relay

relay is a cursor rule for Cursor from prakrititz/relayBrain. It costs 770 tokens per session, scanned A, original, MIT.

Relay coordination rules for sharing project context between coding agents, managing locks, and handling Relay chat commands. Relay is a tool for shared agent memory and handoffs.

In plain words
What is it for?
Loading room context, checking shared memory, coordinating concurrent work, syncing Relay files, and processing commands such as /relay ask.
Why use it?
They explain what agents must read and update so multiple sessions can coordinate without losing important project information.

Cursor rule for Cursor

Written for Cursor: installed under .cursor/. Also seen: mentions Claude Code; mentions Codex.

Good fit Loading room context, checking shared memory, coordinating concurrent work, syncing Relay files, and processing commands such as /relay ask.

Compare 6 cursor rules from other repositories ↓
Install with agentmods
npx agentmods add rules/prakrititz/relaybrain/relay
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/prakrititz/relayBrain

Made for: Cursor.

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.

agentmods badge for relay

README.md
[![agentmods](https://agentmods.dev/badge/rules/prakrititz/relaybrain/relay/github.svg)](https://agentmods.dev/rules/prakrititz/relaybrain/relay)
Your own site
<a href="https://agentmods.dev/rules/prakrititz/relaybrain/relay"><img src="https://agentmods.dev/badge/rules/prakrititz/relaybrain/relay/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.

agentmods 80×15 button for relay

Your own site · 80×15
<a href="https://agentmods.dev/rules/prakrititz/relaybrain/relay"><img src="https://agentmods.dev/badge/rules/prakrititz/relaybrain/relay.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 770 This file is loaded in full into every session.
When invoked 770 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00770 $0.00770
Opus 5.5 $0.00308 $0.00308
Sonnet 5.5 $0.00154 $0.00154
Haiku 4.5 $0.00077 $0.00077

Measured yesterday against content hash dee6000c0c70, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

relay 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 yesterday.

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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

.cursor/rules/relay.mdc · 48 lines

How it starts

The opening of the file, as written. The whole thing — 48 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Relay (auto-installed)

This project uses Relay for cross-agent memory. Do not ask the user to configure agent files manually.

Every session — read first: .relay/AGENT_BOOTSTRAP.md

Phase Action
Session start Read .relay/relay_context.md (handoff). Never paste raw transcripts.
After agent work You update .relay/*.md from compile_brief.md (stop hook triggers this)
Background sync relay watch . keeps memory.json + compile_brief.md fresh
Not installed? Run relay add . or relay init in project root

Stop hooks: Cursor, Claude Code, Codex, Copilot CLI, Antigravity — installed by relay add / relay init. Relay MCP: relay_room_brief, locks, chat history — installed into each agent's MCP config by relay add.

Shared memory graph (Relay MCP)

  • Before editing files you have not touched in this session, call relay_session_brief with their paths. It tells you who is editing them right now and why, past collisions, decisions, and the prompts behind recent changes from every agent and teammate. Respect what it says.
  • When you make an architectural or design decision, call relay_report_decision with decision and the files it affects.
  • When a claim is denied, the reason says what the holder is working on. Pick other work, or ask the user.
  • To explain why code looks the way it does, call relay_graph_query with query: "file_story" and the path.

Relay pseudo-commands (user chat)

These are not built-in slash commands. They are a project convention — phrases the user types so agents recognize Relay intent.

When the user sends any of these phrases (with or without a leading /), treat them as Relay instructions — not casual chat:

User says You do
/relay update or relay update relay sync . → relay compile . → read .relay/compile_brief.md → update .relay/project.md, current_task.md, decisions.md, failures.md → relay context . → confirm "Relay updated."
/relay context or relay context Read .relay/relay_context.md (run relay context . first if stale). Summarize handoff briefly.
/relay ask or relay ask Call Relay MCP tool relay_room_brief (MCP server relay). Required on Cursor, Claude Code, Codex, Copilot CLI, and Antigravity — not a terminal command for the human. Summarize teammate chat, code edits, locks, and file-sync notes. Tell the user before you edit shared files. If relay MCP is missing, say so and suggest relay add . + agent restart (do not ask the user to run relay ask).
/relay init or relay init Run relay init in project root if .relay/ missing; else confirm already installed.

Read the full file on GitHub · 48 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.

  1. yesterday Changed · +7 lines · +151 tokens per session dee6000c0c70
  2. 1mo ago First seen · 41 lines · 619 tokens per session scan A e9abdcfa8b71

Subscribe to this mod's changes

relay is a cursor rule published in the GitHub repository prakrititz/relayBrain (33 stars, last pushed yesterday), licensed MIT. It adds 770 tokens to every session, about $0.0031 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 2026-08-30.