Borrowing it
Nothing to install: this file belongs to cheolwanpark/codex-client. 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/cheolwanpark/codex-client/main/AGENTS.mdgit clone --depth 1 https://github.com/cheolwanpark/codex-clientWrote 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/cheolwanpark/codex-client/agents-md)<a href="https://agentmods.dev/instructions/cheolwanpark/codex-client/agents-md"><img src="https://agentmods.dev/badge/instructions/cheolwanpark/codex-client/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/cheolwanpark/codex-client/agents-md"><img src="https://agentmods.dev/badge/instructions/cheolwanpark/codex-client/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 | $0.00354 | $0.00354 |
| Opus 5.5 | $0.00142 | $0.00142 |
| Sonnet 5.5 | $0.00071 | $0.00071 |
| Haiku 4.5 | $0.00035 | $0.00035 |
Grade A, and why
codex-client 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.
What it actually says
Repo Agent Notes
- Read DESIGN.md before changing protocol-facing code.
schema/is the source of truth for wire shapes.DESIGN.mdis the source of truth for shared layering and lifecycle rules.- Keep bindings parallel where practical. Treat
python/as the behavioral reference when building outtypescript/. - Build the TypeScript binding bottom-up: messages/errors -> codec -> transport -> connection -> typed client -> runtime.
- The TypeScript package now includes all 3 layers. Preserve the separation between generated protocol surface and handwritten client/runtime logic.
- If protocol-facing TypeScript types or wrapper methods change, update the codegen source and regenerate the checked-in files in
typescript/src/generated*.ts. - Keep new TypeScript helpers limited to parity-oriented payload builders and documented runtime ergonomics. Do not add higher-level workflow helpers unless the task explicitly asks for them.
- Prefer parity tests against the Python low-level behavior before introducing TypeScript-only abstractions.
- Keep the TypeScript package Node-focused until a task explicitly asks for additional runtimes or transports.
- When repo docs mention available bindings or TypeScript support level, keep them accurate now that the runtime layer exists.
- Run TypeScript examples through the checked-in
pnpm example:*scripts.pnpm examples:buildcompilessrc/andexamples/intotypescript/.examples-dist/for local example execution. - If a commit is requested, follow the existing Conventional Commit pattern from
git logsuch asfeat: ...,fix: ...,docs: ..., orrefactor: ....
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 · 15 lines · 354 tokens per session scan A 1bfa83dab117
codex-client AGENTS.md is an instructions file published in the GitHub repository cheolwanpark/codex-client (7 stars, last pushed 8mo ago), licensed MIT. It adds 354 tokens to every session, about $0.0014 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.
codex-client AGENTS.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| codex-client AGENTS.mdcheolwanpark/codex-client | Instructions file | 7 | 8mo ago | MIT | A | 354 | Codex, OpenCode |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | 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 | today | MIT | A | 4,680 | Codex, OpenCode |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 5,516 | GitHub Copilot |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 3,093 | GitHub Copilot |
| deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness | Instructions file | 275k | 2d ago | MIT | A | 4,313 | Codex, OpenCode |