApiParam name="slug" type="string" :required="true">
+
+Workspace slug
+
+</ApiParam>
+
+</div>
+</div>
+
+<div class="params-section">
+
+### Body Parameters
+
+<div class="params-list">
+
+<ApiParam name="work_item_ids" type="array" :required="true">
+
+List of work item IDs to add to the epic
+
+</ApiParam>
+
+</div>
+</div>
+
+<div class="params-section">
+
+### Scopes
+
+`projects.epics:write`
+
+</div>
+
+</div>
+
+<div class="api-right">
+
+<CodePanel title="Add work items to epic" :languages="['cURL', 'Python', 'JavaScript']">
+<template #curl>
+
+```bash
+curl -X POST \
+  "https://api.plane.so/api/v1/workspaces/my-workspace/projects/550e8400-e29b-41d4-a716-446655440000/epics/550e8400-e29b-41d4-a716-446655440001/issues/" \
+  -H "X-API-Key: $PLANE_API_KEY" \
+  # Or use -H "Authorization: Bearer $PLANE_OAUTH_TOKEN" \
+  -H "Content-Type: application/json" \
+  -d '{
+  "work_item_ids": [
+    "550e8400-e29b-41d4-a716-446655440010",
+    "550e8400-e29b-41d4-a716-446655440011"
+  ]
+}'
+```
+
+</template>
+<template #python>
+
+```python
+import requests
+
+response = requests.post(
+    "https://api.plane.so/api/v1/workspaces/my-workspace/projects/550e8400-e29b-41d4-a716-446655440000/epics/550e8400-e29b-41d4-a716-446655440001/issues/",
+    headers={"X-API-Key": "your-api-key"},
+    json={
+      "work_item_ids": [
+        "550e8400-e29b-41d4-a716-446655440010",
+        "550e8400-e29b-41d4-a716-446655440011"
+      ]
+    }
+)
+print(response.json())
+```
+
+</template>
+<template #javascript>
+
+```javascript
+const response = await fetch(
+  "https://api.plane.so/api/v1/workspaces/my-workspace/projects/550e8400-e29b-41d4-a716-446655440000/epics/550e8400-e29b-41d4-a716-446655440001/issues/",
+  {
+    method: "POST",
+    headers: {
+      "X-API-Key": "your-api-key",
+      "Content-Type": "application/json",
+    },
+    body: JSON.stringify({
+      work_item_ids: ["550e8400-e29b-41d4-a716-446655440010", "550e8400-e29b-41d4-a716-446655440011"],
+    }),
+  }
+);
+const data = await response.json();
+```
+
+</template>
+</CodePanel>
+
+<ResponsePanel status="200">
+
+```json
+[
+  {
+    "id": "550e8400-e29b-41d4-a716-446655440010",
+    "name": "Implement login screen",
+    "description_html": "<p>Build the login screen UI</p>",
+    "description_stripped": "Build the login screen UI",
+    "description_binary": null,
+    "state": "550e8400-e29b-41d4-a716-446655440002",
+    "priority": "high",
+    "assignees": [],
+    "labels": [],
+    "type": null,
+    "type_id": null,
+    "estimate_point": null,
+    "point": null,
+    "start_date": null,
+    "target_date": null,
+    "parent": "550e8400-e29b-41d4-a716-446655440001",
+    "sequence_id": 12,
+    "sort_order": 65535.0,
+    "is_draft": false,
+    "completed_at": null,
+    "archived_at": null,
+    "last_activity_at": "2025-03-15T10:00:00Z",
+    "project": "550e8400-e29b-41d4-a716-446655440000",
+    "workspace": "550e8400-e29b-41d4-a716-446655440003",
+    "external_id": null,
+    "external_source": null,
+    "deleted_at": null,
+    "created_at": "2025-03-10T09:00:00Z",
+    "updated_at": "2025-03-15T10:00:00Z",
+    "created_by": "550e8400-e29b-41d4-a716-446655440005",
+    "updated_by": null
+  }
+]
+```
+
+</ResponsePanel>
+
+</div>
+
+</div>