Avalon Memory Crystal Server (amcs)

A Go MCP server for capturing and retrieving thoughts, memory, and project context. Exposes tools over Streamable HTTP, backed by Postgres with pgvector for semantic search.

What it does

• Capture thoughts with automatic embedding and metadata extraction
• Search thoughts semantically via vector similarity
• Organise thoughts into projects and retrieve full project context
• Summarise and recall memory across topics and time windows
• Link related thoughts and traverse relationships

Stack

• Go — MCP server over Streamable HTTP
• Postgres + pgvector — storage and vector search
• LiteLLM — primary AI provider (embeddings + metadata extraction)
• OpenRouter — default upstream behind LiteLLM

Tools

Tool	Purpose
capture_thought	Store a thought with embedding and metadata
search_thoughts	Semantic similarity search
list_thoughts	Filter thoughts by type, topic, person, date
thought_stats	Counts and top topics/people
get_thought	Retrieve a thought by ID
update_thought	Patch content or metadata
delete_thought	Hard delete
archive_thought	Soft delete
create_project	Register a named project
list_projects	List projects with thought counts
get_project_context	Recent + semantic context for a project
set_active_project	Set session project scope
get_active_project	Get current session project
summarize_thoughts	LLM prose summary over a filtered set
recall_context	Semantic + recency context block for injection
link_thoughts	Create a typed relationship between thoughts
related_thoughts	Explicit links + semantic neighbours

Configuration

Config is YAML-driven. Copy configs/config.example.yaml and set:

• database.url — Postgres connection string
• auth.keys — API keys for MCP endpoint access
• ai.litellm.base_url and ai.litellm.api_key — LiteLLM proxy

See llm/plan.md for full architecture and implementation plan.