SLIM Language — VSCode Extension
Syntax highlighting, code folding, and snippets for .slm files (Structured LLM Instruction Markup v2.0).
Install
From VSIX (local build)
npm install -g @vscode/vsce
cd vscode-slim
vsce package # produces slim-language-2.0.0.vsix
code --install-extension slim-language-2.0.0.vsix
From VS Marketplace
Search "SLIM Language" in the Extensions panel once published.
Features
| Construct |
Colour |
@key: value |
Grey — orchestrator-only, stripped from LLM |
@+key: value |
Teal — LLM-visible header |
~ comment |
Green italic — stripped from LLM |
::SECTION_NAME type |
Purple bold — named section |
:::NESTED_NAME type |
Purple — nested section |
> CALL args |
Yellow — directive |
$var |
Orange — variable reference |
:schema_name |
Green — schema definition |
# Heading |
White bold — section heading |
Snippets
| Prefix |
Expands to |
slim-header |
Basic @slim: 2.0 header |
slim-full |
Full header with model/retry/agent/task |
slim-agent |
Complete agent config template |
slim-workflow |
Workflow template with directives |
:: |
Named section |
::: |
Nested section |
> CALL |
CALL directive |
:tool |
Schema definition |
SLIM Quick Reference
@slim: 2.0 ← required first line
@model: claude-... ← stripped from LLM (orchestrator only)
@+name: Bot ← LLM-visible header
~ This is a comment (stripped)
::ROLE
You are a helpful assistant.
::INSTRUCTIONS
Follow these rules carefully.
::CODE_1 python
def foo(): pass
::CONTEXT markdown
Background information here.
> CALL analyze(x: $input)
> ASSERT $result.ok == true
> YIELD $result.output
:my_tool
desc: A tool
arg!: str
opt?: int = 0
-> result: json
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