opencode-replace-text

OpenCode plugin that replaces Unicode characters in AI output with plain ASCII equivalents.

Why?

AI models frequently generate text with curly/smart quotes, em dashes, en dashes, ellipsis, arrow symbols, and invisible characters (zero-width spaces, joins, BOM). I prefer to replace these in my code, which is the purpose of this plugin.

Features

• Replaces smart quotes -> straight quotes
• Replaces em dashes -> -, en dashes -> -
• Replaces arrows (right arrow -> ->, double right arrow -> =>, etc.)
• Strips invisible characters (zero-width, BOM, soft hyphens)
• Normalizes double spaces
• Hooks into AI response text and file writes (Write/Edit tools)
• Configurable replacements - customize via opencode.json

Installation

npm (coming soon)

npx opencode-replace-text

Then add to your opencode.json:

{
    "plugin": ["opencode-replace-text"]
}

Manual (use now)

Copy src/index.ts to your OpenCode plugins directory:

# Project-local
mkdir -p .opencode/plugins
cp src/index.ts .opencode/plugins/replace-text.ts

# Or global
cp src/index.ts ~/.config/opencode/plugins/replace-text.ts

Then register in opencode.json:

{
    // Project-local:
    "plugin": ["./plugins/replace-text.ts"],
    // Global:
    // "plugin": ["./plugins/replace-text.ts"]
}

Restart OpenCode after installing.

Configuration

Coming soon - configure which replacements to apply and add your own via opencode.json.