docs: add Claude repository routing

[jamesbhobbs]

Summary

• make CLAUDE.md the concise canonical agent guide
• make AGENTS.md a symlink to CLAUDE.md
• route agents to authoritative repository documentation instead of broad traversal
• document relationships with adjacent Deepnote repositories

Validation

• pre-commit whitespace, EOF, large-file, and secret checks passed
• local routing targets and reciprocal repository links verified
• Prettier markdown check passed

Summary by CodeRabbit

• Documentation
  • Added a concise project overview and contributor guidance.
  • Added navigation links to relevant documentation, configuration, and related repositories.
  • Consolidated contributor instructions through a shared documentation reference.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 7d8dabca-8a70-444e-b2b2-874418f7d539

📥 Commits

Reviewing files that changed from the base of the PR and between 6198101 and aead200.

📒 Files selected for processing (2)

• AGENTS.md
• CLAUDE.md

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📝 Walkthrough

Walkthrough

CLAUDE.md now provides a concise Deepnote Toolkit overview, working rules, and documentation routing table. AGENTS.md links symbolically to CLAUDE.md.

Estimated code review effort: 1 (Trivial) | ~3 minutes

Suggested reviewers: m1so, mfranczel, tkislan

🚥 Pre-merge checks | ✅ 6

✅ Passed checks (6 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the repository routing documentation added by the pull request.
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.
Updates Docs	✅ Passed	The commit changes only CLAUDE.md and AGENTS.md; it implements no feature, so the feature-documentation requirement is not applicable.

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[github-actions]

📦 Python package built successfully!

• Version: 2.4.0.dev2+f13ebdd
• Wheel: deepnote_toolkit-2.4.0.dev2+f13ebdd-py3-none-any.whl
• Install:

  pip install "deepnote-toolkit @ https://deepnote-staging-runtime-artifactory.s3.amazonaws.com/deepnote-toolkit-packages/2.4.0.dev2%2Bf13ebdd/deepnote_toolkit-2.4.0.dev2%2Bf13ebdd-py3-none-any.whl"

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 74.42%. Comparing base (6198101) to head (aead200).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #115   +/-   ##
=======================================
  Coverage   74.42%   74.42%           
=======================================
  Files          95       95           
  Lines        5704     5704           
  Branches      850      850           
=======================================
  Hits         4245     4245           
  Misses       1182     1182           
  Partials      277      277           

Flag	Coverage Δ
combined	74.42% <ø> (ø)

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