README

AI-powered product recommendations for Magento 2 — semantic related, cross-sell, and up-sell suggestions driven by vector embeddings, with optional LLM re-ranking and behaviour-based personalization.

This README describes only what the code does today. Planned and partially-built features live in ROADMAP.md; an honest feature-by-feature breakdown is in dev/demo/AUDIT.md.

Status

Productization phases 0–4 are implemented and unit-tested (128 unit + 3 integration tests, phpcs-clean on all new code). The pluggable vector store and the never-empty fallback are wired into the live serving path (RecommendationService). Items that require a running stack — admin analytics dashboard UI + JS beacon, GDPR export/erase framework wiring, and all live-environment gate evidence (Luma indexing, hit-rate, CI-green-on-PR) — are listed in ROADMAP.md.

What it does

• Semantic related / cross-sell / up-sell via nearest-neighbour search over product embeddings, injected into the native Magento blocks through plugins.
• Pluggable vector store behind Api/VectorStoreInterface:
  • ChromaDB (existing).
  • Search Engine — your store's OpenSearch/Elasticsearch via k-NN (no extra infra).
• Pluggable embeddings behind Api/EmbeddingProviderInterface:
  • Hosted API (OpenAI-compatible, e.g. text-embedding-3-small) — recommended default.
  • ChromaDB embedding-service (self-hosted Python, all-MiniLM-L6-v2).
• Never-empty block: a fallback chain (primary → same-category → Magento native) keeps the slot populated even when the AI backend is down (Service/Fallback/FallbackSelector).
• Personalized recommendations (browsing / purchase / wishlist / "Just for you") with REST + GraphQL APIs.
• Optional LLM re-ranking (Claude / OpenAI) — off by default.

Requirements

• Magento 2.4.6–2.4.8, PHP 8.1–8.3.
• A vector store: either OpenSearch/Elasticsearch (already required by Magento) or ChromaDB.
• For hosted embeddings: an API key (OpenAI/Voyage/compatible).

Install in 3 minutes (no extra infra)

Uses your existing OpenSearch + a hosted embeddings API — no ChromaDB, no Python container.

# 1. Add the module (or copy into app/code/NavinDBhudiya/ProductRecommendation)
bin/magento module:enable NavinDBhudiya_ProductRecommendation
bin/magento setup:upgrade
bin/magento setup:di:compile

# 2. Configure (Stores > Configuration > NavinDBhudiya > AI Product Recommendation):
#    - Embedding > Embedding Provider = "Hosted API"; set API key + model (text-embedding-3-small)
#    - Vector Store > Backend = "Search Engine (OpenSearch/Elasticsearch k-NN)"
#      (set host/port if not the defaults opensearch:9200)

# 3. Index + verify
bin/magento recommendation:index
bin/magento recommendation:health     # expect green + X/Y coverage

Prefer ChromaDB? Set Vector Store = ChromaDB and Embedding Provider = ChromaDB, then run the embedding-service container (see docker/) — see CLAUDE.md for the ChromaDB path.

CLI commands

All commands use the recommendation:* namespace.

Architecture

Product save / recommendation:index
        │
        ▼
EmbeddingProviderInterface  ──►  VectorStoreInterface  (ChromaDB | Search Engine k-NN)
 (Hosted API | ChromaDB)
        ▲                                 │
        │                                 ▼
PDP / cart blocks ──► RecommendationService ──► nearest neighbours
                              │
                              ├─ optional LLM re-rank (off by default)
                              └─ FallbackSelector: primary → same-category → native

• Api/VectorStoreInterface — upsert / query / delete / count / ping. Implementations: Service/VectorStore/ChromaVectorStore, Service/VectorStore/SearchEngineVectorStore (selected by config via VectorStoreFactory).
• Api/EmbeddingProviderInterface — implementations: ApiEmbeddingProvider, ChromaDBEmbeddingProvider (selected via EmbeddingProviderFactory).
• REST: etc/webapi.xml. GraphQL: etc/schema.graphqls.

APIs

• REST — e.g. GET /V1/recommendation/personalized/justforyou.
• GraphQL — personalizedRecommendations(type: JUST_FOR_YOU, limit: 8) { items { sku name } }.

Testing

No Warden required:

bash dev/demo/run-tests.sh            # unit + integration + phpcs
bash dev/demo/run-tests.sh --unit
composer test                          # if composer is available

See CLAUDE.md for the PHPUnit-10 / Magento classmap caveat and the test launcher.

License

MIT. Author: Navin Bhudiya.