ClaudSkills / General / agents-skills-meta

Skill Counterfactual Audit

Q: What is a Claude Code skill and how does the Skill Counterfactual Audit skill fit in?

A Claude Code skill is a 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. Skill Counterfactual Audit is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the General category. Learn more at https://claudskills.com/learn/what-is-skill-md/.

Category: General · Sub-category: agents-skills-meta · Last updated: 2026-06-06

type:audit

Audit a skill by running a paired probe — the same task once with the skill loaded and once without — segment both traces into goal-directed phases, align phases, and emit a SIP report (surface anchoring, template copy, excess planning, task recovery, off-task artifact). Use whenever a skill is created, modified, or proposed for retirement. Pass-rate is BLIND to most skill effects: CTA (arxiv 2605.11946v1) shows a single skill can produce 522 measurable behavioural changes across 49 tasks while pass-rate moves only +0.3%. Triggers: "audit this skill", "is this skill helping", "retire skill", "before shipping skill", "behavioural impact of skill X", or any skill review event.

About this skill (catalog notes)

Skill Counterfactual Audit includes explicit scope boundaries (an explicit 'when not to use' or 'out of scope' section). The SKILL.md is on the shorter side at about 469 words.

Original author: Tibsfox
Indexed lastmod: 2026-06-06
Catalog position: General · agents-skills-meta
Indexed related skills: 10

How Skill Counterfactual Audit fits the catalog

Skill Counterfactual Audit sits in the General category under the agents-skills-meta 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.

What this skill does

Skill Counterfactual Audit is a community-contributed Claude Code skill in the agents-skills-meta sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/skill-counterfactual-audit/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use whenever a skill is created, modified, or proposed for retirement. Pass-rate is BLIND to most skill effects: CTA (arxiv 2605.

Who uses this skill

The Skill Counterfactual Audit 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 93,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/skill-counterfactual-audit
curl -L https://claudskills.com/skills/skill-counterfactual-audit/SKILL.md \
  -o ~/.claude/skills/skill-counterfactual-audit/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/skill-counterfactual-audit/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/skill-counterfactual-audit/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\skill-counterfactual-audit\SKILL.md on Windows. See the full install guide for step-by-step instructions.

📱 Install from your phone or desktop Telegram

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 →

Pro

One-click install via the desktop app

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.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Skill Counterfactual Audit Claude Code skill?

Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/skill-counterfactual-audit/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.

What does the Skill Counterfactual Audit skill do?

Is this skill free to install?

Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.

When should I use the Skill Counterfactual Audit skill?

Use Skill Counterfactual Audit when your Claude Code task falls under the General category — specifically in the agents skills meta area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Skill Counterfactual Audit" or describe the task and let Claude pick). Browse related skills at /category/general/.

What is a Claude Code skill and how does the Skill Counterfactual Audit skill fit in?

A Claude Code skill is a 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. Skill Counterfactual Audit 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/.

Attribution & license

Source: https://github.com/Tibsfox/gsd-skill-creator/blob/HEAD/project-claude/skills/skill-counterfactual-audit/SKILL.md
Author: Tibsfox

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA

Tibsfox. (2026). Skill Counterfactual Audit [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/skill-counterfactual-audit/

BibTeX

@misc{skill-counterfactual-audit-2026,
  author    = {Tibsfox},
  title     = {Skill Counterfactual Audit [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/skill-counterfactual-audit/}
}

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