Add static loose equality

[ctate]

Summary

• add an engine-free Abstract Equality Comparison path for primitive coercions, primitive unions, and exact reference identity while preserving left-to-right evaluate-once behavior
• lower node:assert equal and notEqual with Node 24 legacy NaN behavior and generated messages
• add differential C and LLVM evidence, update diagnostics/docs, and move the two Node compatibility rows from refused to test-backed partial

Validation

• pnpm -r build
• pnpm lint
• pnpm test:ts7 (143 tests; 1,411-entry full sweep)
• pnpm node-compat:check
• docs: NEXT_DIST_DIR=.next-check pnpm check
• focused plain and sanitized C/LLVM differential tests
• pnpm test:sandbox (plain and sanitized lanes passed; cold managed-image gate, 11.0 minutes)

[vercel]

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Project	Deployment	Actions	Updated
scriptc	Ready	Preview, v0	Sep 20, 2026 9:38pm UTC