Memento

Instructions

Implementation Reference

• src/server.js:112-123 (handler)

  MCP server tool registration, schema definition, and handler function for 'delete_entities'. Delegates to KnowledgeGraphManager.deleteEntities and returns success response.

  // Tool: delete_entities
  this.tool(
      'delete_entities',
      'Delete entities (and cascaded observations/relations) by their names.',
      {
          entityNames: z.array(z.string()).describe('Names of entities to delete.')
      },
      async ({ entityNames }) => {
          await this.#knowledgeGraphManager.deleteEntities(entityNames);
          return { content: [{ type: 'text', text: 'Entities deleted' }] };
      }
  );

• src/knowledge-graph-manager.js:116-118 (handler)

  KnowledgeGraphManager.deleteEntities method that delegates the deletion to the underlying GraphRepository implementation.

  async deleteEntities(names) {
      await this.#repository.deleteEntities(names);
  }

• src/sqlite/graph-repo.js:142-149 (handler)

  SQLite-specific implementation of deleteEntities, executing DELETE on entities table (cascades to observations and relations).

  async deleteEntities(names) {
      if (!names.length) {
          return;
      }
  
      const placeholders = names.map(() => '?').join(',');
      await this.db.run(`DELETE FROM entities WHERE name IN (${placeholders})`, names);
  }

• src/postgres/graph-repo.js:239-250 (handler)

  PostgreSQL-specific implementation of deleteEntities, executing DELETE on entities table using ANY array (cascades).

  async deleteEntities(names) {
      if (!names.length) {
          return;
      }
  
      await this.#query(
          `DELETE
           FROM entities
           WHERE name = ANY ($1)`,
          [ names ]
      );
  }

• src/graph-repository.js:28-28 (schema)

  Interface definition (JSDoc) for GraphRepository.deleteEntities method.

  * @property {(names: string[]) => Promise<void>} deleteEntities