fix(coding): remediate ML-07 plugin authority

electron/coding-plugins/project-service.ts

@@ -2,7 +2,6 @@ import path from 'node:path';
 import { atomicWriteJson, readJsonFile, type JsonFileWriter } from '../coding-projects/atomic-json';
 import { readCodingProjectConfigV2 } from '../coding-projects/project-config';
 import {
-  BUNDLED_CODING_PLUGIN_DEFINITIONS,
   DATA_SERVICE_PLUGIN_ID,
 } from '../../shared/coding-plugins';
 
@@ -98,7 +97,7 @@ function knownPluginIdSet(
 ): Set<string> {
   const source = typeof value === 'function'
     ? value()
-    : value ?? BUNDLED_CODING_PLUGIN_DEFINITIONS.map(({ id }) => id);
+    : value ?? [DATA_SERVICE_PLUGIN_ID];
   return new Set(source.map((id) => id.trim()).filter(Boolean));
 }
 
@@ -193,6 +192,7 @@ interface ReadSelectionResult {
 export class ProjectPluginService {
   private readonly mutationTails = new Map<string, Promise<unknown>>();
   private readonly managedInputRevisions = new Map<string, number>();
+  private readonly legacySelections = new Map<string, readonly string[]>();
 
   constructor(private readonly options: ProjectPluginServiceOptions = {}) {}
 
@@ -211,6 +211,7 @@ export class ProjectPluginService {
     const result = await this.readFile(filePath);
     const knownIds = knownPluginIdSet(this.options.knownPluginIds);
     if (result.file) {
+      this.legacySelections.delete(project);
       const enabledPluginIds = result.file.enabledPluginIds;
       return {
         projectPath: project,
@@ -225,7 +226,11 @@ export class ProjectPluginService {
       };
     }
 
-    const legacyProjectedPluginIds = await this.legacyProjectedPluginIds(project);
+    let legacyProjectedPluginIds = this.legacySelections.get(project);
+    if (!legacyProjectedPluginIds) {
+      legacyProjectedPluginIds = Object.freeze(await this.legacyProjectedPluginIds(project));
+      this.legacySelections.set(project, legacyProjectedPluginIds);
+    }
     const enabledPluginIds = [...legacyProjectedPluginIds];
     return {
       projectPath: project,