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Agent skill

JSON Schema Maker

by zhuyansen in zhuyansen/agent-skills-hub

Infer a JSON Schema from example JSON documents, marking which fields are required.

MITAuto-check passed

Install JSON Schema Maker

skills CLI
$ npx skills add zhuyansen/agent-skills-hub --skill json-schema-maker -a claude-code

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

GitHub CLI
$ gh skill install zhuyansen/agent-skills-hub json-schema-maker --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/zhuyansen/agent-skills-hub.git skills-src && mkdir -p .claude/skills && cp -r skills-src/ops/skillmgr-runs/in/input/library/json-schema-maker .claude/skills/json-schema-maker && 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/

Facts

Skill name
json-schema-maker
GitHub stars
413
Token cost
~189 tokens
SKILL.md length
114 words
Files
1
Skills in repo
21
Repo updated
First seen
Licence
MIT

At a glance

Infer a JSON Schema from example JSON documents, marking which fields are required.

  • Works in 3 steps: Read the input the user points to. If… → Do the task described above, step by… → Show the result, then a short list of…
  • SKILL.md covers When to use, Steps and Notes
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

JSON Schema Maker is an agent skill from zhuyansen/agent-skills-hub. Infer a JSON Schema from example JSON documents, marking which fields are required.

Its SKILL.md is about 190 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

The repository describes itself as: Discover and compare open-source Agent Skills, tools & MCP servers — with quality scoring, trending analysis, and automated GitHub sync. The licence is MIT.

Example prompts

  • “/json-schema-maker”

Workflow steps

3 steps, taken from the first numbered list in SKILL.md.

  1. Read the input the user points to. If none is given, ask for the file or text.
  2. Do the task described above, step by step, and keep the user's own wording where it matters.
  3. Show the result, then a short list of what you changed or found, so the user can check it.

What it can do on your machine

Read from SKILL.md and the folder at commit 2862275. 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.

    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

JSON Schema Maker loads about 189 tokens when it runs. Until then it costs about 25 tokens; SKILL.md has 114 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~25
When it runs · the whole SKILL.md, loaded when a task matches
~189

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 zhuyansen/agent-skills-hub at commit 2862275, republished under its MIT licence (© zhuyansen). 114 words, ~189 tokens.

Download SKILL.mdSave it as .claude/skills/json-schema-maker/SKILL.md (or your agent's skills folder).
name
json-schema-maker
description
Infer a JSON Schema from example JSON documents, marking which fields are required.

Json Schema Maker

Infer a JSON Schema from example JSON documents, marking which fields are required.

When to use

Use this skill when the user asks for it by name or describes this task. Do not use it for unrelated work.

Steps

  1. Read the input the user points to. If none is given, ask for the file or text.
  2. Do the task described above, step by step, and keep the user's own wording where it matters.
  3. Show the result, then a short list of what you changed or found, so the user can check it.

Notes

  • Keep changes small and reversible.
  • Say plainly when the input is incomplete instead of guessing.

© zhuyansen, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in ops/skillmgr-runs/in/input/library/json-schema-maker of zhuyansen/agent-skills-hub.

Open the folder on GitHubat commit 2862275

Compare with similar skills

JSON Schema Maker 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.

JSON Schema Maker compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
JSON Schema Maker this skillzhuyansen/agent-skills-hub413—~189Automated safety check: PassMIT
Ito Inferenceaffaan-m/ECC277k1 repos~1.5kAutomated safety check: PassMIT
Gke Inferencegoogle/skills21k—~2kAutomated safety check: PassApache-2.0
LLM Inference Scalingsickn33/agentic-awesome-skills47k1 repos~2.1kAutomated safety check: PassMIT
Debug InferenceNVIDIA/OpenShell16k—~1.9kAutomated safety check: PassApache-2.0
Diagram Makeropenclaw/openclaw392k2 repos~589Automated safety check: PassMIT

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Questions about JSON Schema Maker

What does JSON Schema Maker do?

Infer a JSON Schema from example JSON documents, marking which fields are required. JSON Schema Maker is an agent skill from zhuyansen/agent-skills-hub. Infer a JSON Schema from example JSON documents, marking which fields are required.

How do I install JSON Schema Maker in Claude Code?

Run `npx skills add zhuyansen/agent-skills-hub --skill json-schema-maker -a claude-code`. Or copy the skill folder (ops/skillmgr-runs/in/input/library/json-schema-maker in zhuyansen/agent-skills-hub) into .claude/skills/json-schema-maker in your project. Claude Code loads it when a task matches its description.

How do I install JSON Schema Maker in Codex?

Run `npx skills add zhuyansen/agent-skills-hub --skill json-schema-maker -a codex`. Or copy the skill folder (ops/skillmgr-runs/in/input/library/json-schema-maker in zhuyansen/agent-skills-hub) into .agents/skills/json-schema-maker in your project. Codex loads it when a task matches its description.

Can I use JSON Schema Maker 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 zhuyansen/agent-skills-hub --skill json-schema-maker -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/json-schema-maker, .gemini/skills/json-schema-maker, .github/skills/json-schema-maker and .opencode/skills/json-schema-maker in your project.

What does JSON Schema Maker need to run?

SKILL.md names no scripts, command-line tools or credentials: JSON Schema Maker is instructions for the agent only.

Does JSON Schema Maker 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 JSON Schema Maker 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 JSON Schema Maker use?

JSON Schema Maker is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does JSON Schema Maker use?

About 189 tokens (SKILL.md is roughly 756 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 JSON Schema Maker?

Skills that share tags, products or a category with JSON Schema Maker: Ito Inference (affaan-m/ECC, 277k stars), Gke Inference (google/skills, 21k stars), LLM Inference Scaling (sickn33/agentic-awesome-skills, 47k stars) and Debug Inference (NVIDIA/OpenShell, 16k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains JSON Schema Maker?

zhuyansen (a GitHub user) maintains it in zhuyansen/agent-skills-hub, which has 413 GitHub stars. The repository holds 21 skills in this directory. The repository was last updated on October 10, 2026.

Source: zhuyansen/agent-skills-hub on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.