RTL / Bidi Lint

SkillDocs & knowledge

Use when reviewing or generating Arabic text, UI strings, HTML or Markdown that mixes RTL with LTR content, to catch digit mixing, unbalanced bidi isolates, stray LTR marks and hardcoded dir="ltr".

Use RTL / Bidi Lint in Claude, ChatGPT or Ahel Desktop

Free. Sign in, add RTL / Bidi Lint and connect your AI. About a minute.

Claude ChatGPT Ahel Desktop

Also: Claude Code · Cursor · Codex

Then ask your AI: use the RTL / Bidi Lint skill

Details

Instructions available. Your AI can read the instructions. Execution depends on the setup they require.

Account requirements not reviewed. Check the skill instructions before use; Ahel provides instructions and does not run this skill.

No other account needed.

Add Ahel to your AI once: Claude, ChatGPT, Cursor, Claude Code or Codex. Then ask it to use this.

RTL / Bidi LintStart free

What this skill tells your AI

The instructions your AI receives, as published by h9-tec/arabic-ai-atlas in skills/rtl-bidi-lint/SKILL.md and read by Ahel’s review.

Runs a small stdlib-only linter over text files and explains each finding.

Run

python ${CLAUDE_PLUGIN_ROOT}/skills/rtl-bidi-lint/bidi_lint.py <files...>

Output lines look like path:line: CODE message. Exit code 1 means findings, 0 means clean.

Codes and fixes

Code	Meaning	Fix
`MIXED_DIGITS`	Arabic-Indic (٠-٩ or ۰-۹) and ASCII (0-9) digits on one line	Pick one digit system per document. Use ASCII for code, IDs, prices and data; Arabic-Indic only for prose when the audience expects it.
`UNBALANCED_ISOLATE`	U+2066, U+2067 or U+2068 opened without a matching U+2069	Close every isolate. Wrap embedded LTR runs (names, URLs, code) as U+2068 ... U+2069 (first-strong isolate).
`LTR_MARK_IN_ARABIC`	U+200E sits between Arabic letters	Remove it. It breaks letter joining and shaping. If direction needs forcing, use an isolate around the foreign run instead.
`HARDCODED_LTR`	`dir="ltr"` on a line that contains Arabic	Use `dir="auto"` for user content, or `dir="rtl"` for known-Arabic blocks.

Procedure

Run the script on the files in question (or write the text to a temp file first).
For each finding, show the line and apply the fix from the table.
Re-run until exit code 0.

Limits

The linter is line-based and heuristic. It does not render text, so check the final result visually when layout matters.

Signals

GitHub stars: 32
Forks: 4
Last commit: Oct 2026

Ahel review

K5info
obfuscation (in bidi_lint.py)

Automated review, not a security audit. Ruleset v1+k2.

Advanced

Item type: skill
Key: rtl-bidi-lint
Source: github.com/h9-tec/arabic-ai-atlas

github.com/h9-tec/arabic-ai-atlas