Claude Code Skills·Claude Skills·The open SKILL.md registry for Claude
ClaudSkills / Security / threat-hunting

Txt Bidi

Category: Security  ·  Sub-category: threat-hunting  ·  Last updated:
lang:swift
Handle bidirectional text, right-to-left languages, mixed Arabic/Hebrew/Latin content, writing-direction APIs at every layer, and cursor/selection behavior in bidi text. Covers NSParagraphStyle.baseWritingDirection, the .writingDirection attributed-string key with embedding/override modes, AttributedString.writingDirection, UITextInput.setBaseWritingDirection, SwiftUI .environment(\.layoutDirection), iOS 26 Natural Selection (selectedRanges), Unicode bidi controls (LRM/RLM/LRE/RLE/PDF/FSI/PDI), .natural vs .left/.right alignment, and visual vs logical order. Use when adding RTL support, debugging cursor jumps in mixed content, fixing phone numbers that reorder in Arabic context, migrating to selectedRanges, or making a custom UITextInput view bidi-correct. Trigger on Arabic, Hebrew, RTL, or "cursor moves wrong" even without bidi APIs named. Do NOT use for general localization or locale-aware formatting (out of scope for this repo).

About this skill (catalog notes)

Txt Bidi includes 5 code blocks for direct copy-paste. At roughly 1,538 words the SKILL.md is on the longer end of the catalog distribution.

License
MIT
Indexed lastmod
Catalog position
Security · threat-hunting
Indexed related skills
10

How Txt Bidi fits the catalog

Txt Bidi sits in the Security category under the threat-hunting sub-topic in the ClaudSkills catalog. There are 10 related skills indexed alongside it; comparing a few before installing usually reveals which fits your workflow best.

These notes are auto-generated from features detected in the SKILL.md file and from this catalog's structure — they aren't part of the source repository.

From the source SKILL.md

Authored against iOS 26.x / Swift 6.x / Xcode 26.x.

What this skill does

Txt Bidi is a community-contributed Claude Code skill in the threat-hunting sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/txt-bidi/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when adding RTL support, debugging cursor jumps in mixed content, fixing phone numbers that reorder in Arabic context, migrating to selectedRanges, or making a custom UITextInput view bidi-correct. Trigger on Arabic, Hebrew, RTL, or "cursor moves wrong" even without bidi APIs named.

Who uses this skill

The Txt Bidi Claude Code skill is built for security engineers, penetration testers, DevSecOps practitioners, and development teams hardening codebases and infrastructure. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 118,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/txt-bidi
curl -L https://claudskills.com/skills/txt-bidi/SKILL.md \
  -o ~/.claude/skills/txt-bidi/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/txt-bidi/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/txt-bidi/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\txt-bidi\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Telegram

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Txt Bidi Claude Code skill?
Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/txt-bidi/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.
What does the Txt Bidi skill do?
Handle bidirectional text, right-to-left languages, mixed Arabic/Hebrew/Latin content, writing-direction APIs at every layer, and cursor/selection behavior in bidi text. Covers NSParagraphStyle.baseWritingDirection, the .writingDirection attributed-string key with embedding/override modes, AttributedString.writingDirection, UITextInput.setBaseWritingDirection, SwiftUI .environment(\.layoutDirection), iOS 26 Natural Selection (selectedRanges), Unicode bidi controls (LRM/RLM/LRE/RLE/PDF/FSI/PDI), .natural vs .left/.right alignment, and visual vs logical order. Use when adding RTL support, debugging cursor jumps in mixed content, fixing phone numbers that reorder in Arabic context, migrating to selectedRanges, or making a custom UITextInput view bidi-correct. Trigger on Arabic, Hebrew, RTL, or "cursor moves wrong" even without bidi APIs named. Do NOT use for general localization or locale-aware formatting (out of scope for this repo).
Is this skill free to install?
Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.
When should I use the Txt Bidi skill?
Use Txt Bidi when your Claude Code task falls under the Security category — specifically in the threat hunting area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Txt Bidi" or describe the task and let Claude pick). Browse related skills at /category/security/.
What is a Claude Code skill and how does the Txt Bidi skill fit in?
A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Txt Bidi is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Security category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA
ClaudSkills. (2026). Txt Bidi [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/txt-bidi/
BibTeX
@misc{txt-bidi-2026,
  author    = {ClaudSkills},
  title     = {Txt Bidi [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/txt-bidi/}
}

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