// brand presence
Handle Rules Linter
Check a desired handle against every platform's username rules and find the form that works everywhere. X caps at 15, YouTube and TikTok reject periods, and you usually find out one platform at a time.
What it flags
- Length-limit violations per platform.
- Disallowed characters per platform.
- Disallowed starting characters.
- Whether the handle is consistent-safe (4 to 15 lowercase alphanumeric).
- Covers X, Instagram, TikTok, YouTube, Twitch, GitHub, and Bluesky.
How to run
Pass a handle or a list. Read-only. Platform rules are editable.
Good to know
It checks format and cross-platform consistency only. It does not check whether a handle is available; that needs a live lookup.
Questions
Does it tell me if a handle is taken?
No, that needs a live check. This checks the rules and consistency.
Which platforms does it cover?
X, Instagram, TikTok, YouTube, Twitch, GitHub, and Bluesky, with editable rules.
Pick a handle that works everywhere.
Current price and purchase option are shown on Agensi. Instant download. Works with any agent that reads SKILL.md.
Get the Handle Rules Linter on Agensi