Agent skill

Code Kata Generator

A specialized skill for systematically designing coding practice exercises (Code Kata).

Apache-2.0Auto-check passedTesting & QA

Install Code Kata Generator

skills CLI

$ npx skills add revfactory/harness-100 --skill code-kata-generator -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install revfactory/harness-100 code-kata-generator --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/revfactory/harness-100.git skills-src && mkdir -p .claude/skills && cp -r skills-src/en/59-coding-bootcamp/.claude/skills/code-kata-generator .claude/skills/code-kata-generator && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "code-kata-generator" agent skill from https://github.com/revfactory/harness-100/tree/main/en/59-coding-bootcamp/.claude/skills/code-kata-generator into .claude/skills/code-kata-generator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "code-kata-generator", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/revfactory/harness-100/tree/main/en/59-coding-bootcamp/.claude/skills/code-kata-generator

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add revfactory/harness-100 --skill code-kata-generator -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install revfactory/harness-100 code-kata-generator --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/revfactory/harness-100.git skills-src && mkdir -p .agents/skills && cp -r skills-src/en/59-coding-bootcamp/.claude/skills/code-kata-generator .agents/skills/code-kata-generator && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "code-kata-generator" agent skill from https://github.com/revfactory/harness-100/tree/main/en/59-coding-bootcamp/.claude/skills/code-kata-generator into .agents/skills/code-kata-generator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "code-kata-generator", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add revfactory/harness-100 --skill code-kata-generator -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install revfactory/harness-100 code-kata-generator --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/revfactory/harness-100.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/en/59-coding-bootcamp/.claude/skills/code-kata-generator .cursor/skills/code-kata-generator && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "code-kata-generator" agent skill from https://github.com/revfactory/harness-100/tree/main/en/59-coding-bootcamp/.claude/skills/code-kata-generator into .cursor/skills/code-kata-generator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "code-kata-generator", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/revfactory/harness-100.git --path en/59-coding-bootcamp/.claude/skills/code-kata-generator

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add revfactory/harness-100 --skill code-kata-generator -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install revfactory/harness-100 code-kata-generator --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/revfactory/harness-100.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/en/59-coding-bootcamp/.claude/skills/code-kata-generator .gemini/skills/code-kata-generator && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "code-kata-generator" agent skill from https://github.com/revfactory/harness-100/tree/main/en/59-coding-bootcamp/.claude/skills/code-kata-generator into .gemini/skills/code-kata-generator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "code-kata-generator", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install revfactory/harness-100 code-kata-generator

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add revfactory/harness-100 --skill code-kata-generator -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/revfactory/harness-100.git skills-src && mkdir -p .github/skills && cp -r skills-src/en/59-coding-bootcamp/.claude/skills/code-kata-generator .github/skills/code-kata-generator && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "code-kata-generator" agent skill from https://github.com/revfactory/harness-100/tree/main/en/59-coding-bootcamp/.claude/skills/code-kata-generator into .github/skills/code-kata-generator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "code-kata-generator", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add revfactory/harness-100 --skill code-kata-generator -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install revfactory/harness-100 code-kata-generator --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/revfactory/harness-100.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/en/59-coding-bootcamp/.claude/skills/code-kata-generator .opencode/skills/code-kata-generator && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "code-kata-generator" agent skill from https://github.com/revfactory/harness-100/tree/main/en/59-coding-bootcamp/.claude/skills/code-kata-generator into .opencode/skills/code-kata-generator/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "code-kata-generator", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: code-kata-generator
GitHub stars: 1.3k
Token cost: ~1.1k tokens
SKILL.md length: 311 words
Files: 1
Skills in repo: 464
Repo updated: Mar 22, 2026
First seen: Oct 7, 2026
Licence: Apache-2.0

At a glance

A specialized skill for systematically designing coding practice exercises (Code Kata).

Tasks that involve Test generation
SKILL.md covers Target Agent, Exercise Difficulty System, Exercise Template and Concept-to-Exercise Map, plus 2 more sections
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Code Kata Generator is an agent skill from revfactory/harness-100. A specialized skill for systematically designing coding practice exercises (Code Kata). Used by the exercise-creator agent to create difficulty-tiered, concept-specific coding exercises with test cases and model solutions. Automatically applied in contexts such as 'coding exercises', 'algorithm problems', 'practice problems', 'kata', 'coding tests', 'programming practice'. However, online judge system integration (LeetCode, HackerRank) and automated grading infrastructure are outside the scope of this skill.

Its SKILL.md is about 1.1k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Testing & QA, covering Test generation. The licence is Apache-2.0.

When your agent uses it

Tasks that involve Test generation

Example prompts

“coding exercises”
“algorithm problems”
“practice problems”
“/code-kata-generator”

What it can do on your machine

Read from SKILL.md and the folder at commit 8e8d35c. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md (its code samples are markdown).
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Code Kata Generator loads about 1.1k tokens when it runs. Until then it costs about 133 tokens; SKILL.md has 311 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~133
When it runs · the whole SKILL.md, loaded when a task matches: ~1.1k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from revfactory/harness-100 at commit 8e8d35c, republished under its Apache-2.0 licence (© revfactory). 311 words, ~1,114 tokens.

Download SKILL.mdSave it as .claude/skills/code-kata-generator/SKILL.md (or your agent's skills folder).

name: code-kata-generator
description: A specialized skill for systematically designing coding practice exercises (Code Kata). Used by the exercise-creator agent to create difficulty-tiered, concept-specific coding exercises with test cases and model solutions. Automatically applied in contexts such as 'coding exercises', 'algorithm problems', 'practice problems', 'kata', 'coding tests', 'programming practice'. However, online judge system integration (LeetCode, HackerRank) and automated grading infrastructure are outside the scope of this skill.

Code Kata Generator — Coding Exercise Design Tool

A specialized skill that enhances the exercise-creator agent's exercise creation capabilities.

Target Agent

exercise-creator — Difficulty-tiered exercises, test cases, model solutions

Exercise Difficulty System

5-Tier Difficulty Classification

Tier	Name	Concepts	Est. Solving Time	Target Phase
T1	Warm-up	Variables, conditionals, loops, functions	5-15 min	Week 1-2
T2	Foundation	Arrays, strings, basic data structures	15-30 min	Week 3-6
T3	Intermediate	Hash maps, stacks/queues, recursion, sorting	30-60 min	Week 7-12
T4	Advanced	Trees, graphs, DP, binary search	45-90 min	Week 13-20
T5	Challenge	Composite algorithms, system design	60-120 min	Week 20+

Exercise Template

markdown

## [T{N}] {Exercise Name}

### Problem Description
{Clear problem statement}

### Input
- {Input format and constraints}

### Output
- {Output format}

### Examples
| Input | Output | Explanation |
|-------|--------|-------------|
| {Example 1 input} | {Example 1 output} | {Walkthrough} |
| {Example 2 input} | {Example 2 output} | |

### Constraints
- {Time/space complexity requirements}
- {Input size range}

### Hints (optional)
<details>
<summary>Show hint</summary>
{Directional hint}
</details>

### Test Cases
{Basic + edge + large-input cases}

### Model Solution
{Including time complexity and space complexity analysis}

### Learning Points
- {Concept learned from this problem}
- {Real-world application}

Concept-to-Exercise Map

Data Structures

Concept	Required Exercise Types	Tier
Arrays	Two Pointers, Sliding Window	T2-T3
Linked Lists	Reversal, merging, cycle detection	T2-T3
Stacks	Bracket matching, histogram	T2-T3
Queues	BFS, circular queue, priority queue	T3
Hash Maps	Frequency counting, Two Sum, grouping	T2-T3
Trees	Traversal, LCA, balance checking	T3-T4
Graphs	DFS/BFS, shortest path, topological sort	T4-T5

Algorithms

Concept	Required Exercise Types	Tier
Sorting	Sort implementation, custom sorting	T2-T3
Binary Search	Range search, Parametric Search	T3-T4
Recursion	Fibonacci, permutations/combinations, divide & conquer	T3
DP	Knapsack, LIS, grid paths	T4-T5
Greedy	Activity selection, interval scheduling	T3-T4
Backtracking	N-Queens, Sudoku, combinations	T4

Test Case Design Principles

Required Case Types

Type	Purpose	Example
Basic	Verify normal operation	Same as problem examples
Minimum input	Lower boundary value	Empty array, length 1
Maximum input	Performance verification	n = 10^5
Edge	Special situations	All same values, negatives, 0
Reverse/sorted	Sorting-related	Already sorted, reverse sorted
Duplicates	Duplicate handling	Many duplicate elements

Case Count Guide

Tier	Public Cases	Hidden Cases	Performance Cases
T1	3	3	0
T2	3	5	1
T3	3	7	2
T4	3	8	3
T5	3	10	5

Exercise Sequencing Principles

Scaffolding

Arrange exercises on the same topic progressively:

[T2] Find a specific value in an array (linear search)
  |
[T3] Find a value in a sorted array (binary search)
  |
[T3] Find a value in a rotated sorted array
  |
[T4] Find a value in a 2D sorted matrix
  |
[T4] Parametric Search (find optimal value satisfying a condition)

Interleaving

Mix new concepts with previous ones:

During hash map week -> include 1 array review exercise
During tree week -> include 1 recursion review exercise

Files

Just SKILL.md in en/59-coding-bootcamp/.claude/skills/code-kata-generator of revfactory/harness-100.

Open the folder on GitHubat commit 8e8d35c

Compare with similar skills

Code Kata Generator next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Code Kata Generator compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Code Kata Generator this skillrevfactory/harness-100	1.3k	—	~1.1k	Automated safety check: Pass	Apache-2.0	6 mo ago
Emcaklofas/kicad-happy	1.3k	1 repos	~2.8k	Automated safety check: Pass	MIT	yesterday
Swig Testswig/swig	6.3k	—	~2.3k	Automated safety check: Pass	Custom licence	today
Generate Test Cases342164796/generate-test-cases	119	1 repos	~2.9k	Automated safety check: Pass	None	6 mo ago
Verify Cc Safety Netkenryu42/cc-safety-net	1.6k	—	~2k	Automated safety check: Pass	MIT	today
Wioworkersio/skills	180	—	~5.8k	Automated safety check: Pass	MIT	2 mo ago

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Questions about Code Kata Generator

What does Code Kata Generator do?

A specialized skill for systematically designing coding practice exercises (Code Kata). Code Kata Generator is an agent skill from revfactory/harness-100. A specialized skill for systematically designing coding practice exercises (Code Kata).

When should I use Code Kata Generator?

Code Kata Generator fits situations like: tasks that involve Test generation.

How do I install Code Kata Generator in Claude Code?

Run `npx skills add revfactory/harness-100 --skill code-kata-generator -a claude-code`. Or copy the skill folder (en/59-coding-bootcamp/.claude/skills/code-kata-generator in revfactory/harness-100) into .claude/skills/code-kata-generator in your project. Claude Code loads it when a task matches its description.

How do I install Code Kata Generator in Codex?

Run `npx skills add revfactory/harness-100 --skill code-kata-generator -a codex`. Or copy the skill folder (en/59-coding-bootcamp/.claude/skills/code-kata-generator in revfactory/harness-100) into .agents/skills/code-kata-generator in your project. Codex loads it when a task matches its description.

Can I use Code Kata Generator in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add revfactory/harness-100 --skill code-kata-generator -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/code-kata-generator, .gemini/skills/code-kata-generator, .github/skills/code-kata-generator and .opencode/skills/code-kata-generator in your project.

What does Code Kata Generator need to run?

SKILL.md names no scripts, command-line tools or credentials: Code Kata Generator is instructions for the agent only.

Does Code Kata Generator access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Code Kata Generator safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Code Kata Generator use?

Code Kata Generator is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Code Kata Generator use?

About 1.1k tokens (SKILL.md is roughly 4.5k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Code Kata Generator?

Skills that share tags, products or a category with Code Kata Generator: Emc (aklofas/kicad-happy, 1.3k stars), Swig Test (swig/swig, 6.3k stars), Generate Test Cases (342164796/generate-test-cases, 119 stars) and Verify Cc Safety Net (kenryu42/cc-safety-net, 1.6k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Code Kata Generator?

revfactory (a GitHub user) maintains it in revfactory/harness-100, which has 1,290 GitHub stars. The repository holds 464 skills in this directory. The repository was last updated on March 22, 2026.

Source: revfactory/harness-100 on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Code Kata Generator

Facts

At a glance

What it does

When your agent uses it

Example prompts

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Code Kata Generator — Coding Exercise Design Tool

Target Agent

Exercise Difficulty System

5-Tier Difficulty Classification

Exercise Template

Concept-to-Exercise Map

Data Structures

Algorithms

Test Case Design Principles

Required Case Types

Case Count Guide

Exercise Sequencing Principles

Scaffolding

Interleaving

Files

Compare with similar skills

Similar skills

More from revfactory/harness-100

Related

Questions about Code Kata Generator