Vistara — Day 3 Devlog

Date: August 17, 2026
Focus: Keyword Search + Chunking

Today I expanded Local Google from basic keyword search into chunk-based search.

Completed

• SQLite FTS5 keyword search
• BM25 relevance ranking
• Sensitive-file filtering
• Search result formatting
• 500-word text chunking
• chunks database table
• chunks_fts FTS5 index
• Backfilled chunks for existing documents
• Chunk-based keyword search
• Search-result snippets from matching chunks
• Best matching chunk per document to reduce duplicates

Result

Local Google can now search through document chunks instead of treating every document as one giant piece of text.

The original Day 4 chunking work was moved into Day 3 because most of it was completed today.

Next

Finish the remaining ranking polish, then move toward semantic search with embeddings.

Day 3: Completed ✅