refactor(core): remove unused imports, helpers, and dead migration constant

Drops orphaned imports and the never-referenced V4 migration SQL constant
(V4 was inlined into runMigrations). Also drops the unused TypedEventEmitter
helper type and unused destructured values from stores.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

packages/core/src/agent-store.ts

@@ -62,15 +62,6 @@ export interface AgentStoreEvents {
   "rating:added": (rating: AgentRating) => void;
 }
 
-type TypedEventEmitter<Events extends Record<string, unknown[]>> = {
-  [K in keyof Events]: {
-    emit(event: K, ...args: Events[K]): boolean;
-    on(event: K, listener: (...args: Events[K]) => void): TypedEventEmitter<Events>;
-    once(event: K, listener: (...args: Events[K]) => void): TypedEventEmitter<Events>;
-    off(event: K, listener: (...args: Events[K]) => void): TypedEventEmitter<Events>;
-  };
-}[keyof Events] & EventEmitter;
-
 /** Options for AgentStore constructor */
 export interface AgentStoreOptions {
   /** Root directory for kb data (default: .fusion) */

packages/core/src/automation-store.ts

@@ -10,7 +10,7 @@ import type {
 } from "./automation.js";
 import { AUTOMATION_PRESETS, MAX_RUN_HISTORY } from "./automation.js";
 import type { ScheduleType } from "./automation.js";
-import { Database, toJsonNullable, fromJson } from "./db.js";
+import { Database, fromJson } from "./db.js";
 
 export interface AutomationStoreEvents {
   "schedule:created": [schedule: ScheduledTask];

packages/core/src/central-db.ts

@@ -184,10 +184,7 @@ const CENTRAL_SCHEMA_V3_CREATE_PEERS_SQL = CENTRAL_SCHEMA_V3_MIGRATION_SQL
   .filter((line) => !line.trim().startsWith("ALTER TABLE nodes ADD COLUMN"))
   .join("\n");
 
-const CENTRAL_SCHEMA_V4_MIGRATION_SQL = `
-ALTER TABLE nodes ADD COLUMN versionInfo TEXT;
-ALTER TABLE nodes ADD COLUMN pluginVersions TEXT;
-`;
+// V4 migration is applied inline via ALTER TABLE checks (see runMigrations).
 
 const CENTRAL_SCHEMA_V5_MIGRATION_SQL = `
 CREATE TABLE IF NOT EXISTS settingsSyncState (

packages/core/src/first-run.ts

@@ -27,7 +27,6 @@ import type {
   SetupCompletionResult,
   DetectedProject,
   RegisteredProject,
-  GlobalSettings,
 } from "./types.js";
 import type { CentralCore } from "./central-core.js";
 import { MigrationOrchestrator } from "./migration-orchestrator.js";

packages/core/src/insight-store.ts

@@ -28,8 +28,7 @@
 
 import { EventEmitter } from "node:events";
 import type { Database } from "./db.js";
-import { toJson, toJsonNullable, fromJson } from "./db.js";
-import { randomUUID } from "node:crypto";
+import { toJsonNullable, fromJson } from "./db.js";
 import type {
   Insight,
   InsightCreateInput,

packages/core/src/migration-orchestrator.ts

@@ -29,7 +29,6 @@ import type {
   MigrationOptions,
   MigrationResult,
   RegisteredProject,
-  IsolationMode,
 } from "./types.js";
 import type { CentralCore } from "./central-core.js";
 

packages/core/src/plugin-loader.ts

@@ -9,7 +9,7 @@
  * - Error isolation (plugin crashes don't crash the loader)
  */
 
-import { join, isAbsolute, resolve } from "node:path";
+import { isAbsolute, resolve } from "node:path";
 import { EventEmitter } from "node:events";
 import type { TaskStore } from "./store.js";
 import { PluginStore } from "./plugin-store.js";
@@ -21,7 +21,6 @@ import type {
   PluginRouteDefinition,
   PluginUiSlotDefinition,
   PluginRuntimeRegistration,
-  PluginState,
   PluginInstallation,
 } from "./plugin-types.js";
 import { validatePluginManifest } from "./plugin-types.js";

packages/core/src/plugin-store.ts

@@ -420,7 +420,7 @@ export class PluginStore extends EventEmitter<PluginStoreEvents> {
     id: string,
     updates: PluginUpdateInput,
   ): Promise<PluginInstallation> {
-    const plugin = await this.getPlugin(id);
+    await this.getPlugin(id);
     const now = new Date().toISOString();
 
     const setClauses: string[] = ["updatedAt = ?"];

packages/core/src/project-memory.ts

@@ -273,7 +273,7 @@ export async function ensureMemoryFileWithBackend(
     const result = await backend.write(rootDir, getDefaultMemoryScaffold());
     refreshQmdIfNeeded();
     return result.success;
-  } catch (err) {
+  } catch {
     // Non-writable backends (readonly) don't throw during bootstrap
     // This is intentional - bootstrap should not fail for non-writable backends
     // The error is caught and we return false to indicate no action was taken

packages/core/src/roadmap-store.ts

@@ -13,7 +13,6 @@
 
 import { EventEmitter } from "node:events";
 import type { Database } from "./db.js";
-import { toJsonNullable } from "./db.js";
 import type {
   Roadmap,
   RoadmapMilestone,
@@ -35,9 +34,7 @@ import type {
   RoadmapFeatureSourceRef,
 } from "./roadmap-types.js";
 import {
-  normalizeRoadmapMilestoneOrder,
   applyRoadmapMilestoneReorder,
-  normalizeRoadmapFeatureOrder,
   applyRoadmapFeatureReorder,
   moveRoadmapFeature,
 } from "./roadmap-ordering.js";
@@ -394,8 +391,6 @@ export class RoadmapStore extends EventEmitter<RoadmapStoreEvents> {
       throw new Error(`Milestone ${id} not found`);
     }
 
-    const roadmapId = milestone.roadmapId;
-
     // SQLite FK cascade will handle features
     this.db.prepare("DELETE FROM roadmap_milestones WHERE id = ?").run(id);
     this.db.bumpLastModified();

packages/core/src/routine-store.ts

@@ -10,7 +10,7 @@
 import { EventEmitter } from "node:events";
 import { randomUUID } from "node:crypto";
 import { CronExpressionParser } from "cron-parser";
-import { Database, toJson, fromJson } from "./db.js";
+import { Database, fromJson } from "./db.js";
 import {
   isCronTrigger,
   type Routine,

packages/core/src/settings-export.ts

@@ -7,11 +7,8 @@
  */
 
 import { writeFile, readFile, rename } from "node:fs/promises";
-import { existsSync } from "node:fs";
-import { join } from "node:path";
 import type { Settings, GlobalSettings, ProjectSettings } from "./types.js";
 import { TaskStore } from "./store.js";
-import { GlobalSettingsStore } from "./global-settings.js";
 
 /**
  * Structure for exported settings JSON.