PR Review — Introduce HostObject for Go values with methods and unexported fields

Decision

Needs Clarification

Merge Readiness Summary

The implementation is technically excellent: HostObject is well-designed, thoroughly tested, and integrates cleanly into the existing architecture via the new types.Fielded interface. CI passes. However, the PR cannot merge until the description and issue link are provided—these are essential for understanding motivation, scope, and maintainability.

Blocking Findings

1. Empty PR Description

The PR body is incomplete. It contains empty sections for "Changes Made", "Related Issues", and "Additional Information".

Why it matters:

• Reviewers and future maintainers need to understand the motivation and use cases for HostObject
• No issue link makes it impossible to trace back to the original requirement
• The change is substantial (527 additions) and warrants clear documentation

Minimal fix:
Fill in the PR description with:

• What problem does HostObject solve? (e.g., "enables Go values with methods and private fields to be passed through Marshal")
• Use cases or examples
• Link to the related issue
• Any deployment or compatibility notes (if applicable)

2. No Linked Issue

The PR has no linked GitHub issue. The ### **Related Issues** section is empty.

Why it matters:

• Issue tracking provides context for code review and future maintenance
• Linking PRs to issues maintains the audit trail

Minimal fix:
Link the PR to the issue that requested this feature using GitHub's issue linking (type Fixes #123 or similar in the description).

Important Findings

None. The implementation itself is solid.

Suggestions

None. Code quality is high.

Questions

1. Is HostObject intended as a public API or internal implementation? (Affects documentation scope)
2. Are there any performance implications for field access via reflection that users should be aware of?

Readiness Checklist

• Scope control: Pass — Feature is well-contained and focused
• Correctness: Pass — Implementation is sound, edge cases handled
• Test coverage: Pass — Comprehensive tests cover happy path, mutations, field shadowing, unmarshal
• Architecture consistency: Pass — Clean types.Fielded interface, no breaking changes
• Risk / compatibility: Pass — STRUCT_GET/STRUCT_SET dispatch properly abstracted
• Maintainability: Pass — Code is clear, well-commented, consistent with codebase patterns
• CI / validation: Pass — All checks pass (ubuntu-24.04 @ Go 1.26.2 success)

Minimal Path to Merge

1. Fill in the PR description with motivation, use cases, and examples
2. Link the PR to the related GitHub issue
3. Re-request review

Suggested Follow-up Issues

None. This change is complete as-is.

Final Recommendation

Add missing context. The code is ready; the documentation is not. Complete the PR description and issue link, then merge.

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