docs: arXiv badge + paper link; commit AGENTS.md; ignore arxiv bundle

[matteso1]

• README: arXiv badge (2606.15621) in the badge row + the canonical arXiv link on the refeed-drift paper line (PDF + source links kept).
• AGENTS.md committed (the Codex-session twin of CLAUDE.md).
• .gitignore the local paper/refeed-drift/arxiv-upload/ bundle.

thaw-lint clean with AGENTS.md tracked; git status now has zero untracked clutter.

Summary by CodeRabbit

• Documentation
  • Expanded the project README with a new research entry and quick links to the paper, PDF, and source/data.
  • Added a detailed project status and roadmap guide for easier handoff and future development.
• Chores
  • Updated ignore rules to exclude a generated local submission bundle from version control.

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1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
site	Ignored	Preview	Jun 25, 2026 1:27am

[coderabbitai]

Caution

Review failed

Pull request was closed or merged during review

📝 Walkthrough

Walkthrough

Updated the README with an arXiv badge and research entry, ignored the generated arXiv upload bundle, and replaced AGENTS.md with a detailed thaw roadmap covering architecture, shipped state, gaps, priorities, constraints, team, and session-file references.

Changes

Repository notes and release housekeeping

Layer / File(s)	Summary
Publication links and upload ignore README.md, .gitignore	README.md adds an arXiv badge and June 2026 research entry, and .gitignore excludes paper/refeed-drift/arxiv-upload/.
Roadmap framing and benchmarks AGENTS.md	AGENTS.md adds the fork-primitive definition, benchmark/receipt notes, and the repository architecture breakdown.
Shipped state, gaps, and next steps AGENTS.md	AGENTS.md lists shipped capabilities, missing capabilities, ranked next steps, and the business progression section.
Constraints, roster, and session files AGENTS.md	AGENTS.md adds environment and build constraints, the team roster, and the key-files list for new sessions.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

Poem

Hoppity hop, I sketched the page,
With arXiv links and roadmap sage.
I tucked the upload scratch away,
And marked the thaw for another day.
🐇 Thump-thump—docs bloom in springtime glaze.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The description is missing the required 'What & why', 'How was it verified', and checklist sections from the template.	Rewrite it using the repository template, add the required section headings, list verification commands/results, and complete the checklist items.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title is concise and accurately describes the README, AGENTS.md, and .gitignore documentation/tracking changes.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch chore/arxiv-badge-and-agents-md

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