What is cross-session-memory?

A self-hosted memory and continuity system for Claude Code, the coding assistant that works in a development project. It stores information about ongoing work so later sessions can pick up where earlier ones ended.

Managing long-term memory, goals, checkpoints, work records, onboarding, handoffs, and session lifecycle events using PostgreSQL or SQLite.

It reduces the need to re-explain project context after a session ends, the conversation is shortened, or work is handed off.

cross-session-memory — Plugin for Claude Code by NovasPlace/CSM

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo

git clone --depth 1 https://github.com/NovasPlace/CSM

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/plugins/novasplace/csm/cross-session-memory/github.svg)](https://agentmods.dev/plugins/novasplace/csm/cross-session-memory)

Your own site

<a href="https://agentmods.dev/plugins/novasplace/csm/cross-session-memory"><img src="https://agentmods.dev/badge/plugins/novasplace/csm/cross-session-memory/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/plugins/novasplace/csm/cross-session-memory"><img src="https://agentmods.dev/badge/plugins/novasplace/csm/cross-session-memory.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session not measured What this adds to a session before it is invoked.

When invoked not measured The manifest loads nothing itself; its 2 skills, 12 commands, 3 agents cost 323 tokens a session between them.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Security

Grade A, and why

cross-session-memory scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugins/cross-session-memory/.claude-plugin/plugin.json · 47 lines

What it actually says

{
  "name": "cross-session-memory",
  "version": "1.0.0",
  "description": "The complete self-hosted Cross-Session Memory runtime and lifecycle automation, native to Claude Code.",
  "author": {
    "name": "Donovan"
  },
  "homepage": "https://github.com/NovasPlace/CSM",
  "repository": "https://github.com/NovasPlace/CSM",
  "license": "MIT",
  "keywords": [
    "memory",
    "claude-code",
    "continuity",
    "postgres",
    "sqlite"
  ],
  "commands": "./commands/",
  "agents": "./agents/",
  "skills": "./skills/",
  "hooks": "./hooks/hooks.json",
  "mcpServers": "./.mcp.json",
  "interface": {
    "displayName": "Cross-Session Memory",
    "shortDescription": "Full CSM continuity runtime for Claude Code.",
    "longDescription": "Memory, governance, living state, beliefs, self-model, AgentBook, checkpoints, context cache, goals, work ledger, onboarding, re-entry, compaction, and handoff automation — wired into Claude Code's native lifecycle hooks, slash commands, subagents, and skills.",
    "developerName": "Donovan",
    "category": "Productivity",
    "capabilities": [
      "Search",
      "Write",
      "Long-term memory",
      "Lifecycle automation",
      "Living state",
      "AgentBook"
    ],
    "defaultPrompt": [
      "Search project memory before we start changing code.",
      "Build a context brief for this task from prior sessions.",
      "Show the current context pressure before we continue."
    ],
    "brandColor": "#2563EB",
    "websiteURL": "https://github.com/NovasPlace/CSM",
    "privacyPolicyURL": "https://github.com/NovasPlace/CSM/blob/master/docs/DATA_PRIVACY_AND_LIFECYCLE.md"
  }
}

Contents

What it installs

The manifest is a name and a version. 2 skills, 12 commands, 3 agents travel with it, and installing the plugin installs all of them — 323 tokens a session between them. Each is measured on its own page, and each can be installed alone.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

1mo ago First seen · 47 lines scan A fd2bfccdf445

Subscribe to this mod's changes

cross-session-memory is a plugin published in the GitHub repository NovasPlace/CSM (45 stars, last pushed 3d ago), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Memory and context ai-agents coding-assistant cross-session-memory opencode-plugin persistent memory postgresql

cross-session-memory

Getting it into your agent

Wrote this? Show the measurements

Grade A, and why

Nothing flagged

What it actually says

What it installs

What this file has done since we first saw it

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