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📏 Handle Rules Linter
Check a desired handle against every platform's username rules and find the form that works everywhere. Flags handles that break a platform's length limits, use a disallowed character (like a period on YouTube or TikTok), or start with a disallowed character, and recommends the safe consistent form (4 to 15 lowercase alphanumeric). Covers X, Instagram, TikTok, YouTube, Twitch, GitHub, and Bluesky. It checks the rules, not availability.
$9
· or 45 creditsSecure checkout via Stripe
About this skill
What it does
The Handle Rules Linter is a specialized structural analysis tool designed to validate social media handles against the specific formatting constraints of X (Twitter), Instagram, TikTok, and YouTube. It ensures your branding remains consistent by identifying technical violations before you commit to a username.
Why use this skill
Manual validation is error-prone; every platform has different rules regarding character counts, allowed symbols (underscores vs. periods), and starting characters. Instead of trial-and-error registration, this skill uses a local rules engine to audit your handle ideas instantly. It provides a "safe form" suggestion—a version of your handle optimized to work across all four major platforms simultaneously.
How it works
The skill processes your input—whether it's a single handle or a list in a .txt file—against a local database of platform specifications. It identifies risks such as TikTok's period limitations or X's 15-character cap. Unlike generic AI prompting, this skill utilizes a deterministic Python scanner and an audit checklist to ensure 100% accuracy against known platform specifications without the "hallucinations" of a standard LLM.
The Output
You receive a comprehensive audit report including a scope summary, a breakdown of findings by severity, and a "Common Ground" suggestion that works across all supported networks. It also explicitly lists technical limitations to ensure you know exactly what was validated.
Details
How to install
Drop the file into your AI Agent. Works with Claude, Cursor, ChatGPT, and 20+ more.
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Security Scanned
Passed automated security review
Permissions
File Scopes
Read-only. The per-platform rules load from an editable references/platform-rules.json, so you can update limits or add platforms without touching code. Reads no environment variables.
Creator
JustHandled Labs builds focused agent skills for the work nobody wants to do by hand. Each one is a single repeatable job done well: catching the security and data mistakes that quietly ship, keeping docs and tests honest, gating the commands an agent is about to run, sharpening writing, and handling the founder chores around launches, outreach, and brand setup. Not generic AI productivity. Specific workflows that are easy to run, review, and repeat. Maintained by H.J. Westerfield, with a background in communications, editing, project coordination, customer support, and practical AI systems. Tools for people who want useful automation without theatrical complexity.
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