packmind: Instructions file for Codex

AGENTS.md

packmind AGENTS.md is an instructions file for Codex, OpenCode from PackmindHub/packmind. It costs 1,804 tokens per session, scanned A, original, Apache-2.0.

Repository guidance for coding agents working on Packmind, an Nx monorepo: one code repository containing multiple applications and shared packages.

In plain words
What is it for?
Use it when locating application or package code, starting local services, or running the project’s tests and other Nx tasks.
Why use it?
It summarizes the technologies, directory layout, local Docker Compose environment, and Nx workflow needed to work safely in the repository.

Instructions file for CodexOpenCode

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

This is PackmindHub/packmind's own configuration. It tells Codex and OpenCode how to work on packmind 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 packmind configures →

Reuse

Borrowing it

Nothing to install: this file belongs to PackmindHub/packmind. 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/PackmindHub/packmind/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/PackmindHub/packmind

Made for: Codex, OpenCode.

Wrote this? Show the measurements

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Per session 1,804 This file is loaded in full into every session.
When invoked 1,804 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 $0.01804 $0.01804
Opus 5.5 $0.00722 $0.00722
Sonnet 5.5 $0.00361 $0.00361
Haiku 4.5 $0.00180 $0.00180

Measured 1mo ago against content hash deacdb583a6a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

packmind 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 1mo 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 · 134 lines

How it starts

The opening of the file, as written. The whole thing — 134 lines — stays where its author put it; the contents beside it link to each section on GitHub.

_# Nx Monorepo Structure

This is an Nx monorepo containing applications and reusable packages.

Core Technologies

  • Runtime: Node.js (version specified in .nvmrc)
  • Language: TypeScript
  • Database: PostgreSQL with TypeORM for entity persistence
  • Cache: Redis for caching
  • Background Jobs: BullMQ for job queue management
  • Testing: Jest with @swc/jest as test runner. Tests are run with ./node_modules/.bin/nx run <project-name> as detailed below.

Directory Structure

  • apps/ - Deployable applications (API, frontend, CLI, e2e tests, docs)
  • packages/ - Reusable domain and infrastructure packages shared across apps
  • .github/workflows/ - CI/CD pipelines for build, test, quality checks, and deployment

Local Development Environment

Local development uses Docker Compose to run all services (API, frontend, database, Redis, etc.):

docker compose up

This starts the entire development environment. Docker Compose automatically provisions PostgreSQL and Redis - no manual setup required.

Working with Nx

The following commands apply for both NX apps and packages (use ./node_modules/.bin/nx show projects to list actual apps and packages.)

  • Test a project: ./node_modules/.bin/nx test <project-name>
  • Lint a project: ./node_modules/.bin/nx lint <project-name>
  • Build a project: ./node_modules/.bin/nx build <project-name>
  • Test affected projects: pnpm run test:staged
  • Lint affected projects: pnpm run lint:staged

Code Quality

  • Linting: ./node_modules/.bin/nx lint <project-name> runs ESLint, using the config file eslint.config.mjs.
  • Formatting: Prettier is used for code formatting. You don't have to run it, it's set as a pre-commit hook.

Commands

  • When running commands, ensure you use the correct Node version (see .nvmrc at the project's root level)
  • When renaming or moving a file that is commited to git, use git mv instead of mv
  • Ensure the env variable PACKMIND_EDITION is properly set to oss

Read the full file on GitHub · 134 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. 1mo ago Changed · +1 lines · +14 tokens per session deacdb583a6a
  2. 1mo ago Changed · -9 lines · -67 tokens per session 485d3760cd9f
  3. 1mo ago Changed · +16 lines · +162 tokens per session 76b0f821939a
  4. 1mo ago First seen · 126 lines · 1,695 tokens per session scan A 9066f4643e00

Subscribe to this mod's changes

packmind AGENTS.md is an instructions file published in the GitHub repository PackmindHub/packmind (319 stars, last pushed 4d ago), licensed Apache-2.0. It adds 1,804 tokens to every session, about $0.0072 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.

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