✅ Complete: Successfully removed dependency on uuid package and replaced with Node.js built-in

Summary of Changes Made:

• Analyzed the repository and identified uuid package usage
• Found that uuid is used in libraries/rush-lib/src/api/CobuildConfiguration.ts (line 87) to generate a random cobuild runner ID
• Confirmed Node.js version requirement is >=18.15.0 which supports crypto.randomUUID() (available since Node.js v15.6.0)
• Set up repository build environment and installed dependencies
• Replace import { v4 as uuidv4 } from 'uuid' with import { randomUUID } from 'node:crypto'
• Update the function call from uuidv4() to randomUUID()
• Remove uuid dependency from package.json
• Remove @types/uuid devDependency from package.json
• Run tests to ensure functionality is preserved
• Build and validate changes
• Update lockfile to remove uuid package completely
• Verified that randomUUID generates proper UUID v4 format strings
• All tests pass - no functionality is broken
• Purged temp files and re-verified clean state
• Final comprehensive testing confirms everything works correctly
• Generated rush change file for change tracking and changelog

Technical Details:

• Files modified: libraries/rush-lib/src/api/CobuildConfiguration.ts, libraries/rush-lib/package.json
• Dependencies removed: uuid ~8.3.2, @types/uuid ~8.3.4
• Replacement: Node.js built-in crypto.randomUUID() function
• Functionality: Generates proper UUID v4 format strings identical to the previous uuid package
• Compatibility: Works with Node.js >=15.6.0 (repository requires >=18.15.0)
• Change file: Added common/changes/@microsoft/rush/copilot-fix-7b47235e-8acb-4963-a955-6ee097ae90bc_2025-09-16-21-58.json

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