.agents: Instructions file for Codex

AGENTS.md

.agents AGENTS.md is an instructions file for Codex, OpenCode from sergeyklay/.agents. It costs 890 tokens per session, scanned A, original, Apache-2.0.

Repository instructions for maintaining the .agents project and its installer. They define where shared rules belong, which host-specific differences are allowed, and which checks must run after changes.

In plain words
What is it for?
They guide changes to skills, templates, installer scripts, shell formatting, shell checks, and host-specific context installation.
Why use it?
They reduce inconsistent edits between canonical files and installed host versions, and highlight installer behaviours that can leave stale or misplaced rules.

Instructions file for CodexOpenCode

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

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

Reuse

Borrowing it

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

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 .agents AGENTS.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/sergeyklay/.agents/agents-md.svg)](https://agentmods.dev/instructions/sergeyklay/.agents/agents-md)
Your own site
<a href="https://agentmods.dev/instructions/sergeyklay/.agents/agents-md"><img src="https://agentmods.dev/badge/instructions/sergeyklay/.agents/agents-md.svg" alt="Measured on agentmods" height="20"></a>
Per session 890 This file is loaded in full into every session.
When invoked 890 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 $0.00890 $0.00890
Opus 5 $0.00445 $0.00445
Sonnet 5 $0.00178 $0.00178
Haiku 4.5 $0.00089 $0.00089

Measured today against content hash 5e9a86f306dc, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

.agents 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 today.

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 · 68 lines

How it starts

The opening of the file, as written. The whole thing — 68 lines — stays where its author put it; the contents beside it link to each section on GitHub.

.agents

.agents/ is the canonical source. templates/ may contain only host-specific differences; do not duplicate canonical content there.

Commands

  • Before finishing any change: make check (runs every CI gate from ci.yml locally)
  • After changing scripts/install.sh or installer behavior: bats test/
  • Before finishing a shell-script change: shfmt -d scripts
  • Before finishing an installer change: shellcheck scripts/install.sh

Run asdf install shfmt or asdf install bats when a tool is unavailable.

Gotchas

  • The installer skips a host whose root directory does not exist; inspect its output.
  • --rules does not remove stale destination files. Legacy Working Agreement cleanup happens only after a successful --context installation.
  • A Claude paths overlay marks a rule that must not become an OpenCode global instruction.
  • --context overwrites the host-native context file and removes only legacy rules that match the canonical content.
  • lint, typecheck and the other file-selecting gates read git ls-files; an untracked file is skipped silently and the gate can still exit 0. Stage it first.
  • Everything tracked under .agents/skills/ ships to five host directories; keep tests and fixtures in test/, which ships nowhere.

Boundaries

These constraints protect canonical source files and installed host views.

Always

  • Keep behavior shared by hosts in .agents/; add host-specific frontmatter or prompt fragments only in templates/.
  • Run make validate after changing a skill.
  • Follow the surrounding style. Do not refactor adjacent legacy content without a separate task.

Ask first

  • Changes to host-wide settings in .claude/, .gemini/, or .opencode/.
  • Installer destinations or stale-file migration behavior.
  • Canonical skill content, its validators, or vendor templates.

Never

  • Edit installed files under $HOME as a substitute for updating this source repository.
  • Copy a path-scoped Claude rule into OpenCode's global rules.

Read the full file on GitHub · 68 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. today Changed · +27 lines · +523 tokens per session 5e9a86f306dc
  2. 2d ago Changed · -1 tokens per session 3ccc559a8185
  3. 3d ago Changed · +1 lines · +21 tokens per session 88f5b3c930fe
  4. 4d ago First seen · 40 lines · 347 tokens per session scan A a4a504f417a2

Subscribe to this mod's changes

.agents AGENTS.md is an instructions file published in the GitHub repository sergeyklay/.agents (5 stars, last pushed today), licensed Apache-2.0. It adds 890 tokens to every session, about $0.0044 per session on Opus 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 2026-09-03.

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