fix: remove unused imports and variables flagged by CodeQL

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/context.repoMap.test.ts

@@ -1,4 +1,4 @@
-import { describe, expect, test, mock, beforeEach } from 'bun:test'
+import { describe, expect, test } from 'bun:test'
 
 // The feature() function from bun:bundle is shimmed at build time.
 // In tests, it's not available, so we test the getRepoMapContext logic

src/context/repoMap/gitFiles.ts

@@ -1,5 +1,5 @@
 import { execFile } from 'child_process'
-import { readdirSync, statSync } from 'fs'
+import { readdirSync } from 'fs'
 import { join, relative } from 'path'
 import type { SupportedLanguage } from './types.js'
 

src/context/repoMap/pagerank.ts

@@ -20,8 +20,6 @@ export function rankFiles(
 ): RankedFile[] {
   if (graph.order === 0) return []
 
-  // Build personalization vector
-  const focusSet = new Set(focusFiles)
   const hasPersonalization = focusFiles.length > 0
 
   // graphology-pagerank accepts getEdgeWeight option

src/context/repoMap/repoMap.test.ts

@@ -1,5 +1,5 @@
 import { afterEach, beforeAll, describe, expect, test } from 'bun:test'
-import { cpSync, existsSync, mkdirSync, mkdtempSync, rmSync, utimesSync, writeFileSync } from 'fs'
+import { cpSync, mkdtempSync, rmSync, utimesSync, writeFileSync } from 'fs'
 import { tmpdir } from 'os'
 import { join } from 'path'
 import { invalidateCache, buildRepoMap } from './index.js'
@@ -134,7 +134,6 @@ describe('renderer', () => {
 
     // Every file header in the output should have its signatures listed
     for (const header of fileHeaders) {
-      const fileName = header.slice(0, -1) // remove trailing ':'
       // The file must have at least one signature line after it
       const headerIdx = result.map.indexOf(header)
       const afterHeader = result.map.slice(headerIdx + header.length)

src/tools/RepoMapTool/RepoMapTool.test.ts

@@ -1,8 +1,7 @@
-import { afterEach, beforeAll, describe, expect, test } from 'bun:test'
-import { cpSync, mkdtempSync, rmSync, writeFileSync } from 'fs'
+import { beforeAll, describe, expect, test } from 'bun:test'
+import { cpSync, mkdtempSync, rmSync } from 'fs'
 import { tmpdir } from 'os'
 import { join } from 'path'
-import { z } from 'zod/v4'
 import { initParser } from '../../context/repoMap/parser.js'
 import { invalidateCache } from '../../context/repoMap/index.js'
 import { RepoMapTool } from './RepoMapTool.js'
@@ -29,24 +28,6 @@ beforeAll(async () => {
   await initParser()
 })
 
-// Minimal context stub for tool.call
-function makeContext(root: string) {
-  // Patch getCwd to return our test root
-  process.env.__TEST_CWD_OVERRIDE = root
-  return {
-    abortController: new AbortController(),
-    getAppState: () => ({
-      toolPermissionContext: {
-        mode: 'default' as const,
-        additionalWorkingDirectories: new Map(),
-        alwaysAllowRules: {},
-        alwaysDenyRules: {},
-        alwaysAskRules: {},
-        isBypassPermissionsModeAvailable: false,
-      },
-    }),
-  } as any
-}
 
 describe('RepoMapTool schema', () => {
   test('validates a minimal input {}', () => {