What is ardur-agent AGENTS.md?

A session guide for Ardur Agent, including a required read-only startup check and rules for finding and claiming work.

Use it before planning, editing, testing, or handing off work in the ardur-agent project.

It prevents agents from working on the wrong task or interfering with parallel sessions by defining which project records and files are authoritative.

How ArdurAI/ardur-agent configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to ArdurAI/ardur-agent. 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/ArdurAI/ardur-agent/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/ArdurAI/ardur-agent

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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/ardurai/ardur-agent/agents-md/github.svg)](https://agentmods.dev/instructions/ardurai/ardur-agent/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/ardurai/ardur-agent/agents-md"><img src="https://agentmods.dev/badge/instructions/ardurai/ardur-agent/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/ardurai/ardur-agent/agents-md"><img src="https://agentmods.dev/badge/instructions/ardurai/ardur-agent/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 1,263 This file is loaded in full into every session.

When invoked 1,263 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.

Model	Per session	Once invoked
Fable 5.1	$0.01263	$0.01263
Opus 5.5	$0.00505	$0.00505
Sonnet 5.5	$0.00253	$0.00253
Haiku 4.5	$0.00126	$0.00126

Measured 1mo ago against content hash e078f7c0b10d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

ardur-agent 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 · 146 lines

How it starts

The opening of the file, as written. The whole thing — 146 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Ardur Agent Session Instructions

These instructions apply to every LLM, coding agent, and human-assisted agent session that works in this repository.

Mandatory Bootstrap

Before planning, editing, testing, or creating a handoff, run:

python3 scripts/agent_bootstrap.py

Use --json only when a tool needs machine-readable output:

python3 scripts/agent_bootstrap.py --json

The bootstrap is read-only. It reports current Linear status, project progress, Git/worktree state, provider and memory posture, unowned parallel:ready candidates, the Plan Corpus verification backlog, and the required non- interference rules for parallel sessions.

If the generic Linear connector shows a workspace or team other than ardur-agent / ARD, do not claim that work. The private architect/tools/linear_graphql.py helper is preferred when present, but the public bootstrap must degrade cleanly: it may use LINEAR_ARDUR_AGENT_KEY / LINEAR_API_KEY or the matching Keychain item to query ARD directly, and when no ARD credential is available it reports GitHub/public contribution fallback steps instead of blocking checkout-level bootstrap.

Source Hierarchy

Linear ARD is the internal source of truth for work scope, active state, priority, acceptance criteria, progress, blockers, and verification evidence.
EXTENDED drive is the primary file/evidence source for plans, journals, audits, local branches, and implementation evidence.
GitHub ArdurAI/ardur-agent is the verified public code surface for PRs, CI, releases, and public collaboration.
Notion is a knowledge projection, useful for durable explanation and navigation, but it is not the authority for whether work is complete.

Session Ownership Rule

Before code edits, a session must claim one unowned parallel:ready Linear issue. After claiming it, update Linear to parallel:owned or In Progress and record:

one Linear issue,
one branch or isolated worktree,
one EXTENDED-drive session journal,
one explicit file/module scope.

Read the full file on GitHub · 146 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.

1mo ago Changed · +3 lines · +53 tokens per session e078f7c0b10d
2mo ago First seen · 143 lines · 1,210 tokens per session scan A ee1cddc86322

Subscribe to this mod's changes

ardur-agent AGENTS.md is an instructions file published in the GitHub repository ArdurAI/ardur-agent (2 stars, last pushed 2d ago), licensed Apache-2.0. It adds 1,263 tokens to every session, about $0.0051 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.

Building agents Multi-Agent acp ai-agent mcp oss receipt-chain

ardur-agent AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
ardur-agent AGENTS.mdArdurAI/ardur-agent	Instructions file	2	2d ago	Apache-2.0	A	1,263	Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	9,719	GitHub Copilot
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	5,516	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	today	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	today	MIT	A	4,680	Codex, OpenCode
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	3,093	GitHub Copilot
vscode model-prompts.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	2,022	GitHub Copilot

ardur-agent: Instructions file for Codex