deltallm: Instructions file for Codex

AGENTS.md

deltallm AGENTS.md is an instructions file for Codex, OpenCode from deltawi/deltallm. It costs 282 tokens per session, scanned A, original, MIT.

A short repository instruction file for Deltallm that points agents to RULES.md, the project’s complete engineering guide.

In plain words
What is it for?
It helps agents find the required starting point, follow instruction precedence, and keep repository guidance maintained correctly.
Why use it?
It ensures agents read the authoritative rules before analyzing, editing, or reviewing code, while avoiding duplicated instructions that could become outdated.

Instructions file for CodexOpenCode

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

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

Reuse

Borrowing it

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

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 deltallm AGENTS.md

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

Your own site · 80×15
<a href="https://agentmods.dev/instructions/deltawi/deltallm/agents-md"><img src="https://agentmods.dev/badge/instructions/deltawi/deltallm/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 282 This file is loaded in full into every session.
When invoked 282 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 $0.00282 $0.00282
Opus 5.5 $0.00113 $0.00113
Sonnet 5.5 $0.00056 $0.00056
Haiku 4.5 $0.00028 $0.00028

Measured 1mo ago against content hash 8820f92af648, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

deltallm 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

Repository Instructions

Required first step

Before analyzing, planning, editing, running project commands, or reviewing changes, read RULES.md completely. It is the canonical repository-wide engineering contract and applies to every task in this repository.

RULES.md is larger than some agents' automatically loaded instruction limit. Open the file directly and continue reading in chunks until the end; do not rely on a truncated view, excerpt, or prior summary.

If RULES.md is missing or cannot be read completely, stop and report the problem before changing the repository.

Documentation language

You MUST use ASD-STE100 Simplified Technical English for all documentation and written project communication you produce or update. This includes pull requests, explanations, and MkDocs pages. Follow the documentation language rule.

Precedence and maintenance

  • Follow system and user instructions first, then the applicable repository guidance.
  • More local AGENTS.md or AGENTS.override.md files may add context or tighten requirements for their subtree, but must not weaken or contradict RULES.md.
  • Keep this file as a small discovery/bootstrap pointer. Do not duplicate the engineering rules here.
  • Do not edit AGENTS.md or RULES.md merely to make another change easier. Governance changes require explicit scope, rationale, and review.
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 · +3 lines · +26 tokens per session 8820f92af648
  2. 1mo ago Changed · +1 lines · +27 tokens per session f7b58b9cc978
  3. 2mo ago First seen · 17 lines · 229 tokens per session scan A 4da0256d1f0f

Subscribe to this mod's changes

deltallm AGENTS.md is an instructions file published in the GitHub repository deltawi/deltallm (20 stars, last pushed yesterday), licensed MIT. It adds 282 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.

Related

deltallm AGENTS.md compared with instructions from other repositories

deltallm AGENTS.md next to 6 instructions from other repositories
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deltallm AGENTS.mddeltawi/deltallmInstructions file20yesterdayMITA282Codex, OpenCode
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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