ZBS Index What actually exists in applied AI, with the source next to it

Memory and context

Everything here was classified as memory and context by keyword match against the maintainer's own description, so treat the grouping as a starting point rather than a verdict.

The list is ordered by the most recent commit, not by stars. A popular project that stopped in 2024 is not a better answer than a smaller one shipped last week.

Worked on in the last 90 days (60)

Someone pushed a commit recently. This is the shortlist worth trying first.

  • Codebase Memory — last commit 2026-08-08, v0.9.0
    Codebase knowledge graph for AI agents — 159 languages, sub-ms queries, 99% fewer tokens.
  • io.github.dcostenco/prism-coder — last commit 2026-08-07, v20.7.1
    Session memory, knowledge search, Brave Search, Gemini AI, and code transforms for AI agents
  • io.github.dcostenco/prism-mcp — last commit 2026-08-07, v1.5.0
    Session memory, knowledge search, Brave Search, Gemini AI, and code transforms for AI agents
  • io.github.dnotitia/akb — last commit 2026-08-07, v2.0.4
    Git-backed org memory for AI agents — hybrid search, tables, files & a URI graph over MCP.
  • io.github.Hafeok/product-cli — last commit 2026-08-07, v0.2.0
    Knowledge graph CLI for managing features, ADRs, and test criteria as MCP-discoverable artifacts.
  • Engram — last commit 2026-08-07, v1.1.0
    Persistent memory for AI agents — verbatim conversations, searchable by meaning.
  • io.github.gitmem-dev/gitmem — last commit 2026-08-07, v1.2.1
    Persistent institutional memory for AI coding agents. Memory that compounds.
  • io.github.gowtham0992/link — last commit 2026-08-07, v2.2.1
    Local personal memory for agents as MCP tools — remember, recall, search, context, graph traversal.
  • io.github.GCTRL-TECH/gctrl — last commit 2026-08-06, v1.0.1
    Governed graph-native agent memory: knowledge extraction, fusion, hybrid RAG, scoped access tokens.
  • ClariLayer — last commit 2026-08-06, v0.31.0
    Individual-analyst context layer: recall, remember, and reconcile your data and engineering context.
  • rag-rat — last commit 2026-08-06, v0.22.0
    Repository intelligence, code graph, history, papertrail, and cross-agent memory for coding agents.
  • io.github.alphaonedev/ai-memory — last commit 2026-08-06, v0.5.1
    Persistent memory for any AI — zero token cost until recall
  • Bilinc — last commit 2026-08-06, v2.1.5
    Hosted agent memory with provenance, contradiction surfacing, and snapshot rollback.
  • nlqdb — analytical memory for AI agents — last commit 2026-08-06, v0.1.1
    Analytical memory for AI agents: a real Postgres queried in plain English over MCP. One command.
  • Citadel — last commit 2026-08-06, v1.13.0
    Encrypted-first embedded database with vector search and agent memory, exposed as MCP tools
  • Vault Cortex — last commit 2026-08-06, v0.35.0
    Standalone MCP server for Obsidian vaults — hybrid search, notes & files, memory, tasks, OAuth 2.1
  • VelesDB Memory — last commit 2026-08-06, v0.11.6
    Offline agentic memory: remember/recall/relate/forget/why over a fused vector+graph+columnar engine
  • io.github.cdeust/hypermnesia-mcp — last commit 2026-08-06, v4.17.1
    Persistent memory for Claude — 36 cited neuroscience mechanisms, local-first, hybrid retrieval.
  • io.github.cdeust/hypermnesia-mcp-viz — last commit 2026-08-06, v2.8.0
    Read-only visualization for Cortex memory, knowledge, sessions, traces, and codebase graphs.
  • io.github.ajc3xc/meridian — last commit 2026-08-06, v1.0.2
    Persistent memory, task coordination, and HITL queue for AI coding sessions.
  • coldstart — last commit 2026-08-06, v2.2.12
    Codebase memory for AI agents: an AST index plus agent-written notes that self-stale.
  • io.github.billy12151/memory-arbiter-mcp — last commit 2026-08-06, v0.2.0
    Shared memory store for AI coding tools with dual-timeline conflict arbitration.
  • Memorix — last commit 2026-08-06, v1.4.2
    Local-first persistent project memory for AI coding agents across MCP clients and sessions.
  • CPersona — last commit 2026-08-06, v2.5.3
    Persistent AI memory in one SQLite file: 3-layer hybrid search, confidence scoring, 29 tools.
  • adrkit decision memory — last commit 2026-08-06, v0.3.0
    Deterministic, offline, read-only ADR decision memory for coding agents. No model or network calls.
  • io.github.amirj4m/jamgate — last commit 2026-08-06, v0.11.2
    A neutral memory quality-gate MCP server: save_memory, recall_memory, forget_memory over stdio.
  • io.github.DanceNitra/inspeximus — last commit 2026-08-06, v2.1.2
    Self-correcting agent memory + MCP server: recall, supersede/revert/review corrections, erasure.
  • io.github.DanceNitra/mnemo — last commit 2026-08-06, v1.24.2
    Self-correcting agent memory + MCP server: recall, supersede/revert/review corrections, erasure.
  • Synap Memory — last commit 2026-08-06, v0.1.0
    Persistent memory for AI agents — log and recall conversation context over MCP.
  • Worldku Memory — last commit 2026-08-06, v0.1.0
    Save AI conversations into your Worldku memory and recall them from any MCP client.
  • shyn — last commit 2026-08-06, v0.4.23-alpha
    Local-first ambient memory for your Mac — pages, meetings, notes, encrypted on-device.
  • io.github.davidmosiah/delx-memory — last commit 2026-08-06, v0.2.3
    Local-first persistent memory MCP: shared SQLite key/value store, searchable, TTL-aware, secret-safe
  • io.github.0Mattias/bettermemory — last commit 2026-08-06, v3.41.0
    Memory for coding agents, checked against the filesystem and git before it is believed.
  • io.github.Cipher208/ariel-memory — last commit 2026-08-06, v1.0.0
    Two-layer memory MCP server for AI agents with 37 tools, RAG, graphs, wiki, auth
  • FastMCP server for Obsidian wikilink suggestions from a pre-computed knowledge g — last commit 2026-08-06, v0.1.0
    FastMCP server for Obsidian wikilink suggestions from a pre-computed knowledge graph (graphify…
  • FastMCP server for surgical queries against a vault knowledge graph (NetworkX no — last commit 2026-08-06, v0.1.0
    FastMCP server for surgical queries against a vault knowledge graph (NetworkX node-link JSON).…
  • io.github.Beever-AI/beever-atlas — last commit 2026-08-06, v0.3.0
    Open-source LLM knowledge base: team chat into a typed knowledge graph and auto-generated wiki.
  • Fodda Knowledge Graphs — last commit 2026-08-06, v1.32.1
    Expert-curated knowledge, brand, research & earnings intelligence — 31 tools, 220+ graphs.
  • io.github.camgitt/memoir — last commit 2026-08-06, v3.2.2
    Persistent memory for AI coding tools via MCP. Remembers across sessions and machines.
  • MCP Assist — Coordination Memory — last commit 2026-08-06, v0.3.0
    Coordination memory with verification: reconcile-against-GitHub, verdict freshness, provenance.
  • io.github.ashish-nativ/nativ — last commit 2026-08-05, v0.1.1
    AI-powered localization — translate, manage translation memory, and access style guides.
  • Nuzo Memory — last commit 2026-08-05, v1.1.0
    Local-first, auditable memory for MCP-compatible AI agents with explicit writes and SQLite storage.
  • io.github.batook22/project-knowledge-mcp — last commit 2026-08-05, v1.0.6
    Cross-project knowledge graph for MCP — map features across mobile, backend, and admin codebases.
  • io.github.darknodebros/elesync — last commit 2026-08-05, v1.23.15
    Local-first MCP memory vault: files you own, shared across ChatGPT, Claude, Gemini & any MCP client
  • io.github.codeledgerECF/codeledger — last commit 2026-08-05, v0.10.7
    Deterministic context selection for AI coding agents. Local memory that compounds across sessions.
  • Lians Agent Memory — last commit 2026-08-05, v0.5.0
    Bitemporal memory for AI agents with point-in-time recall and tamper-evident audit history.
  • agenttool — last commit 2026-08-05, v1.0.0
    Where agents arrive as themselves: DID identity, memory, wallet, inbox, covenants, jokes.
  • Nautilus Compass — last commit 2026-08-05, v1.6.2
    Drift-aware cross-agent memory · MCP/A2A · LongMemEval-S 56.6% · 1/15 Zep cost
  • io.github.brunosrz/vectora — last commit 2026-08-05, v0.1.0rc3
    AI assistant with RAG, web search, filesystem and memory. MCP sub-agent for Claude Code.
  • Exomem — last commit 2026-08-05, v0.38.0
    Local Markdown/Obsidian knowledge substrate for MCP agents with governed memory and hybrid search.
  • io.github.adelinamart/robrain — last commit 2026-08-05, v2.4.9
    Self-hosted decision memory for AI coding agents; warns before re-proposing a rejected approach.
  • io.github.botzrDev/dreamd — last commit 2026-08-05, v0.1.0
    Local-first, cross-harness memory for AI coding agents.
  • io.github.bobybarack/sovseal-memory — last commit 2026-08-05, v0.3.8
    Local-first, zero-knowledge AI memory across Claude, Cursor, and every MCP client. 0 RTT reads.
  • mail-index — last commit 2026-08-05, v1.0.0
    Local-first, read-only MCP server for recall over your Gmail: search, contacts, threads, digests.
  • Talamus — last commit 2026-08-05, v1.1.1
    Local-first, source-grounded memory that survives AI agent sessions.
  • ContextStream — last commit 2026-08-05, v0.5.35
    Persistent memory and cross-session learning for AI coding assistants (hosted remote MCP).
  • ContextStream MCP Server — last commit 2026-08-05, v0.4.81
    ContextStream MCP server for code context, memory, search, and AI tools.
  • io.github.cachly-dev/mcp-server — last commit 2026-08-05, v0.10.119
    Persistent memory + causal root-cause analysis for AI coding agents. 126 MCP tools. EU, GDPR.
  • Callosium — last commit 2026-08-04, v0.1.18
    One shared memory for every AI you use, in plain Markdown files you own.
  • ai.smithery/infranodus-mcp-server-infranodus — last commit 2026-08-04, v1.0.0
    Map text into knowledge graphs to create a structured representation of conceptual relations and t…

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How this page is ordered

Entries are grouped by whether anyone is still working on them, using the date of the most recent push to the repository. They are not ordered by stars, because a star is a bookmark somebody left once and never took back.

Where we have not checked an entry yet, it says so rather than being mixed in with the verified ones.