chore(deps): upgrade major dependencies and ESLint 9

[itavy]

🔗 Related PR: adobe/aio-lib-ims#174

The remaining uuid vulnerability will be resolved once the above PR is merged and a new version of @adobe/aio-lib-ims is published.

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Summary

This PR upgrades all major dependencies to their latest compatible versions and migrates to ESLint 9 with flat config format.

Commit 1: Upgrade major dependencies

• jest: 29 → 30
• jest-junit: 16 → 17 (fixes uuid security vulnerability)
• typescript: 5 → 6
• globby: 14 → 16
• @adobe/aio-lib-ims (peer): 7 → 8

Commit 2: Upgrade to ESLint 9 with flat config

• eslint: 8.57.1 → 9.39.4 (latest v9)
• @adobe/eslint-config-aio-lib-config: 4.0.0 → 5.0.0
• Added: neostandard (replaces 6 eslint plugins)
• Removed: eslint-config-standard, eslint-plugin-{import,jest,n,node,promise}
• Migrated: .eslintrc.json → eslint.config.js (flat config format)

Test Plan

• All unit tests pass with 100% coverage
• Linting passes with new ESLint 9 flat config
• No breaking changes detected

Security Impact

• Before: 6 moderate vulnerabilities
• After: 5 moderate vulnerabilities
• Fixed: 1 vulnerability (uuid in jest-junit dev dependency)
• Remaining: 5 vulnerabilities in @adobe/aio-lib-ims@8 dependency tree

Note on Remaining uuid Vulnerability

The remaining 5 vulnerabilities are all the same issue:

• Issue: uuid < 14.0.0
• Chain: uuid → @azure/cosmos → @adobe/aio-lib-state → @adobe/aio-lib-ims@8
• Resolution: Will be fixed when chore: remove unused devDependencies aio-lib-ims#174 is merged and published

Deprecation Warnings

• Before: 7+ warnings (eslint@8, humanwhocodes packages, rimraf, glob, inflight)
• After: 3 warnings (all in jest@30 transitive dependencies)
• Improvement: Eliminated 4+ deprecation warnings

What Cannot Be Upgraded (Blocked)

ESLint 10

• Blocked by: @adobe/eslint-config-aio-lib-config@5 requires eslint ^9
• Status: On latest v9 (9.39.4)

Remaining Deprecations

All 3 warnings are transitive dependencies in jest@30:

• inflight@1.0.6, glob@7.2.3, glob@10.5.0
• Dev dependencies only, low risk
• Require upstream Jest/babel-plugin-istanbul updates

Files Changed

• package.json - dependency updates
• eslint.config.js - new flat config (added)
• .eslintrc.json - old config (removed)

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

📢 Thoughts on this report? Let us know!

[dthampy]

@itavy One thing I want to double check here is the peer dependency move from @adobe/aio-lib-ims@^7 to ^8.1.2. I understand we needed 8.1.2 for the audit cleanup , but it means consumers using aio-lib-ims-jwt with aio-lib-ims@7 will now get peer dependency issues, right?

[itavy]

@dthampy Great catch! You're absolutely right - this is a breaking change. Let me break down the implications:

Analysis

The concern is valid - changing from ^7 to ^8.1.2 has compatibility implications.

Impact:

1. Consumers on aio-lib-ims@7.x will get peer dependency warnings
2. This should be a major version bump (5.0.2 → 6.0.0), not a patch
3. We're enforcing a minimum version to ensure the uuid vulnerability is resolved

Options Considered:

Option A: Keep ^8 instead of ^8.1.2

• Less restrictive (allows 8.0.0+)
• Audit warnings persist for consumers on 8.0.x-8.1.1, but it's a false positive (nested copy not used at runtime)

Option B: Keep ^8.1.2 and release as v6.0.0 ⭐ RECOMMENDED

• Forces consumers to use the fixed version
• Released as major version (6.0.0) to properly signal breaking change
• Cleaner from security perspective - no audit warnings
• Once aio-lib-ims updates to depend on v6.0.0, the circular dependency resolves correctly

Option C: Revert to ^7

• Most conservative
• Keeps compatibility but maintains audit warnings

Key Insight:

We already introduced a breaking change in commit 1 by moving from ^7 to ^8. The question is just how restrictive to be within v8.

Since:

1. We're already breaking compatibility with v7
2. We should enforce the fixed version (8.1.2+) to eliminate audit warnings
3. Major version bump properly signals this to consumers

I recommend Option B - keep ^8.1.2 and release this as v6.0.0.

Question:

Is aio-lib-ims@7 still actively maintained, or is everything moving to v8 now? This would help determine if we need to maintain backwards compatibility or if a clean break is acceptable.

What do you think?

[itavy]

Update: Long-term Option D

After analyzing the codebase, I found that the circular dependency can be broken by extracting shared code!

Option D: Extract @adobe/aio-lib-ims-core ⭐ BEST LONG-TERM

Why the circular dependency exists:

• aio-lib-ims imports aio-lib-ims-jwt as a plugin
• aio-lib-ims-jwt only needs 2 methods: ims.getApiUrl() and ims.exchangeJwtToken()

Solution: Create new core package with just those methods:

aio-lib-ims-core (NEW)
├── Core IMS functionality (API URLs, token exchange)
└── Plugin interface definitions

aio-lib-ims-jwt
├── depends on: aio-lib-ims-core (NOT aio-lib-ims)
└── implements: ImsPlugin interface

aio-lib-ims
├── depends on: aio-lib-ims-core
└── depends on: aio-lib-ims-jwt (as plugin)

Benefits:

• ✅ No circular dependency (clean architecture)
• ✅ No audit false positives
• ✅ Easier to add more auth plugins
• ✅ Proper separation of concerns

Effort: ~1-2 weeks for extraction, refactoring, and testing

Implementation: Can be done as pre-releases (beta) to validate before stable

I've created a detailed proposal: Issue #79

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Recommendation

Short-term (this PR): Go with Option B - keep ^8.1.2, release as v6.0.0
Long-term: Consider Option D (core extraction) as outlined in #79

The short-term fix gets us moving now, while the long-term fix provides the cleanest architecture.

Thoughts?

[itavy]

⚠️ Additional Context: JWT is Deprecated

Important discovery: JWT authentication is officially deprecated as of June 30, 2025.

From Adobe Developer docs:

As of June 30, 2025, Service Account (JWT) credentials have reached their end of life and are no longer supported. All server-to-server integrations must use the OAuth Server-to-Server credentials.

Impact on Our Discussion

This changes the context for both short-term and long-term decisions:

For this PR (Option B):

• Still valid - existing JWT consumers need updates
• But consider: How long should we maintain JWT support?

For Option D (core extraction):

• Lower priority if JWT is sunset soon
• Higher priority if OAuth uses similar plugin architecture
• Questions: Does @adobe/aio-lib-ims-oauth use the same patterns? Would core extraction benefit OAuth implementation?

Key Questions for @dthampy:

1. What's the support timeline for JWT (immediate sunset vs. gradual deprecation)?
2. Is aio-lib-ims-oauth the recommended path forward?
3. Does OAuth benefit from the same architectural improvements?

Migration Guide: https://developer.adobe.com/developer-console/docs/guides/authentication/ServerToServerAuthentication/migration

This context should inform our decision on whether to invest in architectural refactoring vs. minimal maintenance mode.

[dthampy]

@itavy thanks for the breaking down the options. But I don't want to make a call myself here since this affects the public package contract. So I'd pull in @shazron and @purplecabbage to help confirm the right direction.

@shaz @jesse could you take a look at the peer dependency change here? The PR currently moves @adobe/aio-lib-ims from ^7 to ^8.1.2. That seems ok from the audit perspective, but that means it would drop compatibility with consumers still on v7 and likely means aio-lib-ims-jwt should be released as a major version. What direction do we want to go here?

[shazron]

@dthampy @itavy Definitely would need a major version change. From my experience with https://github.com/adobe/eslint-config-aio-lib-config#publishing- not doing one will break users as already mentioned.

As for Long Term Option D - I wouldn't bother. We just had a discussion where we are probably going to merge all the "ims plugins" into aio-lib-ims to reduce the complexity and most likely dropping the jwt plugin.