[mohammaddaoudfarooqi]

What this does

Moves the LangChain and Mastra cookbooks from mongodb-partners/partner-cookbooks into partners/:

• partners/langchain/advanced-rag/ — 3 notebooks: vector, full-text, hybrid $rankFusion, reranking, $graphLookup, auto-embedding
• partners/langchain/claude-code-mcp/ — 1 notebook: a LangGraph agent over the MongoDB MCP Server
• partners/mastra/ — 4 TypeScript notebooks (tslab kernel): retrieval, bring-your-own collections, hybrid search, agents with persistent memory

Nothing that already exists in this repository is modified except partners/README.md, which gains three table rows and a short Mastra entry. partners/langchain/ existing content is untouched; the new sets sit beside it.

Commits

1. Copy of partners/ at partner-cookbooks 56e1827, so the history shows what was imported. It is verbatim except partners/mastra/src/scrub.test.ts, whose fake credential fixtures are now assembled at runtime so GitGuardian does not flag them as live secrets.
2. Adaptation to this repository:
   • Each set has its own .env.example (partners/langchain/, partners/mastra/) instead of a repository-root one. Both config loaders already walk up from the notebook's folder, so no loader logic changed.
   • Colab badges and the utils.py download URL point at mongodb-developer/GenAI-Showcase.
   • The Mastra credential scan (npm test) covers only these eight notebooks rather than every notebook in the repository, and it no longer treats documented tunables such as ANTHROPIC_MODEL as secrets.
   • Small .gitignores for node_modules/ and __pycache__/.
   • This repository's pre-commit formatting: ruff on the Python files and Python notebook cells, and widget state on all notebooks. Ruff does not touch the TypeScript notebooks.
3. Refreshed outputs. All eight notebooks were re-executed from this repository against the pinned dependencies; the old Mastra outputs dated from @mastra/mongodb 1.15. The Mastra cells are now numbered, and a few prose passages that had drifted from their outputs are corrected.

Testing

All of the following ran from the new location on a branch checkout, against a live Atlas M0 cluster:

• pre-commit run --all-files: every hook passes, no files modified
• LangChain pytest test_utils.py: 29 passed
• Mastra from a fresh npm ci, including the tokenizer prefetch: npm test 86 passed and the credential scan is clean; npm run typecheck is clean; npm run smoke gives 8 passed, 1 skipped by design (M0 index budget)
• All 8 notebooks executed end to end with nbconvert --execute, with 0 errors. These are the committed outputs, each read against its notebook's prose.
• The cluster was left as it was found: only movies_vector_index and movies_fulltext_index, no scratch collections

Notes

• The Open in Colab badges and the utils.py fetch resolve once this is on main.
• Dependabot will raise one moderate alert for sprintf-js (GHSA-hp3w-g68c-fv3c) in partners/mastra/package-lock.json. No patched version exists. partners/mastra/README.md explains why neither path to it is reachable.

[gitguardian]

️✅ There are no secrets present in this pull request anymore.

If these secrets were true positive and are still valid, we highly recommend you to revoke them.
While these secrets were previously flagged, we no longer have a reference to the
specific commits where they were detected. Once a secret has been leaked into a git
repository, you should consider it compromised, even if it was deleted immediately.
Find here more information about risks.

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