quantitative-analysis
quantitative-analysis is a skill in cbrock84/headcount, last changed 16 Sept 2026. It can name web addresses.
Answers a business question with data without fooling yourself — framing the question so an answer would change something, choosing the right comparison, checking the data before trusting it, recognizing the traps that produce confident wrong answers (aggregation reversals, survivorship, regression to the mean, multiple comparisons), and reporting uncertainty honestly. Use this to run an analysis, review one before acting on it, or work out why two people looking at the same data reached opposite conclusions.
At a glance
Pattern check
Nothing flagged
That isn't proof the skill is harmless.
Commit 7d3ddf1 · 3 Nov 2026
How the check worksPattern check: nothing flagged
That isn't proof the skill is harmless.
Install
Each tab says whether it installs commit 7d3ddf1, the one we checked, or the latest version.
OpenCode also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.
Goose also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.
Windsurf (Devin Desktop) also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.
Zed also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.
Roo Code also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.
Factory Droid also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.
Junie also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.
Amp also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.
No install command here reaches Kiro. Copy the skill's folder into .kiro/skills/ in your project, or ~/.kiro/skills/ for all your projects. cbrock84/headcount/plugins/data-analytics/skills/quantitative-analysis (opens in a new tab)
Antigravity also looks in .agents/skills/, so the Any agent steps reach it with This project. For All projects, see where Antigravity looks.
Cline also looks in .claude/skills/, so the Claude Code steps reach it with This project. For All projects, see where Cline looks.
Claude Code
Pinned to commit 7d3ddf1, the one we checked.
From your project's root folder:
tmp="$(mktemp -d)" &&git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/cbrock84/headcount.git "$tmp" &&git -C "$tmp" fetch -q --depth 1 origin 7d3ddf170a85a67565cbbdcda4e9539d32e5a2c4 &&git -C "$tmp" sparse-checkout set -- plugins/data-analytics/skills/quantitative-analysis &&git -C "$tmp" checkout -q 7d3ddf170a85a67565cbbdcda4e9539d32e5a2c4 &&mkdir -p .claude/skills &&mkdir .claude/skills/quantitative-analysis &&cp -R "$tmp"/plugins/data-analytics/skills/quantitative-analysis/. .claude/skills/quantitative-analysis/ &&rm -rf "$tmp"If Claude Code was already running and this created the skills folder, run /reload-skills.
Or install the data-analytics plugin it ships in. Installs the latest version, not the one we checked. Installs everything in the plugin, including any hooks, MCP servers and scripts our check doesn't cover.
claude plugin marketplace add cbrock84/headcount --scope project &&claude plugin install data-analytics@headcount --scope projectClaude apps
Pinned to commit 7d3ddf1, the one we checked.
Skills in the Claude apps belong to your account rather than to a project.
Make quantitative-analysis.zip, with the skill folder at the top level:
tmp="$(mktemp -d)" &&git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/cbrock84/headcount.git "$tmp" &&git -C "$tmp" fetch -q --depth 1 origin 7d3ddf170a85a67565cbbdcda4e9539d32e5a2c4 &&git -C "$tmp" sparse-checkout set -- plugins/data-analytics/skills/quantitative-analysis &&git -C "$tmp" checkout -q 7d3ddf170a85a67565cbbdcda4e9539d32e5a2c4 &&out="$(mktemp -d)" &&cp -R "$tmp"/plugins/data-analytics/skills/quantitative-analysis "$out"/quantitative-analysis &&(cd "$out" && zip -qr - quantitative-analysis) > quantitative-analysis.zip &&rm -rf "$tmp" "$out"In Claude, open Customize > Skills, select +, then + Create skill > Upload a skill, and choose quantitative-analysis.zip.
On Free, Pro and Max plans, turn on Code execution and file creation (Create and edit files in newer settings) under Settings > Capabilities.
Codex
Pinned to commit 7d3ddf1, the one we checked.
From your project's root folder:
tmp="$(mktemp -d)" &&git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/cbrock84/headcount.git "$tmp" &&git -C "$tmp" fetch -q --depth 1 origin 7d3ddf170a85a67565cbbdcda4e9539d32e5a2c4 &&git -C "$tmp" sparse-checkout set -- plugins/data-analytics/skills/quantitative-analysis &&git -C "$tmp" checkout -q 7d3ddf170a85a67565cbbdcda4e9539d32e5a2c4 &&mkdir -p .agents/skills &&mkdir .agents/skills/quantitative-analysis &&cp -R "$tmp"/plugins/data-analytics/skills/quantitative-analysis/. .agents/skills/quantitative-analysis/ &&rm -rf "$tmp"Codex picks up new skills on its own; restart it if this one does not appear.
Cursor
Pinned to commit 7d3ddf1, the one we checked.
From your project's root folder:
tmp="$(mktemp -d)" &&git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/cbrock84/headcount.git "$tmp" &&git -C "$tmp" fetch -q --depth 1 origin 7d3ddf170a85a67565cbbdcda4e9539d32e5a2c4 &&git -C "$tmp" sparse-checkout set -- plugins/data-analytics/skills/quantitative-analysis &&git -C "$tmp" checkout -q 7d3ddf170a85a67565cbbdcda4e9539d32e5a2c4 &&mkdir -p .cursor/skills &&mkdir .cursor/skills/quantitative-analysis &&cp -R "$tmp"/plugins/data-analytics/skills/quantitative-analysis/. .cursor/skills/quantitative-analysis/ &&rm -rf "$tmp"Copilot & VS Code
Pinned to commit 7d3ddf1, the one we checked.
From your project's root folder:
tmp="$(mktemp -d)" &&git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/cbrock84/headcount.git "$tmp" &&git -C "$tmp" fetch -q --depth 1 origin 7d3ddf170a85a67565cbbdcda4e9539d32e5a2c4 &&git -C "$tmp" sparse-checkout set -- plugins/data-analytics/skills/quantitative-analysis &&git -C "$tmp" checkout -q 7d3ddf170a85a67565cbbdcda4e9539d32e5a2c4 &&mkdir -p .github/skills &&mkdir .github/skills/quantitative-analysis &&cp -R "$tmp"/plugins/data-analytics/skills/quantitative-analysis/. .github/skills/quantitative-analysis/ &&rm -rf "$tmp"In a running Copilot CLI session, run /skills reload.
Or install it with gh skill, which also installs the commit we checked. Needs GitHub CLI 2.90 or later.
gh skill install cbrock84/headcount plugins/data-analytics/skills/quantitative-analysis/SKILL.md@7d3ddf170a85a67565cbbdcda4e9539d32e5a2c4 --agent github-copilot --scope projectGemini CLI
Pinned to commit 7d3ddf1, the one we checked.
From your project's root folder:
tmp="$(mktemp -d)" &&git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/cbrock84/headcount.git "$tmp" &&git -C "$tmp" fetch -q --depth 1 origin 7d3ddf170a85a67565cbbdcda4e9539d32e5a2c4 &&git -C "$tmp" sparse-checkout set -- plugins/data-analytics/skills/quantitative-analysis &&git -C "$tmp" checkout -q 7d3ddf170a85a67565cbbdcda4e9539d32e5a2c4 &&mkdir -p .gemini/skills &&mkdir .gemini/skills/quantitative-analysis &&cp -R "$tmp"/plugins/data-analytics/skills/quantitative-analysis/. .gemini/skills/quantitative-analysis/ &&rm -rf "$tmp"In a running session, run /skills reload.
Or use Gemini CLI’s own installer. Installs the latest version, not the one we checked.
gemini skills install https://github.com/cbrock84/headcount.git --path plugins/data-analytics/skills/quantitative-analysis --scope workspaceAny agent
Pinned to commit 7d3ddf1, the one we checked.
OpenCode, Goose, Windsurf (Devin Desktop), Zed, Roo Code, Factory Droid, Junie, Amp and Antigravity read .agents/skills in a project.
From your project's root folder:
tmp="$(mktemp -d)" &&git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/cbrock84/headcount.git "$tmp" &&git -C "$tmp" fetch -q --depth 1 origin 7d3ddf170a85a67565cbbdcda4e9539d32e5a2c4 &&git -C "$tmp" sparse-checkout set -- plugins/data-analytics/skills/quantitative-analysis &&git -C "$tmp" checkout -q 7d3ddf170a85a67565cbbdcda4e9539d32e5a2c4 &&mkdir -p .agents/skills &&mkdir .agents/skills/quantitative-analysis &&cp -R "$tmp"/plugins/data-analytics/skills/quantitative-analysis/. .agents/skills/quantitative-analysis/ &&rm -rf "$tmp"Or use the skills CLI from skills.sh. Installs the latest version, not the one we checked. The skills CLI reports installs to skills.sh unless you set DISABLE_TELEMETRY=1.
npx skills@1.7.4 add cbrock84/headcount --skill quantitative-analysisWhat it can touch
From the files and frontmatter at commit 7d3ddf1. This is how much a skill can do, not whether it is risky.
Pattern check
Pattern check: nothing flagged · commit 7d3ddf1 · 3 Nov 2026
We checked every text file in this skill, at commit 7d3ddf1 on 3 Nov 2026, against 45 published patterns such as download-and-run commands, hidden text and credential access. We don't run the skill, we don't read the web pages it points to, and we can't judge everything its instructions might lead an agent to do. In published tests, pattern checks like this one missed most malicious skills. Read the skill before you install it — especially anything it asks you to download or run.
How the check worksReport an incorrect finding
Outside links we did not follow
- https://www.bls.gov/opub/hom/
- https://www.bls.gov/developers/
- https://www.itl.nist.gov/div898/handbook/
- https://www.census.gov/about/policies/quality/standards.html
Format check
Each agent reads SKILL.md a little differently. We check the file against each one's published rules; we don't run the skill in any agent.
Agent Skills specPasses
The open format from agentskills.io, held to the strictest version of each rule among the agents we check.
- Note
The first sentence of the description is 371 characters. Agents shorten long descriptions, so lead with the main job. D8
Fix: Start with one short sentence that names the job.
- Note
There is no license field, so readers can't tell whether they may reuse the skill. O2
Fix: Add license: with an SPDX name such as MIT or Apache-2.0, or the name of a bundled licence file.
- Note
Claude CodePasses
Claude Code reads its own extra fields, ignores unknown ones, and still loads a skill whose frontmatter is broken, without its fields.
- Note
The first sentence of the description is 371 characters. Agents shorten long descriptions, so lead with the main job. D8
Fix: Start with one short sentence that names the job.
- Note
Claude apps & API uploadPasses
Uploading to claude.ai or the Claude API, or packaging with Anthropic's script, accepts only the six spec fields and stops on anything else.
- Note
The description is 514 characters. The claude.ai Help Center says 200 at most, though Anthropic's API docs and validator allow 1,024. D4
Fix: If the claude.ai upload refuses it, trim the description to 200 characters.
- Note
OpenAI (Codex & API)Passes
Codex finds SKILL.md by its exact name and needs a description; OpenAI's Skills API checks the frontmatter against the spec and caps uploads.
- Note
The first sentence of the description is 371 characters. Agents shorten long descriptions, so lead with the main job. D8
Fix: Start with one short sentence that names the job.
- Note
- VS Code & CopilotPasses
SKILL.md
Files
2 files
| Path | Size |
|---|---|
| SKILL.md (opens in a new tab) | 4.9 KB |
| references/sources.md (opens in a new tab) | 1.6 KB |
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