Changelog

All notable changes to Engram are documented here.

0.1.0 — 2026-03-23

Initial MVP release.

MCP Server with 6 tools:
- create_conversation — Create new conversations with title, tags, metadata
- append_messages — Store verbatim messages with automatic chunking and embedding
- search — Semantic search across conversations using vector similarity
- get_conversation — Retrieve conversations with paginated messages
- list_conversations — List and filter conversations by agent, tags, sort order
- delete_conversation — Cascade delete conversations, messages, chunks, and vectors
Authentication — API key auth with SHA-256 hashing, expiration, and revocation
Database — D1 schema with 5 tables (organizations, api_keys, conversations, messages, conversation_chunks) and optimized indexes
Vector Search — Cloudflare Vectorize integration with bge-base-en-v1.5 embeddings (768 dimensions)
Sliding-Window Chunking — Messages automatically chunked with window=5, stride=3 for overlapping search coverage
Tenant Isolation — Organization-scoped data at every layer (D1, Vectorize, application)
Monorepo — pnpm workspaces + Turborepo with 3 packages:
- @getengram/shared — Types, Zod schemas, utilities
- @getengram/db — D1 migrations and typed query helpers
- @getengram/mcp-server — Deployable Cloudflare Worker
Test Suite — ~95 tests covering schemas, chunking, ID generation, auth, DB queries, conversation service, and HTTP endpoints
Seed Script — Generate test organizations and API keys for local development