What is claude-code-env AGENTS.md?

Repository instructions for a small Go command-line program, including its file layout, build and test commands, and coding conventions.

They help with building, testing, formatting, linting, benchmarking, organizing files, naming code, and following the project’s configuration and backup practices.

They give an AI assistant the project-specific rules needed to make changes that fit the repository.

How cexll/claude-code-env configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to cexll/claude-code-env. 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/cexll/claude-code-env/master/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/cexll/claude-code-env

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/cexll/claude-code-env/agents-md/github.svg)](https://agentmods.dev/instructions/cexll/claude-code-env/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/cexll/claude-code-env/agents-md"><img src="https://agentmods.dev/badge/instructions/cexll/claude-code-env/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/cexll/claude-code-env/agents-md"><img src="https://agentmods.dev/badge/instructions/cexll/claude-code-env/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 580 This file is loaded in full into every session.

When invoked 580 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	$0.00580	$0.00580
Opus 5.5	$0.00232	$0.00232
Sonnet 5.5	$0.00116	$0.00116
Haiku 4.5	$0.00058	$0.00058

Measured 2mo ago against content hash 8b7f1b380ed9, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

claude-code-env 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 2mo 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 · 42 lines

How it starts

The opening of the file, as written. The whole thing — 42 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Repository Guidelines

This guide helps contributors work effectively on the simplified-cce Go CLI.

Project Structure & Module Organization

Module: simplified-cce; CLI entry at main.go.
Core files in repo root: launcher.go, config.go, ui.go.
Tests colocated as *_test.go (e.g., main_test.go).
CI workflows and templates in .github/; lint config in .golangci.yml.
Runtime config: ~/.claude-code-env/config.json; timestamped backups in ~/.claude-code-env/backups/.

Build, Test, and Development Commands

make build: Compile the CLI to ./cce.
make test: Run all unit tests verbosely.
make test-coverage: Generate coverage.out and coverage.html.
make bench: Execute benchmarks.
make fmt / make vet: Format imports/code and run vet checks.
golangci-lint run: Full lint suite per .golangci.yml.
Example subset: go test -run TestName ./....

Coding Style & Naming Conventions

Formatting: gofmt/goimports (run make fmt before committing).
Imports: group stdlib, third‑party, then local (simplified-cce/...).
Naming: Exported CamelCase; unexported camelCase.
Keep functions small; prefer table‑driven tests; avoid naked returns in long funcs.

Testing Guidelines

Framework: Go testing package; place tests next to sources as *_test.go.
Names: TestXxx for tests; BenchmarkXxx for benchmarks.
Coverage: maintain or improve; verify with make test-coverage.
Security: run make test-security for security‑focused tests when applicable.

Commit & Pull Request Guidelines

Commits: concise prefixes (feat:, fix:, chore:, docs:, refactor:, test:, style:); explain the "why" when non‑obvious.
PRs: clear description, linked issues (e.g., Closes #123), tests for changes, and CLI output/screenshots if behavior changes.
Quality gate: ensure make quality (and linters) pass before review.

Security & Configuration Tips

Do not commit secrets. Config lives under ~/.claude-code-env/ with 0700/0600 permissions; backups are created before edits (see config.go).
For code touching I/O or crypto, run gosec via golangci-lint locally.

Read the full file on GitHub · 42 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.

2mo ago First seen · 42 lines · 580 tokens per session scan A 8b7f1b380ed9

Subscribe to this mod's changes

claude-code-env AGENTS.md is an instructions file published in the GitHub repository cexll/claude-code-env (41 stars, last pushed 10mo ago), licensed MIT. It adds 580 tokens to every session, about $0.0023 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.

claude-code-env AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
claude-code-env AGENTS.mdcexll/claude-code-env	Instructions file	41	10mo ago	MIT	A	580	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

claude-code-env: Instructions file for Codex