✨ [Shopify] Add a RUM SDK for Shopify Web Pixel app extensions

[BeltranBulbarellaDD]

Motivation

Shopify Web Pixel app extensions run in a sandboxed worker without DOM access. Collect checkout RUM events while continuing the session created by the storefront SDK.

Changes

• Add a Web Pixel SDK bundle that owns Shopify's single registration and reads settings.rumConfig.
• Capture browser.cookie internally and adapt its async get/set methods in the Shopify package. Supply the store directly to the shared session manager; public sessionPersistence keeps its existing browser options.
• Start checkout collection after analytics consent and translate Shopify events into RUM views, actions, and errors. Reuse shared cookie serialization and session lifecycle logic.
• Add unit tests, Web Pixel e2e coverage, bundle/deployment fixtures, and usage documentation.

Test instructions

• Passed: yarn lint, yarn typecheck, yarn format, yarn build, and 195 targeted unit tests covering cookie access, configuration, session storage, registration, and checkout collection.
• Rebuilt the local Shopify PoC. Existing lint and Shopify BigInt target warnings remain.
• For a manual check, load the local bundles in the PoC, grant analytics consent, note the storefront _dd_s_v2 session ID, then enter checkout and verify the same ID. The previous live PoC check confirmed matching IDs; the latest adapter relocation has unit coverage but has not been retested live.

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 Salesforce	N/A	185.81 KiB	N/A	N/A	N/A
Rum	185.65 KiB	185.79 KiB	+144 B	+0.08%	✅
Rum-salesforce Profiler	N/A	8.38 KiB	N/A	N/A	N/A
Rum Profiler	8.38 KiB	8.38 KiB	0 B	0.00%	✅
Rum-salesforce Recorder	N/A	31.94 KiB	N/A	N/A	N/A
Rum Recorder	31.94 KiB	31.94 KiB	0 B	0.00%	✅
Logs	59.57 KiB	59.71 KiB	+144 B	+0.24%	✅
Rum Slim	143.65 KiB	143.79 KiB	+144 B	+0.10%	✅
Worker	22.96 KiB	22.96 KiB	0 B	0.00%	✅
Rum Shopify-web-pixel	N/A	30.92 KiB	N/A	N/A	N/A
Rum Shopify	N/A	216.20 KiB	N/A	N/A	N/A
Rum-shopify Profiler	N/A	8.38 KiB	N/A	N/A	N/A
Rum-shopify Recorder	N/A	4.77 KiB	N/A	N/A	N/A

[datadog-official]

 

❌ Errors

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DataDog/browser-sdk | unit-bs: [chrome-mobile]

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ℹ️ Info

No other issues found (see more)

🧪 All tests passed
❄️ No new flaky tests detected

🎯 Code Coverage (details)
• Patch Coverage: 82.76%
• Overall Coverage: 77.23% (+0.03%)

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