Icon Lookup

BMP PUA Unicode Workaround

Claude Code filters Unicode characters in the BMP Private Use Area (U+E000-U+F8FF), which includes most Nerd Font icons. This skill provides tools for working with these icons.

Quick Reference

| Range | Status | Examples | | ------------------------------ | ------------------------------- | ------------------------------------------- | | U+E000-U+F8FF (BMP PUA) | Filtered - use placeholders | Powerline, Devicons, Font Awesome, Octicons | | U+F0000+ (Supplementary PUA-A) | Works directly | Material Design Icons (nf-md-*) |

Automatic Features

When reading files: A PostToolUse hook automatically identifies all PUA characters, showing icon names, codepoints, and whether they're filtered.

When writing files: A PostToolUse hook automatically converts placeholder syntax to actual Unicode characters.

Placeholder Syntax

When writing icons in the filtered BMP PUA range, use placeholder syntax:

• By codepoint: {{ U+E0A0 }} (without the spaces)
• By name: {{ nf-fa-star }} (without the spaces)

Icon Lookup

Search for icons by name:

python3 ${CLAUDE_PLUGIN_ROOT}/scripts/lookup-icon.py ""

Example searches:

• git branch → finds git-related icons
• folder → finds folder/directory icons
• wizard → finds wizard icons

Character Identification

Identify a specific character:

# Direct argument (this is nf-md-battery, a Supplementary PUA icon)
python3 ${CLAUDE_PLUGIN_ROOT}/scripts/identify-icons.py -c "󰁹"

# From stdin
echo "󰁹" | python3 ${CLAUDE_PLUGIN_ROOT}/scripts/identify-icons.py -

Workflow

1. Reading files - Hook automatically shows icon info; use this to understand what icons are present
2. Writing icons - Search with lookup script, then use placeholder syntax for filtered icons
3. Comparing icons - Use identify script to check if two characters are the same icon
4. Material Design Icons (U+F0000+) can be written directly without placeholders

Manual Conversion

If placeholders weren't converted (e.g., hook didn't run):

${CLAUDE_PLUGIN_ROOT}/scripts/convert-placeholders.py /path/to/file

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: malob
• Source: malob/nix-config
• License: MIT

Install and usage instructions live in the source repository linked above.