🚨 Prevent re-exporting values from @datadog/js-core

[BenoitZugmeyer]

Motivation

Re-exporting values from @datadog/js-core through other packages (e.g. @datadog/browser-core) makes them appear as if they belong to the re-exporting package. This creates misleading import paths for consumers and blurs package boundaries. Consumers should import these values directly from @datadog/js-core so the source of each utility is explicit.

Changes

• Added a local ESLint rule (disallow-re-exports-from-other-packages) that flags any export ... from "@datadog/js-core..." and reports a message directing consumers to import from @datadog/js-core directly
• Removed existing @datadog/js-core re-exports from browser-core, browser-logs, browser-rum, and browser-rum-slim entry points
• Updated all internal consumers to import the affected values directly from @datadog/js-core/util
• Ensured yarn typecheck covers the browser-rum-nextjs package

Test instructions

• Run yarn lint and confirm no disallow-re-exports-from-other-packages violations are reported
• Run yarn typecheck and confirm it passes
• In the sandbox, verify the SDK still initializes correctly (DD_LOGS.init() / DD_RUM.init()) since entry points no longer re-export ProxyFn, Site, ConsoleApiName, etc.

Checklist

• Tested locally
• Tested on staging
• Added unit tests for this change.
• Added e2e/integration tests for this change.
• Updated documentation and/or relevant AGENTS.md file

[cit-pr-commenter-54b7da]

Bundles Sizes Evolution

📦 Bundle Name	Base Size	Local Size	𝚫	𝚫%	Status
Rum	181.20 KiB	181.15 KiB	-49 B	-0.03%	✅
Rum Profiler	8.43 KiB	8.43 KiB	-1 B	-0.01%	✅
Rum Recorder	22.31 KiB	22.31 KiB	0 B	0.00%	✅
Logs	57.52 KiB	57.52 KiB	0 B	0.00%	✅
Rum Salesforce	N/A	139.23 KiB	N/A	N/A	N/A
Rum Slim	139.21 KiB	139.22 KiB	+6 B	+0.00%	✅
Worker	22.96 KiB	22.96 KiB	0 B	0.00%	✅
Rum Shopify	N/A	202.08 KiB	N/A	N/A	N/A
Rum-shopify Profiler	N/A	8.43 KiB	N/A	N/A	N/A
Rum-shopify Recorder	N/A	3.72 KiB	N/A	N/A	N/A

[datadog-datadog-prod-us1]

🎉 All green!

🧪 All tests passed
❄️ No new flaky tests detected

🎯 Code Coverage (details)
• Patch Coverage: 100.00%
• Overall Coverage: 77.12% (+0.00%)

_{This comment will be updated automatically if new data arrives.
🔗 Commit SHA: b3d9d1a | Docs | View more details | Give us feedback!}

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

💡 Codex Review

Here are some automated review suggestions for this pull request.

Reviewed commit: c730f953a6

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