Memento

Instructions

Implementation Reference

• src/server.js:222-240 (registration)

  Registers the MCP 'set_importance' tool, including Zod input schema (entityName: string, importance: enum), description, and async handler that resolves via KnowledgeGraphManager and returns formatted JSON response.
  this.tool( 'set_importance', 'Set the importance level for an entity (critical, important, normal, temporary, deprecated).', { entityName: z.string().describe('Name of the entity.'), importance: z.enum(['critical', 'important', 'normal', 'temporary', 'deprecated']) .describe('Importance level for the entity.') }, async ({ entityName, importance }) => ({ content: [{ type: 'text', text: JSON.stringify( await this.#knowledgeGraphManager.setImportance(entityName, importance), null, 2 ) }] }) );
• src/knowledge-graph-manager.js:326-348 (handler)

  Core business logic for setImportance: looks up entityId by name, delegates to ContextManager (searchContextManager), handles errors and formats success/error response.
  async setImportance(entityName, importance) { try { const entityId = await this.getEntityId(entityName); if (!entityId) { return { success: false, error: `Entity "${entityName}" not found` }; } const success = await this.#searchContextManager.setImportance(entityId, importance); return { success, entityName, importance, message: success ? `Importance set to '${importance}' for entity '${entityName}'` : `Failed to set importance for entity '${entityName}'` }; } catch (error) { return { success: false, error: error.message }; } }
• src/context-manager.js:587-595 (helper)

  Helper in ContextManager: validates importance against ImportanceLevel enum values, delegates to GraphRepository.setImportance.
  async setImportance(entityId, importance) { const validLevels = Object.values(ImportanceLevel); if (!validLevels.includes(importance)) { throw new Error(`Invalid importance level: ${importance}. Use ImportanceLevel enum values.`); } return this.#repository.setImportance(entityId, importance); }
• src/sqlite/graph-repo.js:471-478 (helper)

  SQLite GraphRepository implementation: SQL UPDATE on observations table to set importance for all observations of the entity.
  async setImportance(entityId, importance) { const result = await this.db.run( 'UPDATE observations SET importance = ? WHERE entity_id = ?', [importance, entityId] ); return result.changes > 0; }
• src/postgres/graph-repo.js:509-518 (helper)

  PostgreSQL GraphRepository implementation: SQL UPDATE on observations table to set importance for all observations of the entity.
  async setImportance(entityId, importance) { const rows = await this.#query( `UPDATE observations SET importance = $1 WHERE entity_id = $2 RETURNING id`, [ importance, entityId ] ); return rows.length > 0; }