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Appendix B: Reference Implementation

@mvrx/mail is the TypeScript reference implementation of AECS-1. Core modules:

Module Spec coverage
parse() Full NormalizedEmail production from RFC 5322/MIME (§3§4, §6)
resolveThreadId() Threading algorithm (§5)
normalizeDate() Timestamp rules (§6)
EmailThread thread.position assignment (§4.4)

Conformance tests in packages/mail/test/core.test.mjs run every fixture in specs/conformance/fixtures/.