build: Instructions file for Codex

AGENTS.md

build AGENTS.md is an instructions file for Codex, OpenCode from kintecus/build. It costs 1,192 tokens per session, scanned A, original, MIT.

A reusable set of workspace instructions for project and product work, including how to read the repository guidance and how to collaborate with the operator.

In plain words
What is it for?
Use it to guide coding-agent behavior, structure rough ideas into plans, maintain workspace instructions, and follow the repository layout and project-management principles.
Why use it?
It establishes shared working rules such as keeping plans proportional, challenging ideas when needed, and editing the canonical AGENTS.md file instead of its CLAUDE.md link.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: reads .claude/ paths; mentions CLAUDE.md; mentions Claude Code.

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

Needs its repository: it reads a path above its own folder, which exists only inside the repository. The line is .agents/skills # Symlink -> ../.claude/skills, for Codex and other .agents/ readers..

Reuse

Borrowing it

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

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.

agentmods badge for build AGENTS.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/kintecus/build/agents-md/github.svg)](https://agentmods.dev/instructions/kintecus/build/agents-md)
Your own site
<a href="https://agentmods.dev/instructions/kintecus/build/agents-md"><img src="https://agentmods.dev/badge/instructions/kintecus/build/agents-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.

agentmods 80×15 button for build AGENTS.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/kintecus/build/agents-md"><img src="https://agentmods.dev/badge/instructions/kintecus/build/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 1,192 This file is loaded in full into every session.
When invoked 1,192 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 $0.01192 $0.01192
Opus 5.5 $0.00477 $0.00477
Sonnet 5.5 $0.00238 $0.00238
Haiku 4.5 $0.00119 $0.00119

Measured 2mo ago against content hash b6e81c3e8802, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

build 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 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.

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 · 94 lines

How it starts

The opening of the file, as written. The whole thing — 94 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Build - Workspace instructions

This file is loaded by your coding agent when you launch it from the workspace root. It tells the agent who you are, how you work, and how the workspace is laid out.

AGENTS.md is the canonical file - it's the open instruction-file convention read by Codex, opencode, Cursor, and ~20 other tools. CLAUDE.md is a symlink to this file, so Claude Code picks up the same content. Edit AGENTS.md; never edit CLAUDE.md directly.

Treat this as a template. Replace the placeholder blocks with your own content. Anything between <!-- --> is guidance, not output.

About the operator

How to work with me

  • Be a thinking partner, not a yes-man. Challenge my ideas before refining them.
  • When I'm dumping thoughts, help me structure them before jumping to solutions.
  • Default to concise. Go deep only when I ask.
  • Push back when warranted. I'm not always right.
  • No filler, no excessive enthusiasm. Friendly but professional.
  • Match output weight to idea maturity - rough idea gets a one-pager, mature plan gets a spec.

Core PM principles

  • Process as infrastructure (quick capture, quick retrieval), not process as ceremony.
  • Prefer short, visual specs over long prose documents.
  • If something is repeatable, automate or template it.

Workspace layout

This workspace is multi-project. Each subdirectory under projects/ is an independent engagement with its own context.

Read the full file on GitHub · 94 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. 2mo ago First seen · 94 lines · 1,192 tokens per session scan A b6e81c3e8802

Subscribe to this mod's changes

build AGENTS.md is an instructions file published in the GitHub repository kintecus/build (2 stars, last pushed 3mo ago), licensed MIT. It adds 1,192 tokens to every session, about $0.0048 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 2026-08-31.

Related

build AGENTS.md compared with instructions from other repositories

build AGENTS.md next to 6 instructions from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
build AGENTS.mdkintecus/buildInstructions file23mo agoMITA1,192Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscodeInstructions file195kyesterdayMITA9,719GitHub Copilot
next.js AGENTS.mdvercel/next.jsInstructions file143kyesterdayMITA7,461Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchainInstructions file149kyesterdayMITA4,680Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscodeInstructions file195kyesterdayMITA5,516GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscodeInstructions file195kyesterdayMITA3,093GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harnessInstructions file274k2d agoMITA4,313Codex, OpenCode