feat(e2e): MSW cassette layer for hermetic e2e tests#1920

Draft

Stephen Belanger (Qard) wants to merge 8 commits intomainfrom

t3code/e2e-vcr-capture

Commits on May 5, 2026

feat: add @braintrust/seinfeld as a dev workspace package

Stephen Belanger (Qard)
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Claude (claude)
committed
feat(e2e): replace hand-rolled VCR layer with @braintrust/seinfeld

Stephen Belanger (Qard)
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Claude (claude)
committed
fix(ci): fix formatting and dead-code checks for seinfeld package

Stephen Belanger (Qard)
and
Claude (claude)
committed
fix(seinfeld): add process-level ctx fallback for start()/stop() preload use

Stephen Belanger (Qard)
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Claude (claude)
committed
fix(e2e): use .cassette.json extension to match seinfeld's JsonFileStore

Stephen Belanger (Qard)
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Claude (claude)
committed
fix(e2e): fix SSE chunk splitting and URL normalization in cassette conversion

Stephen Belanger (Qard)
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Claude (claude)
committed
fix(e2e): fix all hermetic CI failures

Stephen Belanger (Qard)
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Claude (claude)
committed
fix(e2e): fix URL normalization, SSE streaming, and AI SDK body matching

Stephen Belanger (Qard)
and
Claude (claude)
committed