What is memsync CLAUDE.md?

Project instructions for memsync, a command-line tool that keeps Claude Code’s shared memory file synchronized across computers using existing cloud drives.

Use them as a starting guide when building or modifying memsync.

They give the agent the project structure, design decisions, existing code, and known risks it needs before changing the code.

How EdgeCaser/memsync configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to EdgeCaser/memsync. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/EdgeCaser/memsync/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/EdgeCaser/memsync

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/instructions/edgecaser/memsync/claude-md/github.svg)](https://agentmods.dev/instructions/edgecaser/memsync/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/edgecaser/memsync/claude-md"><img src="https://agentmods.dev/badge/instructions/edgecaser/memsync/claude-md/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/instructions/edgecaser/memsync/claude-md"><img src="https://agentmods.dev/badge/instructions/edgecaser/memsync/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 894 This file is loaded in full into every session.

When invoked 894 The same file — it is already loaded in full.

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.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00894	$0.00894
Opus 5.5	$0.00358	$0.00358
Sonnet 5.5	$0.00179	$0.00179
Haiku 4.5	$0.00089	$0.00089

Measured 2mo ago against content hash b32360408611, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

memsync CLAUDE.md 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 2mo 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.

CLAUDE.md · 93 lines

How it starts

The opening of the file, as written. The whole thing — 93 lines — stays where its author put it; the contents beside it link to each section on GitHub.

memsync — Project Context for Claude Code

You are building memsync, a cross-platform CLI tool that maintains a global identity-layer memory file for Claude Code users, synced across machines via cloud storage they already have (OneDrive, iCloud Drive, Google Drive).

This document is your entry point. Read all linked documents before writing any code.

Document map

File	What it contains
`CLAUDE.md`	This file — start here
`ARCHITECTURE.md`	Full system design, module map, data flow
`PROVIDERS.md`	Provider plugin system — BaseProvider ABC, all three implementations
`CONFIG.md`	Config file design, schema, platform paths
`COMMANDS.md`	Every CLI command — args, behavior, edge cases
`EXISTING_CODE.md`	Working prototype code — use this as the base, not a reference
`PITFALLS.md`	Known issues, trust boundaries, things that have already gone wrong
`REPO.md`	Repository structure, CI, PyPI, GitHub conventions
`STYLE.md`	Code style, naming conventions, what good looks like here

Read them in this order:

ARCHITECTURE.md — understand the shape of the system
EXISTING_CODE.md — understand what already works
PROVIDERS.md — the most important new piece
CONFIG.md — feeds into everything
PITFALLS.md — read before touching sync.py or providers
COMMANDS.md, REPO.md, STYLE.md — as needed

What this project is

memsync solves a specific problem: Claude Code has no memory between sessions. The standard fix is ~/.claude/CLAUDE.md, but it drifts, bloats, and doesn't sync across machines.

memsync maintains one canonical GLOBAL_MEMORY.md in your cloud sync folder. At session start, Claude Code reads it via a symlink (Mac/Linux) or copy (Windows) at ~/.claude/CLAUDE.md. After meaningful sessions, the user runs memsync refresh --notes "..." and the Claude API merges the notes in.

This is the identity layer — who the user is, what they're working on, standing preferences. Not project docs. Not cold storage. Not a knowledge base.

Read the full file on GitHub · 93 lines

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.

2mo ago First seen · 93 lines · 894 tokens per session scan A b32360408611

Subscribe to this mod's changes

memsync CLAUDE.md is an instructions file published in the GitHub repository EdgeCaser/memsync (2 stars, last pushed 11d ago), licensed MIT. It adds 894 tokens to every session, about $0.0036 per session on Opus 5.5. 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 2026-08-31.

Memory and context

memsync CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
memsync CLAUDE.mdEdgeCaser/memsync	Instructions file	2	11d ago	MIT	A	894	Claude Code
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	yesterday	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

memsync: Instructions file for Claude Code