diff --git a/CHANGELOG.md b/CHANGELOG.md
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+# Changelog
+
+All notable changes to IssueManager are documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+### Sprint 3
+
+#### Added
+
+- **Issue Filters & Search** (#116)
+  - `GET /api/v1/issues` now supports `page`, `pageSize`, `searchTerm`, `authorName`, `statusName`, and `categoryName` query parameters
+  - IssuesPage component wires all filters to the API call for real-time filtering
+  - Search term performs regex-based matching on issue titles and descriptions (case-insensitive)
+
+- **Category Archive API** (#120)
+  - `DELETE /api/v1/categories/{id}` endpoint for admin-only category archiving (soft-delete)
+  - Archived categories are marked with `Archived=true` and `ArchivedBy` timestamp
+  - Archived categories no longer appear in issue creation forms
+  - Preserves historical data while removing active usage
+
+- **Status Archive API** (#121)
+  - `DELETE /api/v1/statuses/{id}` endpoint for admin-only status archiving (soft-delete)
+  - Archived statuses are marked with `Archived=true` and `ArchivedBy` timestamp
+  - Archived statuses no longer appear in issue workflow selectors
+  - Preserves historical data while removing active usage
+
+- **Category Archive UI** (#124)
+  - Admin-only Archive button in CategoriesPage grid
+  - Confirmation dialog to prevent accidental archiving
+  - Archived categories excluded from display
+
+- **Status Archive UI** (#123)
+  - Admin-only Archive button in StatusesPage grid
+  - Confirmation dialog to prevent accidental archiving
+  - Archived statuses excluded from display
+
+#### Documentation
+
+- Added comprehensive API documentation for issue filtering
+- Added soft-delete behavior documentation for categories and statuses
+- Added admin UI workflow documentation for archiving operations
diff --git a/docs/features/categories.md b/docs/features/categories.md
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+# Categories API & UI
+
+## Overview
+
+Categories allow issues to be classified by type (e.g., "Bug", "Feature Request", "Documentation"). Admins can manage categories, including archiving (soft-deleting) them to prevent new usage while preserving historical data.
+
+## DELETE /api/v1/categories/{id}
+
+Archives (soft-deletes) a category. Only administrators can perform this action.
+
+### Authorization
+
+- **Required Role:** Administrator
+- **Response:** `204 No Content` on success or `403 Forbidden` if user lacks permissions
+
+### Behavior
+
+When a category is archived:
+- The category document is marked with `Archived = true`
+- The `ArchivedBy` field is set to the current user's ID
+- The `ArchivedAt` timestamp is recorded
+- Archived categories **do not appear** in issue creation forms
+- Existing issues with archived categories remain visible but cannot be reassigned to that category
+- The category can be restored by a squad member with database access (manual intervention)
+
+### Example Request
+
+```
+DELETE /api/v1/categories/507f1f77bcf86cd799439011
+Authorization: Bearer {token}
+```
+
+### Example Response
+
+```
+HTTP/1.1 204 No Content
+```
+
+## CategoriesPage.razor
+
+The CategoriesPage component displays a grid of all active categories and provides admin controls.
+
+### Features
+
+- **Category Grid:** Displays all active (non-archived) categories
+- **Archive Button:** Admin-only action to archive a category
+- **Confirmation Dialog:** Protects against accidental archiving
+- **Read-only for Non-Admins:** Non-administrators can view but cannot take actions
+
+### Admin Workflow
+
+1. Navigate to the Categories page
+2. Locate the category to archive
+3. Click the **Archive** button
+4. Confirm the action in the dialog
+5. The category is marked as archived and removed from all issue creation forms
+
+### Implementation Notes
+
+- Archive confirmation uses a modal dialog to prevent accidental data loss
+- Archived categories are excluded from the display grid to reduce clutter
+- Only users with the Administrator role can see and use the Archive button
diff --git a/docs/features/issues.md b/docs/features/issues.md
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+# Issues API & UI
+
+## Overview
+
+The Issues API provides endpoints to create, read, update, and list issues. The UI surfaces these capabilities through the IssuesPage component with integrated filtering and search.
+
+## GET /api/v1/issues
+
+Retrieves a paginated list of issues with optional filtering and search.
+
+### Query Parameters
+
+| Parameter | Type | Required | Description |
+|-----------|------|----------|-------------|
+| `page` | integer | No | Page number (0-indexed, default: 0) |
+| `pageSize` | integer | No | Results per page (default: 10, max: 100) |
+| `searchTerm` | string | No | Searches issue titles and descriptions (regex-based, case-insensitive) |
+| `authorName` | string | No | Filter by issue author name (exact match, case-insensitive) |
+| `statusName` | string | No | Filter by status name (e.g., "Open", "In Progress", "Closed") |
+| `categoryName` | string | No | Filter by category name (e.g., "Bug", "Feature Request") |
+
+### Example Requests
+
+**List first 10 issues:**
+```
+GET /api/v1/issues?page=0&pageSize=10
+```
+
+**Search for issues with "login" in title/description:**
+```
+GET /api/v1/issues?searchTerm=login&page=0&pageSize=10
+```
+
+**Filter by author and status:**
+```
+GET /api/v1/issues?authorName=john&statusName=Open&page=0&pageSize=10
+```
+
+**Combine search and filters:**
+```
+GET /api/v1/issues?searchTerm=auth&categoryName=Bug&statusName=Open&page=0&pageSize=20
+```
+
+### Response
+
+Returns an `IssuesPage` object:
+```json
+{
+  "page": 0,
+  "pageSize": 10,
+  "totalCount": 42,
+  "items": [
+    {
+      "id": "507f1f77bcf86cd799439011",
+      "title": "Login page is broken",
+      "description": "...",
+      "authorName": "john",
+      "statusName": "Open",
+      "categoryName": "Bug",
+      "createdAt": "2024-01-15T10:30:00Z",
+      "updatedAt": "2024-01-20T14:22:00Z"
+    }
+  ]
+}
+```
+
+## IssuesPage.razor
+
+The IssuesPage component provides a user-friendly interface for browsing and filtering issues.
+
+### Features
+
+- **Pagination:** Navigate through results using page controls
+- **Search:** Full-text search across issue titles and descriptions
+- **Filter by Author:** Select issues created by a specific author
+- **Filter by Status:** Select issues with a specific status
+- **Filter by Category:** Select issues with a specific category
+
+### Implementation Notes
+
+All filter selections are wired directly to the API call, ensuring real-time filtering without page reload. Filters can be combined for precise issue lookup.
diff --git a/docs/features/statuses.md b/docs/features/statuses.md
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+# Statuses API & UI
+
+## Overview
+
+Statuses track the lifecycle of issues (e.g., "Open", "In Progress", "Closed", "On Hold"). Admins can manage statuses, including archiving (soft-deleting) them to retire statuses while preserving historical data.
+
+## DELETE /api/v1/statuses/{id}
+
+Archives (soft-deletes) a status. Only administrators can perform this action.
+
+### Authorization
+
+- **Required Role:** Administrator
+- **Response:** `204 No Content` on success or `403 Forbidden` if user lacks permissions
+
+### Behavior
+
+When a status is archived:
+- The status document is marked with `Archived = true`
+- The `ArchivedBy` field is set to the current user's ID
+- The `ArchivedAt` timestamp is recorded
+- Archived statuses **do not appear** in issue status selectors or workflows
+- Existing issues with archived statuses remain visible but cannot be transitioned to that status
+- The status can be restored by a squad member with database access (manual intervention)
+
+### Example Request
+
+```
+DELETE /api/v1/statuses/507f1f77bcf86cd799439011
+Authorization: Bearer {token}
+```
+
+### Example Response
+
+```
+HTTP/1.1 204 No Content
+```
+
+## StatusesPage.razor
+
+The StatusesPage component displays a grid of all active statuses and provides admin controls.
+
+### Features
+
+- **Status Grid:** Displays all active (non-archived) statuses
+- **Archive Button:** Admin-only action to archive a status
+- **Confirmation Dialog:** Protects against accidental archiving
+- **Read-only for Non-Admins:** Non-administrators can view but cannot take actions
+
+### Admin Workflow
+
+1. Navigate to the Statuses page
+2. Locate the status to archive
+3. Click the **Archive** button
+4. Confirm the action in the dialog
+5. The status is marked as archived and removed from all issue workflow selectors
+
+### Implementation Notes
+
+- Archive confirmation uses a modal dialog to prevent accidental data loss
+- Archived statuses are excluded from the display grid to reduce clutter
+- Only users with the Administrator role can see and use the Archive button
+- Status archiving mirrors category archiving for consistency