yaml-master

Q: How do I install yaml-master?

Run npx skills add https://github.com/jeremylongshore/tons-of-skills-marketplace --skill yaml-master in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/yaml-master/ (personal) or .claude/skills/yaml-master/ (project).

by jeremylongshore

Execute proactive YAML intelligence: automatically activates when working with YAML files. Use when appropriate context detected. Trigger with relevant phrases based on skill purpose.

Installs: 68
Last 24h: —
Trending rank: —
Security: Not audited

Install

Works with every agent the skills CLI supports.

npx skills add https://github.com/jeremylongshore/tons-of-skills-marketplace --skill yaml-master

01
Install
Run the command in your project. The CLI asks which agents to install for.
02
Describe the task
Ask your agent for something this skill covers. It loads yaml-master automatically when relevant.
03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.

SKILL.md

The instructions your agent reads when the skill is triggered.

YAML Master

Proactive YAML intelligence: validate syntax, enforce consistent formatting, and keep configuration files schema-correct (Kubernetes, GitHub Actions, Docker Compose, and similar).

Overview

This skill activates when working with .yml/.yaml files to detect structural issues early (indentation, anchors, type mismatches), and to produce safe, minimal edits that keep CI/config tooling happy.

Prerequisites

The YAML file(s) to inspect and their intended target (e.g., Kubernetes, GitHub Actions, Compose)
Any relevant schema or constraints (when available)
Permission to edit the file(s) (or to propose a patch)

Instructions

Parse and validate YAML syntax (identify the first breaking error and its location).
Normalize formatting (indentation, quoting) without changing semantics.
Validate structure against the target system’s expectations (keys, types, required fields).
Identify risky patterns (duplicate keys, ambiguous scalars, anchors used incorrectly).
Output a minimal patch plus a short validation checklist (what to run next).

Output

Corrected YAML with minimal diffs
A concise list of issues found (syntax vs schema vs best practice)
Follow-up validation commands appropriate for the target (e.g., kubectl apply --dry-run=client, CI lint)

Error Handling

If the schema/target is unknown, ask for the target system and apply syntax-only fixes first.
If the YAML is valid but tooling still fails, surface the exact downstream error and reconcile expectations.

Examples

Example: Fix an indentation/syntax error

Input: a workflow with a mis-indented steps: block.
Output: corrected indentation and a note on which job/step was affected.

Example: Convert JSON to YAML safely

Input: a JSON config blob.
Output: YAML with explicit quoting where necessary to avoid type surprises.

Resources

Full detailed guide (kept for reference): ${CLAUDE_SKILL_DIR}/references/SKILL.full.md
YAML spec: https://yaml.org/spec/
GitHub Actions workflow syntax: https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions

FAQ

What does the yaml-master skill do?

Execute proactive YAML intelligence: automatically activates when working with YAML files. Use when appropriate context detected. Trigger with relevant phrases based on skill purpose.

How do I install yaml-master?

Run npx skills add https://github.com/jeremylongshore/tons-of-skills-marketplace --skill yaml-master in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/yaml-master/ (personal) or .claude/skills/yaml-master/ (project).

Which AI agents can use yaml-master?

Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.

Is yaml-master safe to install?

No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.

Who maintains yaml-master?

It is published by jeremylongshore in jeremylongshore/tons-of-skills-marketplace. It has 68 recorded installs.