PromptL for VS Code

Language support for PromptL - a templating language for LLM prompts.

Features

Syntax Highlighting - Full syntax support including YAML frontmatter, message tags, mustache expressions, and control flow
Real-time Diagnostics - Catch syntax errors, undefined variables, and invalid references as you type
Go to Definition - Cmd+Click on <prompt path="..."> to navigate to referenced files
Hover Information - See details about referenced prompt files
Auto-closing - Automatic bracket and tag completion

Install from the VS Code Marketplace or search for "PromptL" in VS Code extensions.

Setting	Default	Description
`promptl.diagnostics.enable`	`true`	Enable real-time diagnostics
`promptl.diagnostics.validateReferences`	`true`	Validate that `<prompt path="...">` references exist

{
    "promptl.diagnostics.enable": true,
    "promptl.diagnostics.validateReferences": true
}

PromptL files (.promptl) support:

<system>
You are a helpful assistant.
</system>

<user>
Hello!
</user>

<user>
Hello, {{ name }}!
Your score is {{ score * 100 }}%.
</user>

{{ if showInstructions }}
<system>
Follow these instructions...
</system>
{{ endif }}

{{ for item in items }}
- {{ item.name }}
{{ endfor }}

---
model: gpt-4
temperature: 0.7
---

<system>Your prompt here</system>

<prompt path="./shared/persona.promptl" />

See the main repository for development instructions.

MIT