jqschema

jqschema is a skill for Claude Code, Codex from github/gh-aw. It costs 15 tokens per session (260 once invoked), scanned A, original, MIT.

A shell script that examines JSON input and reports its structure as a compact schema, including keys and value types. jq is a command-line tool for querying and transforming JSON.

In plain words
What is it for?
Use it to inspect files or command output and identify object fields, arrays, and data types.
Why use it?
It lets you understand unfamiliar JSON before writing queries or processing code for it.

Skill for Claude CodeCodex ✓ vendor

Which agent this was written for is unclear — Copilot chat-mode frontmatter (tools: vscode/*). Also seen: Copilot chat-mode frontmatter (tools: vscode/*).

Good fit Use it to inspect files or command output and identify object fields, arrays, and data types.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/github/gh-aw/jqschema
About the project

GitHub Agentic Workflows is a GitHub CLI extension that lets developers define AI-assisted repository automation in Markdown and run it through GitHub Actions. It is intended for tasks requiring interpretation or reasoning, such as issue triage, pull-request review, CI investigation, documentation maintenance, and dependency analysis. The catalogue entries provide skills and agents for working with these workflows.

github/gh-aw · 5,579 stars · on GitHub · gh.io

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 github/gh-aw --skill jqschema
Clone the repo
git clone --depth 1 https://github.com/github/gh-aw

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 jqschema

README.md
[![agentmods](https://agentmods.dev/badge/skills/github/gh-aw/jqschema/github.svg)](https://agentmods.dev/skills/github/gh-aw/jqschema)
Your own site
<a href="https://agentmods.dev/skills/github/gh-aw/jqschema"><img src="https://agentmods.dev/badge/skills/github/gh-aw/jqschema/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 jqschema

Your own site · 80×15
<a href="https://agentmods.dev/skills/github/gh-aw/jqschema"><img src="https://agentmods.dev/badge/skills/github/gh-aw/jqschema.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 15 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 260 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00015 $0.00260
Opus 5.5 $0.00006 $0.00104
Sonnet 5.5 $0.00003 $0.00052
Haiku 4.5 $0.00002 $0.00026

Measured 2mo ago against content hash 02f0d562f6fd, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

jqschema 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 2mo ago.

The scan reads SKILL.md. This mod also ships 1 executable file (jqschema.sh), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

.github/skills/jqschema/SKILL.md · 24 lines

What it actually says

jqschema - JSON Schema Discovery

Use ./.github/skills/jqschema/jqschema.sh to generate a compact structural schema (keys + types) from JSON input. Pipe any JSON source through it to discover structure before querying full data.

# Analyze a file or command output
cat data.json | ./.github/skills/jqschema/jqschema.sh
gh api search/repositories?q=language:go | ./.github/skills/jqschema/jqschema.sh

The script replaces object values with type names ("string", "number", "boolean", "null"), reduces arrays to first-element structure, and outputs compact JSON. Use perPage: 1 to fetch minimal data when exploring unknown API shapes.

Example: {"total_count":1000,"items":[{"login":"user1","id":123}]} → {"total_count":"number","items":[{"login":"string","id":"number"}]}

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 2mo ago First seen · 24 lines · 15 tokens per session scan A 02f0d562f6fd

Subscribe to this mod's changes

jqschema is a skill published in the GitHub repository github/gh-aw (5,579 stars, last pushed yesterday), licensed MIT. It adds 15 tokens to every session and 260 once invoked, about $0.0001 per session on Opus 5.5. 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 2026-08-30.

Related

jqschema compared with skills from other repositories

jqschema next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
jqschemagithub/gh-awSkill5.6kyesterdayMITA15Claude Code, Codex
habit-hooks-promptinghabit-hooks/habit-hooksSkill2501mo agoMITA61Claude Code, Codex
watch-prjustincampbell/gh-watchSkill47d agoMITA48Claude Code
watch-tagjustincampbell/gh-watchSkill47d agoMITA62Claude Code
watch-branchjustincampbell/gh-watchSkill47d agoMITA45Claude Code
watch-commitjustincampbell/gh-watchSkill47d agoMITA48Claude Code
prompt-regression-gatealivirgo/Major-AI-SkillsSkill2yesterdayMITA53Claude Code