skill-121

skill-121 is a skill for Claude Code, Codex from legendtkl/agentic-skill-router. It costs 27 tokens per session (251 once invoked), scanned A, original, MIT.

A general guide to analyzing data from CSV, spreadsheet, JSON, and text files. It covers cleaning data, calculating descriptive statistics, making charts, and writing reports.

In plain words
What is it for?
Use it to remove duplicates, standardize values, summarize distributions, create charts, report key metrics, and track analysis changes.
Why use it?
It provides a repeatable process for checking data quality, finding basic patterns, and documenting how conclusions were reached.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to remove duplicates, standardize values, summarize distributions, create charts, report key metrics, and track analysis changes.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/legendtkl/agentic-skill-router/skill-121
Install

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.

Any agent
npx skills add legendtkl/agentic-skill-router --skill skill-121
Clone the repo
git clone --depth 1 https://github.com/legendtkl/agentic-skill-router

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for skill-121

README.md
[![agentmods](https://agentmods.dev/badge/skills/legendtkl/agentic-skill-router/skill-121/github.svg)](https://agentmods.dev/skills/legendtkl/agentic-skill-router/skill-121)
Your own site
<a href="https://agentmods.dev/skills/legendtkl/agentic-skill-router/skill-121"><img src="https://agentmods.dev/badge/skills/legendtkl/agentic-skill-router/skill-121/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for skill-121

Your own site · 80×15
<a href="https://agentmods.dev/skills/legendtkl/agentic-skill-router/skill-121"><img src="https://agentmods.dev/badge/skills/legendtkl/agentic-skill-router/skill-121.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 27 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 251 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00027 $0.00251
Opus 5 $0.00014 $0.00125
Sonnet 5 $0.00005 $0.00050
Haiku 4.5 $0.00003 $0.00025

Measured 7d ago against content hash 041bd9dbb977, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

skill-121 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 7d 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.

experiments/dci-compare/skillrouter-skills/skill-121/SKILL.md · 36 lines

What it actually says

Requirements for Outputs

Data Handling Standards

File Support

  • The suite should support various file formats including .csv, .xlsx, .json, and .txt.
  • Users should ensure that data files are accessible and correctly formatted before analysis.

General Data Cleaning Guidelines

  • Each dataset should be reviewed for completeness and accuracy prior to analysis.
  • Remove any duplicate rows and standardize formats where necessary.

Data Analysis Techniques

Fundamental Techniques

  • Use descriptive statistics to summarize data distributions.
  • Visualize data using bar charts, histograms, and scatter plots.

Reporting Insights

  • Compile findings into a report format, summarizing key metrics and insights derived from the analysis.
  • Visual elements should be included in reports to enhance understanding of the data.

Documentation Standards

Reporting Procedures

  • Clearly document the methods and processes used during data analysis.
  • Include references to external sources of data and the methodologies applied.

Version Control

  • Maintain versioning of data analyses to track changes and updates over time.
Changes

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.

  1. 7d ago First seen · 36 lines · 27 tokens per session scan A 041bd9dbb977

Subscribe to this mod's changes

skill-121 is a skill published in the GitHub repository legendtkl/agentic-skill-router (5 stars, last pushed 3mo ago), licensed MIT. It adds 27 tokens to every session and 251 once invoked, about $0.0001 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 2026-09-03.