better-email-mcp: Instructions file for Codex

AGENTS.md

better-email-mcp AGENTS.md is an instructions file for Codex, OpenCode from n24q02m/better-email-mcp. It costs 1,268 tokens per session, scanned A, a copy of better-notion-mcp AGENTS.md, Apache-2.0.

Project instructions for a TypeScript server that connects to email through IMAP, which receives mail, and SMTP, which sends it, using Node.js and Bun.

In plain words
What is it for?
Use them when installing dependencies, running the development server, checking types and style, building the project, or running one email-server test.
Why use it?
They collect the exact setup, build, checking, formatting, and testing commands needed to work on the server consistently.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: mentions AGENTS.md.

This is n24q02m/better-email-mcp's own configuration. It tells Codex and OpenCode how to work on better-email-mcp itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything better-email-mcp configures →

Needs its repository: it reads a path above its own folder, which exists only inside the repository. The line is import type { AccountConfig } from '../helpers/config.js'.

Reuse

Borrowing it

Nothing to install: this file belongs to n24q02m/better-email-mcp. 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/n24q02m/better-email-mcp/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/n24q02m/better-email-mcp

Made for: Codex, OpenCode.

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.

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README.md
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Your own site
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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.

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Your own site · 80×15
<a href="https://agentmods.dev/instructions/n24q02m/better-email-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/n24q02m/better-email-mcp/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 1,268 This file is loaded in full into every session.
When invoked 1,268 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 86% copy Near-identical to another mod 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 $0.01268 $0.01268
Opus 5 $0.00634 $0.00634
Sonnet 5 $0.00254 $0.00254
Haiku 4.5 $0.00127 $0.00127

Measured 9d ago against content hash 7e6d9ed42781, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

better-email-mcp AGENTS.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 9d 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.

Origin

This is a copy

86% identical to better-notion-mcp AGENTS.md — 73 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

AGENTS.md · 142 lines

How it starts

The opening of the file, as written. The whole thing — 142 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md - better-email-mcp

MCP Server for Email (IMAP/SMTP). TypeScript, Node.js >= 24, bun, ESM.

Build / Lint / Test Commands

bun install                 # Install dependencies
bun run build               # tsc --build && esbuild CLI bundle
bun run check               # Biome check + tsc --noEmit (CI command)
bun run check:fix           # Auto-fix Biome + type check
bun run test                # vitest --passWithNoTests
bun run test:watch          # vitest watch
bun run test:coverage       # vitest --coverage
bun run lint                # biome check .
bun run format              # biome format --write .
bun run type-check          # tsc --noEmit
bun run dev                 # tsx watch dev server

# Run a single test file
bun vitest run src/tools/helpers/errors.test.ts

# Run a single test by name
bun vitest run -t "test name pattern"

# Mise shortcuts
mise run setup              # Full dev environment setup
mise run lint               # bun run check
mise run test               # bun run test
mise run fix                # bun run check:fix

Environment Variables

# Required: email credentials (App Passwords, NOT regular passwords)
[email protected]:abcd-efgh-ijkl-mnop

# Multiple accounts
[email protected]:pass1,[email protected]:pass2

# Custom IMAP host (optional :port, default 993)
[email protected]:password:imap.custom.com:1993

# Local IMAP proxy ("localhost" is accepted as a host)
[email protected]:password:localhost:1993

Code Style

Formatting (Biome)

  • Indent: 2 spaces
  • Line width: 120
  • Quotes: Single quotes
  • Semicolons: As needed (omit when possible)
  • Trailing commas: None
  • Arrow parens: Always
  • Bracket spacing: true
  • Line endings: LF

Imports

  1. Type imports use import type (separate statement)
  2. External packages first, then internal imports (relative paths)
  3. Node builtins with node: prefix (node:fs, node:path, node:url)
  4. Always use .js extension in import paths (ESM requirement)

Read the full file on GitHub · 142 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. 9d ago First seen · 142 lines · 1,268 tokens per session scan A 7e6d9ed42781

Subscribe to this mod's changes

better-email-mcp AGENTS.md is an instructions file published in the GitHub repository n24q02m/better-email-mcp (34 stars, last pushed today), licensed Apache-2.0. It adds 1,268 tokens to every session, about $0.0063 per session on Opus 5. A static security scan graded it A with 0 findings. It is 86% identical to better-notion-mcp AGENTS.md, differing in 73 lines, and is treated as a copy.

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