[leoafarias]

Summary

• Align boundary parsing and exported null policies with effective wrapper and lazy-schema flags.
• Preserve explicit non-null assertions when an inner union or imported schema admits null.
• Add 37 parse/encode/export regressions covering native, union, imported, defaulted, and lazy schemas.

Stacked on #224 (release/2.0). This is the first layer of the 2.0 readiness cleanup; published alpha.1 notes remain unchanged.

Validation

• Confirmed 23 new regressions fail before the fix.
• Focused contract suite: 154 passed.
• Full core suite: 2,048 passed.
• JSON Schema conformance: 78 passed.
• Strict analysis and formatting passed.

CI and release preflight passed. The complete cleanup stack and coordinated alpha.2 preparation are linked from #237.

[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-10-26T16:19:00.560780Z	60261c4	Draft marked ready

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review" or "@codex security review".

Codex reacts with 👀 while any review is running, comments if it has suggestions, and reacts with 👍 once all reviews finish with no findings.