ci(vue-sdk): add contract tests

[joker23]

SDK-2194

Adding fdv1 and fdv2 contract tests to vue sdk

---

Note

Low Risk
Changes are limited to CI, contract-test harness glue, and a documented optional type field; production Vue SDK runtime code is not modified in this diff.

Overview
Adds LaunchDarkly SDK contract-test coverage for the Vue client SDK by introducing a dedicated @launchdarkly/vue-contract-test-service workspace and wiring it into the vue.yml workflow.

The contract service is a small Vite Vue app that connects to the harness adapter over WebSocket (TestHarnessWebSocket), spins up real createClient / client.start() instances via ClientEntity, and implements harness commands (evaluate, identify, track, listeners, etc.) with config translation for streaming/polling, data-system connection modes, hooks, and secure-mode hash on start.

CI builds the SDK and test entity, runs the adapter, serves the built app, keeps a headless Playwright session open so the browser entity stays connected, then runs the shared contract-tests action twice (FDv1 and FDv2/v3) with skip lists for known REPORT/tag gaps. Shared SDKConfigClientSideParams gains an optional documented hash field for harness-supplied secure mode.

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[github-actions]

@launchdarkly/js-sdk-common size report
This is the brotli compressed size of the ESM build.
Compressed size: 26360 bytes
Compressed size limit: 29000
Uncompressed size: 129188 bytes

[github-actions]

@launchdarkly/js-client-sdk-common size report
This is the brotli compressed size of the ESM build.
Compressed size: 39108 bytes
Compressed size limit: 39300
Uncompressed size: 213642 bytes

[github-actions]

@launchdarkly/browser size report
This is the brotli compressed size of the ESM build.
Compressed size: 179691 bytes
Compressed size limit: 200000
Uncompressed size: 831704 bytes

[github-actions]

@launchdarkly/js-client-sdk size report
This is the brotli compressed size of the ESM build.
Compressed size: 32077 bytes
Compressed size limit: 34000
Uncompressed size: 114525 bytes

[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no potential bugs to report.

View in Devin Review to see 2 additional findings.

[cursor]

Cursor Bugbot has reviewed your changes using default effort and found 1 potential issue.

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[cursor]

FDv2 suppressions omit REPORT skips

Medium Severity

The FDv2 contract-test skip list only covers tag-related cases, while the FDv1 list and the browser SDK’s FDv2 suppressions also skip streaming and polling REPORT request tests (including evaluation-reason query variants). The Vue entity uses the same underlying client SDK and useReport wiring as the browser contract entity, so the v3 harness step is likely to hit failures that sibling SDKs already suppress.

 

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