johnnywang2001

Convert, analyze, and generate colors from the CLI. Supports HEX, RGB, HSL, HSV, CMYK conversion, WCAG contrast ratio checking (AA/AAA compliance), palette g...

Manipulate CSV files from the command line — view, filter, sort, select columns, convert CSV to/from JSON, compute statistics, deduplicate, and merge files....

Generate secure passwords, passphrases, and PINs with entropy analysis. Use when the user needs a random password, passphrase, PIN, or wants to check how str...

Compare two text files or strings side-by-side or unified. Highlights additions, deletions, and changes with color. Supports word-level diff, ignore-whitespa...

Monitor competitors' websites, social media, pricing, and product changes automatically. Use when the user wants to track competitor activity, detect website...

Track, analyze, and optimize LLM API spending across providers (OpenAI, Anthropic, Google, DeepSeek, etc.). Use when the user asks about API costs, token usa...

Generate placeholder text for design mockups, development, and testing. Supports classic Lorem Ipsum, hipster-style, and tech jargon. Output as plain text, H...

Semantic Versioning (SemVer 2.0.0) toolkit for parsing, validating, comparing, bumping, and sorting version strings. Use when working with software versions,...

Analyze and visualize project dependency trees from manifest files. Supports Node.js (package.json), Python (requirements.txt, pyproject.toml), Go (go.mod),...

Manage .env files with validate, diff, template generation, merge, and missing-key checks. Use when working with environment variable files, comparing .env.l...

Validate email addresses with syntax checks (RFC 5322), MX record verification, disposable/temporary email detection, and common typo suggestions. Use when v...

Domain WHOIS lookup toolkit for querying registrar, creation/expiry dates, nameservers, status, and registrant info. Use when looking up domain ownership, ch...

Analyze text files for word count, character count, line count, sentence count, reading time, speaking time, readability scores (Flesch Reading Ease, Flesch-...

CIDR and subnet calculator for network engineers. Calculate network address, broadcast, host range, subnet mask, wildcard mask, and more from CIDR notation....

Look up IP geolocation, find your public IP, perform reverse DNS, and run bulk IP lookups. Uses free APIs (ip-api.com, ipify) with no API key required. No ex...

Generate, install, and manage Git hooks with pre-built templates. Includes hooks for linting staged files, enforcing conventional commits, blocking debug sta...

Make HTTP requests from the command line with support for auth (Bearer, Basic, API key), custom headers, JSON/form body, response formatting, timing, and his...

Validate JSON data against JSON Schema, generate schemas from sample JSON, and convert schemas to TypeScript interfaces, Python dataclasses, or Markdown docs...

Full-featured YAML toolkit for validating, formatting, converting, merging, and querying YAML files. Supports YAML-to-JSON, JSON-to-YAML, schema validation,...

Format, minify, and lint SQL queries from the command line. Formats SQL with proper indentation and keyword casing, minifies by removing whitespace and comme...

Generate, validate, and analyze robots.txt files for websites. Use when creating robots.txt from scratch, validating existing robots.txt syntax, checking if...

Fast TCP port scanner for network reconnaissance and security auditing. Scan hosts for open ports, detect common services, and identify potential attack surf...

Test, match, extract, replace, explain, and validate regular expressions from the command line. Includes a library of 25+ common patterns (email, URL, IP, ph...

Complete guide to upgrading OpenClaw's memory system for persistent, searchable context across sessions. Implements 6 upgrades including enhanced memory flus...

Analyze code quality metrics including lines of code by language, cyclomatic complexity (Python), function/class counts, comment ratios, and largest file ran...

Analyze git repository statistics including contributor rankings, lines of code by language, commit frequency by day/hour, monthly activity trends, and file...

Generate realistic fake/mock data for testing and development. Supports names, emails, addresses, phone numbers, UUIDs, dates, lorem ipsum, credit cards, com...