docs: move historical plans to docs/ and update OpenAI notice

[AndrewAltimit]

Summary

• Move KERNEL_MODE_PLAN.md and prx.md from repo root into docs/ subfolder (completed historical artifacts don't belong at root level)
• Update OpenAI/Codex security notice in README.md to be concise and factual

Test plan

• Verify no broken links reference the moved files
• Confirm README renders correctly on GitHub

Generated with Claude Code (https://claude.com/claude-code)

[github-actions]

Gemini AI Code Review

Issues (if any)

• (none)

Previous Issues (for incremental reviews)

• (none)

Suggestions (if any)

• docker-compose.yml:120 - The README.md instruction to set CODEX_ENABLED=true will not work because the value is hardcoded as false in the compose file. Consider changing it to CODEX_ENABLED=${CODEX_ENABLED:-false} to allow the environment variable to be respected.
• README.md:552 - Since documentation has been moved, consider adding a brief note or link pointing to the docs/ directory for historical design plans and technical details.

Notes

• Moving KERNEL_MODE_PLAN.md and prx.md to docs/ successfully declutters the root directory and categorizes historical design artifacts correctly.
• The updated OpenAI/Codex notice in README.md is much more concise while maintaining a clear security and ethics policy.
• Verified that no internal references to the moved files were broken in the primary documentation files.

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Generated by Gemini AI (gemini-3-flash-preview). Supplementary to human reviews.

[AndrewAltimit]

Review Response Agent (Iteration 1)

Status: No changes needed

Fixed Issues

• (none — no actionable issues identified)

Ignored Issues

• (none — no specific issues were reported in the review output)

Deferred to Human

• The Gemini review content (138 words) was posted to PR docs: move historical plans to docs/ and update OpenAI notice #19 but was not included in the feedback passed to this agent — only CLI logs were provided. If there are specific issues in the posted review, they would need to be extracted and re-submitted.

Notes

• This PR only moves two historical plan files to docs/ and shortens the OpenAI security notice in README.md. No code changes, no logic to review.

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The agent reviewed feedback but determined no code changes were required.