ai-kit: Instructions file for Codex

AGENTS.md

ai-kit AGENTS.md is an instructions file for Codex, OpenCode from ivklgn/ai-kit. It costs 265 tokens per session, scanned A, original, MIT.

Repository instructions for ai-kit, whose architecture decisions, rules, specifications, and coding patterns are stored in Archcore documents.

In plain words
What is it for?
Use them to search and read relevant architecture documents, record new decisions, document undocumented systems, and scope features or refactors against existing rules.
Why use it?
They prevent changes that conflict with decisions already made for the project. They also require searching the project documentation before changing real behavior.

Instructions file for CodexOpenCode

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

This is ivklgn/ai-kit's own configuration. It tells Codex and OpenCode how to work on ai-kit 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 ai-kit configures →

Reuse

Borrowing it

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

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 ai-kit AGENTS.md

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

Your own site · 80×15
<a href="https://agentmods.dev/instructions/ivklgn/ai-kit/agents-md"><img src="https://agentmods.dev/badge/instructions/ivklgn/ai-kit/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 265 This file is loaded in full into every session.
When invoked 265 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 $0.00265 $0.00265
Opus 5.5 $0.00106 $0.00106
Sonnet 5.5 $0.00053 $0.00053
Haiku 4.5 $0.00026 $0.00026

Measured 1mo ago against content hash e2adb50b916a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

ai-kit 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 · 21 lines

What it actually says

Archcore — project context for this repo

This repo's architecture, decisions, rules, specs and patterns live in .archcore/, reachable through the Archcore MCP tools. Consult them even on code you think you know — a decision or rule may already constrain it.

  • Touching this repo's real code or behavior → search first; read only what matches.
  • A decision was made ("we'll use X", "from now on Y") → record it.
  • A module / API / system has no doc — or a search comes back empty → capture it.
  • Planning a feature or refactor → scope it against what's already decided.

A .archcore/ may also mount read-only global sources — shared, org-wide context not shown in the session-start list. list_documents / search_documents surface them alongside local docs, tagged source_kind: "global". When present, treat them as defaults a local doc can override — never edit or relate to one.

The search is cheap — lean on it. Skip it only for turns this repo would have no opinion on: syntax trivia, throwaway snippets, pure mechanics.

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 First seen · 21 lines · 265 tokens per session scan A e2adb50b916a

Subscribe to this mod's changes

ai-kit AGENTS.md is an instructions file published in the GitHub repository ivklgn/ai-kit (12 stars, last pushed 1mo ago), licensed MIT. It adds 265 tokens to every session, about $0.0011 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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