Borrowing it
Nothing to install: this file belongs to gvastethecreator/codex-studio. 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/gvastethecreator/codex-studio/main/AGENTS.mdgit clone --depth 1 https://github.com/gvastethecreator/codex-studioWrote 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/gvastethecreator/codex-studio/agents-md)<a href="https://agentmods.dev/instructions/gvastethecreator/codex-studio/agents-md"><img src="https://agentmods.dev/badge/instructions/gvastethecreator/codex-studio/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/gvastethecreator/codex-studio/agents-md"><img src="https://agentmods.dev/badge/instructions/gvastethecreator/codex-studio/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 | $0.00809 | $0.00809 |
| Opus 5.5 | $0.00324 | $0.00324 |
| Sonnet 5.5 | $0.00162 | $0.00162 |
| Haiku 4.5 | $0.00081 | $0.00081 |
Grade A, and why
codex-studio 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.
How it starts
The opening of the file, as written. The whole thing — 82 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Codex Studio agent rules
This file is for agents that work in this repo.
Setup
If the user asks for setup, getting started, first run, or onboarding, or if the checkout is not initialized, follow skills/codex-studio-setup/SKILL.md before ad hoc commands.
- Read this file,
README.md, andskills/codex-studio-setup/SKILL.md. - Inspect repo and app-owned runtime state without printing secrets:
git status --short, Codex Runtime Doctor,.env.localpresence, Studio Library init,/api/health, and/api/codex/sessionwhen reachable. - Run
bun installonly when missing or stale dependencies block setup. - Run
bun run studio:initwhen.env.local, the Studio Library, SQLite state, the default library, or the default workspace is missing. - Start the local runtime with
bun run devwhen needed, then confirm the UI and backend are healthy. - If ChatGPT auth is missing, stop. Ask the user to Sign in from Studio Settings, or run
codex loginand choose ChatGPT. - Do not block setup on an exact Bun or Codex release when readiness, supported scripts, app-server support, and Local Codex Session are healthy.
- Close with one validation pass and a short readiness summary.
Commands
Use Bun scripts. Select affected tests at integration; use the full gate for broad changes. Do not run an aggregate and its included checks twice.
bun run test
bun run check
bun run build
bun run validate:fast
bun run validate:full
For focused unit tests:
bun run test -- path/to/test.ts
If rg fails on Windows in this checkout, use PowerShell Get-ChildItem and Select-String.
Safety
- Never delete, move, or rewrite Studio Library data unless the user asks for that action.
- Do not operate on arbitrary paths. Register or import External Output Sources first.
- Do not store Provider Secret values in SQLite, catalog metadata, logs, screenshots, or docs.
- Do not commit
.env.local, generated images, SQLite DBs, transcripts, logs, or local output folders. - Preserve dirty worktree changes that you did not make.
- Never print secrets.
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.
- 1mo ago Changed · +33 tokens per session 0909a206087e
- 1mo ago Changed · -39 lines · -397 tokens per session 8587bb1bc3b6
- 1mo ago First seen · 121 lines · 1,173 tokens per session scan A 8ba194b0ad6e
codex-studio AGENTS.md is an instructions file published in the GitHub repository gvastethecreator/codex-studio (16 stars, last pushed 25d ago), licensed MIT. It adds 809 tokens to every session, about $0.0032 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.
Other instructions, from other repositories
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
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Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
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Copilot instructions for denoland/deno, covering deno development guide for github copilot, network access, high level overview, key directories and key files to understand first.