Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add instructions/fcakyon/claude-codex-settings/claude-mdgit clone --depth 1 https://github.com/fcakyon/claude-codex-settingsWrote 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/fcakyon/claude-codex-settings/claude-md)<a href="https://agentmods.dev/instructions/fcakyon/claude-codex-settings/claude-md"><img src="https://agentmods.dev/badge/instructions/fcakyon/claude-codex-settings/claude-md.svg" alt="Measured on agentmods" 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 | $0.04944 | $0.04944 |
| Opus 5 | $0.02472 | $0.02472 |
| Sonnet 5 | $0.00989 | $0.00989 |
| Haiku 4.5 | $0.00494 | $0.00494 |
Grade A, and why
claude-codex-settings CLAUDE.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 4d 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 — 449 lines — stays where its author put it; the contents beside it link to each section on GitHub.
claude-settings
AGENTS.mdandGEMINI.mdare symlinks to this file for Codex CLI and Gemini CLI compatibility.
Multi-tool plugin marketplace. Each plugin under plugins/ is independently installable on Claude Code, Codex CLI, Gemini CLI, and Cursor.
Repo Structure
claude-settings/
CLAUDE.md # this file (repo dev guide)
AGENTS.md -> CLAUDE.md # Codex CLI reads this
GEMINI.md -> CLAUDE.md # Gemini CLI reads this
.claude/CLAUDE.md # user-facing global config (synced to ~/.claude/CLAUDE.md)
.claude/settings.json # Claude Code settings
.claude-plugin/marketplace.json # Claude Code marketplace
.agents/plugins/marketplace.json # Codex CLI marketplace
.cursor-plugin/marketplace.json # Cursor marketplace
.codex/config.toml # Codex CLI config
.github/scripts/ # repo maintenance scripts
_helpers.sh # shared sync/zip functions
sync-<vendor>-skills.sh # per-vendor skill sync
sync-versions.sh # version alignment
release.sh # GitHub release creation
validate_plugins.py # CI plugin validation
plugins/
<name>/
.claude-plugin/plugin.json # Claude Code manifest
.codex-plugin/plugin.json # Codex CLI manifest
.cursor-plugin/plugin.json # Cursor manifest
gemini-extension.json # Gemini CLI manifest
skills/<skill>/SKILL.md # universal across all tools
agents/<agent>.md # Claude Code + Gemini + Cursor
hooks/hooks.json + scripts/ # Claude Code + Codex CLI + Gemini
commands/<cmd>.md # Claude Code only
output-styles/<style>.md # Claude Code only
Cross-Tool Plugin Format Reference
Plugin Manifests
Each plugin has 4 manifest files. Claude Code manifest is the source of truth; others are copies or subsets.
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.
- 4d ago First seen · 449 lines · 4,944 tokens per session scan A d2c7c5176645
claude-codex-settings CLAUDE.md is an instructions file published in the GitHub repository fcakyon/claude-codex-settings (1,125 stars, last pushed today), licensed Apache-2.0. It adds 4,944 tokens to every session, about $0.0247 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 2026-08-30.
Other instructions, from other repositories
av CLAUDE.md
Claude Code instructions for aviator-co/av, covering claude.md, project overview, documentation sources, command structure philosophy and development workflow.
skills CLAUDE.md
Claude Code instructions for lovstudio/skills, covering claude.md, what this is, repo layout, how users install and skills.yaml schema.
Dragon-Brain CLAUDE.md
Instructions for iikarus/Dragon-Brain, covering dragon brain — claude.md, the harness, audit remediation (april–may 2026, complete 2026-05-09), the lie this audit closed and the contract that matters now.
cli-continues typescript.instructions.md
Instructions for yigitkonur/cli-continues, covering typescript review guidelines, type safety, discriminated unions, async patterns and import rules.
cli-continues testing.instructions.md
Instructions for yigitkonur/cli-continues, covering test review guidelines, fixture-based testing, conversion coverage, test quality and regression tests.
AgentHarbor AGENTS.md
Instructions for abhiunix/AgentHarbor, a project described as: 🚢 One native app for all your AI coding agents - live rate limits, session usage, deep analysis of your & monthly spend for Claude Code, Cursor, Codex, Gemini etc plus one-click MCP/rules/skills/sub-agent deploy.