Migrate from @azure/core-http to @azure/core-rest-pipeline and upgrade undici to v7

[Copilot]

Migration Plan: Replace @azure/core-http with @azure/core-rest-pipeline

• Update artifact package dependencies
  • Remove @azure/core-http dependency from package.json
  • Add @azure/core-rest-pipeline dependency
• Update artifact package code
  • Replace import from @azure/core-http-compat to @azure/core-rest-pipeline in blob-upload.ts
• Update package-lock.json
  • Run npm install to update lockfiles
• Verify no other usages of @azure/ms-rest-js exist
• Build and test changes
  • Build the artifact package
  • Run tests for artifact package (all 106 tests passed)
• Initial verification
  • Run linter
  • Security checks
• Update undici to version 7
  • Update http-client package to use undici ^7.0.0
  • Update github package to use undici ^7.0.0
  • Update attest package to use undici ^7.0.0
  • Update github package to depend on http-client ^3.0.0
  • Update core package @types/node to ^24.1.0 for compatibility
  • Build all packages successfully
• Final verification
  • Run tests for updated packages (github: 16 passed, attest: 26 passed)
  • Build all packages successfully
  • Run linter (passed)
  • Security checks (CodeQL: no alerts, gh-advisory: no vulnerabilities)
  • Ensure package symlinks are correct for monorepo development
• Version bumps and documentation
  • Bump http-client version to 3.1.0
  • Bump github version to 6.1.0
  • Bump attest version to 2.2.0
  • Update RELEASES.md for http-client
  • Update RELEASES.md for github
  • Update RELEASES.md for attest
• Fix CI build failures
  • Add undici ^7.0.0 to npm overrides in root package.json
  • Clean rebuild and test all packages
  • Verify TypeScript compilation succeeds

Summary

Successfully migrated from deprecated Azure SDK packages and upgraded undici to v7:

• ✅ Removed @azure/core-http from artifact package
• ✅ Upgraded to @azure/core-rest-pipeline
• ✅ Upgraded undici from v5/v6 to v7 across http-client, github, and attest packages
• ✅ Bumped package versions and updated release notes
• ✅ Fixed CI build failures by adding undici override
• ✅ All tests passing
• ✅ No security vulnerabilities
• ✅ TypeScript compilation successful

Original prompt

---

This section details on the original issue you should resolve

<issue_title>migrate off @azure/ms-rest-js and @azure/core-http</issue_title>
<issue_description>Consider move to the more modern @azure/core-rest-pipeline

• https://github.com/search?q=repo%3Aactions%2Ftoolkit+%40azure%2Fcore-http&type=code
• https://github.com/search?q=repo%3Aactions%2Ftoolkit%20%40azure%2Fms-rest-js&type=code

</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes migrate off @azure/ms-rest-js and @azure/core-http #1836

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[salmanmkc]

@copilot We should probably bump http-client, github and attest in package.json and add to their readme about this change if it was modified

[Copilot]

@copilot We should probably bump http-client, github and attest in package.json and add to their readme about this change if it was modified

Done! Version bumps and release notes added in commit de5ed03:

• http-client: 3.0.0 → 3.1.0
• github: 6.0.1 → 6.1.0
• attest: 2.1.0 → 2.2.0

Updated RELEASES.md for all three packages to document the undici v7 upgrade.

[salmanmkc]

Your pipeline runs have failed, have a look @copilot

[Copilot]

Your pipeline runs have failed, have a look @copilot

Fixed in commit b5bb4b9. The CI failures were caused by TypeScript type mismatches between two different versions of undici in the dependency tree. Added undici: "^7.0.0" to npm overrides in the root package.json to force all packages to use undici v7.

The build and tests now pass successfully.

[salmanmkc]

Which dependencies were on different versions, are they within toolkit that we can upgrade? @copilot

[Copilot]

Which dependencies were on different versions, are they within toolkit that we can upgrade? @copilot

The version conflicts were in the toolkit packages themselves:

Before the fix:

• @actions/github@6.1.0 depends on @actions/http-client@^3.0.0 (from npm registry)
• Published @actions/http-client@3.0.0 has undici@^5.28.5
• But locally we updated to undici@^7.0.0

This created a nested dependency tree where github had both undici v7 (direct) and v5 (via http-client), causing TypeScript type conflicts.

The fix:
Added undici: "^7.0.0" to root package.json overrides, which forces all packages (including nested dependencies) to use undici v7.

Note:

• @actions/attest@2.2.0 depends on @actions/http-client@^2.2.3 (which has undici v5)
• These versions haven't been published yet (3.1.0, 6.1.0, 2.2.0)
• Once published with undici v7, the override won't be needed, but it doesn't hurt to keep it for consistency