YAMS — Yet Another Memory System

Persistent memory for LLMs and apps. Content‑addressed storage with dedupe, compression, full‑text and vector search.

Warning

Experimental Software - Not Production Ready

YAMS is under active development and should be considered experimental. The software may contain bugs, incomplete features, and breaking changes between versions. Use at your own risk.

For production workloads, please wait for a stable 1.0 release.

Features

• SHA‑256 content‑addressed storage
• Block‑level dedupe (Rabin)
• Full‑text search (SQLite FTS5) + semantic search (embeddings)
• WAL‑backed durability, high‑throughput I/O, thread‑safe
• Portable CLI and MCP server
• Extensible with Plugin Support

Links

• SourceHut: https://sr.ht/~trvon/yams/
• GitHub mirror: https://github.com/trvon/yams
• Docs: https://yamsmemory.ai
• Discord: https://discord.gg/rTBmRHdTEc
• License: GPL-3.0-or-later

Install

Supported platforms: Linux x86_64/ARM64, macOS x86_64/ARM64

# Quick build (auto-detects Clang/GCC, configures Conan + Meson)
./setup.sh Release

# Build
meson compile -C build/release

# Optional: Install system-wide
meson install -C build/release

Prerequisites:

• Compiler: GCC 13+ or Clang 16+ (C++20 minimum)
• Build tools: meson, ninja-build, cmake, pkg-config, conan
• System libs: libssl-dev, libsqlite3-dev, protobuf-compiler

See docs/BUILD-GCC.md for detailed build instructions, compiler configuration, Conan profiles, and troubleshooting.

Quick Start

export YAMS_STORAGE="$HOME/.local/share/yams"
yams init --non-interactive

# add
echo hello | yams add - --tags demo

# search
yams search hello --limit 5

# get
yams list --format minimal --limit 1 

Path-Tree Search (Experimental)

Enable hierarchical index for faster prefix/path scans in config.toml:

[search.path_tree]
enable = true
mode = "preferred" # or "fallback" to keep legacy scans as backup

Optimizes yams grep with explicit path prefixes via listPathTreeChildren index.

MCP

yams serve  # stdio transport

MCP config (example):

{
  "mcpServers": { "yams": { "command": "/usr/local/bin/yams", "args": ["serve"] } }
}

Troubleshooting

Build issues: See docs/BUILD-GCC.md for compiler setup, Conan profiles, and dependency resolution.

Plugin discovery: Verify with yams plugin list. If empty:

• Check trusted directories: yams plugin trust list
• Add plugin path: yams plugin trust add ~/.local/lib/yams/plugins
• Verify shared libs: ldd libyams_onnx_plugin.so

Monitor: yams stats --verbose and yams doctor for diagnostics.

Cite

@misc{yams,
author = {Trevon Williams},
title = {yams: Content addressable storage with excellent search },
year = {2025},
publisher = {GitHub},
url = {https://github.com/trvon/yams}
}