fix(obsidian-kb): restore files and shorten description

skills/github-action-gen/SKILL.md

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----
-name: github-action-gen
-description: Generate GitHub Actions workflows from plain English. Use when setting up CI.
----
-
-# GitHub Action Generator
-
-Stop copy-pasting workflow YAML from StackOverflow. Describe what you want and get a working GitHub Actions workflow.
-
-**One command. Zero config. Just works.**
-
-## Quick Start
-
-```bash
-npx ai-github-action "test and deploy on push to main"
-```
-
-## What It Does
-
-- Generates complete GitHub Actions workflow files
-- Handles common patterns like test, build, deploy
-- Includes caching for faster runs
-- Supports multiple deploy targets
-
-## Usage Examples
-
-```bash
-# Test and deploy
-npx ai-github-action "test and deploy on push to main"
-
-# PR checks
-npx ai-github-action "run eslint and prettier on PRs" --install
-
-# Docker workflow
-npx ai-github-action "build docker image and push to ECR" -o deploy.yml
-
-# Scheduled job
-npx ai-github-action "run database backup every night at 2am"
-```
-
-## Best Practices
-
-- **Use secrets** - never hardcode credentials
-- **Cache dependencies** - saves minutes per run
-- **Fail fast** - run quick checks first
-- **Use matrix builds** - test multiple node versions
-
-## When to Use This
-
-- Setting up CI for a new repo
-- Adding deployment automation
-- Creating custom workflows
-- Learning GitHub Actions syntax
-
-## Part of the LXGIC Dev Toolkit
-
-This is one of 110+ free developer tools built by LXGIC Studios. No paywalls, no sign-ups, no API keys on free tiers. Just tools that work.
-
-**Find more:**
-- GitHub: https://github.com/LXGIC-Studios
-- Twitter: https://x.com/lxgicstudios
-- Substack: https://lxgicstudios.substack.com
-- Website: https://lxgicstudios.com
-
-## Requirements
-
-No install needed. Just run with npx. Node.js 18+ recommended. Needs OPENAI_API_KEY environment variable.
-
-```bash
-npx ai-github-action --help
-```
-
-## How It Works
-
-Takes your plain English description and generates GitHub Actions YAML with the right triggers, jobs, and steps. The AI knows common patterns and best practices for different workflows.
-
-## License
-
-MIT. Free forever. Use it however you want.