agentmods.dev

pop AGENTS.md

A development guide for Pop, a Go command-line email client that can send mail through Resend or SMTP. It also describes its interactive terminal interface and non-interactive command-line mode.

In plain words
What is it for?
Use it when changing email delivery, command-line behavior, the terminal interface, or project tooling, and before checking code with the required Go quality commands.
Why use it?
It gives agents the project’s build, test, formatting, and linting commands and explains where the main parts of the code are. This reduces the chance of using the wrong tool or editing the wrong file.

Instructions file for CodexOpenCode

2.9k +2 yesterday A scan 1,462 tokens original MIT
View the source file charmbracelet/pop
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.

agentmods
npx agentmods add instructions/charmbracelet/pop/agents-md
Clone the repo
git clone --depth 1 https://github.com/charmbracelet/pop

Made for: Codex, OpenCode.

Per session 1,462 This file is loaded in full into every session.
When invoked 1,462 The same file — it is already loaded in full.
Security scan A 0 findings. Scan, not verified.
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 $0.01462 $0.01462
Opus 5 $0.00731 $0.00731
Sonnet 5 $0.00292 $0.00292
Haiku 4.5 $0.00146 $0.00146

Measured 3d ago against content hash 1d5e2fc3b190, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

pop 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 3d 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.

AGENTS.md · 147 lines

How it starts

The opening of the file, as written. The whole thing — 147 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

Guide for AI agents working on the Pop codebase.

What is Pop?

Pop is a command-line email client built in Go. It supports two delivery methods — Resend (OAuth or API key) and SMTP — and provides both an interactive TUI (Bubble Tea) and non-interactive CLI sending.

Build & Development Commands

task build       # Build the project
task lint        # Run golangci-lint (strict config in .golangci.yml)
task lint:fix    # Auto-fix lint issues
task vet         # Run go vet
task test        # Run tests
task fmt         # Format code (gofumpt + goimports)
task tidy        # Tidy go modules
task             # Run the project (go run . {{.CLI_ARGS}})

Always run task lint before committing. The linter enables gofumpt and goimports formatters, wrapcheck (errors from external packages must be wrapped with fmt.Errorf("...: %w", err)), goconst (repeated string literals should be constants), gosec, revive, and others.

Architecture

Source Layout

All source files are in the package root (no sub-packages):

  • main.go — Root cobra command, flag definitions, delivery method detection, non-interactive send path
  • model.go — Bubble Tea TUI model (Model), state machine, view rendering
  • keymap.go — TUI key bindings and help
  • email.go — Email sending logic (SMTP via go-simple-mail, Resend via resend-go), Markdown-to-HTML conversion (goldmark)
  • attachments.go — Attachment list item type and delegate for the TUI
  • auth.go — OAuth 2.0 with PKCE: token storage, client registration, token exchange, refresh, callback server
  • auth_cli.go — Non-interactive OAuth flow (stdin not a terminal)
  • auth_ui.go — Interactive OAuth flow (Bubble Tea TUI with spinner states)
  • style.go — Lipgloss styles and charmtone color palette
  • skill.go — pop skill command (prints skill definition)
  • skill.md — Embedded skill body (via go:embed)
  • install_skill.go — pop install-skill command with per-agent subcommands

CLI vs TUI

Read the full file on GitHub · 147 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. 3d ago First seen · 147 lines · 1,462 tokens per session scan A 1d5e2fc3b190

Subscribe to this mod's changes

pop AGENTS.md is an instructions file published in the GitHub repository charmbracelet/pop (2,905 stars, last pushed yesterday), licensed MIT. It adds 1,462 tokens to every session, about $0.0073 per session on Opus 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.

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