adr-kit: Instructions file for Codex

AGENTS.md

adr-kit AGENTS.md is an instructions file for Codex, OpenCode from rvdbreemen/adr-kit. It costs 327 tokens per session, scanned A, original, MIT.

Agent instructions for adr-kit covering task tracking, repository conventions, verification, and architecture decision records.

In plain words
What is it for?
Use them when finding or creating tasks, changing code or docs, running verification, updating task status, or working on architecture decisions.
Why use it?
They prevent work from bypassing the project backlog or its required checks and documentation.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: mentions CLAUDE.md; mentions Codex; $skill-name invocation.

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

Reuse

Borrowing it

Nothing to install: this file belongs to rvdbreemen/adr-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/rvdbreemen/adr-kit/dev/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/rvdbreemen/adr-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 adr-kit AGENTS.md

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

Your own site · 80×15
<a href="https://agentmods.dev/instructions/rvdbreemen/adr-kit/agents-md"><img src="https://agentmods.dev/badge/instructions/rvdbreemen/adr-kit/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 327 This file is loaded in full into every session.
When invoked 327 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 $0.00327 $0.00327
Opus 5.5 $0.00131 $0.00131
Sonnet 5.5 $0.00065 $0.00065
Haiku 4.5 $0.00033 $0.00033

Measured 1mo ago against content hash 81efc0f54e52, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

adr-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 · 37 lines

What it actually says

adr-kit Agent Instructions

These instructions adapt the repository guidance for Codex and other coding agents working in adr-kit.

Task management

  • Treat Backlog.md as the source of truth for meaningful work.
  • Search for an existing task before starting implementation work.
  • If no task exists, create one before editing code or docs.
  • Prefer the Backlog MCP tools for reading, searching, creating, and updating tasks. Use the backlog CLI only when MCP is unavailable or insufficient.
  • Do not edit files in backlog/tasks/ directly.
  • Keep tasks small enough to finish in one focused pass.

Repo conventions

  • Keep changes small, focused, and dependency-free unless the roadmap says otherwise.
  • Follow the existing adr-kit conventions in README.md, ROADMAP.md, and CLAUDE.md.
  • Favor deterministic, stdlib-first changes over new runtime dependencies.

Verification

  • Run the smallest test or check that proves the change.
  • Broaden verification when the change touches shared behavior, tooling, package layout, or user-facing workflow.
  • Before marking work done, make sure the task status and notes in Backlog are updated to match the actual change.

ADR Kit

Read .adr-kit/ADR-guide.md before architectural changes. Architecture decisions live in docs/adr/. Use $adr-kit:context before implementation, $adr-kit:adr for new decisions, and $adr-kit:judge before commit.

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 · 37 lines · 327 tokens per session scan A 81efc0f54e52

Subscribe to this mod's changes

adr-kit AGENTS.md is an instructions file published in the GitHub repository rvdbreemen/adr-kit (13 stars, last pushed yesterday), licensed MIT. It adds 327 tokens to every session, about $0.0013 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.

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