feat(mosaic): top-level mosaic config command (#408)

packages/mosaic/src/config/config-service.ts

@@ -1,6 +1,16 @@
 import type { SoulConfig, UserConfig, ToolsConfig, InstallAction } from '../types.js';
 import { FileConfigAdapter } from './file-adapter.js';
 
+/** Supported top-level config sections for dotted-key access. */
+export type ConfigSection = 'soul' | 'user' | 'tools';
+
+/** A resolved view of all config sections, keyed by section name. */
+export interface ResolvedConfig {
+  soul: SoulConfig;
+  user: UserConfig;
+  tools: ToolsConfig;
+}
+
 /**
  * ConfigService interface — abstracts config read/write operations.
  * Currently backed by FileConfigAdapter (writes .md files from templates).
@@ -16,6 +26,35 @@ export interface ConfigService {
   writeTools(config: ToolsConfig): Promise<void>;
 
   syncFramework(action: InstallAction): Promise<void>;
+
+  /**
+   * Return the resolved (merged) config across all sections.
+   */
+  readAll(): Promise<ResolvedConfig>;
+
+  /**
+   * Read a single value by dotted key (e.g. "soul.agentName").
+   * Returns undefined if the key doesn't exist.
+   */
+  getValue(dottedKey: string): Promise<unknown>;
+
+  /**
+   * Set a single value by dotted key (e.g. "soul.agentName") and persist.
+   * Returns the previous value (or undefined).
+   */
+  setValue(dottedKey: string, value: string): Promise<unknown>;
+
+  /**
+   * Return the filesystem path for a given config section file.
+   * When no section is provided, returns the mosaicHome directory.
+   */
+  getConfigPath(section?: ConfigSection): string;
+
+  /**
+   * Returns true if the mosaicHome directory exists and at least one
+   * config file (SOUL.md, USER.md, TOOLS.md) is present.
+   */
+  isInitialized(): boolean;
 }
 
 export function createConfigService(mosaicHome: string, sourceDir: string): ConfigService {