What is retavyn CLAUDE.md?

Repository instructions for Claude Code, including project details and a memory system that stores information between sessions.

Use them to guide project setup, recall saved decisions, and keep the local memory cache updated.

They help the coding agent understand how the project runs and avoid repeating remote memory lookups when a local copy is available.

How mbucknam/retavyn configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to mbucknam/retavyn. 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/mbucknam/retavyn/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/mbucknam/retavyn

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/mbucknam/retavyn/claude-md/github.svg)](https://agentmods.dev/instructions/mbucknam/retavyn/claude-md)

Your own site

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

Per session 1,350 This file is loaded in full into every session.

When invoked 1,350 The same file — it is already loaded in full.

Security scan B 1 finding. 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	$0.01350	$0.01350
Opus 5.5	$0.00540	$0.00540
Sonnet 5.5	$0.00270	$0.00270
Haiku 4.5	$0.00135	$0.00135

Measured 2mo ago against content hash f17166423566, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade B, and why

retavyn CLAUDE.md scanned grade B with 1 finding 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.

Reads agent configuration directoriesmediumAgent snooping

.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.

## Hooks (in ~/.claude/settings.json)

CLAUDE.md · 111 lines

How it starts

The opening of the file, as written. The whole thing — 111 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Memory Recall — Cache-First Pattern

A local cache of all memories lives at ~/.claude/retavyn-cache.md. Before calling mcp__retavyn__recall over HTTP, always check the cache first:

Read ~/.claude/retavyn-cache.md and search for relevant content
If found locally, use it — skip the HTTP call
If not found (or the cache is missing), call mcp__retavyn__recall
After getting results from HTTP, append any new memories to ~/.claude/retavyn-cache.md so future lookups find them locally

The PostToolUse hook refreshes the full cache after every remember call. To manually refresh:

./retavyn-cache.sh

To set up a daily cron refresh (optional):

0 6 * * * /path/to/retavyn/retavyn-cache.sh

Project Overview

Personal MCP memory server that gives Claude persistent memory across sessions using a PostgreSQL backend. Supports two transports:

stdio — used by Claude Code via .mcp.json
streamable-http — used by claude.ai at https://mcp.retavyn.com/mcp

Both transports share the same main.py entrypoint; transport is selected via MEMORY_TRANSPORT env var.

Stack

Python + FastMCP SDK + Starlette (HTTP mode only)
PostgreSQL 18 on GCE VM (host configured via MEMORY_DB_HOST env var), accessed remotely
Full-text search: tsvector/tsquery + GIN index
Semantic search: pgvector (text-embedding-3-small, 1024 dims) via OpenAI or Cohere
Cloudflare tunnel for mcp.retavyn.com

Running

./setup.sh                          # first-time setup (venv + DB schema)
python main.py                      # stdio mode (default)
MEMORY_TRANSPORT=sse python main.py # HTTP mode on port 8765

CLI Commands

All CLI commands auto-load .env for DB and API credentials:

python main.py dump                        # export all memories to ~/.claude/retavyn-cache.md
python main.py ingest <path> [category]    # ingest local files into DB with auto-backfill
python main.py health                      # show category stats, missing embeddings, orphans, duplicates
python main.py session-wrap                # summarize transcript from stdin JSON, store as journal
python main.py proactive-recall [cwd]      # surface memories relevant to current git context
python main.py generate-token              # generate a new rtv_* access token

Read the full file on GitHub · 111 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 · 111 lines · 1,350 tokens per session scan B f17166423566

Subscribe to this mod's changes

retavyn CLAUDE.md is an instructions file published in the GitHub repository mbucknam/retavyn (0 stars, last pushed 1mo ago), licensed MIT. It adds 1,350 tokens to every session, about $0.0054 per session on Opus 5.5. A static security scan graded it B with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Memory and context

retavyn CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
retavyn CLAUDE.mdmbucknam/retavyn	Instructions file	0	1mo ago	MIT	B	1,350	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

retavyn: Instructions file for Claude Code