Borrowing it
Nothing to install: this file belongs to iamcc30/codexm. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/iamcc30/codexm/main/AGENTS.mdgit clone --depth 1 https://github.com/iamcc30/codexmWrote 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.
[](https://agentmods.dev/instructions/iamcc30/codexm/agents-md)<a href="https://agentmods.dev/instructions/iamcc30/codexm/agents-md"><img src="https://agentmods.dev/badge/instructions/iamcc30/codexm/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.
<a href="https://agentmods.dev/instructions/iamcc30/codexm/agents-md"><img src="https://agentmods.dev/badge/instructions/iamcc30/codexm/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00612 | $0.00612 |
| Opus 5.5 | $0.00245 | $0.00245 |
| Sonnet 5.5 | $0.00122 | $0.00122 |
| Haiku 4.5 | $0.00061 | $0.00061 |
Grade A, and why
codexm 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.
How it starts
The opening of the file, as written. The whole thing — 59 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Repository Guidelines
Project Structure & Module Organization
codexm is a Go 1.22 command-line application. The executable entry point is
cmd/codexm/main.go. Core packages live under internal/: cli parses commands,
config manages profiles and project bindings, codex invokes the upstream
Codex CLI, and sharedmcp synchronizes MCP configuration. Tests sit beside their
packages as *_test.go. Shell and PowerShell helpers are in scripts/;
cross-platform release automation lives in .github/workflows/release.yml.
User-facing documentation is maintained in both README.md and
README.zh-CN.md. Generated binaries and archives belong in bin/ or dist/
and must not be committed.
Build, Test, and Development Commands
go build -o codexm ./cmd/codexmbuilds a local executable.go test ./...runs all package tests.go vet ./...performs standard Go static analysis.go fmt ./...formats all Go sources../scripts/build-all.sh devtests and creates archives for supported Linux, macOS, and Windows targets underdist/.
Run the formatter, tests, and vet before opening a pull request. The external
codex executable is required for manual end-to-end CLI checks.
Coding Style & Naming Conventions
Follow idiomatic Go and let gofmt determine indentation and layout. Use short,
lowercase package names; exported identifiers use PascalCase, unexported
identifiers use camelCase. Keep command handlers consistent with the existing
cmdXxx methods in internal/cli. Return errors with useful context, preserve
wrapped causes where appropriate, and avoid exposing credentials or profile
secrets in output.
Testing Guidelines
Use Go's standard testing package. Name tests TestBehaviorOrScenario and keep
fixtures isolated with t.TempDir(). Add regression tests beside the changed
package for bug fixes and cover both success and failure paths. There is no
numeric coverage target; prioritize profile isolation, path resolution,
configuration preservation, and idempotent synchronization behavior.
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 · 59 lines · 612 tokens per session scan A 0f8c3aa60fd2
codexm AGENTS.md is an instructions file published in the GitHub repository iamcc30/codexm (2 stars, last pushed 2d ago), licensed MIT. It adds 612 tokens to every session, about $0.0024 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.
codexm AGENTS.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| codexm AGENTS.mdiamcc30/codexm | Instructions file | 2 | 2d ago | MIT | A | 612 | Codex, OpenCode |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 9,719 | GitHub Copilot |
| next.js AGENTS.mdvercel/next.js | Instructions file | 143k | yesterday | MIT | A | 7,461 | Codex, OpenCode |
| langchain AGENTS.mdlangchain-ai/langchain | Instructions file | 149k | yesterday | MIT | A | 4,680 | Codex, OpenCode |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 5,516 | GitHub Copilot |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 3,093 | GitHub Copilot |
| deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness | Instructions file | 274k | 2d ago | MIT | A | 4,313 | Codex, OpenCode |