What is memroach CLAUDE.md?

A set of instructions for Claude Code when working on MemRoach, a system that stores and synchronizes AI-agent memories using CockroachDB, a distributed database.

Use it when developing or maintaining MemRoach’s Python scripts, memory search, file synchronization, background syncing, or database schema.

It gives the coding agent the repository’s structure, database layout, configuration details, and coding patterns so it can make changes with the right context.

How biplav-crl/memroach configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to biplav-crl/memroach. 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/biplav-crl/memroach/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/biplav-crl/memroach

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/biplav-crl/memroach/claude-md/github.svg)](https://agentmods.dev/instructions/biplav-crl/memroach/claude-md)

Your own site

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

Per session 863 This file is loaded in full into every session.

When invoked 863 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	$0.00863	$0.00863
Opus 5.5	$0.00345	$0.00345
Sonnet 5.5	$0.00173	$0.00173
Haiku 4.5	$0.00086	$0.00086

Measured 2mo ago against content hash d3aaacf3eda5, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

memroach 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 · 80 lines

How it starts

The opening of the file, as written. The whole thing — 80 lines — stays where its author put it; the contents beside it link to each section on GitHub.

MemRoach — Instructions for Claude Code

What is this repo?

MemRoach is a CockroachDB-backed memory sync system for AI agents. It has three main components:

memroach_mcp_server.py — MCP server (primary interface, 16 tools)
memroach_sync.py — File sync client + CLI + hook handler. Syncs ~/.claude/ to/from CockroachDB.
memroach_daemon.py — Background sync daemon for real-time cross-machine updates.

Key patterns

Single-file Python scripts using FastMCP and pg8000
Direct CockroachDB connection (no Cloud Function intermediary)
Content-addressable blob storage with gzip compression
Hybrid search: vector embeddings (OpenAI text-embedding-3-small) + keyword matching
Per-memory visibility: private (default) or team
Optimistic concurrency via version column
Knowledge graph with typed links (relates_to, duplicates, supersedes, caused_by, refines)
Memory decay via access tracking

Database

All tables prefixed with memroach_. Schema in schema/memroach_schema.sql.

memroach_blobs — deduplicated content store
memroach_files — file metadata per user+machine
memroach_embeddings — vector embeddings for search
memroach_history — version changelog
memroach_links — knowledge graph edges
memroach_access — read tracking for decay scoring
memroach_log — audit trail

Config

memroach_config.json (gitignored) — DB credentials, embedding API key, sync preferences.

How Claude Should Use MemRoach

Memory saving: files first, MCP for extras

Default behavior — no change needed. Continue saving memories to ~/.claude/memory/ files as normal. The sync hooks automatically push these to CockroachDB on Stop/SessionEnd. This is the primary path.

Use MCP tools when you need something files can't do:

memroach_store — Write a memory directly to DB (useful from non-Claude-Code clients like Cursor)
memroach_share(path, "team") — Make a memory visible to teammates
memroach_link(from, to, type) — Create knowledge graph connections between related memories
memroach_merge(paths, content) — Consolidate duplicate memories into one

Read the full file on GitHub · 80 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 · 80 lines · 863 tokens per session scan A d3aaacf3eda5

Subscribe to this mod's changes

memroach CLAUDE.md is an instructions file published in the GitHub repository biplav-crl/memroach (1 stars, last pushed 7mo ago), licensed MIT. It adds 863 tokens to every session, about $0.0035 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.

Databases Memory and context

memroach CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
memroach CLAUDE.mdbiplav-crl/memroach	Instructions file	1	7mo ago	MIT	A	863	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

memroach: Instructions file for Claude Code