[ucguy4u]

Summary

Semantic search now prefers Google's generic EmbeddingGemma 2 text package (embeddinggemma-2-text-270m.litertlm, 164,626,432 bytes) through LiteRT-LM EmbeddingEngine. Search prompts use EmbeddingGemma 2's task prefixes, and the engine loads with a 512-token input.

The older EmbeddingGemma 300M .tflite file and its tokenizer stay in the catalog. If that file is already installed, search keeps using it through the RAG SDK. A new install is asked for EmbeddingGemma 2 and does not need a separate tokenizer.

Test Plan

• dart analyze on the embeddings and catalog files
• flutter test for embedding_client_test, embedding_service_test, and model_catalog_test (34 tests)
• scripts/check-docs-completeness.sh --base origin/main --head HEAD
• Manual device verification documented, or not applicable

Verification environment: Host-only. The Kotlin EmbeddingEngine call was checked against the litertlm-android 0.18.0 API. It was not run on a device.

Agent Policy

• Linked issue includes a Critical Agent Gate.
• Linked issue includes a Feature Packet or documents why one is not needed.
• Cross-agent contract is documented for framework/application boundary work. This stays inside core_ai and the existing Android LiteRT plugin.
• Deterministic use cases and automation flows are linked or included.
• AI/tool/memory/routine changes include eval, trace, and redaction coverage. Embedding tests cover the prefix, the no-tokenizer path, and the already-installed 300M preference.
• Android Emulator was not used.

Council Review

• Media Intelligence Architect: catalog and embedding runtime change

• Flutter Architect: core_ai embedding client and service

• Platform Architect: Android LiteRT plugin methods

• I checked the Decision Matrix and listed every required role above.

• Every package touched has a module.yaml.

• owner/reviewers in any touched module.yaml still match who actually reviewed this PR.

  

[github-actions]

Plugin Module Size Gate

Policy: modules over 3 MB must be delivered as plugins; plugin modules over 5 MB must document cache management.

Module	Size	Type	Status
packages/core_ai	0.59 MB	bundled	OK

[github-actions]

🚀 PR Quick Check Summary

Check	Status	Description
PR Validation	❌ failure	Title format, docs, bundled model guardrail
Code Quality	✅ success	Analyze, formatting
Core Tests	✅ success	Core package unit tests
Airo Mind Shell	✅ success	Mind flavour analyze, tests, entrypoint compile

💡 Note: Full app tests, coverage reports, and security scans run on merge to main.

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