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 skills/darshitpp/x-agent/codexnpx skills add darshitpp/x-agent --skill codexgit clone --depth 1 https://github.com/darshitpp/x-agentWhat 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 | $0.00085 | $0.00254 |
| Opus 5 | $0.00043 | $0.00127 |
| Sonnet 5 | $0.00017 | $0.00051 |
| Haiku 4.5 | $0.00009 | $0.00025 |
Grade A, and why
codex 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 yesterday.
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.
Copies of this mod
1 near-identical copy found in the catalogue:
- opencode — 86% identical, 18 lines differ
What it actually says
Cross-Agent Task Runner — OpenAI Codex CLI
Procedures
Step 1: Self-Call Detection
- Check for
codexin process ancestry (no dedicated env var exists for Codex CLI). - If detected, stop and inform the user: "Cannot invoke Codex from within Codex. Use a different target CLI."
Step 2: Execute Shared Procedure
- Read
references/shared-procedure.mdfor the core workflow (mode inference, context gathering, prompt construction, result presentation). - Read
references/cli-codex.mdfor Codex-specific flags, model selection heuristics, and version compatibility matrix. - Follow the shared procedure using the Codex-specific details.
What ships with it
3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- yesterday First seen · 28 lines · 85 tokens per session scan A 691bd053a8a7
codex is a skill published in the GitHub repository darshitpp/x-agent (2 stars, last pushed 23d ago), licensed MIT. It adds 85 tokens to every session and 254 once invoked, about $0.0004 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 2026-08-31.
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