| 1: | <?php |
| 2: | |
| 3: | declare(strict_types=1); |
| 4: | |
| 5: | /** |
| 6: | * This file is part of the Nexus MCP SDK package. |
| 7: | * |
| 8: | * (c) 2026 John Paul E. Balandan, CPA <paulbalandan@gmail.com> |
| 9: | * |
| 10: | * For the full copyright and license information, please view |
| 11: | * the LICENSE file that was distributed with this source code. |
| 12: | */ |
| 13: | |
| 14: | namespace Nexus\Mcp\Extension\Skills; |
| 15: | |
| 16: | /** |
| 17: | * Protocol vocabulary of the skills extension (`io.modelcontextprotocol/skills`, SEP-2640). |
| 18: | * |
| 19: | * @see https://github.com/modelcontextprotocol/modelcontextprotocol/blob/main/seps/2640-skills-extension.md |
| 20: | */ |
| 21: | final readonly class Skills |
| 22: | { |
| 23: | public const string IDENTIFIER = 'io.modelcontextprotocol/skills'; |
| 24: | public const string URI_PREFIX = 'skill://'; |
| 25: | public const string MANIFEST_FILENAME = 'SKILL.md'; |
| 26: | public const string MANIFEST_MIME_TYPE = 'text/markdown'; |
| 27: | public const string DIRECTORY_MIME_TYPE = 'inode/directory'; |
| 28: | public const string DIRECTORY_READ_SETTING = 'directoryRead'; |
| 29: | |
| 30: | /** |
| 31: | * The `resources` value of a skill whose content is generated and carries no stable digests. |
| 32: | */ |
| 33: | public const string DYNAMIC_RESOURCES = 'dynamic'; |
| 34: | |
| 35: | /** |
| 36: | * The file count accepted by every host for one skill, above which a host may decline it. |
| 37: | */ |
| 38: | public const int MAX_RESOURCES_PER_SKILL = 512; |
| 39: | |
| 40: | /** |
| 41: | * The total size in bytes accepted by every host for one skill, above which a host may decline it. |
| 42: | */ |
| 43: | public const int MAX_BYTES_PER_SKILL = 16_777_216; |
| 44: | } |
| 45: |