Codex Sandbox Evidence includes worked examples; pricing or quota commentary; at least one code block. The SKILL.md runs to about 1,370 words, in the catalog's typical mid-range.
Codex Sandbox Evidence sits in the General category under the general-misc sub-topic in the ClaudSkills catalog. There are 10 related skills indexed alongside it; comparing a few before installing usually reveals which fits your workflow best.
These notes are auto-generated from features detected in the SKILL.md file and from this catalog's structure — they aren't part of the source repository.
Run codex exec with the tightest sandbox the task allows and capture a JSONL proof surface the validator can read back — the event stream, an optional schema-constrained final message, and the exit code. Least privilege in, evidence out.
Codex Sandbox Evidence is a community-contributed Claude Code skill in the general-misc sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/codex-sandbox-evidence/ and loads when your prompt matches the skill's trigger.
When to invoke it: Use when running codex exec in a least-privilege sandbox with machine-checkable proof.
The Codex Sandbox Evidence Claude Code skill is built for Claude Code users and developers across all disciplines looking for general-purpose AI assistance. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 119,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).
mkdir -p ~/.claude/skills/codex-sandbox-evidence curl -L https://claudskills.com/skills/codex-sandbox-evidence/SKILL.md \ -o ~/.claude/skills/codex-sandbox-evidence/SKILL.md
Or just download SKILL.md directly and drop it into ~/.claude/skills/codex-sandbox-evidence/. Claude Code auto-discovers it on next session.
Skills live at ~/.claude/skills/codex-sandbox-evidence/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\codex-sandbox-evidence\SKILL.md on Windows. See the full install guide for step-by-step instructions.
Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →
The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.
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SKILL.md from the source repository to ~/.claude/skills/codex-sandbox-evidence/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Codex Sandbox Evidence is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the General category. Learn more at /learn/what-is-a-claude-skill/.If you reference this skill in a blog post, paper, or documentation, you can cite it as:
@misc{codex-sandbox-evidence-2026,
author = {boshu2},
title = {Codex Sandbox Evidence [Claude Code skill]},
year = {2026},
publisher = {ClaudSkills},
url = {https://claudskills.com/skills/codex-sandbox-evidence/}
}Browse all General skills in the ClaudSkills registry, or explore these other picks from the same category:
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SKILL.md files, not affiliated with, endorsed by, or sponsored by Anthropic.